烃汞叠加晕找矿法在湖南沃溪金矿红岩溪矿段勘查中的应用及工程验证

doi:10.11720/wtyht.2022.1138

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Abstract

To further verify the feasibility of the hydrocarbon-mercury superimposed halo method in the coverage area of red beds in prospecting deep deposits, this study carried out area tests of hydrocarbon-mercury superimposed halo in 4.3 km² of coverage area of Cretaceous red beds in the Hongyanxi ore block using a grid density of 160 m × 20 m. The following conclusions were drawn by summarizing the characteristics of the anomalies of metallogenic elements and hydrocarbon-mercury components in the soil in the red beds, including their superposition characteristics, field structures, patterns, spatial correspondence, and planar distribution patterns. ① There are deep-source and syngenetic superimposed fields in the soil geochemical field of red beds in the Hongyanxi ore block; ② Along the strikes of ore veins, syngeneic superimposed anomalies correspond to barren sections, while the deep-source superimposed anomalies correspond to ore sections. Along the dip directions of ore veins, the ore bodies under the control of paired bimodal anomaly mode occur in ore sections, while other ore bodies occur in barren sections; ③ Planarly, the distribution direction of zonal anomalies consisting of anomalies in the head and tail parts of the paired bimodal anomaly pattern is the pitch directions of orebodies. The superposition of different zonal anomalies indicates the occurrence of parallel blind veins in deep parts. These conclusions were verified in deep engineering, indicating ideal prediction results.

Key words： hydrocarbon-mercury superimposed anomaly coverage area of red beds prospecting test Woxi gold deposit Hongyanxi

Received: 12 March 2021 Published: 28 June 2022

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	Hai-Long CHEN
	Qi-Peng XIAO
	Zhi-Bin XU
	Hai-Yan YANG
	Ju-Hong LIANG
	Da-Gai YIN

Cite this article:

Hai-Long CHEN,Qi-Peng XIAO,Zhi-Bin XU, et al. Application of hydrocarbon-mercury superimposed halo method in red beds:A case study of the Woxi gold deposit, Hunan Province[J]. Geophysical and Geochemical Exploration, 2022, 46(2): 323-336.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1138 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I2/323

Simplified map of geological structure
1—Yanshan structure layer;2—Wuling structure layer;3—Xuefeng-Calidon structure;4—unconformity boundary;5—reverse fault;6—unknown fault;7—nappe fault;8—deformation zone boundary;9—ductile and brittle fault;10—anti-“S” type structural belt;11—anticline;12—syncline;13—reverse syncline;14—speculative anticline;15—fault number;16—fold number

Cross section of Line-131 in Hongyanxi Au deposit
1—Cretaceous; 2—Wuqiangxi formation;3—Madiyi formation;4—graywacke;5—slate;6—unconformity line;7—fault and number;8—vein and number;9—alterated rock

Anomaly classification features

Relevant parameters of indicators in soil of T4 line

Relevant parameters ofindicators in soil of T8 line

General graph of R-type cluster analysis of T4

General graph of R-type cluster analysis of T8

Factor analysis results

Geochemical section of T8 line in Hongyanxi ore-block
1—Cretaceous;2—Wuqiangxi Formation;3—Madiyi Formation;4—slate;5—glutenite;6—unconformity contact boundary;7—actual and inferred faults and numbers;8—actual and inferred alteration zone and number;9—orevein and number;10—grade(10^-6)/thickness(m);11—methane;12—ethane and propane;13—isobutane, n-butane, isopentane, n-pentane;14—ethylene;15—acrylic

Geochemical profile of T4 line in Hongyanxi ore-block
1—Cretaceous;2—Wuqiangxi formation;3—middle section of Madiyi formation;4—slate;5—sandy slate;6—glutenite;7—unconformity contact boundary;8—actual and inferred faults and numbers;9—actual and inferred alteration zone and number;10—orevein and number;11—grade(10^-6)/thickness (m);12—methane;13—ethane and propane;14—isobutane, n-butane, isopentane, n-pentane;15—ethylene;16—acrylic

Comprehensive anomaly of Hydrocarbon-mercury in Hongyanxi ore block
1—Quaternary;2—Cretaceous;3—Sinian;4—Wuqiangxi formation;5—Madiyi formation;6—alteration zone and number;7—measured and inferred strata boundary;8—unconformity interface;9—Fault;10—discovery ore boreholes;11—low grade drilling;12—barren boreholes;13—metallogenic prediction area

Deep metallogenic prediction in Hongyanxi ore block and engineering verification test

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