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《JOURNAL OF CHANGCHUN UNIVERSITY OF SCIENCE AND TECHNOLOGY》 1999-04
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EVOLUTION OF HERCYNIAN OROGENIC BELT IN DAXING'ANLING MT: EVIDENCE FROM GRANITIC ROCKS

Xu Wenliang,Sun Deyou,Yin Xiuying (Changchun University of Science and Technology,Changchun 130026)  
The data of geology,petrology and geochemistry of Hercynian granitic rocks and researches on Late Paleaozoic sedimentaryvolcanic formations indicate that Early Hercynian granodioriteplagiogranite associations(375~350 Ma)in Wunuer and Duobaoshan are formed in the extension environment similar to backarc basin and in volcanic arc environment,respectively,that Middle Hercynian granodioritemonzogranite association(340~310 Ma)in Duobaoshan is formed in cocollision and postcollision uplift environments;and that Late Hercynian monzogranitesynogranite associations(290~240 Ma)in Daxing'anling Mt.is formed in late orogenic and postorogenic stretching environments.The Hercynian magmatism could have gone on about 140 Ma.The interval between different episode magmatisms is about 10~20 Ma.The Hercynian granitic rocks recored the evolution of Hercynian orogenic belt in Daxinganling Mt.
【Fund】: 地矿部“八五”重大项目;中国满洲里-绥芬河地学断面(GGT)多学科综合研究项目
【CateGory Index】: P541
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