Three-dimensional modeling and comprehensive quantitative mineral resources assessment: A case study of the Haoyaoerhudong gold deposit in Inner Mongolia

被引：0

作者：

Li N. ^{[1
]}

Cao R. ^{[1
,3
]}

Ye H. ^{[1
]}

Li Q. ^{[2
]}

Wang Y. ^{[1
]}

Lü X. ^{[2
]}

Guo N. ^{[1
,4
]}

Su Y. ^{[2
]}

Hao J. ^{[1
]}

Xiao Y. ^{[5
]}

Zhang S. ^{[1
,3
]}

Chu W. ^{[1
,3
]}

机构：

[1] MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing

[2] Inner Mongolia Pacific Mining Co., Ltd., Wulatezhongqi

[3] Graduate School of China University of Geosciences(Beijing), Beijing

[4] School of Management Science, Chengdu University of Technology, Chengdu

[5] Sichuan Institute of Metallurgical Geology and Exploration, Chengdu

来源：

Earth Science Frontiers | 2021年 / 28卷 / 03期

关键词：

3D deep prediction; 3D modeling; Anomaly extraction; Black rock series gold mine; Synthetic metallogenic prognosis;

D O I：

10.13745/j.esf.sf.2021.1.23

中图分类号：

学科分类号：

摘要：

The low-grade Haoyaoerhudong gold deposit in the Urad Middle Banner, Inner Mongolia, China is one of the largest gold deposit in the northern margin of the North China Craton. The gold orebodies are hosted by carbonaceous slate in the Bilute Formation of the Mesoproterozoic Bayan Obo Group. To enhance security of national gold mineral reserves, we conducted gold prospecting in the Haoyaoerhudong gold deposit through examinations of ore geology, lithology, metallotectonic system, and mineralization indicators. First we constructed a 3D prediction model for the Haoyaoerhudong gold deposit by 3D modeling. Next, inverted CSAMT data were used to interpret and redefine the structural framework of the orefield, including the Haoyaoerhudong syncline-a major ore-controlling structure. From the above results, predictor variables were extracted-such as the shear zone on the south side of the Haoyaoerhudong syncline, the Bilute carbonaceous slate, and the ore-controlling structure and geochemical and alteration indicators of the east pit-and an integrated 3D geological anomaly model was constructed. Finally, the weight of evidence (WOE) method was used to target the favorable deep gold mineralization areas. Our study demonstrates that the high susceptibility value area is the Halahoghous Formation (H3), into which magmatic rocks intruded and filled from both sides along the larger shear fault zone in the form of dikes while carbonaceous slates provided a chemical barrier for gold orebody. Based on the WOE result, we targeted the favorable deep ore field at the east section of the south side of the Haoyaoerhudong syncline. In addition, contrast analysis of montmorillonite prediction variables using WOE provided quantitative verification to show that geological inference of filling and metasomatism under geological structural controls is one of the most important formation mechanism of the Haoyaoerhudong gold deposit. © 2021, Editorial Office of Earth Science Frontiers. All right reserved.

引用

页码：170 / 189

页数：19

共 53 条

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