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《Earth Science Frontiers》 2004-02
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GEOLOGIC AND GEOCHEMICAL FEATURES OF THE CARLIN-TYPE GOLD ORE IN FENGSHAN OREFIELD OF EASTERN HUBEI

LIU Ji-shun~1, SHU Guang-long~(1,2), GAO Zhen-quan~1(1.Institute of Geology and Environmental Engineering, Central-South University,Changsha 410083, China;2.Department of Resources and Environmental Engineering, Guilin Instituteof Technology, Guilin 541004, China)  
The Fengshan orefield consists of the Fengshan Cu deposit, the Jilongshan Au-Cu deposit and the Lijiawan Cu deposit, which are skarn-porphyry-type deposits. Based on the field on-site survey and the laboratory study, it is confirmed that the Carlin-type gold deposit exists in the orefield, its Au average grade is about 5×10~(-6), and its prospective reserves are above the large-scale size. The deposit is of the following characteristics: (1) Gold mineralization is distributed within the developed area of the intermediate-acidic dike in the periphery of the Fengshan porphyry body; (2) Ore-host is weakly marbleized veneer and brecciated carbonate rocks of Daye Formation of Triassic system; (3) Orebody is mostly controlled by high-angled faults and is generally located within a side of the dike rock or near it; (4) Ore-host rock is generally white stockwork veinlet calcitization with pelletal, strawberry-like and disseminated veinlet pyrite and with black carbonaceous coating film on its cataclastic surface; (5) Gold occurs chiefly as the submicro gold grade. Most metallogenic materials were derived from source beds and some from magma; the metallogenic hydrothermal water was derived from meteoric water.
【Fund】: 国家自然科学基金资助项目 ( 4 0 0 72 0 3 2 )
【CateGory Index】: P618.51
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