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  • 简介:Thepaperdescribestheproposedmodelsofdiamondformationbothinmeteoritesandinkimberliteandlamproitebodies.metamorphiccomplexesandexplosive-ringstructures('astroblemes'),Thediamonddistributioninmeteorites(chondrites,ironmeteoritesandureilites)isrestrictedtotaente-kamasitephase.Thediamondgenerationhereistiedupwiththefirststageofevolutionoftheplanets,Thisstageischaracterizedbyhighpressureofhydrogen.leadingtotheformationoftheplanetenvelope,Thesecondstageofplanetevolutionbeganwiththeprogressiveimopoverishmentoftheiratmospheresinhydrogenduetoitspredominantemissionintothespaceandtoprogressivedevelopmentofoxidativeconditions.Themodelappearstohaveprovedtherelictnatureofdiamondmineraolizationinmeteorites.Diamondandotherhigh-pressureminerals(its'satellites')werecrystallizedwithoutanyexceptionintheearlyintratelluricstagesofperidotiteandeclogite-pyroxenitemagmaevolutionjustbeforethemagmaintrusionintothehigherlevelsofthemantleandcrustwherediamondisnotthermodynamicallystable,Theultramaficintrusivebodies(bearingrichrelictdiamonds)inthedaseofaplatformpaaeartobethesubstratafortheformationofkimberlite-lamproitemagmachambersasaresultofmagmaticreplacement.Themodelexplainsthepolyfacialnatureofdiamondiferouseclotgites,pyroxenitesandperidotitesanddiscussestheprocessofinheritanceoftheirdiamondmineralizationbykimberlitesandlamproites.Dimondoproductivityofmetamorthiccomplexesisoriginatedbytheinheritanceoftheirdiamondsfromtheabove-mentionedprimarydiamondiferousrocks.Largediamondiferousexplosive-ringstructureswereformedbyhigh-energyendogenicexplosionoffluidwhichcamefromtheEarth'score.Thishighenergydiffersendogenicimpactogenesisfromexplosivevolcanism.Itproceedsatveryhightemperaturetocreatediaplecticgalsses(monomineralpseudomorphs)-theproductofisochoricmelting,atthepressurehighenoughforth

  • 标签: 金刚石矿床 成矿作用 成因类型 高压作用 榴辉岩