Organically geochemical characteristics of the Fankou Pb-Zn deposit in North Guangdong Province, China: Implication for

The Fankou Pb-Zn deposit is a very important and famous deposit in China. The time of Pb-Zn enrichment has been debated for a long time in this deposit. A total of seventeen samples of three sections were taken from the Fankou mine for the study of mineralization time and the mechanism of ore formation. The samples were analyzed by microscope, Soxhlet-extract, GC, and GC/MS methods. The results indicated that organic bulk parameters vary with the Pb-Zn contents in different samples and clearly were influenced by ore sulfide formation. Organically geochemical parameters (MPI 1, CPI) indicate that the paleotemperatures in the Fankou deposit are lower than 80℃ in all three sections. Sulfides in the wall rocks might occur mainly during synsedimentation or early diagenesis by BSR or partly by PR, rather than by TSR at such low temperatures, this stage may be the first mineralization stage. Sulfides near the faults might be formed by TSR after sedimentation, this stage may be the second mineralization stage.

作 者： SUN Yuzhuang CHEN Jianping LU Jialan LIU Jingwei   作者單位： SUN Yuzhuang(Key Laboratory of Resource Exploration Research of Hebei Province, Hebei University of Engineering, Handan 056038, China;Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China)

CHEN Jianping(Key Laboratory for Petroleum Geochemistry, CNPC, Beijing 100083, China)

LU Jialan(Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China)

LIU Jingwei(Key Laboratory of Resource Exploration Research of Hebei Province, Hebei University of Engineering, Handan 056038, China) 

刊 名： 中國(guó)地球化學(xué)學(xué)報(bào)（英文版）  英文刊名： CHINESE JOURNAL OF GEOCHEMISTRY  年，卷(期)： 2009 28(2)  分類(lèi)號(hào)： P59  關(guān)鍵詞： organic geochemistry   ore formation   bacterial sulfate reduction   thermochemical sulfate reduction   Fankou Pb-Zn deposit,China  

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