|The Physical Object|
|Number of Pages||41|
A significant proportion of gold production from the Archean Yilgarn craton in Western Australia has come from lode- and vein-style deposits hosted in amphibolite and granulite facies metamorphic rocks rather than in greenschist facies terranes, which are the normal hosts of such deposits in Cited by: ___, and F. Robert, , A comparison of structural style and gold endowment of three Archean gold districts, Superior Province, Canada [abstract]: Bicentennial Gold 88 (Melbourne, Australia): Geological Society of Australia, Extended Abstracts/Poster Programme Volume, v. Author: K. H. Poulsen, F. Robert, K. D. Card. Deformation and gold mineralisation of the Archaean Pilbara Craton, Western Australia Richard Blewett1 & David L. Huston1 Early to late Archaean (Œ€Ma) lithostratigraphy and structures in the north Pilbara graniteŒgreenstone ter-rain are so well preserved over wide ar-eas, despite locally intense deformation, that we can link the File Size: KB. Most Archaean gold ores belong to a coherent genetic group of structurally controlled lode-deposits that are characteristically enriched in Au with variable enrichments in Ag, As, W, Sb, Bi, Te, B and Pb, but rarely Cu or Zn, and are surrounded by wallrock alteration haloes enriched in K, LILE and CO 2, with variable Na and/or Ca ce from the Yilgarn Block of Western Australia.
Abstract. Lode gold deposits are one of the most characteristic features of Archaean greenstone belts within granitoid-greenstone terranes, with major deposits situated in most major cratonic areas (e.g. Australia, Brazil, Canada, India, South Africa, Zimbabwe: . Three major gold deposits, Matandani, Kukuluma, and Area 3, host several million ouncez (Moz) of gold, along a ~5 km long, WNW trend in the E part of the Geita Greenstone Belt, NW Tanzania. The deposits are hosted in Archaean volcanoclastic sediment and intrusive diorite. The geological evolution of the deposits involved three separate stages: (1) an early stage of syn-sedimentary extensional. Australia Gold Mining Areas – State-by-State Clickable Map The biggest gold nuggets in the world have almost all come from Australia. It seems that just about every part of the country has produced gold, and there are still some amazing discoveries being found by prospectors here every year. 1. Introduction. The genesis of vein-type to disseminated gold deposits, broadly classified as orogenic gold deposits (Groves et al., , Goldfarb et al., ) has remained genetic models for these deposits were evaluated in a recent review by Goldfarb and Groves ().Much attention has been focused on the source of auriferous fluids.
THIS Gold in volume is organized around a classification of hypogene gold deposits that emphasizes their tectonic setting and relative time of formation compared to their host rocks and other gold deposit types (e.g., Sawkins, , ; Groves et al., ; Kerrich et al., ).The temporal division of orogenic gold deposits into Archean, Proterozoic, and Phanerozoic follows closely the. PDF | On Jan 1, , Susan E Ho and others published GOLD DEPOSITS OF THE ARCHAEAN YILGARN BLOCK, WESTERN AUSTRALIA: NATURE, GENESIS AND EXPLORATION GUIDES Constraints on genesis of primary gold. In typical vein-type deposits, such as those of the Southern Abitibi Greenstone Belt of the Archean Superior Province of Canada (), the total reverse separation across the faults and shear zones hosting the gold mineralization is relatively low, in the order of a few hundred metres, although the vein systems can be of considerable vertical extent (>2 km). The Archaean Superior and Slave Cratons in Canada contain 14 ‘world‐class’ gold deposits (i.e. > t Au). Most of these occur in greenstone belts, in spatial association with major fault zones, and a few in turbidite sedimentary sequences.