岩石矿物学杂志2012，Vol.31Issue(5)：712-722,11.
云南澜沧老厂深部斑岩钼(铜)矿成矿物质来源的同位素地球化学证据
Isotopic geochemical evidence of the sources of ore-forming materials for the Laochang deep porphyry Mo(Cu) deposit in Lancang, Yunnan
摘要
Abstract
Based on a comprehensive analysis of S, Pb, H, O isotope geochemical characteristics of the Laochang deep porphyry molybdenum (copper) ore bodies, this paper deals with concealed porphyry metallogenic source material in Lancang of Yunnan Province. Studies show that the main sulfide o S values of porphyry molybdenum (copper) ore bodies are between - 3.99 %o and +1.8 %o, concentrated in a narrow distribution area, with an average of - 1.32%o. The test results of S isotope show the crust-mantle characteristics with the mixture derived from the lower crust and the upper mantle. The main lead isotope 206Pb/204Pb ratios of porphyry molybdenum (copper) ore bodies vary in the range of 17.863~ 18.701, with an average of 18.411. 207Pb/204Pb ratios vary in the range of 15.448 ~ 15.733, with an average of 15.628. 208Pb/204Pb ratios vary in the range of 37.753~39.104, with an average of 38.615. These data show that lead was derived not only from the formation but also from the ancient continental crust basement located in the lower part of the ore-bearing layer, deep mantle and volcanic magma. The δ18Oho values of porphyry molybdenum (copper) ore bodies vary between ~9.51%o and +9.41%o, SD values vary between - 93%o and -46.2%o, suggesting that the ore-forming solution of the porphyry ore body was derived from media water from magmatic water and atmospheric precipitation,with the atmospheric precipitation playing the dominant role.关键词
斑岩钼(铜)矿体/成矿物质来源/同位素地球化学/澜沧老厂/云南省Key words
porphyry molybdenum (copper) ore bodies/ source of ore-forming materials/ isotope geochemistry/Laochang of Lancang/ Yunnan Province分类
天文与地球科学引用本文复制引用
赵晓勇,李峰,杨帆..云南澜沧老厂深部斑岩钼(铜)矿成矿物质来源的同位素地球化学证据[J].岩石矿物学杂志,2012,31(5):712-722,11.基金项目
国家危机矿山接替资源勘查项目(200653056,20089943) （200653056,20089943）
