Welcome to visit Geoscience!

Geoscience ›› 2024, Vol. 38 ›› Issue (04): 934-946.DOI: 10.19657/j.geoscience.1000-8527.2024.085

• Ore-controlling Mechanism and Exploration Applications of Tectono-physicochemistry • Previous Articles     Next Articles

Interpretations of Geochemical Exploration Data in Overburden Area Based on Tectonic Deformation Lithofacies Belt and Their Applications: A Case Study of the Jinxiu Nickel-Cobalt Polymetallic Ore Field in Guangxi,China

ZHANG Baolin1,2,3(), LÜ Guxian4, SHEN Xiaoli5, ZHANG Zhuang6, CAO Mingjian1,2,3, HUANG Xinshuo1,2,3, SU Yanping7, JIA Wenchen8   

  1. 1. Key Laboratory of Mineral Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China
    2. Innovation Academy for Earth Science,CAS,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. School of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China
    6. Chifeng Chaihulanzi Gold Mining Co.Ltd.,Chifeng, Inner Mongolia 024005,China
    7. College of Ecology,Resources and Environment,Dezhou University,Dezhou, Shandong 253023,China
    8. Beijing Technology Consulting Branch,China Railway Resources Group Co.Ltd,Beijing 100070,China
  • Online:2024-08-10 Published:2024-10-16

Abstract:

The geochemical exploration data in covered areas are complicated and challenging to interpret,therefore,calling for strengthened constraints on structural ore-controlling factors.The outcroping extent of tectonic traces in various types of overlying areas varies,making it essential to extract distribution information of ore-bearing tectonic deformation lithofacies belts from multiple levels of the tectonic systems.Based on the evolutionary characteristics of the geomechanical tectonic system,a novel approach is proposed to identify favorable ore-bearing structure trends in overlying area,and to interpret metallogeny from geochemical exploration data,and to delineate prospecting more efficiently target areas.Firstly,the structural traces of ore field and the metallogeny of hydrothermal deposits are interpreted using known geological,remote sensing,and geophysical data.Secondly,the direction of principal stress can be determined based on the characteristics of the tectonic stress field during the mineralization period.Thirdly,the tensional-shear and tensional-tectonic deformation lithofacies belts can be identified as favorable ore-bearing structures.Finally,based on the data processing results,the anomalous area for ore prospecting is identified.This method has been applied to the Jinxiu nickel-cobalt polymetallic ore field in Guangxi,identifying two main ore-bearing structural directions.The NWW-EW-NEE and NW-NNW trending fractures were formed in different periods.These fractures controlled nickel-cobalt polymetallic veins enriched in arsenide and sulfide,respectively.This method and prospecting approach can be further promoted in mineral exploration in covered areas.

Key words: overburden area, geochemical exploration, tectonic deformation lithofacies, tectonic system, prospecting prediction, Jinxiu,Guangxi

CLC Number: