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

doi:10.12068/j.issn.1005-3026.2021.06.012

Abstract

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

CLC Number:

P611.1

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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