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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| Format: | Article |
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MDPI AG
2024-02-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/14/3/214 |
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| author | Chuntao Zhao Fanting Sun Jinggui Sun Jianping Wang Jilong Han Xiaolei Chu Chenglin Bai Dongmei Yu Zhikai Xu Lei Yi Shan Hua |
| author_facet | Chuntao Zhao Fanting Sun Jinggui Sun Jianping Wang Jilong Han Xiaolei Chu Chenglin Bai Dongmei Yu Zhikai Xu Lei Yi Shan Hua |
| author_sort | Chuntao Zhao |
| collection | DOAJ |
| 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 I<sub>1</sub>), late skarn stage (Stage I<sub>2</sub>), early quartz-sulfide stage (Stage II<sub>1</sub>), late quartz-sulfide stage (Stage II<sub>2</sub>) and quartz-carbonate stage (Stage II<sub>3</sub>). Gold precipitated in Stage II<sub>1</sub> and Stage II<sub>2</sub>. (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 (<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. |
| first_indexed | 2024-04-24T17:59:58Z |
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| issn | 2075-163X |
| language | English |
| last_indexed | 2024-04-24T17:59:58Z |
| publishDate | 2024-02-01 |
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| series | Minerals |
| spelling | doaj.art-f6eccc6959ff42e8bdf06e5c2a40c2e22024-03-27T13:56:07ZengMDPI AGMinerals2075-163X2024-02-0114321410.3390/min14030214Genesis 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 IsotopesChuntao Zhao0Fanting Sun1Jinggui Sun2Jianping Wang3Jilong Han4Xiaolei Chu5Chenglin Bai6Dongmei Yu7Zhikai Xu8Lei Yi9Shan Hua10Key Laboratory of Green and High-End Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, ChinaCollege of Earth Science, Jilin University, Changchun 130061, ChinaCollege of Earth Science, Jilin University, Changchun 130061, ChinaKey Laboratory of Green and High-End Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, ChinaCollege of Earth Science, Jilin University, Changchun 130061, ChinaCollege of Earth Science, Jilin University, Changchun 130061, ChinaCollege of Earth Science, Jilin University, Changchun 130061, ChinaKey Laboratory of Green and High-End Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, ChinaCollege of Earth Science, Jilin University, Changchun 130061, ChinaKey Laboratory of Green and High-End Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, ChinaThe Ninth Geological Brigade, Hebei Bureau of Geology and Mineral Resources Exploration, Xingtai 054000, ChinaSkarn 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 I<sub>1</sub>), late skarn stage (Stage I<sub>2</sub>), early quartz-sulfide stage (Stage II<sub>1</sub>), late quartz-sulfide stage (Stage II<sub>2</sub>) and quartz-carbonate stage (Stage II<sub>3</sub>). Gold precipitated in Stage II<sub>1</sub> and Stage II<sub>2</sub>. (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 (<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.https://www.mdpi.com/2075-163X/14/3/214mineralizationskarn mineralogyH-O isotopesfluid inclusionDa’anhe Au depositlesser Xing’an range |
| spellingShingle | Chuntao Zhao Fanting Sun Jinggui Sun Jianping Wang Jilong Han Xiaolei Chu Chenglin Bai Dongmei Yu Zhikai Xu Lei Yi Shan Hua 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 Minerals mineralization skarn mineralogy H-O isotopes fluid inclusion Da’anhe Au deposit lesser Xing’an range |
| 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
| topic | mineralization skarn mineralogy H-O isotopes fluid inclusion Da’anhe Au deposit lesser Xing’an range |
| url | https://www.mdpi.com/2075-163X/14/3/214 |
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