Tons of gold .. Historic achievement ..! | India imports 101 tonnes of gold in m
Channel: LATEST INFO TECH
Date: 2022-06-12

http://destyy.com/edtPl8

Implications for Gold Mineralisation in the Gopalpur Area, Keonjhar District, Orissa: A New Discovery
Manaswini Kar* and Venkatesh AS

Department of Mineral Exploration, Indian School of Mines, Dhanbad, India
*Corresponding Author: Manaswini Kar, Department of Mineral Exploration, Indian School of Mines, Dhanbad, India, Tel: 0326-2235001, 0326-2235004, Email: manaswini_kar1986@yahoo.com

Received: 31-Aug-2015 / Accepted Date: 21-Sep-2015 / Published Date: 30-Sep-2015 DOI: 10.4172/2157-7617.1000304
Abstract

Gold deposits of Orissa can be broadly divided into three broad zones of Keonjhar, Mayurbhanj, and Sundargarh districts. In Keonjhar district gold occurrences have been reported from Saleikana-Dimirimunda-Kardangi sector in Telkoi block and Gopalpur, Gajipur, Adal, Kushkala sector in 

Bansal block. Out of these localities, the Gopalpur area seems to be the most promising one. The Precambrian metavolcanics of Gopalpur in the Keonjhar district host auriferous quartz vein. In this area, detailed exploration is carried out by GSI in 1:10000 scales with pitting, trenching, drilling, geological mapping and geochemical survey. The Quartz veins are found in the metavolcanic being emplaced along the prominent schistosity planes.

 Three sub-parallel sets of quartz veins with high angle dip are delineated. Gold mineralization is associated with the sulphides and oxides in quartz veins, basalts and laterites and ultramafic and is exposed on the surface as well as in underground trench faces. Gold occurs in refractory form and in free grains within quartz and has an intimate association with pyrite and chalcopyrite and oxides (hematite, goethite, magnetite and cuprite) in the form of refractory gold. 

The gold content of the mineralized quartz veins and lateritic wall rocks varies widely from 1 to 9 ppm. The fluid inclusion study shows the temperature ranges from 250°C to 37°C and the gold deposit is of mesothermal type. The gold is formed by the remobilisation from sulphide-bearing minerals to oxide-bearing minerals. From the mineralogical and lithological assemblages, the Gopalpur prospect can be compared with an Iron-formation-hosted vein and disseminated deposit that is the Homestake gold deposit.
 View PDF Download PDF

Keywords: Basalts; Eastern India; Gold, Iron ore group; Ultramafic rocks; Vein quartz
Introduction
India is the world’s largest consumer of gold in tonnage terms that is 

about 713 tons in 2008; hence there is an urgent need in augmenting gold exploration programmes in unexplored areas other than the southern Indian greenstone belts.
Review of the previous work

In 1977-78, at the time of field season of the Geological Survey of India, Gopalpur is explored in detail with a 1:10,000 scale of mapping. Systematic cutting of trenches across the vein quartz at a strike interval of 30 metres was done to know the depth, and continuity of the auriferous vein. About 90 samples were collected from the trench walls at 5 m intervals. 

Geochemical sampling was done in Gopalpur covering an area of 1.47 km2. Eighteen boreholes have been drilled by the Geological Survey of India in the area with their inclination angle ranging between 45o followed 

About Us    https://bit.ly/3GUPFOa  
Contact: +919942258153               kvk.subadhra@gmail.com                
Thank You Very Much for Sharing YourValuable Thoughts 

https://58c8ag45w581bugh2c-8eb2vcn.hop.clickbank.net