... grade metamorphism and polyphase deformation. It is the host to world class base metal sulphide resources that have been mined for more than a century. Most of these mines are no longer in production such that the Cu-Pb-Zn-Ag mines in the Aggeneys-Gamsberg Ore District (A-GOD), with a total output...

...), which is an Environmental Mapping and Analysis Program. The Aggeneys Cu-Pb-Zn deposit, situated in the arid north western part of South Africa, represents a unique field laboratory for testing these new tools. Here spaceborne hyperspectral data covering the Swartberg, Big Syncline and Gamsberg area were...

... is effectively fractionated from the base metal sulphide facies at Gamsberg. It forms a considerable industrial grade barite deposit in the eastern parts of Gamsberg (approximately 6 Mt) that has sporadically been mined as small-scale opencast operations. At Gamsberg, metasedimentary facies are relatively...

...G.B. Motloba; K.S. Viljoen; D.H. Rose; A.J.B. Smith Abstract Big Syncline is one of the few unexploited deposits of the Aggeneys-Gamsberg Ore District of the Northern Cape Province of South Africa and comprises Zn > Pb > Cu mineralisation. Future exploitation of this deposit requires a good...

...). Geological Society of South Africa . Rozendaal , A. and Stumpfl , E.F. ( 1984 ) Mineral chemistry and genesis of Gamsberg zinc deposit, South Africa . Institution of Mining and Metallurgy Transactions (Section B: Applied Earth Sciences) , 93 , B161 – B175 . Smeds , S.-A. , Uher...

... brown in thin section and display slight pleochroism. The Gamsberg Zn–Pb deposit (150 Mt at 7% Zn and 0.5% Pb) is situated near the Northern Cape mining town of Aggeneys, in the central part of the Namaqua Province of South Africa ( Fig. 1a ). Country rocks in the area belong to the late...

...Fig. 1. A) Locations of the major deposits of the Aggeneys-Gamsberg ore district, near the mining town of Aggeneys. B) Location of the district in the northwest of South Africa. ...

... in Namibia, a new shaft and decline at Aggeneys to exploit the Broken Hill deep orebody, and the blending of ore from Swartberg and Gamsberg into the Aggeneys run of mine. As a consequence of new research results and timely reviews being presented at the Geocongress held in Windhoek during July 2002...

... and Gamsberg deposits related to the sulphide ore bodies. Hoffmann (1993) investigated the petrology, geochemistry and metamorphism of the Lower Ore Body at the Broken Hill Mine. The economically significant Ore Schist Formation ( Ryan et al. , 1986 ; Lipson, 1990 ), containing the massive sulphide...

... large bodies of Aroams Gneiss occur northeast of the mining district; one is shown in Figure 1 and the other some lies 40 km northeast of Gamsberg, between Pofadder and Pella, where it intrudes Orange River Group metavolcanic rocks. There is general agreement and some support from whole-rock dating...

... to the Broken Hill Mine. Consequently we used Lipson’s (1990) terminology as this was/is used at the mine and related directly to the succession there ( Bailie et al ., 2007a , pp. 62–63). We noted (in the abstract and summary, p. 83) that the ages obtained relate to the Bushmanland Group in the Aggeneys...

... and their tectonostratigraphic context. Published constraints on the maximum age of the ores from detrital zircon dating are 1 285 ± 14 Ma (n=4, Gamsberg ore), 1 215 ± 18 Ma (n=6, Wortel Formation) and a tentative 1 118 ± 33 Ma (n=3, Hotson Formation at Black Mountain). The ore is older than the 1 130 ± 35 Ma Koeris Formation...

... West Africa . Unpublished Ph.D. thesis, University of Witwatersrand , South Africa , 164 pp. Rozendaal , A. and Stumpfl , E.F. , 1984 . Mineral chemistry and genesis of Gamsberg zinc deposit, South Africa . Transactions of the Institution of Mining and Metallurgy (Section B) , 93...

... deposits . Canadian Institute of Mining Bulletin , 104 – 112 . Rozendaal , A. ( 1986 ). The Gamsberg zinc deposit, Namaqualand District . In: C. R. Anhaeusser and S. Maske (Editors), Mineral Deposits of Southern Africa, Geological Society of South Africa , 1477 – 1488...

... with iron formations at Aggeneys and Gamsberg ( Joubert, 1986 ). The depositional environment is interpreted as an intracontinental rift characterised by bimodal volcanism and shallow marine clastic and exhalative sedimentation in a passive margin setting ( Moore, 1989 ; Lipson, 1990 ; Hoffmann, 1993...

...- and evaporate-hosted Balmat Zn deposit (New York) and the marble-hosted Franklin Zn deposit, New Jersey. A preliminary Zn isotope study was also made on sphalerite from the Gamsberg Sedex Zn deposit (South Africa) by S. E. Foulkes (unpub. M.Sc. thesis, Rhodes Univ., 2014), which, along with the Balmat deposit...

... was associated with a quartzite unit that outcropped intermittently on farms between Springbok and Aggeneys. It also played an important role in the mineralisation in the O’kiep Copper Company’s mines. Gossan samples at Aggeneys returned as much as 4.8% Cu, 6.8% Pb and 0.15% Zn. During the field work...

.... Mineral chemistry and genesis of the Gamsberg zinc deposit, South Africa Transactions of the Institution of Mining and Metallurgy, (Section B: Applied earth science) 1984 93 B161 75 Slack J. F. Tourmaline in Appalachian–Caledonian massive sulphide deposits and its exploration significance...