干旱区生态环境知识资源中心(Arid): Geochemistry of the Laiyang Group from outcrops and Lingke-1 core on Lingshan Island, Shandong Province, Eastern China: implications for provenance, tectonic setting and palaeo-environment

Arid

DOI	10.1017/S0016756821000819
	Geochemistry of the Laiyang Group from outcrops and Lingke-1 core on Lingshan Island, Shandong Province, Eastern China: implications for provenance, tectonic setting and palaeo-environment
	Ma, Qing; Zhou, Yaoqi; Mu, Hongyu; Zhou, Tengfei; Zhao, Hanjie; Yin, Xingcheng; Liu, Yanzi
通讯作者	Zhou, YQ (corresponding author), China Univ Petr East China, Sch Geosci, Qingdao 266580, Shandong, Peoples R China.
来源期刊	GEOLOGICAL MAGAZINE
ISSN	0016-7568
EISSN	1469-5081
出版年	2022
卷号	159 期号:1 页码:37-54
英文摘要	Lower Cretaceous sedimentary rocks of Lingshan Island, located along the continental margin of East Asia, have received increased attention. The Lingke-1 core mainly belongs to the Lower Cretaceous Laiyang Group. We investigate provenance, tectonic setting, palaeoclimate and palaeoredox conditions in the study area using elemental geochemistry, thereby elucidating the depositional history of the Lower Cretaceous sediments and reconstructing the palaeo-environment. To achieve this, 90 siltstones and 76 mudstones were sampled from this core and other outcrops on Lingshan Island. The chemical index of alternation (CIA) values for the majority of the samples and the bivariate diagrams indicate that the sedimentary rocks were subjected to minor weathering processes. Geochemical results suggest that source rocks for the region are felsic igneous and metamorphic rocks, along with minor proportions of intermediate igneous rocks. Major- and trace-element discrimination diagrams, deciphering the tectonic history, indicate that source rocks mainly originated from the continental island-arc and active continental margin. Several representative geochemical indices and the bivariate plots based on elemental contents show that the Laiyang Group was predominantly deposited in arid conditions. Sr/Ba values suggest a palaeosalinity transition from brackish to saline, demonstrating a depositional transformation from lacustrine facies for the lower Laiyang Group to marine facies in the upper Laiyang Group. U/Th and V/(V+Ni) ratios and Ce anomalies in the rocks indicate anoxic conditions. We conclude that the conspicuous decline in the trends of the above three geochemical indices, ranging between 400 and 800 m, may be related to the latest Hauterivian oceanic anoxic event.
英文关键词	Lingshan Island Cretaceous Laiyang Group geochemistry provenance tectonic setting palaeo-environment
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000725817900005
WOS关键词	RARE-EARTH-ELEMENTS ; SEDIMENT DEFORMATION STRUCTURES ; CENTRAL INDIAN BASIN ; U-PB GEOCHRONOLOGY ; SEA-LEVEL CHANGES ; GULF-OF-MEXICO ; BLACK SHALES ; OIL-SHALE ; ORGANIC ACCUMULATION ; TIBET IMPLICATIONS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374410
作者单位	[Ma, Qing; Zhou, Yaoqi; Mu, Hongyu; Zhou, Tengfei; Zhao, Hanjie; Yin, Xingcheng; Liu, Yanzi] China Univ Petr East China, Sch Geosci, Qingdao 266580, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Ma, Qing,Zhou, Yaoqi,Mu, Hongyu,et al. Geochemistry of the Laiyang Group from outcrops and Lingke-1 core on Lingshan Island, Shandong Province, Eastern China: implications for provenance, tectonic setting and palaeo-environment[J],2022,159(1):37-54.
APA	Ma, Qing.,Zhou, Yaoqi.,Mu, Hongyu.,Zhou, Tengfei.,Zhao, Hanjie.,...&Liu, Yanzi.(2022).Geochemistry of the Laiyang Group from outcrops and Lingke-1 core on Lingshan Island, Shandong Province, Eastern China: implications for provenance, tectonic setting and palaeo-environment.GEOLOGICAL MAGAZINE,159(1),37-54.
MLA	Ma, Qing,et al."Geochemistry of the Laiyang Group from outcrops and Lingke-1 core on Lingshan Island, Shandong Province, Eastern China: implications for provenance, tectonic setting and palaeo-environment".GEOLOGICAL MAGAZINE 159.1(2022):37-54.