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Detrital zircon geochronology and stratigraphy of the Proterozoic strata in the Olongbuluke terrane of Northwest China: Implications for the Great Unconformity

文献类型：期刊论文

作者Sun, Yunpeng1,2,3; Ouyang, Qing2,3; Pang, Ke1,2,3; Wu, Chengxi1,2,3; Chen, Zhe1,2,3; Yuan, Xunlai1,2,3; Zhou, Chuanming1,2,3; Chen, Zhe（陈哲）; Pang, Ke（庞科）; Yuan, Xunlai（袁训来）
刊名PRECAMBRIAN RESEARCH
出版日期2022-07-15
卷号376页码:18
关键词Chronostratigraphy Great Unconformity Quanji Group Olongbuluke terrane North China craton
ISSN号0301-9268
DOI10.1016/j.precamres.2022.106684
通讯作者Zhou, Chuanming(cmzhou@nigpas.ac.cn)
英文摘要The Great Unconformity that separates the early Cambrian sandstones from the Proterozoic metamorphosed sedimentary rocks has been recognized in many blocks on Earth. However, whether it represents a globally synchronous event or a composite of a series of diachronous events, and its formation mechanism remain largely unknown. In this study, we carry out detrital zircon U-Pb analyses for seven samples collected from the Paleopmterozoic Quanji Group and the overlying Neoproterozoic strata in the Olongbuluke terrane (OLT) of Northwest China. The results show that apart from age populations of similar to 1.8-2.0 Ga and similar to 2.2-2.5 Ga for all samples, additional similar to 1.55-1.65 Ga age population occurs in sample from the Zhoujieshan Formation, and more scattered age populations ranging from similar to 0.75 to similar to 1.7 Ga are present in samples from the Heitupo and Hongtiegou formations. The similar to 1.8-2.0 Ga and similar to 2.2-2.5 Ga zircons correlate well with the magmatic and metamorphic events in the OLT basement, indicating their local provenances, while other zircons were possibly derived from the North China craton (NCC) or other adjacent blocks. Combined with published paleontological, stratigraphic, and geochronological data, the present study supports previous inference that the OLT had a close paleogeographic affinity to the NCC during late Paleoproterozoic to Neopmterozoic. New zircon U-Pb ages indicate that the Heitupo Formation was deposited later than similar to 750 Ma, and the underlying Hongzaoshan Formation was deposited at similar to 1.66 Ga, implying a huge break between them. Whereas the duration of the sedimentary break between the Heitupo Formation and the overlying Hongtiegou Formation is uncertain, biostratigraphic data suggest that a break of similar to 30 Myr may exist between the late Ediacaran Zhoujieshan Formation and the overlying early Cambrian Xiaogaolu Group. The occurrences of these multiple unconformities in OLT are comparable to those in NCC, indicating that the Great Unconformity is represented by a series of lengthy denudations during the Proterozoic-early Cambrian in both the OLT and NCC, which may result from multiple tectonic activities in these two blocks.
WOS关键词QAIDAM UHPM BELT ; NORTHERN TIBETAN PLATEAU ; U-PB AGES ; QUANJI MASSIF ; CRATON IMPLICATIONS ; TARIM CRATON ; MAFIC DYKES ; COLUMBIA SUPERCONTINENT ; PRECAMBRIAN EVOLUTION ; NORTHEASTERN MARGIN
资助项目Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0706] ; Chinese Academy of Sciences[XDB26000000] ; Chinese Academy of Sciences[XDB18000000] ; Chinese Academy of Sciences[QYZDJ-SSW-DQC009] ; National Natural Science Foundation of China[41921002] ; Youth Innovation Promotion Association of the CAS[2021307]
WOS研究方向Geology
语种英语
WOS记录号WOS:000832717000001
出版者ELSEVIER
资助机构Second Tibetan Plateau Scientific Expedition and Research ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the CAS
源URL[http://ir.nigpas.ac.cn/handle/332004/41114]  
专题中国科学院南京地质古生物研究所
通讯作者Zhou, Chuanming; Zhou, Chuanming（周传明）
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Palaeoenvironm, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Yunpeng,Ouyang, Qing,Pang, Ke,et al. Detrital zircon geochronology and stratigraphy of the Proterozoic strata in the Olongbuluke terrane of Northwest China: Implications for the Great Unconformity[J]. PRECAMBRIAN RESEARCH,2022,376:18.
APA Sun, Yunpeng.,Ouyang, Qing.,Pang, Ke.,Wu, Chengxi.,Chen, Zhe.,...&Zhou, Chuanming.(2022).Detrital zircon geochronology and stratigraphy of the Proterozoic strata in the Olongbuluke terrane of Northwest China: Implications for the Great Unconformity.PRECAMBRIAN RESEARCH,376,18.
MLA Sun, Yunpeng,et al."Detrital zircon geochronology and stratigraphy of the Proterozoic strata in the Olongbuluke terrane of Northwest China: Implications for the Great Unconformity".PRECAMBRIAN RESEARCH 376(2022):18.

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来源：南京地质古生物研究所

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