Citation: | WAN Hong,OUYANG Yongpeng,CHEN Qi,et al. Trace Element Geochemical Characteristics of the Shangshuiqiao Fluorite Deposit in Eastern Jiangxi with Implications for the Genesis of the Deposit[J]. Northwestern Geology,2024,57(4):80−96. doi: 10.12401/j.nwg.2024003 |
The Shangshuiqiao fluorite deposit in Lichuan, eastern Jiangxi, is located at the northern end of the Wuyi metallogenic belt in the South China fold system and is produced in the fractured fracture zone of Yanshanian biotite granite. This paper investigates the geological characteristics of the deposit, as well as the trace element geochemical features of different-colored fluorites and the surrounding biotite granite. The results show that fluorite shows positive Eu anomalies and negative Ce anomalies as a whole, but the REE distribution pattern characteristics of different colors of fluorite are different. Light green, dark green and purple fluorite are light rare earth enriched types, and white fluorite is heavy rare earth enriched type. Enriched type. The REE distribution pattern of the surrounding rock is light rare earth enriched type, and the overall negative Eu anomaly is present. The Y/Ho-La/Ho relationship diagram and REE partitioning model diagram show that Y-REE fractionation occurred during the fluorite mineralization process, and the white fluorite mineralization period was the latest. The Tb/Ca-Tb/La relationship diagram shows that the fluorite deposits in the study area are of hydrothermal origin. The change trend of the trace element distribution curve of the surrounding rock biotite granite is basically the same as that of fluorite, and the Sm/Nd values of the surrounding rock and fluorite are very close. At the same time, the F content in the surrounding rocks closer to the ore body is higher, and the surrounding rocks near the ore undergo alterations such as silicification and sericitization. It is inferred that Ca and F in the fluorite ore mainly come from the surrounding rocks. The fluorite in the mining area was formed in a medium-low temperature oxidation environment, and the deposit formation type is a multi-stage medium-low temperature hydrothermal filling type fluorite deposit.
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刘迅, 孙知明, 马寅生, 等. 武夷山北部及周边地区控矿构造及成矿预测[M]. 北京: 地震出版社, 1999.
|
|
刘英俊, 曹励明.元素地球化学导论[M]. 北京: 地质出版社, 1987.
LIU Yingjun, CAO Liming. Element Geochemistry Intro duction[M]. Beijing: Geological Publishing House, 1987.
|
|
|
|
|
|
王中刚, 于学元, 赵振华. 稀土元素地球化学[M]. 北京: 科学出版社, 1989.
WANG Zhonggang, YU Xueyuan, ZHAO Zhenhua. REE Chemistry[M]. Beijing: Science Press, 1989.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Liu D, Wang C, Zhang X, et al. Implications for the contribution of Pacific plate subduction to fluorite mineralization in Southeast China: evidence from Nanzhou large fluorite deposit, Fujian Province[J]. Ore Geology Reviews, 2023: 105385.
|
|
Möller P. On the geochemical fractionation of ram earth elements during the formation of Ca-minerals and its application to problems of the genesis of ore deposits[J]. The significance of trace elements in solving petrogenetic problems and controversies, 1983: 747-791.
|
|
|
Rollinson H R. Using geochemical data: evaluation, presentation, interpretation[M]. Routledge, 2014.
|
|
|
|
Taylor S R, McLennan S M. The continental crust: its composition and evolution[M]. London: Blackwell Scientific, 1985.
|
|
|
|
|
|
|
|
|
|
1. |
曾祥辉,孟德磊,曾闰灵,蒋起保,欧阳永棚. 北武夷上水桥萤石矿区黑云母石英二长岩成因:来自年代学及地球化学的制约. 高校地质学报. 2024(05): 559-576 .
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