中俄朝毗邻地区古吉黑造山带岩石及年代记录

新近查明的岩石及年代记录揭示,中俄朝邻域古吉黑造山带的基底是由约1000Ma的构造、岩浆、变质、成矿等耦合事件拼接的Rodinia超大陆的部分所组成.阿森特-兴凯期造山作用代表了本区对Rodinia的裂解（约始于900Ma）至冈瓦纳-劳伦超大陆拼合（545~525Ma）的积极响应,并属古亚洲洋的重要发展阶段.加里东构造旋回（440~425Ma）,早华力西构造旋回（350Ma）,晚华力西-早印支构造旋回（250~230Ma）,完成了古亚洲洋向古特提斯洋（海）的转换,实现了古欧亚大陆的形成,是对Pangea古陆聚合的积极响应.特别是早印支旋回,形成了陆陆拼贴-陆内俯冲-造山带崩塌连续过程的完整的岩石及年代记录.

PETROLOGY AND GEOCHRONOLOGY OF THE PALEO JILIN HEILONGJIANG OROGENIC BELT IN THE ADJECENT AREAS OF CHINA,RUSSIA AND KOREA

According to the recent petrologic a nd geochronologic records,the base ment of the paleo-Jilin-Heilongjia ng orogenic belt in the adjecent areas o f China,Russia and Korea is composed of the Rodinia supercontinent that was formed by the joint pcocesses of tectonics,magmatism,metamorphism and mineralization at ca.1000Ma.The As syn-tian-Xingkai orogeny,as an importa nt developing period of the paleo-As ian Ocean,represents the active response of the region to the splitting of Rodinia su percontinent (from ca.900Ma )until the matching of Gondwana-Laur entia super-continent (during 545to 525Ma ).The tectonic cycles of Caledonia(440-445Ma ),Late Varascan(ca.350Ma )and Early Indosinia(250-230Ma )completed the transformation from p aleo-Asian Ocean to paleo-Tethys,a nd formed the paleo-Eurasian continent,which re sponded to the convergence of the Pan gea.Especially in Early Indosinia c ycle,a completive petrologic and chronolo gic record on the continuous process ofcontinent-continent convergence -intra-continental underthrust -orogenic belt collapsewas formed.