广西朋村-盘龙铅锌矿地球化学特征及矿床成因  

Geochemical characteristics and genesis in Pengcun-Panlong Pb-Zn deposit of Guangxi

作　　者：梁国宝[1,2] 胡明安[1] 杨振[1] 

机构地区：[1]中国地质大学资源学院,武汉430074 [2]广西五福矿业有限公司,南宁530031

出　　处：《桂林理工大学学报》2015年第3期437-444,共8页Journal of Guilin University of Technology

基　　金：中国地质调查局项目(199910200224)

摘　　要：朋村-盘龙铅锌矿位于广西大瑶山西侧铜铅锌多金属成矿带南段,矿体产于下泥盆统上伦组白云岩和官桥组白云岩NE向层间挤压破碎带中,明显受层位、岩性、构造的联合控制,矿石中矿物组合简单,主要为闪锌矿、黄铁矿和方铅矿等。对硫同位素、氢氧同位素、微量元素、稀土元素、有机质等矿床地球化学特征进行了研究:铅锌矿石的δ34S值为-1.51‰~10.23‰,δDSMOW为-40‰^-24‰,δ18OH2O为-6.27‰^-1.78‰;矿石的∑REE较低,为(3.565~12.43)×10-6;矿石及围岩的有机质含量为3.24%~10.21%。成矿物质来源以地层为主,部分可能来自深源岩浆,成矿流体为大气降水渗入形成的地下含矿热卤水,矿物包裹体数据显示均一温度为90~230℃,矿床成因类型为中低温沉积-热卤水改造型铅锌矿。Pengcun-Panlong Pb-Zn deposit occurs in the south of Pb-Zn polymetalic mineralication district in western Dayaoshan of Guangxi.The orebodies are found in the fracture zone of Lower Devonian Shanglun For-mation and Guanqiao Formation.It is jointly controlled by layers, lithologies and structure.The mineral assem-blage of the ore deposit is simple, most are sphalerite, galena, pyrite, etc.The lead-zinc ores δ34 S are from-1.51‰ to10 .23‰,δDSMOW from -40‰ to -24‰,δ18OH2O from -6.27‰ to-1.78‰.∑REE is lower , from 3.565 ×10 -6 to 12.43 ×10 -6.The organic matter of ore and wall rock are from 3.24% to 10.21%.Based on the sulfur isotopic, hydrogen-oxygen isotopic, trace elements, rare elements and organism analyses, it is concluded that the ore-forming substances mostly came from the strata and partially from the anatectic magma . Ore fluid was the hot brines which came from the meteoric water.Mineral inclusion data indicates that the hom-ogeneous temperature is 90-230 ℃.Geochemical data shows that genetic type of the Pb-Zn deposit ,ranges from low to medium sedimentation-hot brines reformed deposit.

关 键 词：矿床成因 地球化学 朋村-盘龙铅锌矿 

分 类 号：P618.401[天文地球—矿床学]