bluuebunny/crossref_metadata_2025 huggingface dataset:
Mathematical Modeling and Experimental Evaluation of the Stress in the Connecting Elements of the Rods at a Rotational-Impact Loading
Authors: Saruev Lev A. , Vasenin Sergei S.
Published: June 2015

The experimental results are presented for the research on stress in the connecting elements of the rods at a rotational-impact loading. The oscillograms are made demonstrating the power pulses and tangential stresses in the threaded joint.
Simulation of the Technological Process of the Strengthened Treatment of the Drill Pipes Thread
Authors: Pesin M.V.
Published: June 2015

Computer simulations of the hardening of the hollow carving deep roll have been performed. The conceptual and mathematical formulation of the problem is determined. As a result of a series of numerical experiments using ABAQUS package evaluation of residual stresses distributions are obtained depending on the degree mounting of the roll.
Control Problems for 2-D Electromagnetic Wave Scattering Model
Authors: Lobanov Alexey
Published: June 2015

We consider the control problem for two-dimensional model of the electromagnetic field, which describes the scattering TM-polarized electromagnetic waves in an infinite homogeneous medium containing permeable dielectric obstacle with a covered for masking boundary. The role of control function is played by index of refraction of the dielectric obstacle. We prove the solvability of the control problem, derive the optimality system, which describes the necessary conditions of an extremum and develop an efficient numerical algorithm for the solution of the control problem.
Study on Neural Networks Usage to Analyse Correlation between Spectrum of Vibration Acceleration Signal from Pin of Ball Mill and its Filling Level
Authors: Eremenko Yuri , Poleshchenko Dmitry , Glushchenko Anton
Published: June 2015

The question about modern intelligent information processing methods usage for a ball mill filling level evaluation is considered. Vibration acceleration signal has been measured on a mill laboratory model for that purpose. It is made with accelerometer attached to a mill pin. The conclusion is made that mill filling level can not be measured with the help of such signal amplitude only. So this signal spectrum processed by a neural network is used. A training set for the neural network is formed with the help of spectral analysis methods. Trained neural network is able to find the correlation between mill pin vibration acceleration signal and mill filling level. Test set is formed from the data which is not included into the training set. This set is used in order to evaluate the network ability to evaluate the mill filling degree. The neural network guarantees no more than 7% error in the evaluation of mill filling level.
Acoustic Emission Diagnostics of the Destruction of Welded Joints Stainless Steel Pipes Arising Welding
Authors: Apasov A.M.
Published: June 2015

It is now possible to formulate the relation of the linear size of cracking arising on welding the cylindrical homogeneous-metal. Mathematical simulation of metal crystallization on welding and micro structural analysis give an insight into the fact that there begins crack nucleation in a weld root. Experimentally, by means of Acoustic Emission (AE), one can study welding and obtain the amplitude distribution of AE signals from cracking against the background of the hindrance accompanying this process. The conditions were found making impossible cracking.
Prospects of Creating Products Using Selective Laser Sintering
Authors: Saprykin A.A. , Babakova E.V. , Ibragimov E.A. , Dudikhin D.V.
Published: June 2015

At present, the development of techniques and technology can’t do without innovations in production. This explains the desire of mankind to look for innovative ways to produce different types of products. One of these systems is the production method of selective laser sintering. It is more promising as compared to other rapid prototyping techniques, due to the relative cheapness of materials and time-consuming to produce finished products. This article discusses the method of selective laser sintering, its advantages and disadvantages.
The Ratio-Delay Method of the Manufacturing System Analysis
Authors: Sattarova Kseniya T. , Kokareva Victoria V. , Pronichev Nikolay D.
Published: June 2015

This paper describes the application of a ratio-delay to a study of operations of mechanical Job-Shop production in Samara factory. To analyze the operations efficiency it may be necessary to obtain organizational and technical data in each job stages. In fact, ratio-delay is an effective tool to determine direct labor productivity for shop floor activities. In the context of manufacturing operations, ratio-delay can determine productivity levels as a baseline that provides focus for new “industrial engineered” improvement measures of complex re-engineering project or lean management.
State and Business Partnership as an Adaptation Instrument of Mechanical Engineering and Power Engineering Sector towards Global Climate Changes
Authors: Barysheva G.A. , Artcer T.V. , Casati F.
Published: June 2015

The following article looks how the climate changes influence on dangerous industries. Global warming provokes natural disasters - hurricanes, tsunami, earthquakes – that have negative influence on ultra dangerous industries. In the article particularly there is an example of Japanese “Fokusima – 1” atomic power plant accident which was caused by the earthquake and tsunami. In economics theory there are two points how to reduce ecological risks. The first one is based on state restrictive measures – financial instruments. The second point is based on business adaptation branches of economy, in particular, mechanical engineering to constantly changing climate conditions of management. The article suggests economical strategy which combining resources of state, business, scientific institutes and non-profit organizations to reduce the risk of technogeneous disasters.
Numerical Analysis of Inverse Problems for the Model of Transfer of Industrial Environmental Pollution in the Machine-Building
Authors: Soboleva O.V.
Published: June 2015

The model of transfer of polluting substance is considered. Inverse extremum problem of identification of the coefficients in an elliptic convection-diffusion-reaction equation is formulated. The solvability of this problem is proved and the optimality system is constructed for specific cost functional. The numerical algorithm based on Newton-method of nonlinear optimization of linear elliptic problems is developed and programmed on computer. The results of numerical experiments are presented. Influence of coefficient of convection on stability of algorithm of the solution of the inverse extremum problem is investigated.
The Subjects of Automated Competitiveness Monitoring of Science-Intensive Products in Engineering
Authors: Tashchiyan G.O. , Sushko A.V. , Kaz M.S.
Published: June 2015

Manufacturing competitive science-intensive engineering products is one of the most important tendencies of the modern stage of Russian economy development. Various means are applied to assess the competitiveness including automated competitiveness monitoring of science-intensive products at machinery production. A separate issue is building a team of experts for the survey. To solve this problem we engage a forward-looking businessman, a professional manager, an independent expert and a potential consumer as the subjects of the dialogue.
Process Water Treatment at Metallurgical and Machine Building Enterprises
Authors: Gizatulin R.A. , Senkus V.V. , Valuev D.V. , Valueva A.V. , Saranchuk E.V. , Serikbol A.
Published: June 2015

The paper provides consideration of technologies and technical tools for purification of process water of metallurgical and machinebuilding enterprises.
Lean Principles-Based Optimization of the Manufacturing System
Authors: Kokareva Victoria V. , Malyhin Andrey N. , Smelov V.G.
Published: June 2015

This paper takes a first step toward connecting theory concerning Lean methodology and the manufacturing organization by using Tecnomatix Plant Simulation tools. We built a simple Input-Output production model to show the main Method and Objects in Tecnomatix Plant Simulation, which are optimized systems for reducing waste and increasing throughput.
Calculation of Grillage Strip Foundation in Area of Karst Collapses Formation
Authors: Sharapov Ruslan V. , Lodigina Nina D.
Published: June 2015

Now the most pressing and to end unresolved question is the determination of the design parameters for the base in the conditions of formation of karst deformations. Foundation calculations made on the basis of forecasting karst manifestations sizes and the likelihood of their formation at the base of the designed construction. In paper presented the grillage calculation scheme. We calculated the grillage with four bays for four cases: excluding karst collapse, taking into account the collapse of a single support, taking into account the collapse under two not adjacent supports and taking into account the collapse at two adjacent supports. In paper presents the diagrams of bending moments and shear forces.
Automation Tool Preparation in the Conditions of Production
Authors: Yuanyushkin A.S. , Lobanov D.V. , Rychkov D.A.
Published: June 2015

The key task of the tool manufacturing is to create or to choose such a type of tool, which would permit to provide high processing efficiency, the best tool`s workability and the quality of the machined surfaces with minimum expenses and resources. The optimal choice of the constructive tool modifications from a variety of options takes much time required for the preparation of the tool to work. To solve this problem, we have developed software that allows you to create, organize and carry out a comparative analysis of structural instruments in order to identify rational option for the given conditions of production. Ordering and selection of a rational design of the instrument is carried out in accordance with established procedures of modeling and comparative analysis of design solutions. Application software can reduce design time technological process by 80...90%, and get a substantial annual economic effect.
The Analysis of Microstructure and the Properties of the Metallic-Matrix Composite on the Basis of the Copper and Aluminum Oxide
Authors: Ivashutenko Aleksander S. , Martyushev Nikita V. , Vodopyanov E.M. , Bezborodov Valeriy P.
Published: June 2015

The article is devoted to the analysis of the possibilities to obtain gradient materials by the method of spark plasma sintering. Pure copper powders consisting of particles with the average particle size 100 microns and the nanodispersed powder of aluminum oxide were used in this study. Two powder compositions - pure copper powder and a mixture of copper powder and aluminum oxide powder were sintered:. As a result of the sintering process a sample with a double-area structure has been formed with a well-defined boundary between these areas. After sintering the copper powder porosity remained at the initial level. But having been mixed and sintered, the aluminum oxide powder particles agglomerated up to the average particle size of 80 – 100 microns.
Modern Approaches to Efficient Use of Mn-Containing Raw Material in Steel Production
Authors: Nokhrina O.I. , Rozhihina I.D. , Proshunin I.E. , Hodosov I.E. , Osipova V.G.
Published: June 2015

A flow diagram of complex concentration of polymetallic manganese-containing ores of the Altai-Sayan new deposits is developed. Process conditions of recovery of valuable components by chemical concentration are determined. The results of use of high-quality concentrates of manganese, ferrum and nickel at manufacture of steel and metallic manganese are included.
Use of Nanopowders of Metals in Different Branches of Industry
Authors: Byvalets O.A. , Avilova I.A. , Chugunov S.A. , Belyaev A.G.
Published: June 2015

This article describes a technology of producing high-dispersive powders of metals using plasma-chemical synthesis method. The characteristic features of metal nanoparticles resulting from plasma-chemical synthesis are analyzed. The facts of the application of the adsorption method of water purification that makes it possible not only to cope with the task effectively, but also to carry out recuperation of these substances are identified and illustrated.
Risk Assessment of Third-Party Damage Index for Gas Transmission Pipeline around a Suburb in Benin City, Nigeria
Authors: Ariavie Godfrey Omonefe , Oyekale Joseph Oyetola
Published: June 2015

This study was carried out to assess risk assessment of Third-party damage index for a gas transmission pipeline around a suburb in Benin City, Edo State, Nigeria. A full length walk survey was carried out for the 12 km gas transmission pipeline of the Nigeria Gas Company that transcends Uteko community via Benin Auchi road through Osina town and some part of Benin Agbor road, all in Edo State of Nigeria. The 12 km pipeline facility surveyed was sectioned into a total of 60 test points (labelled P1 to P60), each test point measuring up to 200 m. The surveyors examined the third party index variable score for each of Minimum Depth of Cover, Activity Level, Aboveground Facilities, Line Locating, Public Education, Right-of-way Condition, and Patrol Frequency third-party variables. An overall third-party index score of 29.87% was obtained. This means that the surveyed 12 km pipeline is highly susceptible to failure due to third-party activities. This was perceived to be the consequence of the high level of insensitivity to, and lack of proper control of the third party activities taking place in the facility location. The study suggested measures to be employed in order to mitigate possible damages to the pipeline occasioned by third party activities, thereby bringing to the fore, the current drive to ensure pipeline safety and integrity.
Influence of Various Reaction Parameters on the Process for Preparation of SiO2/TiO2 Core-Shell Particles
Authors: You Jhin Hong , Kuo Yi Yin , Hsu Keh Ying
Published: June 2015

This study aims to describe the preparation and characterization of SiO2/TiO2 core-shell particles. In order to prepare the homogenous SiO2/TiO2 inorganic compounds by sol-gel process, SiO2 particles were used as the core, AcAc served as a chelating agent to chelate with TTIP (which was used as the precursor to TiO2), and PEG was added to stabilize the hydrolysis/condensation process. In addition, the ionic surfactant (SDS) and the nonionic surfactant (PVP) dispersed the core-shell particles. In order to improve the crystal structure, a high temperature was used to calcine the core-shell particles. The influence of various reaction parameters on the size, morphology and composition of the particles was also investigated. The properties of the particles were analyzed by electron microscopy, fourier transform infrared analysis, thermogravimetric analysis and powder X-ray diffraction.
Morphology-Controlled Synthesis of Single Crystalline α-Mn2O3 Sea-Urchins Assembled with Pen-Type Nanoneedles and Broad Absorption Spectrum
Authors: Javed Qurat Ul Ain , Abbas Hussain , Mahmood Hasan , Sattar Abdul , Wang Feng Ping , Kamran Muhammad Arshad , Rafique M.Y. , Toufiq A. Muhammad
Published: June 2015

Single crystalline high quality α-Mn2O3nanorods and sea-urchins assembled with pen-type nanoneedles have been successfully synthesized by template-free hydrothermal route. The variation in hydrothermal temperature has affected the morphology of the α-Mn2O3sea-urchin assembled with the nanoneedles noticeably. The influence of temperature change on the thickness, crystallinity, surface morphology and optical properties of α-Mn2O3has been characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX) analysis, Transmission Electron Microscopy (TEM), High Resolution Transmission Electron Microscopy (HRTEM), Raman Spectroscopy (RS) and UV-visible Spectroscopy. The results showed that in our experimental conditions, single crystalline nanorods of the α-Mn2O3were obtained at a low temperature of 180 °C, while single crystalline sea-urchin assembled with pen-type nanoneedles were obtained by increasing the temperature to 280 °C. Nanorods and sea-urchin assembled with pen-type nanoneedles obtained had the well defined morphology and crystalline quality. The sea-urchin synthesized at 280 °C exhibited more than 90% absorption in UV-visible spectrum.
Reusable Mn-Doped ZnS Magnetic Nanocomposite for Photodegradation of Textile Dyes
Authors: Nguyen Van Cuong , Luu Thi My Dung , Nguyen Thi Oanh
Published: June 2015

Magnetic nanoparticles of manganese doped ZnS has been synthesized with different molar ratios of manganese and zinc by co-precipitation method. Structure of the prepared nanocomposite was investigated using FT-IR, XRD, TEM and VSM. The most excellent photodegradation efficiency of Reactive Blue 198 (RB198) was observed with the molar ratio of Mn-doped ZnS/Fe3O4 and it was 1:1 in which molar percentage of Mn2+ was 9%. The experiments of dye degradation were carried out under visible light and UV radiation. Results shown that the degradation efficiency of RB198 was up to 100% at the concentration of 200 ppm for 10 minutes when the amount of catalyst was 0.2g/l. Additionally, the effect of various parameters including initial concentration, illumination time and pH to the photodegradation efficiency of dye was also carried out. More interestingly, the reusable experiments showed that the nanocomposited exhibited high photodegradation capacity after three cycles and can be recycled conveniently from water with the assist of an external magnet because of its exceptional properties.
TGI 4 - Intrusion Related Mineralisation Project: a synthesis
Authors: Rogers N
Published: June 2015

The Targeted Geoscience Initiative 4 (TGI 4) was a 2010-15 Government of Canada research program to conduct thematic, knowledge-driven ore systems studies aimed at assisting in the discovery of future resources through more effective targeting of buried mineral
deposits. Intrusion related (e.g., porphyry) deposits are the world's most important sources for Cu, Mo, W and Sn, as well as being a major contributor of Au, Ag, and PGEs. Porphyry deposits are typically large, low- to medium-grade deposits in which mineralisation is hosted within and immediately
surrounding distinctive intrusive phases within larger intrusive complexes that commonly have prolonged emplacement histories. To develop more effective exploration criteria to identify and evaluate deeply buried and/or hidden fertile intrusive mineralising systems, studies into Cu-Mo/Au and W-Mo-Sn
systems are aimed at answering the following questions: i) are there distinctive proximal and distal footprints for deposit types that will allow identification of, and vectoring towards hidden economically viable deposits?; and ii) what are the triggering conditions and indicators of an
hydrothermal-magmatic system of size and duration sufficient to develop a large porphyry deposit? To help answer these questions studies are being undertaken at sites associated with the Triassic-Jurassic porphyry deposits of the British Columbia interior and for the array of mineralised Devonian
intrusions developed in the Canadian Appalachians.
A common problem facing Cordilleran and Appalachian exploration is how to detect intrusion-related mineralization through the extensive glacial sediment cover. Consequently, research activities are focussing at identifying key geochemical and mineral indicators in till near known mineralisation and
their detrital dispersal down-ice. Indicators are being developed for the detection of mineralisation, but also the alteration halos and vein systems associated with mineralization, which represent much larger exploration targets than the actual economic orebody itself. Once identified in till,
these indicators can be traced to their bedrock source using reconstructed ice movement vectors.
Structural relationships indicate that Sn-W-Mo mineralised intrusive systems can form due to extension associated with far removed non-orthogonal accretion. Deposits within these bodies form along fluid pathways such as the intersection of high-angle syntectonic breaks. Mineral potential can also be
resolved through trace element fingerprinting. Subtle compositional changes in commonly occurring minerals (i.e., biotite) and fluid inclusions provide evidence of chemical variations related to magma fertility and vectors to mineralisation.
Tectonostratigraphic controls on the Connaigre Peninsula of south-central Newfoundland and their implications for intrusion-related mineral resources
Authors: Rogers N , Kellett D A , McNicoll V
J , van Staal C , Ruberti G , Kerr A
Published: June 2015

The Connaigre Peninsula of south-central Newfoundland has long been considered to be amongst the most complete and best exposed sections of Neoacadian and older Avalonian rocks in the Appalachians. The rocks of this region range from the Cryogenian
volcano-sedimentary rocks of the Tickle Point Formation (ca. 682 Ma rhyolite) to the Middle to Upper Devonian clastic sedimentary rocks of the Great Bay De L'Eau and Poole's Cove formations and Late Devonian Belleoram Granite and Old Woman Stock (ca. 380 Ma). However the recent age determination of
the Pass Island Granite that shows it as Silurian (423 ± 4 Ma), contradicts earlier interpretations that the whole of the Connaigre Peninsula formed on the Avalonian microcontinent. It is now evident that the eastern portion exhibits a distinct Neoproterozoic to Lower Palaeozoic
tectonostratigraphy.
Five distinct phases of granitoid emplacement are recorded across the Connaigre Peninsula. The oldest of these is the Furby's Cove Intrusive Suite (ca. 673 Ma) that intruded the Tickle Point Formation prior to deposition of the Connaigre Bay Group. The later unit is in turn cut by the ca. 620 Ma
Simmons Brook Intrusive Suite. All of these units are cut by a series of ca. 570 Ma intrusive bodies belonging to the Grole and Hardy's Cove intrusive suites and Harbour Breton Granite. At the southern end of Hermitage Bay, Grole Intrusive Suite rocks are intruded by the Silurian Pass Island
Granite. All of these units are restricted to a region between the Hermitage Bay Fault to the west and the White Horse - East Bay fault to the east. The youngest intrusive rocks in the region are the Late Devonian Belleoram and Old Woman granitic bodies, as well as a series of mafic sills and/or
flows on the Boxey Point Promontory, and several minor granitic dykes and small bodies that are considered offshoots of the Belleoram Granite. These Late Devonian intrusions are only known to cut the Ediacaran Long Harbour Group, Latest Ediacaran to Upper Cambrian Young's Cove Group and Devonian
Cinq Isles, Poole's Cove and Great Bay De L'Eau formations, which are restricted to (or in the case of the Cinq Isles and Poole's Cove formations partly overlap) the areas to the east of the White Horse - East Bay fault. Given the different pre-Devonian tectonostratigraphies on either side of the
White Horse - East Bay fault, the Connaigre Peninsula is herein informally divided into the Deadman's Bight (western) and Wreck Cove (eastern) domains.
Intrusion related mineralisation on the Connaigre Peninsula is largely restricted to Mo +/- Cu and fluorite occurrences associated with the Old Woman Stock. Similar Mo deposits occur within the coeval Ackley Pluton to the north-east and the associated minor intrusion on Belle Island. However to date
no Mo mineralisation has been identified within the age equivalent Belleoram Granite, although minor fluorite occurrences are observed.
Petrographic observations and evaporate mound analysis of quartz-hosted fluid inclusions hosted by granitoid samples from the South Mountain Batholith, Nova Scotia: an exploration tool for vectoring towards mineralised areas in intrusive rocks
Authors: Tweedale F , Hanley J J , Kontak D J , Rogers N
Published: June 2015

The ca. 380 Ma South Mountain Batholith (SMB) of Nova Scotia is a large (ca. 7,300 km2), mesozonal granitoid intrusion that consists of 13 coalesced plutons of granodiorite to leucomonzogranitic composition which host a variety of mineralised zones (e.g.,
Sn-Zn-Cu-Ag, Mo, Mn-Fe-P, U, Cu-Ag). Given the hydrothermal nature of this mineralisation, it is expected that a fingerprint of the mineralizing fluids might be manifested both petrographically and by the chemistry of secondary, quartz-hosted fluid inclusions in the granites on a scale equal to or
larger than the mineralised centres. In order to assess the potential of using the petrographic and chemical fingerprints as vector for exploration, a study integrating both these methods was investigated. The protocol involved in the study included the following: (1) completing a detailed
petrographic study of hundreds of archived thin section samples that focused on the extent and degree of alteration that reflect fluid-rock interaction. The indices included: (i) type and abundance of perthite, (ii) chloritic alteration of biotite, (iii) plagioclase alteration, (iv) amount of
secondary white mica, and (v) abundance of secondary fluid inclusions in quartz; and (2) determining the fluid chemistry of quartzhosted fluid inclusions in samples (n = 66) collected from the SMB. For this study, a detailed protocol was developed to address specific analytical considerations,
including decrepitation temperature, oven versus stage heating, EDS calibration, EDS acquisition time, representative sampling and raster versus point mode of analysis. Thus, in this study, quartz chips were heated to 500ºC and a maximum of 16 mounds per sample were analysed (60 seconds) in
raster mode, the latter to circumvent chemical variation related to elemental fractionation during mound formation. To date, the results indicate that the fluids from Phase 1 samples are dominated by a Na-F-Cl-Ca fluid. In contrast, fluids from Phase 2 samples are dominated by two fluid inclusion
populations: a Na-K fluid and a F-Na-Cl-Ca fluid.
Controls on indium mineralisation in tin-tungsten-base metal deposits of the Canadian Appalachians
Authors: Goeddeke C R , Chapman J B , Samson I
M
Published: June 2015

Indium is a minor but potentially economically significant component of the ore metal tenor of many porphyry-style, stockwork and polymetallic vein-type Sn-W and Sn-base metal deposits of the Canadian Appalachians. However, indium distribution between deposits is
highly uneven, and whereas some deposits contain hundreds of kilograms of the metal at grades sufficient to justify recovery, others are near-barren. In order to investigate the fundamental temperature, mineralogical, spatial and chemical controls on indium mineralisation in the district, this study
has taken samples from indium rich and poor occurrences at 10 drilled prospects in southern New Brunswick and southwest Nova Scotia, as well as from the past-producing East Kemptville Mine in Nova Scotia.
Detailed mineralogical characterization of these materials has shown that, contrary to existing models, within this district indium is commonly introduced early in the deposit paragenesis, presumably as a component of the initial, high-temperature magmatic-hydrothermal fluids. During this phase of
mineralisation, indium is dominantly precipitated within copper-rich sphalerite, and it is the distribution of this mineral phase that primarily governs the presence or absence of indium within a mineralised body. During later cooling of the deposit a proportion of the indium is exsolved from
sphalerite during recrystallization, and forms lamellae of a sulphide mineral that resembles sakuraiite in the core zones of many individual sphalerite.
Identifying new vectors to hidden porphyry-style mineralisation
Authors: Rogers N , Plouffe A , Chapman J B , McClenaghan M B , Kellett D A , Anderson R
A
Published: June 2015

Intrusion related (e.g., porphyry) deposits are the most important sources for Cu, Mo, W and Sn, along with Au, Ag, and PGEs. Porphyry deposits are large, low- to medium-grade deposits in which mineralisation is hosted within and immediately surrounding
distinctive intrusive phases within larger intrusive complexes that commonly have prolonged emplacement histories. To develop more effective exploration criteria to identify and evaluate deeply buried and/or hidden fertile intrusive mineralizing systems, studies into Cu-Mo/Au and W-Mo-Sn systems are
aimed at answering the following questions: i) Are there distinctive proximal and distal footprints for each deposit type that will allow identification of, and vectoring towards hidden economic deposits?; ii) Is there evidence of fertility within the root system of intrusions, i.e. what are the
triggering conditions and indicators of an hydrothermal-magmatic system of size and duration sufficient to develop a large porphyry deposit? To help answer these questions studies are being undertaken at sites associated with the Triassic-Jurassic porphyry deposits of the British Columbia interior
and for the array of mineralised Canadian Appalachian Siluro-Devonian intrusions, for which the fundamental geoscience knowledge is often lacking.
A common problem facing Cordilleran and Appalachian exploration is how to detect intrusion-related mineralization through the extensive glacial sediment cover. Consequently, research activities are focussing at identifying key geochemical and mineral indicators in till near known mineralization and
their detrital dispersal down-ice. Indicators are being developed for the detection of mineralization, but also the alteration halos and vein systems associated with mineralization, which represent much larger exploration targets than the actual economic orebody itself. Once identified in till,
these indicators can be traced to their bedrock source using reconstructed ice movement vectors.
Structural relationships indicate that Sn-W-Mo mineralised intrusive systems can form due to extension associated with far removed non-orthogonal accretion. Deposits within these bodies form along fluid pathways such as the intersection of high-angle syntectonic breaks. Mineral potential can also be
resolved through trace element fingerprinting. Subtle compositional changes in commonly occurring minerals (i.e., biotite) and fluid inclusions provide evidence of chemical variations related to magma fertility and vectors to mineralisation.
Glacial stratigraphic, till geochemical, and indicator mineral studies at the Sisson W-Mo and Mount Pleasant Sn-W-Mo-Bi-In polymetallic deposits, southwestern New Brunswick
Authors: Parkhill M A , McClenaghan M B , Seaman A
A , Pronk A G , Rice J
M
Published: June 2015

During the Geological Survey of Canada's (GSC) Targeted Geoscience Initiative (TGI 4; 2010-2015), GSC and the New Brunswick Department of Energy and Mines (NBDEM) conducted indicator mineral case studies around the Sisson W-Mo and the Mount Pleasant Sn-W-Mo-Bi-In
polymetallic deposits in New Brunswick. The objective is to document glacial dispersal patterns of W, Mo, Sn, and In-bearing indicator minerals and matrix geochemical signatures in till at varying distances down-ice of the deposits, in support of exploration in New Brunswick and other glaciated
terrains. This is the first study to document glacial dispersal of W-bearing minerals around a significant W deposit.
At Sisson, 3 tills are present: Illinoian Northumberland till, Early-Middle Wisconsinan Caledonia till, and the geochemically barren, Younger Dryas, Collins Pond till. This presented sampling challenges as the tills are deposited by ice flows from different source areas and are geochemically
distinct but not easy to distinguish. At Sisson, 79 bulk till samples were collected up-ice, overlying, and up to 14 km down-ice (SE) of the deposit. The distribution of sample sites was guided by previous sampling by Kidd Creek Mines and the NBDEM. Stream water, silt, and bulk samples were
collected at 16 sites at Sisson to characterize scheelite abundance, size, and shape for comparison with grains in the till. At the Adex-owned Mount Pleasant deposit, 22 bulk till samples were collected. Here, sampling was guided by previous work conducted by N. Szabo (University of New Brunswick)
and the NBDEM.
Till sampling was optimized by first collecting 200 g till samples (61 at Sisson and 50 at Mount Pleasant) and determination of W, Mo, Sn, Bi, Sn, and Cu concentrations, using a portable XRF (pXRF) spectrometer. At Sisson, anomalous pXRF concentrations match previously known NBDEM anomalies in the
glacial dispersal train extending 14 km to the SE, and correlate well with subsequent borate fusion and aqua regia/ICP-MS analyses of the <0.063 mm fraction of till (up to 815 ppm W, 65 ppm Mo, and 978 ppm Cu). Till, stream, and a suite of bedrock samples have been processed to produce
heavy mineral concentrates for assessment of indicator minerals and to characterize the indicator mineral signature of each deposit. Scheelite is abundant in both deposits, and a significant indicator mineral in till down-ice. Other indicator minerals of the Sisson deposit include molybdenite,
chalcopyrite, wolframite, Bi minerals, sphalerite, and galena. Cassiterite, topaz, beudantite, anglesite, and wolframite are indicators of the Mount Pleasant deposit.
Petrologic and geochemical examination of the Early Devonian, Evandale porphyry Cu-Mo-(Au) deposit, southern New Brunswick: geothermobarometric analysis of petrogenesis
Authors: White T , Lentz D R , McFarlane C R M
Published: June 2015

Porphyry Cu-Mo-(Au) systems associated with the granitoid rocks in eastern North American orogenic belts have been researched using current deposit models; however, relatively few studies have examined the potential for late stage fine-grained porphyritic to
aplitic intrusive phases being host to mineralization. The Evandale Granodiorite is an example of a well- preserved Mid-Devonian (U-Pb zircon age of 391.2 ± 3.2 Ma for the coarser granitoid, and 390.2 ± 1.6 Ma for the aplite) polyphase pluton intruding through deformed Silurian sedimentary
and mafic volcanic rocks of the Mascarene Basin in southern New Brunswick. The two intrusive phases have been identified as I type granites with a minor sedimentary component. The pluton is separated both petrochemically and texturally into two distinct phases. The coarser phase ranges from medium-
to coarse-grained seriate to porphyritic granodiorite to monzogranite and the later finer stage layered aplite ranges from a monzogranite to syeno-granite. INAA analysis of each phase found that the highest concentrations of Cu and Au (108 ppm Cu, and 33 ppb Au) are associated with pyrite,
chalcopyrite, and arsenopyrite within the aplitic dykes sampled, whereas concentrations of up to 6 ppm Mo were detected within the c.g. granite. Current models suggest that the transport of metals (particularly Cu and Au) are sourced from secondary two-phase fluids at shallow depths (approximately 2
kb), and is controlled primarily by Cl fugacity of the magma. Analyses of biotite phenocrysts from both the aplite and granite contain an average of 0.21 wt% Cl, which is similar to other high grade Cu-Mo-(Au) porphyry deposits. Average zircon saturation temperatures were calculated to be
818°C for the aplite and 787°C for the granitoid. Average apatite saturation temperatures were found to be 880°C for the aplite and 934°C for the granitoid phase. Hornblendeplagioclase thermometry revealed the crystallization temperature of the granite to be 642°C and
600°C for the aplite, cooler than most deposits of the same type. Al in hornblende geobarometery indicates crystallization depths of ~2.1 kb for hornblende in the aplite and ~0.7 kb for the c.g. granite. The aplitic dykes were subject to higher crystallization pressures and lower
crystallization temperatures suggesting that their formation may either be a result of pressure quenching of the melt during rapid ascent or by the sub-solidus recrystallization of the melt as pyroclastic flows.
Petrographic observations and evaporate mound analysis of quartz-hosted fluid inclusions: applications to assess metal fertility in granites
Authors: Tweedale F , Hanley J J , Kontak D J , Rogers N
Published: June 2015

The 380 Ma South Mountain Batholith (SMB), Nova Scotia, is a large (~7300 km2), contiguous, mesozonal granitoid intrusion consisting of 13 coalesced plutons hosting a variety of mineralized zones (e.g., Sn-Zn-Cu- Ag, Mn-Fe-P, U, Cu-Ag). Given the
hydrothermal nature of this mineralization, it is expected that a geochemical fingerprint of the mineralizing fluids might be preserved both petrographically and as secondary fluid inclusions (FIs) in the granites on a scale equal to or larger than the mineralized zones. In this unique study, we
investigate the possibility of integrating petrographic observations that reflect fluid:rock interaction and the chemistry of secondary, quartz-hosted FIs in samples from the SMB to assess granite fertility and also the scale of this potential vectoring tool. The protocol involved: (1) detailed
petrographic study of >500 archived samples and focused on the extent and degree of alteration (e.g., perthite textures, chlorite alteration of biotite, plagioclase alteration, percent of secondary muscovite, abundance of FI in quartz); and (2) determining fluid chemistry of quartz-
hosted FIs in >100 samples collected from a 10 x 10 km grid superimposed on the SMB. The petrographic data record highly variable degrees of alteration and the results are being used to design an alteration algorithm that can be used to map the extent of fluid:rock interaction throughout
the batholith. The chemistry of FIs, determined using the evaporate mound method, is being used as a proxy for both the mineralizing and altering fluids. At present, results for >600 mounds determined for 68 samples indicate the fluids are dominated by Na-K-Ca-Cl-F, with traces of Fe, Mn,
and S, and that two distinct types are present, one Na-rich and the other Ca-rich. Two intriguing results to date include: (1) the pervasive occurrence of F in the mound analysis with up to 40 wt% when normalized to 100%, even in samples distal to known mineralization; and (2) elevated Ca in
many samples, including those from chemically evolved, hence Ca-depleted rocks. This latter feature may reflect extensive albitization of plagioclase, hence liberation of Ca, during fluid-mediated alteration. Thus, our preliminary findings clearly indicate that mappable variation in the degree and
extent of alteration is retained in the main mineral phases of the granites and that fluid chemistry, preserved as secondary FIs in quartz, is a potential proxy for fluid:rock interaction and hence a measure of metal fertility.
Chemical fingerprinting of the Archean Côté Gold deposit: a large-tonnage, low-grade intrusion-related deposit system, Ontario, Canada
Authors: Katz L R , Kontak D J , Dubé B , Rogers J R
Published: June 2015

The Côté Gold intrusion-related Au (-Cu) deposit, in the Archean Swayze greenstone belt of the Abitibi Subprovince, is a large-tonnage, low-grade deposit hosted by ca. 2741 Ma tonalite and diorite of the Chester intrusive complex which formed in a
high-level sub-volcanic setting. The deposit contains a resource (indicated + inferred) of 8.3 M oz Au that is centered on a magmatic-hydrothermal breccia. Mineralisation occurs as disseminations or is associated with quartz ± carbonate vein arrays, and is broadly coincident with biotite,
silica-sodic and sericite alteration zones. Lithogeochemical and petrographic/SEM-EDS studies (>600 samples) across the deposit are used to assess the petrogenesis of the magmatic host rocks, distinguish between magmatic versus hydrothermal breccia, differentiate alteration types,
determine the precursor rock where alteration is most intense, and chemically fingerprint the deposit. Preliminary observations indicate the following: (1) the tonalite suite is characterised by unfractionated CN REE patterns and reflects melt generation in a low-P regime; (2) protolith rocks are
best discriminated using CaO, TiO2 and Zr/TiO2; (3) the magmatic-hydrothermal breccia is characterised by an Au-Cu-F-Te-Zn association; (4) biotite alteration, often with intergrowth of chalcopyrite, is characterised by Ba and LREE enrichment often accompanied by the presence of
allanite-euxenite-bastnaesite; (5) zones of intense sodic alteration, up to 40 m thick and approaching 10 wt% Na2O are characterised by a red-pink colour and a vuggy texture due to quartz dissolution. In thin section albite is pitted, contains abundant fluid inclusions and is mantled by clear
albite. These rocks are considered to be episyenites; (6) sericite alteration zones, up to 150 m and cutting silica-sodic alteration, are characterised by an F ± Au ± Cu association; and (7) the chemistry of biotite in the breccia unit shows a reversal in Mg# after fractionation from
diorite to tonalite (i.e., decreasing Mg#) which may indicate either injection of a new primitive melt or an oxidation-sensitive event coincident with formation of the breccia. Many of the features of the Côté Gold deposit suggest derivation of mineralisation and alteration by the flux of
high-temperature fluids enriched in K, Fe, F, LREE, CO2, and Ba, in addition to Au, Te and Cu. The association of Au-Cu mineralisation with a magmatic-hydrothermal breccia and a chemical signature that is atypical for Archean orogenic-type gold deposits indicates a possible affinity with a spatially
and temporally related intrusive centre.
Using biotite composition of the Devonian Lake George granodiorite, New Brunswick, as a case study for W-Mo-Au-Sb mineralized magmatic hydrothermal systems
Authors: Azadbakht Z , Lentz D R , McFarlane C R M
Published: June 2015

The granodioritic Lake George polymetallic deposit is located approximately 35 km southwest of Fredericton, New Brunswick. This intrusion is a metaluminous to weakly peraluminous, calc-alkaline body that shows an evolved I-type, volcanic arc affinity. Based on an
Early Devonian age determination, (412 +5/-4 Ma, zircon U-Pb) it is related to the Hakshaw granite phase of the Pokiok Batholith. The Lake George stock is cut by Hibbard stibnite -quartz veins and quartz-scheelite-molybdenite veinlets that contain significant amounts of gold. Fresh biotites from
this intrusion were analyzed at both the core and rim by electron microprobe, and along rim to rim transects by laser ablation ICP-MS at the University of New Brunswick to build an understanding of the halogens responsible for mineralization and trace element distribution within this deposit.
Biotites of this intrusion are reddish brown in colour (indicative of reduced I-type source) and mostly altered to chlorite. They usually contain apatite, zircon, titanite, ilmenite, rutile, and sulphide minerals as mineral inclusions. Temperature was calculated with the Ti-In-biotite
geothermometer, in which the results showed a variation between 583 and 745°C.
Two depths of emplacement were determined based on the Al in hornblende and biotite geobarometries confirming the porphyritic texture of this intrusion (4.3 and 1.5 km, respectively). Forming amphiboles at that depth clearly indicates a high water content of the source magma; in addition, hydroxyl
is the most dominant component of the hydroxyl site (Average 1.89 wt%) in biotites. The limited range of IV(F/Cl) values of the Lake George biotites suggested that they all equilibrated with one fluid.
Even though there is no noticeable difference in major elements from core to rims, evidence of magma evolution is recorded by biotite grains by their trace elements. For instance, Cu, Rb, Cr, K, Mo, Sn, Cs and W increase from core to rims, whereas Ba, Ni, Mn, and Li act inversely. Sb has a
negligible variation from core to rim. Interestingly, the partition coefficient (biotite/whole-rock) is significantly small for Sb, W, and Mo (main associated mineralization) with 0.06, 0.28 and 0.13 in pure magmatic biotites and increase to 0.77, 1.93 and 0.20 in more altered biotites reflecting
enrichment of these elements towards the late stage fluid.
Based on these observations, the concept of using mica composition to help identify fertile Acadian magma systems was proved; this method may be a useful tool to indicate the difference between barren and mineralized granophileelement rich systems.
Are there elephants hiding in the Jurassic of Yukon? A tectonomagmatic perspective on porphyry prospectivity
Authors: Chapman J B
Published: June 2015

Within British Columbia, Triassic-Jurassic felsic plutonic and intrusive rocks of the Stikinia and Quesnellia terranes are very much considered mp;lt;"elephant countrymp;gt;", and are spatially and genetically associated with some of the most significant porphyry
Cu-Mo deposits in North America. However, where these terranes meet and merge in central Yukon, little significant mineralization has been discovered in similarly aged felsic plutonic rocks and they host only one operating Cu mine, despite outcrop covering hundreds of square kilometres. The reasons
for this discrepancy are not clear. In order to provide assessment of the tectonomagmatic setting and porphyry prospectivity of Jurassic plutonic rocks within Yukon, 65 unmineralized samples from across the district have been analyzed for their whole rock major and trace element geochemistry, and
their zircon Ce4+/Ce3+ ratios were determined by laser ablation ICP-MS. Most samples plot within calc-alkaline to high K calc-alkaline fields within a plot of SiO2 vs. K2O, although data display significant scatter and lack any strong trend, suggestive of later disturbance of the K content. Rocks
from all sampling locations show HFSE depletions and negative Nb anomalies characteristic of suprasubduction zone environments, and commonly depleted HREE patterns are suggestive of melt generated below the depth of garnet stability. Plots of Sr/Y vs. Y and La/YbN vs. YbN both indicate significant
adakite-like and adakitic characteristics in a subset of the samples analysed. Taken together, the suprasubduction zone character and presence of adakite-like magmatism have been suggested as strong indicators of high porphyry potential in other parts of the world. Zircon Ce4+/Ce3+ values were
highly variable and ranged up to more than 2100, an order of magnitude greater than previous studies have suggested as a porphyry prospectivity threshold. However, aluminum-inhornblende data and Cu and Mo contents well below crustal abundances suggest that Jurassic plutonic rocks may represent the
mid-crustal, volatile-depleted residue of porphyry-related magmatism that has been eroded away. Future exploration for Cu-Mo-Au mineralization within Yukon will depend on understanding of tectonic uplift across the region, and better constraint on the genesis of known
mineralization.