nlwxpearo
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 Posted: Mon 21:31, 14 Feb 2011 Post subject: Liaoning-Jilin region of the continental crust of |
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Liaoning-Jilin region of the continental crust of early Precambrian geochronology
6,[link widoczny dla zalogowanych],7 O (4): 335 ~ 341 [12] Liu Zhihong. Following the San Jiang,[link widoczny dla zalogowanych], Yang summarized liters. Banshigou regional metamorphism in southern Jilin Province on the shell rock Sm-Nd isotopic age and geological significance Wei [J】 rock mines Jun Journal. 1999,18 (1): 4649GeochronologyofPrecambrianContinentCrustinLiaoningProvinceandJilinProvinceLIJuian, SHENBao-fang (TianfinInstituteofGeologyandMineralResources, 7 sed0fgranite-greenstonebettsandhighgrademetamorphicareaAccordingtoge0l0gical,[link widoczny dla zalogowanych], geochemicalcharactersandmineralizations, thegreenstonebeltscanbedividedintoItypeandRtype. ThePalam-tectonicsettingsforgreenstonebehsarethemobilezonesincontinentalmarginsimilartothatofmodernislandarcandriftinconfinentaImar-ginorBack-arcbasin. respectively. Granitic ∞ as associatedwithgmenstonebeltscanbedividedintothreeassociatiohs: gneissicgraniticcomplex, graniticdiaprisandkaligranite. HighgrademetamorphJcareatakingshapeo {ovalupliftistheprincipalpartofPreearnbriancrust. whichisundergoneregionalmetamorphi ~ aofhamphibolitetogranulltefaciesandconstitutesthebase-mEaatofgranlte-greenstonebelt. Isotoplc ~ esOfsinglezirconU. Pb. . Ax /,[link widoczny dla zalogowanych], Sm-NdandRhSrisochronsuggestthegreenstonebeItsdevelopedin26O5 ~ 2844Ma. Theagesofthreetypeofgraniticrocksassociatedwithgraenstonebehsam (2555 ± 35) Ma, (2515 ± 4) Maand2505Ma,[link widoczny dla zalogowanych], respectively. Thetimeofrotatingsupercrustrocksandgranitesinhighgrade deleted are3018Maand2971IVla. ThelateeraofcratonizationofthePre. cambriancontinentcrustintheaeraisin [ateNcoareheen. Keywords: gecchmnology; Precambriancontinentcrust; granite-greenstone; Li ~ oningProvinceandJilinProvince; China
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