Volume 25 Issue S1
May  2019
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Article Navigation >  Journal of Geomechanics  > 2019  >  25(S1): 145-149
SUN Zhenyi, BAI Hao, FANG Ye, et al., 2019. MAIN ORE-CONTROLLING STRUCTURAL CHARACTERISTICS AND PROSPECTING MODEL OF MADAGASCAR GRAPHITE DEPOSIT. Journal of Geomechanics, 25 (S1): 145-149. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.025
Citation: SUN Zhenyi, BAI Hao, FANG Ye, et al., 2019. MAIN ORE-CONTROLLING STRUCTURAL CHARACTERISTICS AND PROSPECTING MODEL OF MADAGASCAR GRAPHITE DEPOSIT. Journal of Geomechanics, 25 (S1): 145-149. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.025
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MAIN ORE-CONTROLLING STRUCTURAL CHARACTERISTICS AND PROSPECTING MODEL OF MADAGASCAR GRAPHITE DEPOSIT

doi: 10.12090/j.issn.1006-6616.2019.25.S1.025

  • China University of Geosciences (Beijing), Beijing 100083, China

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  • Published: 2019-05-01
    Abstract
  • Madagascar graphite deposits are mainly distributed in the Middle-East and south of Madagascar Island. There are abundant types of graphite deposits and favorable metallogenic geological conditions in this area, which have good prospecting prospects. The comprehensive study shows that the metallogenesis of graphite deposits has gone through three stages: Neoarchean to Neoproterozoic sedimentation, metamorphic deformation and magmatic superimposition and transformation. The study of ore-controlling structure shows that the central graphite deposit is mainly controlled by metamorphic schistosity transformed by tight isoclinal folds, with thin wings and thick hinge zone. The eastern graphite deposits are controlled by shear zones of synclinal folds and metamorphic schistosities, and are enriched by hydrothermal superimposition of later migration along brittle faults. The southern graphite deposit extends steadily due to the influence of deep shear deformation zone. Based on the study of ore-controlling structures, a regional prospecting model for graphite deposits is proposed, in which the main body is "zonal composite-magmatic superimposition". Based on the existing spatial and temporal distribution of mineralization and metallogenic conditions, four major metallogenic prospects in Madagascar are divided in this paper.

     

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