Metallogenic geological conditions of Shimensi tungsten-polymetallic deposit in north Jiangxi province
Metallogenic geological conditions of Shimensi tungsten-polymetallic deposit in north Jiangxi province
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发表时间：
2012
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通讯作者：
Jian-hua Xu
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作者：
Jian-hua Xu
石门寺钨多金属存款位于下扬子成矿域江南地块中生代铜钼金银铅锌成矿带内，本文在区域地质背景和矿床成矿地质特征的基础上，详细分析了围岩、围岩、围岩为晋宁晚期黑云母花岗闪长岩，被认为是S-新元古代在未成熟陆壳基础上发育的同碰撞火山弧S型花岗岩，寄主岩石为燕山期斑状黑云母花岗岩、细粒黑云母花岗岩、钙碱性系列Si、Al饱和岩石的花岗斑岩、陆内碰撞挤压作用下九岭岩基熔融同源演化形成的S型花岗岩;石门寺断裂与仙果山-独塘-石尾洞基底断裂交汇的控矿断裂控制了含矿花岗岩的侵位和钨多金属矿床的分布。
Shimensi tungsten polymetallic deposit is located in Mesozoic Cu-Mo-Au-Ag-Pb-Zn ore belt,Jiangnan block,Lower Yangtze metallogenic province.Based on the regional geological setting and metallogenic geological feature of the deposit this paper analyses the ore-control factors in detail,such as country rock,host rock and fractures in the working area.The country rock is biotite granodiorite of Late Jinning period which is recognized the S-type granite in syn-collision volcanic arc developed on basis of immature continental crust during Neo-proterozoic era;the host rock,Yanshanian porphyritic biotite granite,fine-grained biotite granite,granoporphry which are Si,Al saturated rock of Ca-alkali series,the S-type granite derived from melting and cognate evolution of Jiuling batholith under intra-continental collisional compression;Shimensi fracture and Xianguoshan-Dhutang-Shiweidong basemental fractures,the ore-control fracture whose intersection controls emplacement of the ore-bearing granite and distribution of W-polymetallic deposits.