Conglomerates on the Base Linsishan Formation of the Middle Early Cretaceous in Jiaolai Basin of Eastern Shandong, and Implications for Basin Evolution
doi: 10.14027/j.cnki.cjxb.2016.01.002
- Received Date: 2015-01-12
- Rev Recd Date: 2015-04-10
- Publish Date: 2016-02-10
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Key words:
- Jiaolai Basin /
- Cretaceous /
- Linsishan Formation /
- Conglmerate /
- sedimentary characteristics /
- basin evolution
Abstract: The Linsishan Formation, belonging to the bottom of the middl Early Cretaceous Laiyang Group in Jiaolai basin,Eastern Shandong, consists dominantly of a variety of conglomerates.Based on the petrological compositions, grain sizess and orientation of gravels within conglomerates at least 18 observation localities and a combination of detrital zircon dates of sandstones overlying the Linsishan Formation, this research reports a comprehensive results of the sedimentary facies, provenances,paleocurrents and implications of basin evolution.This study indicates that the Linsishan Formation mainly comprises of alluvial fan conglomerates with a variation of sedimentary microfacies in basin scale.The synsedimentary Jiaolai basin in term of paleogeography was constituted by three individual basins,i.e.,the Laiyang, Haiyang-Jimo and Zhucheng-Wulian basins, separated by the six paleo-uplifts.Provenance of the Laiyang basin are derived from Jiaobei uplift and the northern Sulu Orogenic Belt; source of the Haiyang-Jimu basin provided by northern Sulu Orogenic Belt, Jimo-Mouping uplift and Jiaonan uplift; Provenance of the Zhucheng-Wulian basin are derived from Jiaonan uplift and Mashan-Lijiadang low uplift. Finally,initiation of conglomerates of the Linsishan Formation in Eastern Shandong is a sign of formation of the synsedimentary Jiaolai basin and further,implies a large-scale collapse of the Sulu Orogenic Belt resulted from vast extensional crustal detachment and lithosphere thinning in East China because of destruction of North China Craton.
Citation: | ZHANG Peng, KUANG HongWei, LIU YongQing, PENG Nan, XU Huan, WANG MingWei, AN Wei, WANG NengSheng. Conglomerates on the Base Linsishan Formation of the Middle Early Cretaceous in Jiaolai Basin of Eastern Shandong, and Implications for Basin Evolution[J]. Acta Sedimentologica Sinica, 2016, 34(1): 15-32. doi: 10.14027/j.cnki.cjxb.2016.01.002 |