U-Pb ages of detrital zircons from deep-water Well LS33A at Lingnan Low Uplift of the Qiongdongnan Basin and their geological significances

doi:10.1088/1755-1315/100/1/012202

	U-Pb ages of detrital zircons from deep-water Well LS33A at Lingnan Low Uplift of the Qiongdongnan Basin and their geological significances
	Xiu, C.1,2; Sun, Z. P.3; Zhai, S. K.2; Liu, X. Y.3; Liu, X. F.2; Chen, K.3; IOP
	2017
卷号	100
DOI	10.1088/1755-1315/100/1/012202
英文摘要	U-Pb ages of detrital zircons from Well LS33A at Lingnan Low Uplift of the Qiongdongnan Basin (QDNB) are measured with LA-ICP-MS technique. Th/U ratios of detrital zircons mostly with oscillatory zoning are higher than 0.1, indicating a magmatic origin. Zircon U-Pb data of the Yacheng Formation yield an age range from 95.8 to 387.9 Ma, with two major clusters of 95-106 Ma and 214-237 Ma, representing Yanshanian and Indosinian, respectively. U-Pb age range of the Yinggehai-Ledong Formations varies widely from 87 to 2 490 Ma, exhibiting four remarkable age peaks of 88 Ma, 146 Ma, 208 Ma and 386 Ma on age spectrum. The variation in zircon age assemblage reveals that in provenance. Based on synthesizing seismic data, heavy mineral assemblages, geochemical data and zircon U-Pb ages, the main conclusions are as follows. There existed frequent fault-block activities in study area during the Yacheng deposition of Early Oligocene, which controlled the wedge-shaped disorderly fillings, and sediments chiefly came from the southern exposed tectonic uplift area of the QDNB. As it entered post-rifting stage and transgression continued, the provenance from the Pliocene to the Quaternary expanded to far- and multi-source realm, with Hainan Island, Red River and Indo-China Peninsula being source areas. The Proterozoic metamorphic basement, which supplied main material sources for the Yacheng Formation of Well LS33A, existed in the southern tectonic uplift area. Two large-scale magmatic activities, occurring in the southern uplift area in the Indosinian (214-237 Ma) and Yanshanian (95-106 Ma), not only destroyed the original metamorphic basement, but also provided an acidic magmatic provenance to study area.
会议录	1ST INTERNATIONAL GLOBAL ON RENEWABLE ENERGY AND DEVELOPMENT (IGRED 2017)
会议录出版者	IOP PUBLISHING LTD
会议录出版地	DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
语种	英语
资助项目	National Science and Technology Major Project[2011ZX05025-002-03]
WOS研究方向	Science & Technology - Other Topics ; Energy & Fuels ; Environmental Sciences & Ecology
WOS记录号	WOS:000446442600202
内容类型	会议论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/4947]
专题	自然资源部第一海洋研究所
作者单位	1.State Ocean Adm, North China Sea Environm Monitoring Ctr, Qingdao 266033, Peoples R China; 2.Ocean Univ China, Key Lab Submarine Geosci & Technol, Minist Educ, Qingdao 266100, Peoples R China; 3.CNOOC Ltd, Zhanjiang Branch, Zhanjiang 524057, Peoples R China
推荐引用方式 GB/T 7714	Xiu, C.,Sun, Z. P.,Zhai, S. K.,et al. U-Pb ages of detrital zircons from deep-water Well LS33A at Lingnan Low Uplift of the Qiongdongnan Basin and their geological significances[C]. 见:.