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Kupfer in Basalt aus China

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prehnit100:
was meint ihr sind die echt ?
http://cgi.ebay.de/Minerali-cristalli-Rame-Native-Copper-Chalcocite-188_W0QQitemZ120279545950QQihZ002QQcategoryZ3225QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
sehe ich seit einiger zeit im ebay bei diesem händler. laut mindat gibt es einen basaltaufschluß mit Au und Cu (http://www.mindat.org/loc-155772.html) welcher in etwa zur fundortangabe passen würde
udo

Collector:
http://www.springerlink.com/content/m48287516758j032/

Epigenetic hydrothermal features of the Emeishan basalt copper mineralization in NE Yunnan, SW China
Houmin Li3, Jingwen Mao3, Yuchuan Chen3, Denghong Wang3, Changqing Zhang4 and Hong Xu4
(3)    Institute of Mineral Resources, Chinese Academy of Geological Sciences, 26 Baiwanzhuang Rd., Beijing, 10037, China
(4)    Faculty of Geosciences and Resources, China University of Geosciences (Beijing), 29 Xueyuan Rd., Beijing, 10083, China

Abstract
Native copper in basalt copper deposits in NE Yunnan, SW China, formed in fissures of basalt or in carbonaceous sedimentary interbeds of basalt together with organic matter such as bitumen. The mineral fills in fissures of bitumen and replaces plant fragments. Bitumen is of organic origin, with its_δ13CV-PDB values ranging from −27.3 to_−33.1‰. The 40Ar-39Ar ages of the gangue minerals zeolite and actinolite in copper ores are 226 to 238.6 Ma and 134 to 149.1 Ma respectively, indicating the occurrence of two copper mineralization stages. All these suggest that the copper mineralization is of epigenetic hydrothermal origin.
Keywords  Basalt copper deposit - epigenetic hydrothermal mineralization - organic matter - Emeishan basalt - NE Yunnan - SW China

Gruß
collector

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