Double-cross-shaped Distribution and Ore-controlling Characteristics of Structural Traces in Chaihulanzi Gold Deposit and Its Surrounding Area at Chifeng, Northern China

doi:10.19657/j.geoscience.1000-8527.2021.109

Geoscience ›› 2021, Vol. 35 ›› Issue (05): 1267-1273.DOI: 10.19657/j.geoscience.1000-8527.2021.109

Double-cross-shaped Distribution and Ore-controlling Characteristics of Structural Traces in Chaihulanzi Gold Deposit and Its Surrounding Area at Chifeng, Northern China

ZHANG Baolin¹^,²^,³(), LÜ Guxian⁴(), YU Jianguo¹^,²^,³, ZHANG Qipeng⁵, SHI Xiaoming⁵, WEI Junbin⁵, WANG Cuizhi⁶, BI Minfeng⁷, ZHANG Tengfei⁶, JIAO Jiangang⁸, LEI Wuchao⁸, SU Yanping⁹

1. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2. Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing 100029, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
5. Inner Mongolia Mining Development Co., Ltd., Hohhot, Inner Mongolia 010010, China
6. Zijin School of Geology and Mining, Fuzhou University, Fuzhou, Fujian 350108, China
7. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
8. School of Earth Sciences and Resources, Chang’an University, Xi’an,Shaanxi 710054, China
9. College of Resources, Environment and Planning, Dezhou University, Dezhou, Shandong 253023, China

Received:2021-07-01 Revised:2021-08-01 Online:2021-10-10 Published:2021-11-04
Contact: LÜ Guxian

Abstract

Abstract:

The Chaihulanzi gold deposit is located at the intersection of NNE-trending tectonic belt in the Great Hinggan Range and the EW-trending tectonic belt in the northern margin of North China Block. The Chaihulanzi, Lianhuashan, and Honghuagou gold deposits in the area have undergone multistage tectono-magmatic activity. Results of aeromagnetic and remote sensing data interpretation show four tectonic trending features (NNW, NWW, NNE and NEE) in the orefield, which constitute the double-cross-shaped structural pattern that controlled the emplacement of Late Paleozoic magmatic rocks (dikes) and gold mineralization. At Chaihulanzi, structural features of these four directions also form a double-cross-shaped pattern, which controlled the distribution of orebodies (mineralized zones) and geochemical anomaly zones. Both the orefield and ore-deposit tectonic features show the double-cross-shaped distribution characteristics, which demonstrate the magmatic and mineralization controled by different levels of the Neo-cathaysian tectonic system. Our findings provide an important foundation for studying metallogenesis and mineral prediction in the orefields.

Key words: Chaihulanzi gold ore field, tectonic system, double-cross-shaped structure, geomechanics, structure control of rocks and ores

CLC Number:

P548
P522

ZHANG Baolin, LÜ Guxian, YU Jianguo, ZHANG Qipeng, SHI Xiaoming, WEI Junbin, WANG Cuizhi, BI Minfeng, ZHANG Tengfei, JIAO Jiangang, LEI Wuchao, SU Yanping. Double-cross-shaped Distribution and Ore-controlling Characteristics of Structural Traces in Chaihulanzi Gold Deposit and Its Surrounding Area at Chifeng, Northern China[J]. Geoscience, 2021, 35(05): 1267-1273.

Figures/Tables 6

Fig.1 Geological map of Chaihulanzi gold ore field (modified from references [6,7])

Fig.2 Distribution map of four directional tectonic belts in Chaihulanzi mining district (according to mine data, revised)

Fig.3 Double-cross-shaped structural trace diagram demonstrated by remote sensing information of Chaihulanzi area (modified from reference[6], revised)

Fig.4 Sketch map showing the double-cross-shaped structure of the Neocathaysian tectonic system demonstrated by aeromagnetic data in the northern area of Chifeng

Fig.5 Double-cross-shaped structural belt demonstrated by the combined Au, Ag, As, W, Sb element geochemical anomaly in Chaihulanzi mining area (base map and geochemical information from reference[8], revised)

Fig.6 Sketch map of Neocathaysian tectonic system structure surface and its mechanical analysis [1]

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Double-cross-shaped Distribution and Ore-controlling Characteristics of Structural Traces in Chaihulanzi Gold Deposit and Its Surrounding Area at Chifeng, Northern China

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