3D geological modeling for prediction of subsurface Mo targets in the Luanchuan district, China

Wang, Gongwen, Li, Ruixi, Carranza, Emmanuel John M., Zhang, Shouting, Yan, Changhai, Zhu, Yanyan, Qu, Jianan, Hong, Dongming, Song, Yaowu, Han, Jiangwei, Ma, Zhenbo, Zhang, Hao, and Yang, Fan (2015) 3D geological modeling for prediction of subsurface Mo targets in the Luanchuan district, China. Ore Geology Reviews, 71. pp. 592-610.

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Abstract

Three-dimensional (3D) district-scale geoscience information for the Luanchuan Mo district was integrated for understanding the development of its regional geology and ore-forming processes and for decision-making about potential targets for mineral exploration. The methodology and datasets used were: (1) construction of an initial geological model (25 km × 20 km × 2.5 km) using 1:10,000 scale geological map, nine geological cross-sections and gravity and magnetic data; (2) construction of three large-scale Mo deposits model (5 km × 4 km × 2.5 km) using 1:2000 scale geological and topographic maps, 288 boreholes (total core length of 158,700 m), and 32 1:2000 scale cross-sections; (3) 3D inversion of 1:25,000 scale gravity and magnetic data for identification metallogenic anomaly zones which are associated with Jurassic intrusions; (4) extraction of ore-controlling formation and sequence of the Luanchuan Group using the large-scale 3D models of Mo deposits and results of analysis of lithogeochemical samples from outcrops and borehole cores; (5) identification of ore-forming and ore-controlling faults using the large-scale 3D model of Mo deposits and mineralized Jurassic granite porphyry stocks; (6) boost weights-of-evidence and concentration–volume (C–V) fractal analyses to integrate metallogenic information and to identify and classify potential Mo targets. Four classes of exploration targets were identified using C–V modeling and 3D known orebodies model: the first and second class targets are mainly located in three large magma-skarn type deposit camps, occupying ~ 1.4 km^3 with total estimated reserve of ~ 2.3 Mt; the third class targets, which are mainly located in Huangbeiling and Yuku deposit camps comprising concealed magma-skarn type deposits, occupy ~ 2.8 km^3 and represent a new target exploration zone in the Luanchuan district; the fourth class targets, which are located in the Huoshenmiao, Majuan, and Daping zones, occupy ~ 15 km^3 and represent potential mineral resources with likely similar orebody features as the Yuku deposit.

Item ID: 40024
Item Type: Article (Research - C1)
ISSN: 1872-7360
Keywords: 3D geological modeling; 3D weights of evidence; fractal analysis; subsurface Mo targets; Luanchuan district
Funders: Ministry for Science and Technology of China (CMSC), Ministry of Land and Resources of China (MLRC), China University of Geosciences (CUG)
Projects and Grants: CMSC Grant No. 2011BAB04B06, MLRC Grant No.201111007, CUG Grant No. 2-9-2012-143, CUG Grant No. GPMR2011
Date Deposited: 13 Aug 2015 02:42
FoR Codes: 04 EARTH SCIENCES > 0403 Geology > 040307 Ore Deposit Petrology @ 30%
08 INFORMATION AND COMPUTING SCIENCES > 0899 Other Information and Computing Sciences > 089999 Information and Computing Sciences not elsewhere classified @ 70%
SEO Codes: 84 MINERAL RESOURCES (excl. Energy Resources) > 8401 Mineral Exploration > 840199 Mineral Exploration not elsewhere classified @ 100%
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