Geothermal and fluid flowing simulation of ore-forming antimony deposits in Xikuangshan  

作　　者：YANG Ruiyan1,2, MA Dongsheng2, BAO Zhengyu3, PAN Jiayong2, CAO Shuanglin2 & XIA Fei2 1. School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China 2. State Key Laboratory for Research of Mineral Deposits, Nanjing University, Nanjing 210093, China 3. Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China 

出　　处：《Science China Earth Sciences》2006年第8期862-871,共10页中国科学（地球科学英文版）

基　　金：This work was supported by the 973 Program(Grant No.G1999043210);the National Natural Science Foundation of China(Grant Nos.40073007 and 40272080).

摘　　要：The Xikuangshan Antimony Deposit located in the Mid-Hunan Basin, China, is the larg- est antimony deposit in the world. Based on the hydrogeological and geochemical data collected from four sections, Xikuangshan-Dajienao (AO), Xikuangshan-Dashengshan (BO), Xikuang- shan-Longshan (CO) and Dafengshan (DO) in the Basin, an advanced metallogenic model related to deep-cyclic meteoric water of Xikuangshan Antimony Deposit is put forward in this paper using a model of heat-gravity-driving fluid flow transportation. The simulation results show that the ore-forming fluid of the deposit mainly comes from the Dashengshan and Longshan areas where BO and CO sections are located if the overall basin keeps a constant atmospheric precipitation and infiltration rate during mineralization, and that the average transportation speed of the ore-forming fluids is about 0.2―0.4 m/a.The Xikuangshan Antimony Deposit located in the Mid-Hunan Basin, China, isthe largest antimony deposit in the world. Based on the hydrogeological and geochemical datacollected from four sections, Xikuangshan-Dajienao (AO), Xikuangshan-Dashengshan (BO),Xikuang-shan-Longshan (CO) and Dafengshan (DO) in the Basin, an advanced metallogenic model relatedto deep-cyclic meteoric water of Xikuangshan Antimony Deposit is put forward in this paper using amodel of heat-gravity-driving fluid flow transportation. The simulation results show that theore-forming fluid of the deposit mainly comes from the Dashengshan and Longshan areas where BO andCO sections are located if the overall basin keeps a constant atmospheric precipitation andinfiltration rate during mineralization, and that the average transportation speed of theore-forming fluids is about 0.2-0.4 m/a.

关 键 词：ORE-FORMING fluid  numerical simulation  GEOTHERMAL field  geofluid transport  Xikuangshan  ANTIMONY deposits. 

分 类 号：P548[天文地球—构造地质学]