地质外文文献翻译中英文对照

精品资料长安大学资源学院英语文献翻译学院地球科学与资源学院专业资源勘查工程学生姓名张桃学号201127020308指导教师张亚敏2015年6月18日精品资料Title:OrthomagmaticoredepositsOne.OrthomagmaticoredepositsThemagmacontainsacertainnumberofmetalandvolatilecomponentsofthesilicatemelt.Allkindsofmagmaaftercrystallizationanddifferentiation,maketheformingmaterialsdispersedinthemagmagatheredandformeddeposits.Andthisdepositsiscalledmagmaticdeposits.Magmaticdepositsformedinthemagmaticstage,thesourceofthematerialofthedepositisthemainore-bearingmagma.Magmaticdepositsistheproductofthemagmabycrystallizationanddifferentiation,andgenerallyhavethefollowingproperties:1、Depositshavethemainlyrelationshipwiththemaficandultramaficrocks.Andasmallnumberofmagmaticdepositswithalkalinerocksormagmaticcarbonatite-related.Mineralizationanddiagenesisoftenbeginatthesametime.Andthisistypicalofsyngeneticoredeposits.Fewmineralizationofthemagmaticdepositsmaybecontinuedtoalatertime,butgenerallydoesnotexceedatotalperiodofmagmaticactivity.2、Themagmaticdepositsorebodymajoritypresentstratiform,lenticularandpodiformandsoon.Andtheyproduced精品资料inthemagmabody,andthewallrockofcontainingoreisthemotherrock.Fewcases,orebodypresentingveinandstockworkenterthewallrockwhichoutsideofthemotherrockBetweentheorebodyandthewallrockgenerallyisgradualchangeorrapidgradualchangerelationship.Onlypenetrationmagmaticdepositshavetheclearboundarieswiththewallrock.3、Excepttherareandrareearthelementsdepositsofthemagmaticcarbonatiteduetospecialcauseshavesomealterationaboutthewallrock,thevastmajorityofmagmaticdepositssurroundingrockdoesnothaveasignificantalterationphenomenon.4、Theoreandthewallrockbasicallyhavethesamemineralcomposition,whentheusefulmineralsoftherockbodyaggregateandreachacertainsize,theybecometheorebody.5、Theoreofmagmaticdepositsoftenhave,disseminated,thebanded,eyeporphyritic,densemassive,brecciatedandsoon,orestructure.Theoresstructurecanbebroadlydividedintothefollowingcategories:I.Structuresub-thedifferentmagmaticcondensatecrystallineorstackinginteractions;II.ReflectthestructureoftheimmisciblefluidcrystallizationprocessIII.Reflectthechangesinthestructureofthephysicalandchemical精品资料conditions.IV.Epigeneticstructure.6、Themagmaticdepositsformingtemperatureishigh,generallybetween1200to700°C.Themineralizationdepthchanges,generallyformedinthegroundafewkilometerstotensofkilometers.Tow.TheformationconditionsofmagmaticdepositsMagmadepositsaremainlyderivedfromthemagma,itisthecombinedeffectsoftheproductbyavarietyofgeologicalfactors,whichplayingaleadingroleisthegeochemistryofore-formingelementstraits,themagmaticrockconditions,tectonicconditionsandphysicalandchemicalconditionsandsoon.1、ControltheconditionsofmagmaticrocksformedbymagmaticdepositsMagmaisthemainproviderofthemetallogenicmaterialofthemagmaticdepositsandthemediumofcontainingmineralmedium.Therefore,howmuchofthecontentofusefulcomponentsofmagmaisthepossibilityoftheformationofmagmaticdeposits.I.MagmaticrocksmetallogenicspecializationMetallogenicspecializationofmagmaticrocksinthegenesisofmagmaticrockswithendogenousdepositsshowed精品资料regularcontact,andspecifictypesofmagmaticrocksareoftenproducedspecifictypesofdeposits.a)WithmaficandultramaficintrusiverocksrelateddepositsMaficandultramaficrockisthecomplexigneouscomplexformedbythecombinationofavarietyofrocktypes,rocktypesfromasinglerockcomposedofrockmassisrelativelyrare.Thesizeoftherockmassrangingmostlysmall,androckstrains,rockcover,rock,bedrockisthemostcommonformoftherockmass.Withfaciesandthedifferentcombinations,themaficandultramaficrockscanbedividedintothreetypes.b)Mineraldepositsassociatedwithsyenite,nephelinesyeniteandcarbonateigneouscomplexRelatingtomagmaticdepositsoftheserocksaremostlyproducedwiththeformofrockstrain,thedifferentcomponentsofrockmassfacieszoneoftenhasringdistribution.II.TheroleofthevolatilecomponentsinthemagmaThemagmavolatilecomponentshavethelowmeltingpoint,highlyvolatileandtheycandelaythecondensationrateofthemagma,makethemagmahavemorefullydifferentiation.III.Magmaticassimilationhaveaninfluenceonthe精品资料mineralizationofthemagmaDepositsIV.Beyondoneperiodofmagmaintrusiononcontrolofthemineralization2、TectonicconditionsthatcontroltheformationofmagmaticdepositsTectonicshaveamajorimpactonthetypeofmagmaticdeposits,distribution,themostmagmaticdepositsassociatedwithmaficandultramaficigneousrocksontheCausesandspace.Maficandultramaficmagmaformedbypartialmeltingofmantlematerial,sothedeepfaultcutsthroughthecrusttoreachtheuppermantlehaveastrictcontroleffectonthemafic,ultramaficrocksandmagmaticdepositswhichhavesomerelationshipwiththem.Three.Magmaticdepositsformationanditscharacteristics1、Theprocessofthemagma’susefulcomponentsanalysis,aggregationandpositioningiscalledmagmaticmineralization.Becausethemagmaticdepositsmafic-ultramaficpetrogenesisprocessisverycomplex,themineralizationalsoisvaried.Accordingtothewayandfeatureofthemineralization,magmaticmineralizationcanbedividedintofourcategories,thecrystallizationdifferentiationmineralization,meltingawayfromthemineralizationthemagma精品资料eruptionmineralizationandmagmaeruptionmineralization.When