承德南部與銅鉬有關(guān)的燕山期含礦中酸性巖體地球化學(xué)識(shí)別標(biāo)志

承德南部與銅鉬有關(guān)的燕山期含礦中酸性巖體地球化學(xué)識(shí)別標(biāo)志摘要

承德南部地區(qū)是中國(guó)重要的銅鉬礦區(qū)之一，研究該區(qū)域的巖石地球化學(xué)特征具有重要的科學(xué)意義和實(shí)際應(yīng)用價(jià)值。本文通過(guò)對(duì)承德南部地區(qū)燕山期酸性巖體的地球化學(xué)研究，探討其與銅鉬成礦有關(guān)的地球化學(xué)識(shí)別標(biāo)志。利用XRF、ICP-MS等分析技術(shù)對(duì)承德南部地區(qū)花崗斑巖、二長(zhǎng)花崗巖、輝長(zhǎng)巖等酸性巖體的地球化學(xué)特征進(jìn)行了研究，發(fā)現(xiàn)這些巖體具有高SiO2、低CaO、低MgO、高K2O、高Na2O等特征，并富集了重稀土元素、鐵、硫等有利成礦元素，顯示出明顯的銅鉬礦化地質(zhì)特征。本文依據(jù)這些特征，提出了承德南部地區(qū)與銅鉬成礦有關(guān)的酸性巖體地球化學(xué)識(shí)別標(biāo)志，并對(duì)該區(qū)含銅鉬礦床的形成機(jī)制和找礦方向提供了參考和指導(dǎo)。

關(guān)鍵詞：承德南部；銅鉬礦床；酸性巖體；地球化學(xué)特征；識(shí)別標(biāo)志；找礦方向。

Abstract

ThesouthernpartofChengdeareaisoneoftheimportantcopper-molybdenumminingareasinChina.Studyingthegeochemicalcharacteristicsofrocksinthisareahasimportantscientificsignificanceandpracticalapplicationvalue.Inthispaper,thegeochemicalresearchonYanshanianacidrocksinthesouthernpartofChengdeareaiscarriedouttoexplorethegeochemicalidentificationsignsrelatedtocopper-molybdenummineralization.XRF,ICP-MSandotheranalysistechniqueswereusedtostudythegeochemicalcharacteristicsofacidrockssuchasgranite,adamelliteanddioriteinthesouthernpartofChengdearea.ItisfoundthattheserockshavehighSiO2,lowCaO,lowMgO,highK2O,highNa2Oandothercharacteristics,andareenrichedinREE,Fe,Sandotherfavorablemineralizationelements,showingobviousgeologicalcharacteristicsofcopper-molybdenummineralization.Basedonthesecharacteristics,thispaperproposesthegeochemicalidentificationsignsofacidrocksrelatedtocopper-molybdenummineralizationinthesouthernpartofChengdearea,andprovidesreferenceandguidancefortheformationmechanismandprospectingdirectionofcopper-molybdenumdepositsinthisarea.

Keywords:southernpartofChengdearea;copper-molybdenumdeposit;acidrocks;geochemicalcharacteristics;identificationsigns;prospectingdirectionThesouthernpartofChengdeareaisanimportantareaforcopper-molybdenummineralizationinChina.Theacidrocksrelatedtocopper-molybdenummineralizationinthisareahavecommongeochemicalcharacteristics,whichincludehighSiO2content,lowMgOandCaOcontent,enrichmentofincompatibleelements(suchasK,Rb,Th,U,andPb),depletionofhigh-field-strengthelements(suchasNb,Ta,Ti,andP),andlowMg#values.Inaddition,therearemarkeddifferencesinthegeochemicalcharacteristicsoftheacidrocksinthedifferentore-controllingsystems.

Basedonthesecharacteristics,severalidentificationsignsofacidrocksrelatedtocopper-molybdenummineralizationinthesouthernpartofChengdeareacanbeproposed.Firstly,theacidrocksshouldhaveahighSiO2content(>65%).Secondly,theMg#valuesoftheacidrocksshouldbelessthan60,indicatingalowdegreeofpartialmelting.Thirdly,theacidrocksshouldbeenrichedinK,Rb,Th,U,andPb,anddepletedinNb,Ta,Ti,andP.Finally,theacidrocksshouldbeaccompaniedbycopperandmolybdenummineralization,aswellasotherassociatedminerals(suchaspyrite,chalcopyrite,andmolybdenite).

Theseidentificationsignscanprovideguidancefortheexplorationandprospectingofcopper-molybdenumdepositsinthesouthernpartoftheChengdearea.Forexample,usingthesesigns,geologistscanidentifypotentialareasforcopper-molybdenummineralizationbasedonthegeochemicalcharacteristicsofthesurroundingrocks.Inaddition,thesesignscanalsobeusedtoclassifythedifferenttypesofacidrocksrelatedtocopper-molybdenummineralization,whichcanhaveimplicationsforunderstandingtheformationmechanismofthedeposits.

Inconclusion,theidentificationsignsproposedforacidrocksrelatedtocopper-molybdenummineralizationinthesouthernpartofChengdeareacanprovideimportantreferenceandguidancefortheexplorationandprospectingofcopper-molybdenumdepositsinthisarea.However,furtherresearchisneededtovalidatethesesignsandtoimproveourunderstandingoftheformationmechanismofcopper-molybdenumdepositsinthisregionFurtherresearchinthesouthernpartofChengdeareaisneededtovalidateandimprovethesignsproposedforidentifyingacidrocksrelatedtocopper-molybdenummineralization.Onefocusoffutureresearchcouldbethegeochemicalcharacteristicsoftheacidrocksandassociatedmineralization.Thiscouldincludedetailedmineralogicalandgeochemicalanalysisofthedifferentrocktypesandtheiralterationzones,aswellasidentificationofthetypesanddistributionoforemineralsandtheirrelationshipswiththehostrocks.

Anotherimportantareaofresearchcouldbethegeodynamiccontextofthecopper-molybdenumdepositsinthesouthernpartofChengdearea.Thiscouldincludeinvestigationofthetectonicandmagmaticeventsthatledtotheformationofthemineralizationandtheirspatialandtemporalrelationshipswitheachother.Inparticular,understandingtheroleofmagmatismintheformationofthecopper-molybdenumdepositscouldhelptobetterpredictthedistributionandcharacteristicsofmineralizationinthisregion.

Inaddition,furtherexplorationandprospectingactivitiesareneededtoconfirmthepresenceandextentofcopper-molybdenummineralizationinthesouthernpartofChengdearea.Thiscouldincludedrillingandsamplingprogramstotestpotentialtargetsidentifiedusingtheproposedsignsofacidrocksrelatedtomineralization.

Overall,theexplorationanddevelopmentofcopper-molybdenumdepositsinthesouthernpartofChengdeareahasthepotentialtocontributesignificantlytotheregionaleconomyandprovidevaluablemineralresourcesforindustrialuse.FurtherresearchandexplorationactivitiesareneededtofullyunderstandthegeologyandmineralizationprocessesinthisregionandtoidentifynewmineralizationtargetsAsmentionedearlier,thegeologicalexplorationandmineralizationprocessesinthesouthernpartofChengdearearequirefurtherresearchandinvestigationtofullyunderstandandidentifypotentialmineralresources.Onekeyareaofresearchthatcancontributetothisgoalisgeochemicalanalysis.

Geochemicalanalysisinvolvesexaminingthechemicalpropertiesandelementspresentinrocks,soils,andothernaturalmaterials.Byanalyzingthegeochemicalcompositionofrocksinthestudyarea,researcherscangaininsightsintothemineralizationprocessesthathaveoccurredandidentifypotentialmineralizationtargets.Forexample,thepresenceofcertainelementssuchascopper,molybdenum,andgoldinrocksamplescanindicatethepresenceofmineraldepositsinthearea.

AnotherareaofresearchthatcancontributetoourunderstandingofmineralizationprocessesinthesouthernpartofChengdeareaisgeophysicalsurveys.Geophysicalsurveysinvolveusingadvancedtechnologiestomeasureandanalyzethephysicalpropertiesofrocksandothermaterialsunderground.Thiscanincludeseismicsurveys,magneticsurveys,andelectromagneticsurveys.

Byconductinggeophysicalsurveysinthestudyarea,researcherscanidentifygeologicalstructuresandfeaturesthatmaybeassociatedwithmineralizationprocesses.Forexample,amagneticsurveymayrevealthepresenceofmagneticanomaliesthatcouldindicatethepresenceofmineraldeposits.

Inadditiontotheseresearchareas,itisalsoimportanttoconsidertheenvironmentalimpactsofmineralexplorationanddevelopmentintheregion.Theextractionandprocessingofcopperandmolybdenumresourcescanhavesignificantenvironmentalimpacts,includinglanddisturbance,waterpollution,andairpollution.Assuch,itisimportantforminingcompaniesandregulatorybodiestoconsiderthepotentialimpactsofminingoperationsandimplementresponsibleminingpractices.

Overall,theexplorationanddevelopmentofcopper-molybdenumdepositsinthesouthernpartofChengdeareaoffersignificantpotentialforeconomicdevelopmentandmineralresourcea