{"title":"Mesozoic-Cenozoic tectonic-paleogeographic evolution of Bayingobi basin: response to subduction and collision of the Mongol-Okhotsk Ocean plate","authors":"Liu Bo, Peng Hao, Peng Li, Haiyun Zhang, Xujie Guo, Pengfei Zhang, Yanwei Qin","doi":"10.1144/jgs2023-109","DOIUrl":null,"url":null,"abstract":"\n The structures, sedimentary fill, and magmatic rocks of sedimentary basins are the products of regional tectonic evolution and are crucial to studying the basin's tectonic-paleogeographic environment and regional tectonic evolution. The present study discussed the zircon U-Pb dating of volcanic rocks samples, in-situ Hf isotope, and whole rock geochemistry analysis of the Bayingobi basin, the paleogeographic, sedimentary filling, and tectonic background of the Bayinggobi basin through the outcrop and core description of Meso-Cenozoic strata, stratigraphic correlation and lithofacies analysis. The U-Pb age of the volcanic rocks is 132–102 Ma, and the in-situ Hf isotopic values range from -20.99 to +29.48. The\n 87\n Sr/\n 86\n Sr and\n 143\n Nd/\n 144\n Nd isotopic ratios of the volcanic rocks are 0.707049–0.879761 and 0.511846–0.512540, respectively, and the Nd isotopic values range from -0.62 to -6.83. The volcanic rocks in the basin have the characteristics of congenital margin island arc volcanic rocks (CAA) with loss of Nb, Ta, and enrichment of Pb, originating mainly from dehydration melting of the plate subduction. The lower Cretaceous Bayingobi, Suhongtu, and Yingen Formations developed specifically delta-lacustrine deposits. The lower and upper member of the Bayinggobi Formation was deposited at Berriasian to Valanginian and Valanginian to late Aptian, respectively. The Suhongtu Formation was deposited during the late Aptian to early Albian and controlled by the strike of Engeer Us fault. The Yingen Formation was deposited in the late faulted depression stage at late Albian. Because of the subduction of the Mongol-Okhotsk Ocean plate in the Early Cretaceous, several depressions (sags) were formed in the Bayingobi basin, accompanied by the eruption of continental plate margin island arc magmas. With the closure of the Mongol-Okhotsk Ocean in the late early Cretaceous, the basin uplifted as a whole and the Upper Cretaceous Ulansuhai Formation was deposited.\n \n \n Supplementary material:\n https://doi.org/10.6084/m9.figshare.c.7105807\n","PeriodicalId":2,"journal":{"name":"ACS Applied Bio Materials","volume":"65 3","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Bio Materials","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1144/jgs2023-109","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, BIOMATERIALS","Score":null,"Total":0}
引用次数: 0
Abstract
The structures, sedimentary fill, and magmatic rocks of sedimentary basins are the products of regional tectonic evolution and are crucial to studying the basin's tectonic-paleogeographic environment and regional tectonic evolution. The present study discussed the zircon U-Pb dating of volcanic rocks samples, in-situ Hf isotope, and whole rock geochemistry analysis of the Bayingobi basin, the paleogeographic, sedimentary filling, and tectonic background of the Bayinggobi basin through the outcrop and core description of Meso-Cenozoic strata, stratigraphic correlation and lithofacies analysis. The U-Pb age of the volcanic rocks is 132–102 Ma, and the in-situ Hf isotopic values range from -20.99 to +29.48. The
87
Sr/
86
Sr and
143
Nd/
144
Nd isotopic ratios of the volcanic rocks are 0.707049–0.879761 and 0.511846–0.512540, respectively, and the Nd isotopic values range from -0.62 to -6.83. The volcanic rocks in the basin have the characteristics of congenital margin island arc volcanic rocks (CAA) with loss of Nb, Ta, and enrichment of Pb, originating mainly from dehydration melting of the plate subduction. The lower Cretaceous Bayingobi, Suhongtu, and Yingen Formations developed specifically delta-lacustrine deposits. The lower and upper member of the Bayinggobi Formation was deposited at Berriasian to Valanginian and Valanginian to late Aptian, respectively. The Suhongtu Formation was deposited during the late Aptian to early Albian and controlled by the strike of Engeer Us fault. The Yingen Formation was deposited in the late faulted depression stage at late Albian. Because of the subduction of the Mongol-Okhotsk Ocean plate in the Early Cretaceous, several depressions (sags) were formed in the Bayingobi basin, accompanied by the eruption of continental plate margin island arc magmas. With the closure of the Mongol-Okhotsk Ocean in the late early Cretaceous, the basin uplifted as a whole and the Upper Cretaceous Ulansuhai Formation was deposited.
Supplementary material:
https://doi.org/10.6084/m9.figshare.c.7105807
期刊介绍:
ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications.
The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.