AndreaBozzo/ceres-open-data-index huggingface dataset:
Late Wisconsinan McConnell glaciation of the Whitehorse map area (105D), Yukon.

Ice accumulations in the Coast Mountains of southwestern Yukon and the Cassiar Mountains of south-central Yukon during the late Wisconsinan were responsible for glaciation of the Whitehorse area. Cirques in the Coast Mountains likely supported the first glaciers that advanced out of the mountain valleys ahead of the more distal Cassiar accumulation. Glacial maximum is characterized by topographically unconstrained ice flow trending northwesterly over most of the map area. Ice thickness over the city of Whitehorse exceeded 1350 m during full glacial conditions. Deglaciation is characterized by frontal retreat punctuated by periods of dynamic equilibrium and readvances. Differential retreat of the Cassiar and Coast Mountain ice lobes enabled the Cassiar lobe to penetrate, and at times readvance, up-gradient into Coast Mountain valleys. This pattern of deglaciation created ice dams and a series of proglacial lakes that submerged valleys under as much as 300 m of meltwater.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary bedrock geology for NTS 95D/6 (Otter Creek area), southeast Yukon.

The Otter Creek area contains sedimentary and volcanic strata of the ancient North American miogeocline: Neoproterozoic to Lower Cambrian shale (Narchilla Formation) and siltstone (Vampire Formation); Late Cambrian to Middle Ordovician argillaceous to massive limestone (Rabbitkettle Formation) and dolostone (Sunblood Formation); Cambrian to Ordovician basalt and associated diabase; Silurian to Devonian MacDonald carbonate platform strata (unit SDc-south) and Selwyn basin shale (Road River Group-north); and thinly bedded silty shale likely of the Devonian to Carboniferous Besa River Formation. The rocks are deformed by six mappable north-trending, east-verging, asymmetric, macroscopic folds with amplitudes of 500-2000 m. Argillaceous and silty units contain a pervasive, axial-planar slaty cleavage. Shortening caused by the folding is about 25%. The Narchilla Formation is structurally emplaced upon Upper Cambrian-Devonian sedimentary rocks on the western margin of the map area, along an east-verging thrust fault with unknown displacement. Late northeast-striking normal faults preserve younger stratigraphic units to the south. Deformation is poorly constrained to the Mesozoic-Cenozoic Cordilleran orogeny.

Four epigenetic(?), stratabound zinc±lead±barite deposits and showings occur at the stratigraphic contact between massive limestone and argillaceous limestone within the Rabbitkettle Formation. Two occurrences contain significant smithsonite, suggesting supergene enrichment of primary sulphide mineralization. Previous lead-isotope studies of galena from the Mel deposit suggest that the age of primary mineralization is Devonian. Primary mineralization cannot be definitively classified within existing genetic deposit models, but is most consistent with manto replacement or Mississippi Valley-type deposit models.

Organization: Government of Yukon | Gouvernement du Yukon
Updates to the Yukon Geological Survey’s mineral potential mapping methodology

This paper serves as an update to an earlier paper published by the Yukon Geological Survey: New mineral potential mapping methodology for Yukon: case studies from the Beaver River and Dawson regional land use planning areas (Bullen, 2020). Since the release of the earlier paper, a number of the methods have been modified, and new techniques introduced. These are incorporated into this update paper — the reader is referred to the earlier paper for details of the method itself.
Mineral potential maps have thus far been completed for the Beaver River watershed, and the Dawson, Teslin, Na-Cho Nyäk Dun, and Ross River regions. There have been significant updates made to the mineral potential mapping method:
1. Modifications to buffer distance and factors (these are an important fuzzy logic (i.e., non-Boolean) component of the mineral potential mapping process) to enhance mapping outcomes.
2. The introduction of an in-house generated, machine learning algorithm (unsupervised, clustering-type) to classify mineral potential in order to remove the potential for human bias. The method replaces the statistical, areas-under-the-curve approach used previously.
3. A new method for delineating anomalous stream sediment data based on the lithological makeup of each watershed basin. The method computes and compares expected assay values to actual assay values, with values exceeding a certain threshold taken as anomalous. The previous method did not take lithology into account, relying on simple percentile methods only, and was considered insufficiently robust.
4. A new method for categorizing mineral potential confidence. Mineral potential maps produced by the Geological Survey contain measures of bedrock mapping confidence to facilitate land use planning. The updated method is significantly more robust than that used previously.
5. Revisions to the map legend to account for the new, machine learning-based mineral potential categorization methodology.
6. Revisions to the map colour scheme to make them colour blind-safe.

Organization: Government of Yukon | Gouvernement du Yukon
2019–20 Supplementary estimates no. 2

Supplementary estimates no. 2 for the Government of Yukon 2019–20 Budget. 
This document was prepared by the Department of Finance under the direction of Management Board for the 3rd Session of the 34th Legislature, Yukon Legislative Assembly. March 2020, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary geology of the southern Semenof Hills, central Yukon (105E/1,7,8)

The volcano-sedimentary rocks of the Semenof block of central Yukon have not been closely studied in the past. Recent bedrock mapping in the southern Semenof Hills highlights the presence of possibly two exceptionally well preserved, undeformed and unmetamorphosed volcanosedimentary sequences of Late Paleozoic age. The main sequence is composed, from bottom to top, of (1) 2- to 3-km-thick thinly bedded fragmental volcanic rocks interbedded with few limy intervals, (2) thick massive plagioclase- and clinopyroxene-phyric basaltic lava fl ows with clastic intervals, and (3) a 1- to 3-km-thick volcanic conglomerate. The other sequence, of lesser extent, consists of
(1) a thin quartz-porphyritic felsic volcanic unit, less than 50 m thick, (2) 2- to 3-km of massive to pillowed fine-grained basaltic lavas, and (3) 100 m of fossiliferous Upper Carboniferous limestone. These two sequences sit in faulted contact on ~2 km of a deformed clastic sequence of unknown affinity.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary observations from four reduced intrusion-related gold deposits, Selwyn basin, Yukon

Host rocks, veins and alteration in reduced intrusion-related gold (RIRG) deposits display similar features and distribution across the Tombstone gold belt (TGB). The primary intrusive rocks hosting gold at these deposits are felsic to intermediate, silica-saturated, alkalic to calcic, metaluminous to weakly peraluminous magnesian (calc-alkaline) granodiorite, quartz-monzonite, monzonite and syenite. Preliminary field and petrographic observations suggest that distribution of veins, vein textures, and their correlative vein selvedge alteration assemblages show similar distribution patterns to porphyry deposit models on a more spatially restricted but observable (drill core) scale. At each of the deposits examined on four properties, sulphide-poor (3–5% sulphide minerals) quartz veins were commonly observed proximal to the causative intrusion, whereas sulphide-rich (>10% sulphide minerals) veins tend to be more distal, though are commonly observed using the same fluid pathways as earlier veins. Early sulphide-poor quartz veins commonly exhibit potassic and locally sodic alteration in vein selvedges, whereas sulphide-rich veins typically coincide with phyllic (sericitic) alteration. Sinuous veins with diffuse boundaries suggest emplacement within a higher temperature ductile regime closer to the centre of the mineralizing intrusion, whereas sharp, straight-sided quartz sulphide-rich veins are more typical and emplaced within a moderate temperature brittle regime in the intrusion carapace and hornfelsed country rocks.

Organization: Government of Yukon | Gouvernement du Yukon
2011–12 Supplementary estimates no. 1

Supplementary estimates no. 1 for the Government of Yukon 2011–12 Budget. 
This document was prepared by the Department of Finance under the direction of Management Board for the 1st Session of the 32nd Legislature, Yukon Legislative Assembly. December 2011, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Shaded Magnetic First Vertical Derivative, Yukon Territory, NTS 106L/NE-NW

This map was compiled from data obtained as a result of an aeromagnetic survey carried out by Fugro Airborne Surveys using a Cessna Caravan aircraft. A 0.005 nT sensitivity split-beam cesium vapour magnetometer was mounted in the tail boom of the survey aircraft. 
The survey operations were carried out from March 7 to May1, 2003. The nominal traverse line spacing was 800 m with control lies at 2.4 km spacing at a nominal terrain clearance of 200 m. A preplanned flight surface was calculated for this survey to minimize the control line and traverse line altitude differences. Flight path was recovered using a post flight differential Global Positioning System, combined with a vertically mounted video camera.
After editing the survey data, the intersections of the control and traverse lines were established and differences in the magnetic values were computer analysed and manually checked to obtain the level network. The levelled total field values were then interpolated to a 200 m grid. The International Geomagnetic Reference Field has not been removed from the magnetic total field.

Organization: Government of Yukon | Gouvernement du Yukon
Property-scale classification of surficial geology for soil geochemical sampling in the unglaciated Klondike Plateau, west-central Yukon

Recent mineral discoveries made by soil geochemical sampling along ridges and spurs prompted an increase in exploration in the unglaciated Klondike Plateau of west-central Yukon. Extensive and detailed soil sampling campaigns were extended across hillsides and into valleys, where eolian deposits, periglacial processes, and mass movements complicate the collection and interpretation of geochemical data. In support of exploration efforts, property-scale (1:20 000) surficial geology mapping was completed for several exploration projects to provide more detailed insight than is available in regional-scale (1:50 000) mapping. The culmination of this mapping work is the identification of 12 ‘landform-soil types’ (LSTs) that exhibit recognizable and repetitive patterns in the field and in aerial photographs. The suitability of each LST for different soil geochemical sampling methods and interpretation strategies depends on its soil depth, permafrost depth, surface organic thickness, loess thickness, transport distance, and type of geochemical anomaly.

Organization: Government of Yukon | Gouvernement du Yukon
Ultramafic nickel-bearing magmas of the Nadaleen River map area (106C/3) and associated listwaenites: New exploration targets in the Mayo Mining District, Yukon

Pentlandite-bearing serpentinized ultramafic flows with a komatiitic composition have been identified within volcano-sedimentary stratigraphy in the Nadaleen Range. Associated listwaenites or silica-carbonate-fuchsite-altered serpentinites carry locally significant gold, copper, nickel and cobalt values. The occurrence of laterally extensive ultramafi c units at the northern edge of the Selwyn Basin remains difficult to explain within the current scope of geological knowledge in the area. However, it represents a new style of exploration target for copper-nickel-bearing massive sulphide deposits, as well as listwaenite-associated gold.

Organization: Government of Yukon | Gouvernement du Yukon
Report on the Detailed Mineral Assessment of the Proposed Scottie Creek Special Management Area, Yukon

Yukon Government and the White River First Nation agreed to create a 512.4 square km Special Management Area, designated as a Habitat Protection Area along Scottie Creek. The purpose of this report is to present the results of the detailed mineral assessment of an area of 1248 square km that encompassed the proposed Special Management Area. This enlarged area was included to provide some relative context for the assessment. The proposed area has no advanced mineral properties. The assessment is based on the mineral potential of the geology as identified by a panel of industry experts. Results shown on the detailed mineral potential map indicates that the southern portion of the proposed Special Management Area has the highest relative mineral potential. This area is underlain by Paleozoic aged metamorphosed sedimentary and volcanic rocks and has potential for hosting economic sedex or VMS type base metal deposits. The plutonic rocks of the northern portion of the proposed Special Management Area have potential for gold and porphyry type deposits. Further evaluation work is recommended for the higher elevations where there is potential for rock formations to outcrop.

Organization: Government of Yukon | Gouvernement du Yukon
The Goz Creek zinc deposit, Yukon Territory

In June 1973, abundant dolostone rubble and stream debris mineralized with sphalerite was found in several tributaries of Goz Creek in a remote part of the eastern Yukon near the headwaters of the Bonnet Plume River. Sediment from these streams also contained concentrations of up to 7,700 ppm zinc and 360 ppm lead. These indications were subsequently traced to extensively mineralized outcrops of carbonate strata on east trending ridges about six miles in length. Twenty closely spaced diamond drill holes were bored in the general vicinity of the most promising outcrops in 1974 to determine the continuity and form of the richest mineralized zones. In 1975 a further 35 holes were bored on a wider spaced pattern to provide an estimate of the tonnage potential and overall distribution of the mineralization. The total length of the fifty-five drill holes is 20,448 feet. The Goz Creek prospect, owned by Barrier Reef Resources Limited, became conspicuous because of spectacular high grade outcrops which were easily examined by many geologists who visited the area. Also, the presence of large amounts of silica and smithsonite were considered unusal relative to other known carbonate hosted zinc and lead deposits in western and northern Canada.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary observations on the geology of Tay Mountain Area (parts of NTS 105K/12 and 13, 105L/09 and 16), central Yukon

Regional mapping north and west of Faro is aimed at improving knowledge of the geologic history of the area and at elucidating the host stratigraphy and structures of both precious and base-metal occurrences. The southern part of the Tay Mountain area is underlain by metamorphosed lower Cambrian to Silurian Selwyn basin strata. These are thrust northward over Silurian to Triassic clastic, carbonate and volcanic rocks. The entire succession is intruded by mid-Cretaceous granitic rocks of the Tay River plutonic suite. The area is deformed by folding and north-verging thrust faults and by both east-west and north-south oriented normal faults. There is evidence that north-verging thrust faults are reactivated Devonian normal faults that formed in response to regional extension and controlled the deposition of the Earn Group.
Selwyn basin strata, which are age-equivalent to the Anvil Mine host stratigraphy, crops out extensively south of the Twopete thrust fault. The end of a northwest-trending belt of silver-bearing occurrences is located at Mount Menzie. Folded chert in proximity to calcareous rocks and granitic intrusions are common features of the silver showings in the area.

Organization: Government of Yukon | Gouvernement du Yukon
2003–04 Supplementary estimates no. 3

Supplementary estimates no. 3 for the Government of Yukon 2003–04 Budget. 
This document was prepared by the Department of Finance under the direction of Management Board for the 1st Session of the 31st Legislature, Yukon Legislative Assembly. October 2004, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
A summary of Rock-Eval data for the Bonnet Plume Basin, Yukon: Implications for a previously unrecognized oil play

Previous studies based on regional geology, sediment type and stratigraphic thickness, concluded that the Bonnet Plume Basin in northeastern Yukon has gas potential, but insignificant oil potential. However, these studies were not based on samples collected from within the basin. For this study, in total, 226 rock samples collected from outcrop and drill core throughout the Bonnet Plume Basin were analyzed by Rock-Eval 6 programmed pyrolysis and combustion to assess the petroleum source-rock potential of the strata. The results indicate that the Road River Formation (Cambrian to Devonian) has no source rock potential, but the Bonnet Plume Formation (Cretaceous to Tertiary) has gas and perhaps oil potential. Potential oil generation in the Bonnet Plume Formation is attributed to the occurrence of liptinite-bearing coal and previously unrecognized, siliceous, oil shale. A hydrocarbon-rich tar associated with a naturally burning coal seam was also discovered in the Bonnet Plume Formation.

Organization: Government of Yukon | Gouvernement du Yukon
Regional stream sediment geochemical data, Kluane Lake area, southwest Yukon (NTS 115F & G)

This data package contains results for parts of the Kluane Lake survey area (NTS 115F and 115G). This information has been provided in a variety of digital formats. PDF files include survey descriptions and details regarding methods, analytical data listings and summary statistics. Raw digital data of original field and analytical information plus new reanalysis results are included in Microsoft®Excel (XLS) format.

NGR surveys were originally conducted in the Kluane Lake map area in 1986 and covered parts of NTS map sheet 115F (east ½) and 115G (Geological Survey of Canada, 1987). Stream sediment and water samples were collected from a total of 1005 sample sites. The work was undertaken by the GSC in conjunction with the Department of Indian Affairs and Northern Development, and the government of Yukon under the Canada-Yukon Mineral Development Agreement (1985-1989).

As part of the 2014 Yukon Database Upgrade Project, original material collected from the 699 sample sites were selected for reanalysis. Samples from 306 sites located in protected areas were not included. Representative 2 gram splits were successfully recovered from a total of 985 samples. Due to a deficiency of available material, 28 samples were not recovered. The samples were delivered to Bureau Veritas Commodities Canada Ltd. (Vancouver) and were analyzed by an ultra-trace aqua-regia digestion ICP-MS package for 53 elements.

Organization: Government of Yukon | Gouvernement du Yukon
Distal micro-tephra deposits in southeast Alaskan peatlands

Volcanic ash (tephra) provides a valuable tool in palaeoenvironmental research. Traditionally, the main emphasis in tephra studies has been on layers which are visible to the naked eye. Recently a large body of work in Europe has been established investigating microscopic tephra layers. Microscopic methods have allowed a massive expansion of the known limits of tephra deposition; however, they have rarely been used elsewhere in the world. This report summarizes the first use of these methods in northwestern North America. Five peatland sites in southeastern Alaska were cored and analysed for tephra. A total of 14 significant layers were recovered, representing a minimum of 4 different tephras. While it is not yet possible to identify the source of these layers, these results are significant as they show that microscopic methods may prove a valuable tool enabling an expanded tephrochronology and a better understanding of volcanic impacts in the region.

Organization: Government of Yukon | Gouvernement du Yukon
A brief glimpse into post-Soviet placer mining

The Ural mountain province of Russia is one of the richest and mineralogically diverse regions in the world, with world-class deposits of platinum and PGEs, gold, copper, emeralds, rubies and malachite. The central Ural mountains are well-known for some of the largest and richest placer platinum and gold deposits in the world, and are the location for the largest gold nugget ever found in Russia (79.5 pounds) and the largest platinum nugget ever found in the world (13 pounds)

Organization: Government of Yukon | Gouvernement du Yukon
A-type granite plutons and tin skarns in southeast Yukon: Mindy prospect and surrounding granite of 105C/9

In the southeast Yukon, immediately southwest of the mid-Cretaceous Cassiar suite plutons,is a northwest-trending suite of anorogenic one-mica granites called the Seagull suite. This suite is comprised of the Seagull and Hake batholiths, Ork and Thirtymile stocks and an un-named intrusion to the northwest. These B and F enriched granites are associated with various forms of tin mineralization, including skarns. The Mindy prospect in the Thirtymile Range contains a variety of metasomatic silicate and borate and fluoride minerals. Tin (Sn) mineralization is found as cassiterite and borate mineral phases. Mapping has shown that faulting active during metamorphism-metsomatism controlled the distribution of the skarn mineralization. Both mineral chemistry and structural control of mineralization have a significant effect on the economic potential of the Mindy prospect.

Organization: Government of Yukon | Gouvernement du Yukon
The Whitehorse Copper Belt - An annotated geology map

This publication is a field guide to the geology and mining history of the Whitehorse Copper Belt. It is designed to assist Whitehorse residents and visitors in exploring this fascinating area. Sheet 1 is a geological map with a list of suggested stops, while sheet 2 provides specific descriptions of many mineral occurrences. Stops are numbered roughly from north to south on this map, and are grouped according to their geographic location and access routes on sheet 2.

Organization: Government of Yukon | Gouvernement du Yukon
First vertical derivative of the magnetic field, McQuesten Aeromagnetic Survey, NTS 115I/13 and 115I/14, Yukon

Map of the first vertical derivative of the magnetic field derived from data acquired during an aeromagnetic survey carried out by Goldak Airborne Surveys from November 19, 2008 to February 19, 2009. The data were recorded using a split-beam cesium vapour magnetometer mounted in the tail boom of a Piper Navajo aircraft.

Organization: Government of Yukon | Gouvernement du Yukon
GeoFIELD v.2.2 - Data management and map production for the field geologist

GeoFIELD is a data management system that is designed to facilitate practical data entry and the production of geologic maps while in the field. GeoFIELD writes data to a Microsoft Access 2000 database and allows digitizing and plotting of station locations and structural data in an AutoCAD Map 2000 drawing using a Visual Basic for Applications interface. GeoFIELD provides a user-friendly interface within a familiar Windows environment. Its extensive picklists are easily customizable and ensure consistency and quality control during data entry. The widespread availability and easy customization features of Microsoft Access make GeoFIELD a flexible application that can be adapted to varying needs. In addition, Microsoft Access provides the ability to easily build complex database queries and generate reports. GeoFIELD can also be used successfully with a handheld device as well as with common GIS applications such as ArcGIS 8.x.

Organization: Government of Yukon | Gouvernement du Yukon