Genesis and Prospecting Potential of the Da’anhe Skarn Au Deposit in the Central of the Lesser Xing’an Range, NE China: Evidence from Skarn Mineralogy, Fluid Inclusions and H-O Isotopes

Skarn Au deposits exist in the circum-pacific metallogenic belt. Interestingly, the Da’anhe Au deposit is the only independent skarn gold deposit in the Lesser Xing’an Range. To determine the metallogenic mechanism and prospecting potential of the Da’anhe deposit, we performed skarn mineralogy, flui...

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Published in:Minerals (Basel) 2024-03, Vol.14 (3), p.214
Main Authors: Zhao, Chuntao, Sun, Fanting, Sun, Jinggui, Wang, Jianping, Han, Jilong, Chu, Xiaolei, Bai, Chenglin, Yu, Dongmei, Xu, Zhikai, Yi, Lei, Hua, Shan
Format: Article
Language:English
Subjects:
Anniversaries
Carbonates
Da’anhe Au deposit
Diorite
Exploration
Fault lines
fluid inclusion
Fluid inclusions
Geology
Gold
H-O isotopes
High temperature
Isotopes
Jurassic
Lava
lesser Xing’an range
Low temperature
Magma
Magmatic water
Marble
Metallogenesis
Meteoric water
Mineral deposits
Mineralization
Mineralogy
Moisture content
Molybdenum
Permian
Quartz
Rocks
Salinity
Salinity effects
skarn mineralogy
Stone
Stratigraphy
Sulfides
Sulphides
Water content
Water depth
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container_issue 3
container_start_page 214
container_title Minerals (Basel)
container_volume 14
creator Zhao, Chuntao
Sun, Fanting
Sun, Jinggui
Wang, Jianping
Han, Jilong
Chu, Xiaolei
Bai, Chenglin
Yu, Dongmei
Xu, Zhikai
Yi, Lei
Hua, Shan
description Skarn Au deposits exist in the circum-pacific metallogenic belt. Interestingly, the Da’anhe Au deposit is the only independent skarn gold deposit in the Lesser Xing’an Range. To determine the metallogenic mechanism and prospecting potential of the Da’anhe deposit, we performed skarn mineralogy, fluid inclusion (FI) and H-O isotope analyses. The results show the following: (1) The Da’anhe deposit is a calcareous reduced skarn Au deposit that formed between an Early Jurassic gabbroic diorite and the Permian Tumenling Formation marble. Its metallogenic process includes five stages: the early skarn stage (Stage I1), late skarn stage (Stage I2), early quartz-sulfide stage (Stage II1), late quartz-sulfide stage (Stage II2) and quartz-carbonate stage (Stage II3). Gold precipitated in Stage II1 and Stage II2. (2) The initial ore-forming fluid was derived from magmatic water and featured a high temperature and intermediate to high salinity. After boiling and mixing, the fluid eventually changed to a low-temperature and low-salinity reducing fluid dominated by meteoric water. (3) The formation depth of the Au orebodies was 2.27–3.11 km, and the orebodies were later lifted to the surface (
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Interestingly, the Da’anhe Au deposit is the only independent skarn gold deposit in the Lesser Xing’an Range. To determine the metallogenic mechanism and prospecting potential of the Da’anhe deposit, we performed skarn mineralogy, fluid inclusion (FI) and H-O isotope analyses. The results show the following: (1) The Da’anhe deposit is a calcareous reduced skarn Au deposit that formed between an Early Jurassic gabbroic diorite and the Permian Tumenling Formation marble. Its metallogenic process includes five stages: the early skarn stage (Stage I1), late skarn stage (Stage I2), early quartz-sulfide stage (Stage II1), late quartz-sulfide stage (Stage II2) and quartz-carbonate stage (Stage II3). Gold precipitated in Stage II1 and Stage II2. (2) The initial ore-forming fluid was derived from magmatic water and featured a high temperature and intermediate to high salinity. After boiling and mixing, the fluid eventually changed to a low-temperature and low-salinity reducing fluid dominated by meteoric water. (3) The formation depth of the Au orebodies was 2.27–3.11 km, and the orebodies were later lifted to the surface (&lt;500 m). The potential for finding skarn Au deposits in the study area is limited. 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Interestingly, the Da’anhe Au deposit is the only independent skarn gold deposit in the Lesser Xing’an Range. To determine the metallogenic mechanism and prospecting potential of the Da’anhe deposit, we performed skarn mineralogy, fluid inclusion (FI) and H-O isotope analyses. The results show the following: (1) The Da’anhe deposit is a calcareous reduced skarn Au deposit that formed between an Early Jurassic gabbroic diorite and the Permian Tumenling Formation marble. Its metallogenic process includes five stages: the early skarn stage (Stage I1), late skarn stage (Stage I2), early quartz-sulfide stage (Stage II1), late quartz-sulfide stage (Stage II2) and quartz-carbonate stage (Stage II3). Gold precipitated in Stage II1 and Stage II2. (2) The initial ore-forming fluid was derived from magmatic water and featured a high temperature and intermediate to high salinity. 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After boiling and mixing, the fluid eventually changed to a low-temperature and low-salinity reducing fluid dominated by meteoric water. (3) The formation depth of the Au orebodies was 2.27–3.11 km, and the orebodies were later lifted to the surface (&lt;500 m). The potential for finding skarn Au deposits in the study area is limited. (4) The distinctive nature of the ore-related magma (i.e., source, reducing conditions and high water content) was key to the formation of the Da’anhe skarn gold deposit.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/min14030214</doi><orcidid>https://orcid.org/0000-0002-7148-8854</orcidid><oa>free_for_read</oa></addata></record>
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subjects Anniversaries
Carbonates
Da’anhe Au deposit
Diorite
Exploration
Fault lines
fluid inclusion
Fluid inclusions
Geology
Gold
H-O isotopes
High temperature
Isotopes
Jurassic
Lava
lesser Xing’an range
Low temperature
Magma
Magmatic water
Marble
Metallogenesis
Meteoric water
Mineral deposits
Mineralization
Mineralogy
Moisture content
Molybdenum
Permian
Quartz
Rocks
Salinity
Salinity effects
skarn mineralogy
Stone
Stratigraphy
Sulfides
Sulphides
Water content
Water depth
title Genesis and Prospecting Potential of the Da’anhe Skarn Au Deposit in the Central of the Lesser Xing’an Range, NE China: Evidence from Skarn Mineralogy, Fluid Inclusions and H-O Isotopes
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