Occurrence State and Ore-forming Regularity of Critical Metal Cobalt in the Changsha-Pingjiang Fault Zone，Northeastern Hunan Province

Zhilin WANG; Yang WU; Deru XU; Shaohao ZOU; Guojun DONG; Erke PENG; Juntao NING; Bo KANG

doi:10.11872/j.issn.1005-2518.2020.06.147

2020 , Vol. 28 >Issue 6: 779 - 785

DOI: https://doi.org/10.11872/j.issn.1005-2518.2020.06.147

Occurrence State and Ore-forming Regularity of Critical Metal Cobalt in the Changsha-Pingjiang Fault Zone，Northeastern Hunan Province

Zhilin WANG ,
Yang WU ,
Deru XU ,
Shaohao ZOU ,
Guojun DONG ,
Erke PENG ,
Juntao NING ,
Bo KANG

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^1.Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring，Ministry of Education，School of Geosciences and Info-Physics，Central South University，Changsha 410083，Hunan，China
^2.State Key Laboratory of Nuclear Resources and Environment，East China University of Technology，Nanchang 330013，Jiangxi，China
^3.Team 402，Hunan Geology and Mineral Resources Exploration and Development Bureau，Changsha 410004，Hunan，China

Received date: 2020-08-07

Revised date: 2020-09-14

Online published: 2021-01-29

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Abstract

Recently，the exploration of cobalt resources in the Jingchong-Beishan area，the east of Changsha-Pingjiang fault zone，northeastern Hunan Province，has made great advances.Some Co （-polymetallic） vein deposits including the medium-size Jingchong Cu-Co polymetallic deposit and Hengdong Co-Cu deposit，and Dayan Au-Co occurrence were discovered in this region.Based on the detailed field observation，this study identified the ore stages，and concluded the metallogenic characteristics of Changsha-Pingjiang cobalt ore belt as well as the ore-forming factors.The combined microscopic observation and in-situ analytical methods revealed that the metal Co was mainly incorporated in fine-grained pyrite and arsenopyrite as stoichiometric substitution，with subordinate occurrence as independent mineral cobaltite.The complicated texture and chemical compositions of Co-beating pyrite and arsenopyrite indicated that pyrite associated with arsenopyrite has the higher Co concentration （up to 13.48%），greater than that in arsenopyrite-exclusive assemblages.Therefore，the mineral assemblage of fine-grained pyrite and arsenopyrite can be used as the mineral fingerprint to trace the high-grade Co ores during the prospecting exploration.Subsequently，the preliminary mineral processing technology was proposed.

Key words： critical metal cobalt; pyrite; arsenopyrite; cobaltite; Changsha-Pingjiang fault zone; occurrence state; northeast of Hunan Province

Cite this article

Zhilin WANG , Yang WU , Deru XU , Shaohao ZOU , Guojun DONG , Erke PENG , Juntao NING , Bo KANG . Occurrence State and Ore-forming Regularity of Critical Metal Cobalt in the Changsha-Pingjiang Fault Zone，Northeastern Hunan Province[J]. Gold Science and Technology, 2020 , 28(6) : 779 -785 . DOI: 10.11872/j.issn.1005-2518.2020.06.147

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