湖南香花岭矿田中细晶岩型锂矿资源找矿潜力分析

doi:10.11720/wtyht.2024.1040

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Abstract

This study aims to explore the distribution characteristics and occurrence patterns of lithium in medium-fine-grained rocks and its paragenetic or associated relationship with minerals such as tungsten, tin, niobium, tantalum, beryllium, and rubidium. Hence, it analyzed the distribution characteristics and diagenetic and metallogenic processes of nonferrous-rare metals in the Xianghualing orefield. With the exposed granitic rock masses as the center, this study divided three ore-forming sections of rare metal lithium, i.e., the Laiziling-Nanjichong, Jianfengling-Xianghuapu, and Tongtianmiao-Yaoshanli ore-forming sections. Moreover, lithium-rich mineralized bodies were discovered in the medium-fine-grained rocks of the former two ore-forming sections. Lithium converges and accumulates in the interior and top of medium-fine-grained granitic rock masses, at the automorphism and alteration positions of high-emplacement apophyses and vein fronts and edges, or in the areas enclosed by silicon-rich quartz veins at the contact zone with silicon-rich surrounding rocks. Dividing these mineralization and alteration sections serves as a crucial approach for exploring medium-fine-grained rock type lithium ore bodies in the Xianghualing orefield.

Key words： medium-fine-grained rock type rare metal lithium resource prospecting potential analysis Xianghualing orefield

Received: 31 January 2023 Published: 16 April 2024

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	Zhi-Fang SONG
	Qi-Zhi YANG
	Zhen-Zhen ZHU
	Neng-Wen CAO

Cite this article:

Zhi-Fang SONG,Qi-Zhi YANG,Zhen-Zhen ZHU, et al. Prospecting potential of medium-fine-grained rock-type lithium resources in the Xianghualing orefield, Hunan Province, China[J]. Geophysical and Geochemical Exploration, 2024, 48(2): 366-374.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.1040 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I2/366

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1—Himalayan structural layer;2—Yanshanian structural layer;3—Variscan-Indochian structural layer;4—Caledonian structural layer; 5—granite;6—quartz porphyry;7—Nb-Ta deposit;8—beryllium deposit;9—lithium deposit;10—tungsten deposit;11—tin deposit;12—lead-zinc deposit;13—alluvial tin deposit;14—measured fault;15—presumed fault;16—place names;17—range of lithium metallogenic area
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Schematic diagram of geology and mineral distribution of Xianghualing orefield(based on the data of Hunan Metallurgical 238 Exploration Team ^[6])
1—Himalayan structural layer;2—Yanshanian structural layer;3—Variscan-Indochian structural layer;4—Caledonian structural layer; 5—granite;6—quartz porphyry;7—Nb-Ta deposit;8—beryllium deposit;9—lithium deposit;10—tungsten deposit;11—tin deposit;12—lead-zinc deposit;13—alluvial tin deposit;14—measured fault;15—presumed fault;16—place names;17—range of lithium metallogenic area

Geochemical anomaly characteristics in Xianghualing orefield

Distribution diagram of element geo-chemical enrichment field in Xianghualing orefield
1—Be、Nb、Li、F enrichment field;2—W、Sn、(Li)、Bi、Mo enrichment field;3—Pb、Zn、Ag enrichment field;4—Sb、As、Au enrichment field

Distribution diagram of lithium ore resources in Xianghualing orefield
1—Quaternary;2—Cretaceous;3—upper Permian Dalong Formation;4—upper Permian Longtan Formation;5—lower Permian Dangchong Formation;6—lower Permian Qixia Formation;7—Hutian group of middle-upper Carboniferous system;8—lower Carboniferous Zimenqiao Formation;9—lower Carboniferous Ceshui Formation;10—lower Carboniferous Shidengzi Formation;11—lower Carboniferous Menggong'ao Formation;12—upper Devonian Xikuangshan Formation;13—upper Devonian Shetianqiao Formation;14—middle Devonian Qiziqiao Formation;15—middle Devonian Tiaomajian Formation;16—Cambrian;17—middle/late Yanshanian granite;18—granite porphyry;19—measured/presumed fault;20—fault and its number;21—measured/presumed stratigraphic boundary;22—unconformity boundary;23—stratum occurrence;24—skarnization;25—quartz vein;26—range of lithium metallogenic area

Microscopic picture of rocks and minerals
a—×28, fibrous lithium-containing muscovite (Li₃) is accounted for by quartz(Q) crystallized later; b—×80, lepidolite (Li₄) accounts for quartz(Q), TOP is topaz, and Se is sericite; c—×80, albite (Ab₂) metasomatic lithium-containing muscovite (Li₃), and fine spar (Mio) wrapped in lithium-containing muscovite (Li₃); d—×80, microclinic-microcrystal feldspar (K₂) metasomatism lithium-containing muscovite (Li₃); e—×28, greisen-mineralized potassium-sodium granite; f—×25, yellow-green fine spar; g—×28, black fine spar; h—×40, tan fine spar

Characteristics of lithium mine formation section in Xianghualing orefield

Sampling photos of fine-grained granite in the drilling cores

Analysis results of fine crystalline rock lithium mine samples in Xianghualing orefield

Field specimen photos of fine granite and cloutzite ore in the surface

Analysis results of major quantities and rare elements of various samples in Xianghualing

Distribution diagram of the relationship between Li content and Si, Ca content in different lithology and ores in Xianghualing orefield
1—biotite granite; 2—coarse grained granite; 3—quartzite; 4—silicified sandstone; 5—skarn; 6—scheelite;7—raw ore in fault zone; 8—tungsten-tin ore; 9—fluorite mine

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