西北地质2013，Vol.46Issue(1)：119-129,11.
青海三江北段莫海拉亨铅锌矿床地质特征及铅同位素组成的地质意义
Geologic Characteristics and Genetic Analysis of Lead-zinc Deposits of the Mohailaheng Area in the Northern Section of Lancang River, Nujiang River, and Jinsha River, Qinghai
摘要
Abstract
Mohailaheng lead-zinc deposit is located in Jieduo back-arc foreland basin of the north rim of the north of Sanjiang metallogenic belt, its main ore-bearing horizon is the lower carboniferous supported heteropoly group of carbonate group, Containing ore formation and NWW fracture are important ore-controlling factors. Ore minerals are mainly galena, sphalerite, limonite and so on. The research results of lead isotope in the study area show that lead quarries μ is 9. 27-9. 77, the average of μ is less than 9. 58, the average of ω is 39. 99, lead isotopic composition has the characteristics of normal lead evolution. Lead quarries 206Pb/204 Pb is 18. 51-18. 92, the average of 208Pb/204 Pb is 38. 64, with the characteristics of stable isotopic composition. Lead mineralizing materials have the characteristics of crust-mantle evolution in Zartman lead isotope structure. Based on the above analysis, Mohailaheng lead-zinc mine mainly occurs in thick-super thick layers of carbonate rocks, and the mineralization had no direct relation to magmatic activity, which reflected that the lead came from lead mine construction of the upper earth s crust, lead containing formation or subprime fracture intersection part are favorable met-allogenic or prospecting positions.关键词
三江北段/莫海拉亨/Pb锌矿床/地质特征/铅同位素Key words
The north section of Sanjiang/ Mohailaheng/ Pb-Zn deposit/ geological characteristics/ lead isotope分类
天文与地球科学引用本文复制引用
李善平,黄青华,李小雪,陈静,任华,白宗海..青海三江北段莫海拉亨铅锌矿床地质特征及铅同位素组成的地质意义[J].西北地质,2013,46(1):119-129,11.基金项目
973计划前期研究专项课题(2010CB434808),青海省科学技术厅重大科技项目(2010-J-A1) （2010CB434808）
