Mineralization regularity, scientific issues, prospecting technology and research prospect of Co.Ni deposits in China.

作者：Su BenXun^*; Qin KeZhang; Jiang ShaoYong; Cao MingJian; Zhang ZhaoChong; Zhang HongLuo; Xue GuoQiang; Zhou TaoFa; Mo JiangPing

来源：ACTA PETROLOGICA SINICA, 2023, 39(4): 968-980.

DOI：10.18654/1000.0569/2023.04.02

• Co.Ni deposit
• Composite deposit
• Coexistence and separation of Co and Ni
• Prospecting technology

TherearefourmajortypesofCo.Nideposits,namely,magmatic,lateritic,(meta.)sedimentaryrock.hosted,and hydrothermaltypes.Inthisstudy,weproposedthatmanyoftheseCo.Nidepositsarecompositedepositsthatarecharacterizedwith commonfeaturesofmultipledeposittypesormultiple.metalelementassemblages,andthesedepositsareimportantbridgesthatcanlink differentdeposittypes,metallogenictheory,andmodelsfororeformationandtheirexploration. Withaspectsofmetalelement occurrences,Ni.dominateddepositsmostlyaccompanyCoenrichmentuptoeconomicgrade,whereasCo.dominateddepositsmaynotbe richinNi.ElementalgeochemistryrevealsthatCoandNicommonlycoexistwithinmagmaticsystem,whiletheycouldseparatelyoccur duringhydrothermal,weatheringandsedimentaryprocesses.Hence,thekeyscientificissuerelevanttoCo.Nimineralizationisthe mechanism ofcoexistenceandseparationofCoandNiintheabove.mentionedprocesses. ToconstructacomprehensiveCo.Ni metallogenictheoryrequiresexperimentalpetrology,numericalmodeling,characterizationsofoccurrenceandenrichmentofCoandNi inadditiontostudiesoftypicalandcompositedeposits.Moreover,morestudiesareneededincludingcouplingofCo.Nimineralization andimportantglobalgeologicaleventsingeologictimeframework,petrogenesisandtectonicsettingofvariousmafic.ultramaficmassifs, andeffectsofhydrothermalmodificationsonCosuper.enrichment.MostCo.Niorebodiesandtheirhostrocksarehighlyvariablein occurrenceandhavesimilargeophysicalpropertiesinmanycaseswithnumerousCo.andNi.bearingphases.Thesecallonmultiple prospectingtechniquesformineralexplorationandevaluation,including:(1)geophysicaltechnologyforidentificationandextractionof ore.relatedsignalsundertheinterferenceofthecarbonaceouslayer;(2)highlysensitiveidentificationtechnologyofsmallintrusions andsteeply.inclinedorebodies;(3)matchingcorrelationofmultipleinformationandore.bearingevaluationtechnology.Considering thecharacteristicsofCo.NidepositsinChina,prospectingtechniquesformagmatictypesshouldbefirstlydeveloped,while(meta.)sedimentaryrock.hostedandhydrothermalCo.Nidepositsmayemployexplorationtechnologyofsyn.geneticdepositsormainmineral deposits

• 单位
  中国科学院研究生院