柴达木盆地南缘小红土湾锡矿地质特征及找矿前景  

Geological Characteristics and Prospecting Prospect of Xiaohongtuwan Tin Deposit in the Southern Margin of Qaidam Basin

作　　者：赵立志 田淇 ZHAO Lizhi;TIAN Qi(The Fifth Geological Exploration Institute of Qinghai Province,Xining,Qinghai 810000,China)

机构地区：[1]青海省第五地质勘查院,青海西宁810000

出　　处：《中国锰业》2023年第6期48-54,共7页China Manganese Industry

摘　　要：小红土湾锡矿区位于柴达木盆地南缘,大地构造位置处于秦祁昆造山系,昆北复合岩浆弧。锡矿体主要赋存于古元古界金水口岩群大理岩与早二叠世二长花岗岩接触所形成的矽卡岩带内,部分矿体位于大理岩内部的矽卡岩带中,矽卡岩带靠近酸性侵入岩一侧,锡矿品位较高,因此,矿床成因类型为矽卡岩型矿床。根据野外调查工作和研究,初步圈定了M1、M1-1、M1-2、M2、M3、M4为矿区内的主要锡矿体,矿体在深部具有一定延伸,具有较大找矿潜力。Xiaohongtuwan Tin deposit is located in the southern margin of Qaidam Basin,tectonically located in Qin-Qi-Kun orogenic system and the north Kunlun composite magmatic arc.The tin ore body mainly occurs in the skarn zone formed by the contact between the marble of Jinshuikou group in Paleoproterozoic and the monzonite granite in early Permian.Some ore bodies are located in the skarn zone inside the marble.The skarn zone is close to the acid intrusive rock and the tin ore grade is high.Based on field investigation and research,this paper preliminarily delineates M1,M1-1,M1-2,M2,M3 and M4 as the main tin ore bodies in the mining area.The orebodies extend to a certain extent in the deep and have great prospecting potential.

关 键 词：小红土湾 锡矿 柴达木盆地南缘 矽卡岩 

分 类 号：P618.44[天文地球—矿床学]