Based on the data on the geology, minerals, exploration, and geochemistry of more than 30 fluorite deposits in the Heyu-Checun area, western Henan Province, this study summarized the types, spatial distribution, and geochemical characteristics of fluorite deposits in the area and explored the genesis and material sources of the deposits. The fluorite deposits in this area have simple types and are distributed in Yanshanian granites and along the fault zone of the external contact zone of the granites. The formation ages of the Heyu and Taishanmiao plutons are 124.7~148.2 Ma and 115~123.1 Ma, respectively. The mineralized age of fluorites is 120~126.8 Ma, indicating that the mineralization occurred in the late stage of the intrusion of the Heyu pluton and the early stage of the intrusion of the Taishanmiao pluton. The ore-forming fluids belong to the NaCl-H2O system with a medium-low temperature, a low salinity, and a low density, indicating that the deposits in the area are medium-low-temperature supergene hydrothermal fluorite deposits. The chondrite-normalized REE patterns of fluorites in the area can be divided into slightly leftward, flat, and rightward types dominated by the rightward type. Moreover, the rightward chondrite-normalized REE patterns of fluorites are similar to those of the Yanshanian granites, both showing strongly negative Eu anomalies and weakly negative Ce anomalies. This finding indicates that the Yanshanian granites provide materials for the formation of fluorites. The metallogenic element F may mainly originate from the Heyu and Taishanmiao plutons, while the metallogenic element Ca partly comes from granites as surrounding rocks.
张凯涛, 白德胜, 李俊生, 刘纪峰, 许栋, 苏阳艳, 樊康. 豫西合峪—车村地区萤石矿床地质特征及物质来源研究进展[J]. 物探与化探, 2022, 46(4): 787-797.
ZHANG Kai-Tao, BAI De-Sheng, Li Jun-Sheng, LIU Ji-Feng, XU Dong, SU Yang-Yan, FAN Kang. Research progress in the geological characteristics and material sources of fluorite deposits in the Heyu-Checun area, western Henan Province. Geophysical and Geochemical Exploration, 2022, 46(4): 787-797.
Feng S P, Wang J H, Liu Y W, et al. Geochemical characteristics and indicative significance of rare earth elements in Yangshan fluorite deposit in western Henan province[J]. Chinese Rare Earths, 2020, 41(5):50-58.
Pang X C, Si Y Y, Liu J F, et al. Sm-Nd isotopic dating and geological significance of Kangda fluorite deposit in Songxian County of Henan Province[J]. Bulletin of Mineralogy,Petrology and Geochemistry, 2019, 38(3):534-538.
Yang D C, Meng F, Bai D S, et al. Report on the whole loading exploration of fluorite ore in Heyu area,Luoyang City, Henan Province[R]. Zhengzhou: No.2 Institute of Geological & Mineral Resources Survey of Henan, 2021.
张宗清, 张国伟, 唐索寒. 南秦岭变质地层同位素年代学[M]. 北京: 地质出版社, 2002.
Zhang Z Q, Zhang G W, Tang S H. Isotopic geochronology of metamorphic strata in South Qinling[M]. Beijing: Geological Publishing House, 2002.
Li Y F. The temporal-spital evolution of Mesozoid granitoids in the Xiong’ershan area and their relationships to molybdenum-gold mineralization[D]. Beijing: China University of Geosciences, 2005.
Han Y G, Zhang S H, Franco P, et al. Evolution of the Mesozoic granites in the Xiong'ershan-Waifangshan Region,Western Henan Province,China,and its tectonic implications[J]. Acta Geologica Sinica, 2007, 81(2):253-265.
Guo B, Zhu L M, Li B, et al. Zircon U-Pb age and Hf isotope composition of the Huashan and Heyu granite plutons at the southern margin of North China Craton:Implications for geodynamic setting[J]. Acta Petrologica Sinica, 2009, 25(2):265-281.
Li C Y, Lyu X H, Li R Q, et al. 1∶50 000 regional geological and mineral survey report of Heyu(I49E013016),Muzhijie(I49E013017),Lishujie(I49E014016),Checun(I49E014017) and Erlaongmiao(I49E014018)in Henan Province[R].Zhegzhou:Henan Geological Survey Institute, 2016.
Bao Z W, Xiong M F, Li Q. Mo-rich source and protracted crystallization of Late Mesozoic granites in the East Qinling porphyry Mo belt (central China):Constraints from zircon U/Pb ages and Hf-O isotopes[J]. Journal of Asian Earth Sciences, 2018, 160:322-333.
Pang X C, Li W M, Liu J F, et al. Fluid inclusion and geological significance of Chenlou fluorite deposit in Songxian county,Henan province[J]. Journal of Henan Polytechnic University:Natural Science, 2019, 38(1) :45-53.
Wang J Q, Zhu L M, Guo B, et al. Characteristics of Sr-Nd and Pb isotopic composition and its geological significance of granitic plutons inthe Huashan,Laoniushan and Heyu area at the southern margin of north China Craton[J]. Mineralogy and Petrology, 2015, 35(1):63-72.
Shi C Y, Yan M C, Liu C M, et al. Abundances of chemical elements indifeerent rock types of the granetoids of china and its characteristics[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2005, 27(3):256-262.