河南省方城县莫沟萤石矿床地质特征及成因

doi:10.11720/wtyht.2024.2588

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Abstract

The Mogou fluorite deposit of Fangcheng County, residing in the Neoproterozoic Meiyaogou Formation, is a crucial part of the fluorite metallogenic belt in southern Henan Province. Based on the analysis of the geological characteristics of the Mogou fluorite deposit, this study conducted petrographic and petrogeochemical studies to define the source of ore-forming materials and probe into the genetic mechanism of the fluorite deposit. The results show that the fluorite ore body is veined or lenticular, with mineralization-related alterations composed of silicification, fluorite and sericite alterations. Its ore structures are primarily massive, followed by banded, striped, and brecciated types. The chondrite-normalized rare earth element distribution pattern of the fluorite ore body is similar to that of the Meiyaogou Formation marbles and the Yanshanian porphyritic plagiogranites, suggesting a genetic relationship. The possible genetic mechanism is that the F-enriched ore-bearing hydrothermal liquids intruded along the interbedded fault and reacted with the surrounding rocks to form the fluorite ore /mineralized body. The deposit belongs to the epithermal filling type along the interbedded structure.

Key words： fluorite deposit deposit characteristics rare earth element ore-forming materials origin metallogenetic mode

Received: 27 November 2022 Published: 26 February 2024

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	Qing-Song ZHANG
	Ming-Zhe XIA
	Chun-Lian WANG
	Ke-Kun LI
	Zeng-Zheng LIU
	Ji-Yong JIANG
	Jian-Lang JIANG

Cite this article:

Qing-Song ZHANG,Ming-Zhe XIA,Chun-Lian WANG, et al. Geological characteristics and origin of the Mogou fluorite deposit in Fangcheng County, Henan Province[J]. Geophysical and Geochemical Exploration, 2024, 48(1): 15-23.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.2588 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I1/15

Geology (a) and regional structure (b) of Mogou area,Fangcheng County, Henan Province

Geological profile of exploration line 2 in Mogou fluorite mining area

Fluorite ore and its microscopic characteristics in Mogou area, Fangcheng County
a—filling fluorite ore along cracks; b—massive fluorite ore; c—purple fluorite and its deformation characteristics of surrounding rock;d—white banded fluorite and Molybdenite developed along fractures; e—striped fluorite in the borehole; f—banded fluorite, single polarized;g—banded fluorite deformation, orthogonal polarization;Fl—fluorite;Mot—molybdenite;Ms—muscovite;Cal—calcite;Phl—phlogopite;Qz—quartz

Results of trace element analysis of Mogou fluorite deposit,Fangcheng County 10^-6

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Spider map of trace elements of Mogou fluorite mine in Fangcheng County(standardized data by Sun et al.^[17])

Trace element analysis results and characteristic values of Mogou fluorite deposite,Fangcheng County 10^-6

17],XT11 is Yanshan period porphyry plagiogranite, data quoted from Henan Department of Geology and Mineral Resources ^[21])
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Spider web of rare earth elements in fluorite deposits in Mogou area,Fangcheng County(standardized data by Sun et al^[17],XT11 is Yanshan period porphyry plagiogranite, data quoted from Henan Department of Geology and Mineral Resources ^[21])

[w(La)+w(Y)]-w(Y)/w(La) relation of fluorite mine in mogou area,Fangcheng County

w(Y)/w(Ho)-w(La)/w(Ho) relation of fluorite mine in mogou area,Fangcheng County

Metallogenic model of fluorite deposit in Mogou area, Fangcheng County

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