流体包裹体爆裂法测温技术可靠性讨论——以江西大吉山钨矿为例  

Discussions on Reliability of the Decrepitation Technique Applied in Fluid Inclusion Studies:Taking the Jiangxi Dajishan Tungsten Deposit as An Example

作　　者：徐文刚[1] 张德会[1] 席斌斌[1] 张文淮[2] 施娘华[1] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]中国地质大学地球科学学院,湖北武汉430074

出　　处：《现代地质》2008年第5期757-765,共9页Geoscience

基　　金：全国危机矿山接替资源找矿项目(200636033);国家自然科学基金项目(40573033;40173021)

摘　　要：爆裂法是一种经济快速的流体包裹体测温技术,由于该技术的影响因素较多且测试精度往往不是很高,历来受到很多学者的质疑。为了讨论爆裂法测温技术的可靠性,在前人研究的基础上,利用冷热台对大吉山钨矿含矿石英脉中的包裹体爆裂温度进行了显微测温,分析了包裹体个体大小对爆裂温度的影响,发现两者之间存在着明显的反相关性;同时,对数据的进一步分析发现爆裂法测温曲线反映的爆裂峰是2期3类包裹体爆裂叠加的结果,但是实验测得的爆裂温度区间与爆裂法测温结果基本上是吻合的,这说明爆裂法测温技术虽然有较多的影响因素,但是在一定程度上是可靠的,尤其是在找矿勘探方面其潜力很大,值得推广应用。As a prospecting method, acoustic decrepitation technique could provide a rapid and simple mean of identifying the barren and mineralized quartz veins. However, the method has not gained routine acceptance and development because of its semi-quantitative nature and possible difficulties in decrepigram interpretation. In order to discuss the reliability of the decrepitation technique, microthermometry is applied to determine the decrepitation temperature of fluid inclusions in quartz samples collected from Dajishan tungsten deposit in Jiangxi Province. The microthermometry data indicate that the decrepitated temperature is anti-related with the size of fluid inclusions and the decrepitated peak in decrepigram is overlapped by decrepitation of all these three types of fluid inclusions. The results show that the decrepitation technique is reliable in exploration applications and should be used widely.

关 键 词：大吉山钨矿 流体包裹体 爆裂法测温技术 爆裂峰 显微测温 找矿勘探 

分 类 号：P611[天文地球—矿床学]