相山矿田与冷水坑矿田多金属成矿特征对比

doi:10.11720/wtyht.2021.0362

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Abstract

More than 20 uranium deposits and polymetallic mineralization have been discovered in the Xiangshan ore field at present. However, breakthroughs in polymetallic prospecting are yet to be made in the ore field.This paper compared the Xiangshan ore field with the Lengshuikeng lead-zircon-silver polymetallic ore field at a high exploration level in terms of regional geological setting, strata, magmatic rocks, ore body characteristics, and wall-rock alteration. Based on this, it is found that the Xiangshan and Lengshuikeng ore fields are similar in geological conditions, the geochemical characteristics of rare earth elements (REEs) and trace elements, and the characteristics of ore bodies and alternation. Regarding lithology, both are mainly composed of volcanic rock series of the Cretaceous Ehuling and Daguding formations, which are present as high high-K calc-alkaline basalts and possess quasi-aluminous-weakly peraluminous characteristics. The REE-distribution patterns and trace element spider diagrams of the two ore fields are notably rightward, indicating the enrichment of light REEs, low content of Ba and Sr, and obvious Eu depletion. Therefore, the sediments in the two ore fields mainly originate from the crust. Meanwhile, the magmatic rocks feature a high crystallization differentiation degree, and the wall-rock alteration is dominated by chloritization, sericitization, silicification, and carbonation.By referring to the metallogenic model of the Lengshuikeng ore field, it is considered that the future polymetallic prospecting in the Xiangshan ore field should focus on the porphyry-type polymetallic ore in small rock masses and strata-bound, superimposed polymetallic ore at the K₁d¹ horizon. In this manner, breakthroughs are expected to be made in polymetallic prospecting in the Xiangshan ore field.

Key words： Xiangshan ore field Lengshuikeng ore field metallogenic characteristics lead-zircon-silver deposit polymetallic ore

Received: 27 June 2021 Published: 21 December 2021

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	Wen-Jing PANG
	Bei-Bei CHEN
	Tao ZHOU
	Rou-Rui HUANG
	Yun-Yun ZHOU
	Fu-Sheng GUO
	Zhi-Chun WU
	Cai-Fu XIE

Cite this article:

Wen-Jing PANG,Bei-Bei CHEN,Tao ZHOU, et al. A comparative study on polymetallic metallogenic characteristics of Xiangshan and Lengshuikeng ore fields[J]. Geophysical and Geochemical Exploration, 2021, 45(6): 1416-1424.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.0362 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I6/1416

Geotectonic location of Xiangshan and Lengshuikeng ore fields

Stratigraphic characteristics of Xiangshan and Lengshuikeng ore fields

8]
1—Quaternary; 2—upper Cretaceous Nanxiong formation; 3—upper part of the lower Cretaceous Ehuling formation; 4—lower part of the lower Cretaceous Ehuling formation; 5—upper part of the lower Cretaceous Daguding formation; 6—lower part of the lower Cretaceous Daguding formation; 7—Triassic Anyuan formation; 8—Carboniferous Huashanling formation; 9— Mesoproterozoic; 10—granite porphyry; 11—granite; 12—fault structure
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The geological map of Xiangshan ore field^[8]
1—Quaternary; 2—upper Cretaceous Nanxiong formation; 3—upper part of the lower Cretaceous Ehuling formation; 4—lower part of the lower Cretaceous Ehuling formation; 5—upper part of the lower Cretaceous Daguding formation; 6—lower part of the lower Cretaceous Daguding formation; 7—Triassic Anyuan formation; 8—Carboniferous Huashanling formation; 9— Mesoproterozoic; 10—granite porphyry; 11—granite; 12—fault structure

9]
1—Quaternary; 2—lower Cretaceous Ehuling formation; 3—lower Cretaceous Daguding formation; 4—Carboniferous Zishan formation; 5—upper Sinian Laohutang formation; 6—rhyolitic porphyry; 7—K-feldspar granite porphyry; 8—quartz syenite porphyry; 9—ore bearing granite porphyry; 10—cryptoexplosive breccia; 11—unconformity boundary; 12—fault; 13—exploration line
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The geological map of Lengshuikeng ore field^[9]
1—Quaternary; 2—lower Cretaceous Ehuling formation; 3—lower Cretaceous Daguding formation; 4—Carboniferous Zishan formation; 5—upper Sinian Laohutang formation; 6—rhyolitic porphyry; 7—K-feldspar granite porphyry; 8—quartz syenite porphyry; 9—ore bearing granite porphyry; 10—cryptoexplosive breccia; 11—unconformity boundary; 12—fault; 13—exploration line

11,12]
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Comparison of main element characteristics between volcanic-intrusive complex in Xiangshan ore field and intrusive in Lengshuikeng ore field^[11,12]

11,12]
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REE distribution patterns in Xiangshan and Lengshuikeng ore fields^[11,12]

11,12]
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Spider web map of standardized trace elements in primitive mantle of Xiangshanand Lengshuikeng ore fields^[11,12]

Types and characteristics comparison of Xiangshan Pb-Zn orebody and Lengshuikeng orebody

Profile of line 26 in Niutoushan area of Xiangshan ore field
1—upper part of the lower Cretaceous Ehuling formation; 2—upper part of the lower Cretaceous Daguding formation ; 3—lower part of the lower Cretaceous Daguding formation; 4— Mesoproterozoic; 5—drilling for construction; 6—polymetallic alteration range; 7—polymetallic ore body

9]
1—lower Cretaceous Ehuling formation; 2—lower Cretaceous Daguding formation; 3—Sinian Laohutang formation; 4—granite porphyry; 5—rhyolitic porphyry; 6—layered lead zinc silver ore body; 7—porphyry ore body; 8—inferred fault
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Profile of No.132 exploration line in Xiabao ore block of Lengshuikeng deposit^[9]
1—lower Cretaceous Ehuling formation; 2—lower Cretaceous Daguding formation; 3—Sinian Laohutang formation; 4—granite porphyry; 5—rhyolitic porphyry; 6—layered lead zinc silver ore body; 7—porphyry ore body; 8—inferred fault

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