Lithospheric dripping in a soft collision zone:Insights from late Paleozoic magmatism suites of the eastern Central Asian Orogenic Belt
作者机构：College of Geo-exploration Science and TechnologyJilin UniversityChangchun 130026China College of Earth SciencesJilin UniversityChangchun 130061China School of Earth Science and ResourcesChina University of GeosciencesBeijingBeijing 100083China Department of Earth SciencesUniversity of AdelaideAdelaideSouth Australia 5005Australia Exploration and Development Research InstituteDaqing Oilfield Limited CompanyDaqing 163712China Tianjin CenterChina Geological SurveyTianjin 300170China
出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)
年 卷 期：2023年第14卷第1期
页 面：101-117页
核心收录：
学科分类：070902[理学-地球化学] 070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学]
基 金：the National Natural Science Foundation of China(Grants Nos.41888101 42102046 and 92062216)
主 题：Soft collision Lithospheric dripping Double-sided subduction Central Asian Orogenic Belt Late Paleozoic
摘 要：The closure of Paleo-Asian Ocean is considered to have occurred along the Solonker Suture in the southernmost segment of the Central Asian Orogenic Belt(CAOB),the largest Phanerozoic accretionary orogen on the *** suture branches to the east to form the northern Hegenshan-Heihe Suture and the southern Solonker-Changchun *** Hegenshan-Heihe Suture is an ideal natural laboratory for studying the post-collisional geodynamic processes operating in a soft collision zone driven by divergent double-sided *** we report results from an integrated study of the petrology,geochronology,geochemistry,and Sr-Nd-Hf isotopic compositions of the Early Carboniferous-Early Permian mag-matic suite in the Hailar Basin of the Xing an-Erguna *** Early Carboniferous igneous rocks are represented by 356-349 Ma andesitic tuffs,exhibiting typical subduction-related features,such as enrichment in large-ion lithophile elements and depletion in high-field-strength *** features,together with the relatively depleted Sr-Nd-Hf isotopic compositions,constant Nb/Y values,but highly variable Rb/Y and Ba values indicate that these rocks were generated by partial melting of a depleted mantle wedge metasomatized by slab-derived *** Late Carboniferous-Early Permian magmatic suite(317-295 Ma)is characterized by high Sr contents(313-1080 ppm)and low Y contents(5-13 ppm),and these can be subdivided into calc-alkaline adakitic rocks and high-K calc-alkaline adakitic *** calc-alkaline adakitic rocks have higher values of Sr/Y,(Sm/Yb)_(source normalized),and Mg#,and lower values of Y,_(Ybsource normalized),and K_(2)O/Na_(2)O than the high-K calc-alkaline adakitic rocks,which suggests that the former was generated by partial melting of foundered lower continental crust and the latter by partial melting of normal lower continental *** on our new data,in conjunction with those in previous studies,we conclude that the tectonic evolution of the Hegenshan-H
维普期刊数据库