The Brown-McDade deposit was the first vein system discovered in the Mount Nansen camp and has produced approximately 34,000 ounces (1058 kg) of gold and 131,000 ounces (4,075 kg) of silver from 225,000 metric tonnes of ore since production began in November, 1996. Production rates have varied since the mill start-up but the carbon-in-leach (CIL) plant is currently operating near capacity at 700 metric tonnes per day. Mining at the Brown-McDade open pit has exposed two separate and distinct deposit types. The first type is gold-silver vein mineralization hosted by a massive feldspar porphyry dyke. These fine-grained quartz-sulphide veins and vein breccia are enclosed by silicified and/or intensely clay-altered brecciated feldspar porphyry. The feldspar porphyry dyke has intruded along an igneous-metamorphic contact that has been mined over a strike length of 50 m in the southern portion of the pit. The second deposit type that occurs at the north end of the pit consists of a siliceous, sulphide-rich breccia in a pipe-like structure hosted by metamorphosed carbonate and clastic rocks of the Nasina Assemblage. The pipe is elongate in plan with a high-grade core approximately 15 m wide and 25 m long surrounded by a low-grade envelope consisting of quartz-sulphide stringers in a silicified breccia. The deposits are separated by a northeast-striking fault which truncates and offsets the main vein-dyke mineralization. The ore is composed of fine-grained quartz and sulphides in narrow veins or as matrix to a breccia of silicified and pyritized wall rock fragments. Unoxidized ore contains dark grey silica and pyrite, arsenopyrite, sphalerite, galena, sulphosalts, bornite, stibnite and chalcopyrite. Gold is genetically related to the pyrite phase of the mineralization and occurs as 5 to 50 micron-sized inclusions in pyrite grains. Oxidation of sulphide minerals extends to depths of up to 70 m and a large portion of the gold grains have been exposed by oxidation of the sulphides and post-depositional cataclastic fractures in the pyrite. The silver mineralogy is not as well understood but appears to be related to the base metal sulphide mineralization.

This report deals with the results of 25,000 ft. of boring over an area of 15 sq. miles. Twenty-six coal seams were identified and named. Total reserves of all seams with band-free thickness greater than 4.0 ft. are 200,000,000 tons. Net open-cut reserves (to 9:1 ratio) of 7,500,000 tons over an area of 400 acres were tested and defined on four seams. All work in the Howick Area was done in the period March, 1952, to June, 1953.

한국지질자원연구원에서 조사한 1:2.5만 축적의 탄전 지질도이며, 트랜치위치의 .shp 정보가 있습니다.- 데이터 사용법 -* 본 데이터를 사용하려면 상용프로그램인 ArcGIS S/W나 오픈 소프트웨어인 QGIS 프로그램( https://qgis.org/en/site/forusers/download.html에서 다운)을 사용하면 됩니다.* asc파일은 각 셀의 값을 나타내는 텍스트 파일로 텍스트 에디터나 엑셀에서 불러올 수 있습니다.* 전문적 프로그램 활용이 어려운 일반 사용자들을 위해 이미지파일을 제공합니다.- 데이터 확장자 설명 -geotiff : 지리 참조 정보가 포함되어 있는 이미지 파일형식의 데이터 입니다. (.tiff)grid: 각 격자에 고유한 값이 저장되어있는 Esri사 고유의 래스터 파일형식의 데이터입니다. (.grid)ASCII: 래스터의 속성을 정의하는 헤더 정보와 공백으로 구분 된 각 셀의 값으로 래스터를표현하는 텍스트 파일이며, 프로그램간 자료 호환을 위해 만들어진 파일입니다. (.asc) 지형, 지질 등 지표면 및 지하 현황 파악 및 분석을 위한 기초 데이터산사태, 홍수, 지진 등 자연재해 분석을 위한 기초 데이터지하수, 광물자원, 골재 등 지하자원 개발을 위한 기초 데이터도시 및 토지 개발, 도로, 철도 적지 선정 등을 위한 기초 데이터지형 및 지질과 관련된 인공지능 비즈니스 적용을 위한 기본 데이터로 활용엔지니어링 업체, 대학 및 연구기관의 실무 및 교육/연구용

The Copper Mine Creek deposit is the only manganese deposit worthy of attention in the Ravensthorpe area. It is a bedded deposit enriched by supergene water, and has an estimated tonnage of 6,000 tons per vertical foot. The ore is in a number of beds interspersed with an approximate equal footage of decomposed schist. Two shafts indicate ore down to 40 feet, and it is thought that it may continue well below that level.

A brief geological examination of this deposit was made by the writer and D.N. Smith between 18th and 20th June, 1952. The deposit had been previously examined in 1951 by J. Daly of the Geophysical Section, Bureau of Mineral Resources, and by J.C. Lloyd of the N.S.W. Mines Department and the results of their investigation were available for reference. The radioactive area examined during the present investigation was an area of about 1/4 square mile of the volcanic flow in the north-eastern corner of portion 39. Samples of the quartz veinlets and of the volcanic rocks were collected, and tests carried out with the Laboratory Geiger counter in Canberra indicate that both are radioactive and that the radioactivity is slightly greater in the sample from the quartz veinlets.