构造原生晕在攻深找盲中的应用——以赣南银坑牛形坝铅锌金银矿床为例

doi:10.11720/wtyht.2023.2625

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Abstract

The Niuxingba plumbum-zinc-gold-silver deposit (the Niuxingba deposit) occurs in the Yinkeng ore field at the intersection of the EW-trending Nanling metallogenic belt and the NNE-striking Wuyishan metallogenic belt. It is a typical hydrothermal vein deposit under the strict control of fault structures, with ore bodies occurring as vein groups. To predict the deep prospecting potential of the No. V31 major ore belt (body) of the Niuxingba deposit, this study systematically investigated the axial (vertical), transverse, and longitudinal geochemical characteristics and zoning of tectonic primary halos of the ore belt (body) based on the geological characteristics of the deposit. Then, this study determined the axial zoning sequence and the geological-geochemical model of tectonic primary halos. It was confirmed that this model was correct, reasonable, and reliable using the multivariate statistical method. The results of the geological-geochemical model show that: ① the front halo of the Niuxingba deposit has F as the indicator element; ② the near-ore halo has two types of indicator elements: the gold mineralization-related As-Au element association in the middle and upper parts of the ore body and the Pb-Zn-Ag mineralization-related Hg-Zn-Pb-Ag-Cu-Bi-Sb element association in the middle part of the ore body; ③ the rear halo has the Mo-Cr-Co-Ni element association as indicator elements; ④ the anomaly centers of the front, near-ore, and rear halos are about 200~300 m apart axially, suggesting significant coexistence of front and rear halos and the presence of inflection points of the near-ore halo broken line. Furthermore, the transformation of low-moderate-temperature Pb-Zn-Ag-Au mineralization into moderate-high-temperature Cu-Zn mineralization occurs eastward. These characteristics indicate that the No. V31 main ore belt (body) has a pitch direction of east and a large extension toward the deep part (to an elevation of -200 m at least), implying that blind ore bodies may occur. As verified by deep drilling in the eastern concealed area (the lowest ore-controlled elevation of the No. 367 survey line: -165 m), the eastern deep part of the No. V31 ore belt (body) has a high potential for increasing reserves.

Key words： deep prospecting tectonic primary halo metallogenic prediction Niuxingba plumbum-zinc-gold-silver deposit Yinkeng southern Jiangxi

Received: 19 November 2021 Published: 11 October 2023

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	Wei CHEN
	You TAN
	Zheng-Duan CAO
	Zhi-Quan LIAO
	Ning-Fa ZHANG
	Hai-Hui FU

Cite this article:

Wei CHEN,You TAN,Zheng-Duan CAO, et al. Application of tectonic primary halos in the exploration of deep concealed ore bodies: A case study of the Niuxingba plumbum-zinc-gold-silver deposit in Yinkeng, southern Jiangxi[J]. Geophysical and Geochemical Exploration, 2023, 47(4): 892-905.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.2625 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I4/892

Diagram of geological mineral resources (b) and tectonic location (a) of Yinkeng ore field in Jiangxi Province
1—upper Cretaceous Zhoutian formation;2—upper Cretaceous Maodian formation;3—middle Jurassic Luo'ao formation;4—upper Permian Leping formation;5—middle and lower Permian strata;6—upper Carboniferous Dapu formation;7—lower Carboniferous Zishan formation;8—middle-upper Devonian Xiashan group;9—lower Cambrian Niujiaohe formation;10—upper Sinian Laohutang formation;11—lower Sinian Bali formation;12—upper Nanhua system Shaba huang formation;13—lower Nanhua system Shangshi formation;14—upper Qingbaikou system Kuli formation;15—Cretaceous andesite;16—third stage of Jurassic granite;17—second stage of Jurassic granite;18—first stage of Jurassic granite;19—Triassic granite;20—second stage of Silurian granites;21—first stage of Silurian granites;22—first stage of Silurian quartz diorite;23—rock strata attitude;24—fault of unknown nature;25—inferred fault;26—boundary of unconformity;27—observed geologic boundary;28—lead zinc ore;29—tungsten ore;30—gold ore;31—silver ore;32—manganese ore;33—pyrites;34—range of Yinkeng ore field

Geological diagram of Niuxingba Pb-Zn-Au-Ag polymetallic deposit in Yinkeng
1—Quaternary Holocene-Pleistocene;2—lower Cretaceous Shixi formation;3—middle Jurassic Luo'ao formation;4—middle Permian Chetou formation;5—middle Permian Xiaojiangbian formation;6—middle Permian Qixia formation;7—upper Nanhua system Shabahuang formation;8—lower Nanhua system Shangshi formation;9—upper Qingbaikou system Kuli formation;10—dioritic porphyrite;11—granite porphyry;12—granodiorite-porphyry;13—quartz porphyry;14—cryptoexplosive breccia;15—fault structure and occurrence;16—thrust nappe structure;17—geological boundary;18—lead,zinc,gold and silver ore bodies;19—siliceous dolomite lead-zinc zone;20—attitude of stratum;21—exploration line and No.;22—completed borehole

Comprehensive geological profile of east-west nearly vein-type ore belt (body)in Niuxingba mining area, Yinkeng
1—middle Jurassic Luo'ao formation;2—upper Qingbaikou system Kuli formation;3—mudstone,fine sandstone;4—slate,metatuff;5—granite porphyry;6—quartz porphyry;7—granodiorite-porphyry;8—ore zone (body) and number;9—fracture and number;10—gallery;11—borehole

Zonation of concentration of primary halo elements in V31 ore body (ore belt) in Niuxingba deposit

Zonation diagram of axial(vertical)primary halo element concentration in exploration line 308 of V31 orebody in Niuxingba deposit
1—upper Qingbaikou system Kuli formation;2—early Yanshanian granitic porphyry;3—fault structure;4—ore body and number;5—middle section and elevation of gallery;6—borehole number and hole depth;7—sampling point position

Zonation index of halo-forming elements and axial mineralization in exploration line 308 in Niuxingba deposit

Geological-geochemical profile of the transverse primary halo in the middle section of -20 m of V31 orebody in exploration line 303 in Niuxingba deposit
1—silty tuff;2—tuffaceous phyllite;3—granodiorite-porphyry;4—lead,zinc,gold and silver ore bodies and number;5—fracture zone;6—conductor number and bearing (slope angle);7—occurrence;8—primary halo sample and number;9—silicification

Geological-geochemical profile of longitudinal primary halo in the middle section of -20 m of V31 orebody in Niuxingba deposit

Correlation coefficient matrix of ore-halo forming elements in Niuxingba deposit

R-type cluster analysis pedigree diagram of mineralization-forming halo of V31 ore belt (body) in Niuxingba deposit

Maximum variance rotating orthogonal factor

The geological-geochemicalmodel of tectonicprimary halo in Niuxingba Pb-Zn-Au deposit
1—silty tuff;2—tuffaceous phyllite;3—granodiorite-porphyry;4—silicification crushing zone;5—ore body;6—near-halo anomaly;7—leading edge halo anomaly;8—tail halo anomaly

Schematic diagram of axial zonation of primary halo in V31 orebody in Niuxingba deposit
1—upper Qingbaikou system Kuli formation;2—early Yanshanian granitic porphyry;3—ore body and number;4—middle section and elevation;5—borehole number and hole depth;6—known/predicted ore bodies;7—near-halo anomaly;8—leading edge halo anomaly;9—tail halo anomaly

The ore discovery of deep drilling engineering of exploration line 367 in Niuxingba deposit
1—Quaternary system;2—lower Nanhua system Shangshi formation;3—early Yanshanian granodiorite-porphyry;4—ore body and number

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