Affiliation of Author(s):资源学院
Journal:矿床地质
Place of Publication:北京
Key Words:地球化学;流体包裹体;稳定同位素;矿床成因;东闯金矿床
Abstract:东闯金矿床位于华北板块南缘的小秦岭金成矿带中部地区。矿体呈脉状、透镜状赋存于东西向压扭 性断裂中,赋矿围岩为太古界太华群变质岩系。成矿作用可分为4个阶段,从早到晚,流体包裹体均一温度分别为 296~ 342℃、257~ 341℃、250~ 314℃和175~ 267℃ ;对应流体盐度w(NaCleq)为5.23%~ 6.63%、1.63%~ 8.77%、 3.38%~ 8.61%和8.55%~ 11.1%,以5%~ 9%为主,流体成分以H2O-NaCl-CO2为主。估算成矿压力为100~ 160 MPa,静岩压力深度3.6~ 5.3 km。包裹体水的δDV-SMOW值为- 49‰ ~ 80.2‰ ,多数在50‰ ~ 60‰之间,δ 18O水计算 值为3.33‰ ~ 7.88‰。碳酸盐矿物δ 13CV-PDB为- 5.1‰ ~ - 1.3‰ ,δ 18OV-SM为9.9‰ ~ 15.29‰。矿石硫化物的 δ 34SV-CDT为- 2.75‰ ~ 5.52‰ ,均值1.11‰ ,而其206Pb/ 204Pb= 16.973‰ ~ 17.068‰、207 Pb/ 204 Pb= 15.322‰ ~ 15.394‰、208Pb/ 204Pb= 37.323‰ ~ 37.491‰。流体包裹体研究以及H-O、S、C、Pb同位素结果表明,东闯金矿床的 成矿流体主要来自深部岩浆,矿质主要来自太华群
Co-author:范寿龙 何谋春 姚书振 丁振举
First Author:范寿龙
Indexed by:Journal paper
Correspondence Author:何谋春
Document Code:0258-7106(2012)01-0027-14
Volume:31
Issue:1
Page Number:27-40
Translation or Not:no
Date of Publication:2012-03-04
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Date of Birth:1965-11-01
Date of Employment:1989-07-01
School/Department:Department of resource science and engineering
Education Level:Doctoral Degree in Education
Gender:Male
Degree:Doctoral Degree in Science
Status:在岗
Discipline:Mineralogy, Petrology, and Economic Geology
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