QIAN Zhi-kuan1,2, WU Jun-de3, Kang De-ming3, LU Rong-yu3, YANG Bao-fu3, HU Yong3, LUO Tai-yi1, HUANG Zhi-long1
(1. State Key Laboratory of Ore Deposit Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China；
3．Group Company of Stannary Gejiu in Yunnan, Gejiu 610000, China)
Abstract: Cassiterite-hematite-calcite vein-type orebody was found in Songshujiao mining area of Gejiu Tin-deposit, and was first reported in this paper. Preliminary study shows that the vein-type orebody is the result of the late ore-forming fluid condensated in the transport channel. The paper also preliminary discussed the cause of its genesis. According to the comparison between the Gejiu tin-polymetallic deposits and the Red Sea-type hydrothermal deposits, we believe that there are two models for the “Interstratified oxidized ore” of the Gejiu and the Red Sea-type orebodies; one is thermal brine staged oxidize from the top down, and another is ore-forming fluid oxidized from the bottom up gradually.
Key words: geological characteristics; cassiterite-hematite-calcite; transport channel; Gejiu; Yunnan
E-mail: luotaiyi@vip.gyig.ac.cn
ACTA MINERALOGICA SINICA Vol. 31, No. 3, 2011, Page 328-337
