辽西蒋家屯和兰家沟钼矿的流体包裹体对比研究

doi:10.12068/j.issn.1005-3026.2021.06.012

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (6): 835-841.DOI: 10.12068/j.issn.1005-3026.2021.06.012

辽西蒋家屯和兰家沟钼矿的流体包裹体对比研究

李明¹，王国光²，张永利¹，巩恩普¹

(1. 东北大学资源与土木工程学院，辽宁沈阳110819; 2. 南京大学地球科学与工程学院，江苏南京210023)

修回日期:2020-10-20 接受日期:2020-10-20 发布日期:2021-06-23
通讯作者: 李明
作者简介:李明(1985-)，男，辽宁沈阳人，东北大学博士研究生；巩恩普(1958-)，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(41972002).

Comparative Study on the Fluid Inclusion in Jiangjiatun and Lanjiagou Mo Deposits in the Liaoxi Area

LI Ming¹， WANG Guo-guang²， ZHANG Yong-li¹， GONG En-pu¹

1.School of Resources and Civil Engineering， Northeastern University， Shenyang 110819， China; 2.School of Earth Sciences and Engineering， Nanjing University， Nanjing 210023， China.

Revised:2020-10-20 Accepted:2020-10-20 Published:2021-06-23
Contact: LI Ming
About author:-
Supported by:
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摘要/Abstract

摘要： 通过对辽西蒋家屯和兰家沟钼矿的流体包裹体研究，两种不同类型的成矿流体被识别出来.蒋家屯脉状钼矿含矿石英脉中发现大量的Ⅰ型水溶液流体包裹体，成矿流体的均一温度为163~234℃，盐度为3.06%~ 6.01%(NaCl eqv，质量分数)，表明成矿流体为中低温度、低盐度流体.兰家沟斑岩型钼矿含矿石英脉中发育含CO₂Ⅱ型包裹体，包裹体内较高含量的CO₂指示了成矿深度较大.兰家沟钼矿的成矿流体均一温度为200~283℃(Ⅰ型包裹体)和281~346℃(Ⅱ型包裹体)，盐度为2.74%~7.31%(NaCl eqv，质量分数)(Ⅰ型包裹体)和3.52%~4.80%(NaCl eqv，质量分数)(Ⅱ型包裹体).鉴于上述研究，与大型兰家沟斑岩型钼矿相比，目前揭露的蒋家屯脉状钼矿体成矿深度较小，成矿温度较低，其深部可能会发现更具经济价值的斑岩型钼矿体.

关键词: 流体包裹体；钼矿；蒋家屯；兰家沟；辽西

Abstract: Based on the fluid inclusion study on the Jiangjiatun and Lanjiagou Mo deposits， two distinctive ore-forming fluids were identified. Fluid inclusions in the Jiangjiatun Mo deposit are characterized by type Ⅰ two-phase aqueous inclusions， with homogenization temperatures from 163 to 234℃ and salinity values from 3.06% to 6.01%. It indicates that ore-forming fluids are moderate-low homogenization temperature and salinity. Fluid inclusions in the Lanjiagou Mo deposit are featured by type Ⅱ CO₂-bearing fluid inclusions， indicating a deep formation environment. Microthermometric data in the Lanjiagou Mo deposit show homogenization temperatures from 200 to 283℃ for type Ⅰ inclusions and from 281 to 346℃ for type Ⅱ inclusions， and salinities from 2.74% to 7.31% for type Ⅰ inclusions and from 3.52% to 4.80% for type Ⅱ inclusions. In view of the above research results， it is believed that the discovered ore bodies in the Jiangjiatun deposit were formed in a much shallower environment with lower homogenization temperature and salinity than the Lanjiagou Mo deposit. It indicates that it is possible to find Mo orebodies at depth beneath the exposed ore bodies.

Key words: fluid inclusion; porphyry Mo deposit; Jiangjiatun; Lanjiagou; Liaoxi area

中图分类号:

P611.1

李明，王国光，张永利，巩恩普. 辽西蒋家屯和兰家沟钼矿的流体包裹体对比研究[J]. 东北大学学报（自然科学版）, 2021, 42(6): 835-841.

LI Ming， WANG Guo-guang， ZHANG Yong-li， GONG En-pu. Comparative Study on the Fluid Inclusion in Jiangjiatun and Lanjiagou Mo Deposits in the Liaoxi Area[J]. Journal of Northeastern University(Natural Science), 2021, 42(6): 835-841.

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辽西蒋家屯和兰家沟钼矿的流体包裹体对比研究

Comparative Study on the Fluid Inclusion in Jiangjiatun and Lanjiagou Mo Deposits in the Liaoxi Area

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