华南地质与矿产2012，Vol.28Issue(1)：35-44,10.
赣南淘锡坑钨矿床流体包裹体特征及其地质意义
Fluid Inclusion Characteristic and Its geological Implication of the Taoxikeng Tungsten Deposit,Southern Jiangxi Province
摘要
Abstract
Taoxikeng tungsten deposit is one of the most important quartz-vein type of W-polymetallic deposit in Southern Jiangxi Province,China.Four main types of fluid inclusions： single aqueous phase H2O-NaCl（Ⅰa type）,rich liquid L＋V two-phase H2O-NaCl（Ⅰb type）,two phase H2O-NaCl-CO2（Ⅱa type） and three phase H2O-NaCl-CO2（Ⅱb type） have been recognized in all samples from the wolframite-bearing quartz and topaz of the major mineralizing stage.The Ⅰb type homogenization temperatures are widely from 80℃ to 370℃ with multi-peaks distribution,mainly in 140 ~ 190℃,200 ~ 250℃ and 340~360℃.Ore-forming fluids has the characteristic of low salinity,generally 8 w（NaCleq） %.We obtained four related groups parameters by the means of ＂fluid inclusion assemblage＂.The results are indicated that different fluid inclusions parameters are generally belongs to the same range in the same fluid inclusion assemblage,such as salinities,homogenization temperatures and densities,while those parameters are quite different in different fluid inclusion assemblages,showing trapped fluids are diversity in different fluid inclusion assemblages.There are three ranges of the four fluid inclusion assemblages homogenization temperatures： 329 ~ 355 ℃,214 ~ 240 ℃ and 141 ~ 189 ℃,which can be adjusted to trapping temperature： 400 ~ 425 ℃,275 ~ 300 ℃ and 210 ~ 260 ℃ by pressure.All of these presented that there are existing at least three hydrothermal flow in Taoxikeng tungsten deposit,of which the first two periods are ore-forming hydrothermal activity,and the third period is a hydrothermal activity after diagenesis.According to CO2 homogenization temperatures and final homogenization temperatures of type Ⅱ fluid inclusions,this paper got trapping pressures 67.3 ~ 97.8 Mpa of ore-forming fluid,an average of 74.8 Mpa,converted into ore-forming depth of 2.59 ~ 3.77 km by lithostatic pressure,an average of 2.88 km.关键词
钨矿床/流体包裹体/流体包裹体组合/成矿流体/淘锡坑/赣南Key words
fluid inclusions/Fluid inclusion assemblage/ore-forming fluid/Taoxikeng tungsten deposit/southern Jiangxi province分类
地质学引用本文复制引用
汪群英,路远发,陈郑辉,彭相林,熊险峰..赣南淘锡坑钨矿床流体包裹体特征及其地质意义[J].华南地质与矿产,2012,28(1):35-44,10.基金项目
全国危机矿山接替资源找矿项目（20089947）资助 （）
