Adaro Indonesia planned to develop a multi-seam deposit of low-ash, low-sulphur, bituminous coal along an 18 km strike length. The planned mining depth of 300 m would extend some 280 m below the water table. As is typical for coal mines in Indonesia, the presence of uncemented sands and mudstone required careful design of the low and high walls
Jan 01, 2001 · The lithologies that contain the coal deposits are Permian in age and assigned to the Karoo Supergroup (SACS, 1980; Johnson et al., 1996), and Karoo-type deposits are known from all of the countries described in this paper ().The Karoo basin in South Africa is regarded as the type-locality for the southern African coals (Cadle et al., 1993).This is somewhat misleading because although the
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On August 22, soldiers of the FAA and elements from private security company Kadyapemba attacked a group of approximately 100 artisanal diamond miners in North Lunda, leading to the death of 39-year-old Bernardo Miguel, online news outlet Maka Angola reported
Restricted to northeast section of Martinsburg outcrop belt. Thermally metamorphosed near intrusive bodies. Grades along strike to the southwest into Ramseyburg Member by decrease in average grain size, absence of shale rip-ups, and lack of siliceous cement
Jul 01, 1974 · The name comes from a series of United Mine Workers strikes and labor-management battles which ended in a gunfight between deputized mine guards and miners on …
Sep 10, 2018 · The Main Zone is mineralized over a strike length of 600 m and extends to at least 650 m below surface with an average width of 3.8 m. All historic production originated in this zone. Pyrite is the predominant sulphide mineral, followed by, in decreasing abundance, sphalerite, chalcopyrite, galena and …
Nov 02, 2009 · American right hand rule: Looking to the strike direction, the bed dips to the right.In our example, that would fit with 000/45. So, looking to the north, the bed dips to the right, to 090 (east). British right hand rule: The thumb of the right hand indicates the dip direction, and the heal points to the strike direction.So in our example, we would record the orientation as 180/45
Dec 15, 2007 · Sample AF3, chips from a percussion hole, comes from a sandstone between Coals 1 and 2, and sample AF4 from an outcrop of sandstone with shale bands between Coals 2 and 3 (Faure et al., 1996), some 10 m above AF3. The sandstone was deposited on a western paleoslope in the middle of the Kalahari (Zimbabwe–Limpopo–Kaapvaal) Craton
The mineralisation is hosted within a sheared, inter-layered, conglomeratic sandstone of the palaeoproterozoic age (2.5 billion to 1.6 billion years) overlying the metamorphosed basement. The mineralisation is open at depth and along strike. The deposits contain oxide ores, as well as transition and fresh un-weathered material
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