内蒙古甲生盘铅锌硫矿床硫同位素特征及其成因意义  

Features of Sulfur Isotope of the Jiashengpan Lead-Zinc-Sulfur Deposit in Inner Mongolia and Its Genesis Significance

作　　者：付超[1,2] 王建平[1,2] 彭润民[1,2] 刘家军[1,2] 柳振江[1,2] 刘哲铭 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室,北京100083 [2]中国地质大学岩石圈构造、深部过程及探测技术教育部重点实验室,北京100083 [3]甲生盘铅锌硫矿业公司,内蒙古乌拉特中旗015300

出　　处：《现代地质》2010年第1期34-41,共8页Geoscience

基　　金：国家重点基础研究发展计划项目(2006CB403503);国家自然科学基金面上项目(40602010);高等学校学科创新引智计划项目(B07011);中国地质大学(北京)地质过程与矿产资源国家重点实验室开放基金项目(GPMR0737)

摘　　要：甲生盘铅锌硫矿床位于华北陆块北缘西段狼山—渣尔泰山成矿带,赋存于中元古代渣尔泰山群地层中,具有明显的层控特征并受同生断裂影响,区内矿石层纹状、角砾状和浸染状构造发育。矿石硫化物硫同位素测试分析表明：早期沉积硫化物3δ4S值变化范围在17.0‰～31.5‰之间,均值为23.9‰;后期穿插脉状硫化物3δ4S值变化范围在13.1‰～31.1‰之间,均值为24.1‰;二者δ^34S值相近,均属海水硫酸盐来源,后期热液改造作用微弱,火山活动对该矿区成矿作用直接贡献不明显;围岩3δ4S值变化范围在7.7‰～15.1‰之间,均值为10.2‰,明显小于矿石硫化物的3δ4S值,亦属海相沉积范畴;矿体北翼发育海西期花岗岩,但其对矿体的改造作用有限。The Jiashengpan lead-zinc-sulfur deposit,located in Langshan-Zhaertaishan mineralization belt in the western part of northern margin of North China Platform,rich in Mesoproterozoic Zhaertaishan Group,is obviously stratabound and controlled by synchronous fault.The ore bodies are mainly composed of layered,conglomeratic and disseminated ores.The sulfur isotopic compositions of the sulfides from ores show that the values of δ34S from the early depositional ores ranging from 17.0‰ to 31.5‰ with an average of 23.9‰ are similar to the values of δ^34S from the late reticulated ores ranging from 13.1‰ to 31.1‰ with an average of 24.1‰,indicating the same origin from sea sulphate.The late hydrothermal event is weak and the volcanic activities have little effect on the mineralization.The values of δ^34S from the host rocks ranging from 7.7‰ to 15.1‰ with an average of 10.2‰,are smaller than those of the ores obviously and belong to the marine deposition.The Varisian granite to the north of the ore bodies has limited effect on the ore bodies.

关 键 词：硫同位素 SEDEX型矿床 甲生盘铅锌硫矿 内蒙古 

分 类 号：P618.2[天文地球—矿床学]