干旱区生态环境知识资源中心(Arid): Study on the Late Cretaceous paleoenvironment documented by red beds in the western Fujian province

Arid

DOI	10.6038/cjg2020N0375
	Study on the Late Cretaceous paleoenvironment documented by red beds in the western Fujian province
	Chen JinNiu 1,2; Mao XueGang 1,2,3; Shi YongHui 1,2; Liu XiuMing 1,2,3,4
通讯作者	Mao XueGang
来源期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN	0001-5733
出版年	2020
卷号	63 期号:4 页码:1553-1568
英文摘要	The Cretaceous red beds in southeastern China are regarded as terrestrial elastic sediments, whose paleoenvironmental implication is still in debate. They are conventionally regarded as lacustrine-fluvial sediments in basin. In present study, the late Cretaceous paleoenvironment documented by red beds (Liancheng and Guanzhaishan section) in the western Fujian province were investigated based on environmental magnetism, grain size, geochemistry and paleosols.The results show that : (1) The red beds in the western Fujian, mostly in form of interbedded siltstone and sandstone with gravels, are dominated by fine silt particles with less clay and sand. The dominant magnetic carrier in red beds is hematite, which attributes to low values of magnetic susceptibility in the two sections. (2) The weathering degree, reflected by chemical index of alteration (CIA), is moderate as those formed in warm and humid climate. In addition, the rare earth elements (REE) of red beds show enriched light rare earth element (LREE), depleted heavy rare earth elements (HREE) , enrichment of Ce and negative Eu anomaly, which resembled that of average upper continental crust (UCC) , thus indicating thoroughly mixing sediments. (3) Although paleosols were recognized in the red beds, in particular GZS section, these paleosols were weakly developed with no evident of B horizon (e. g. Bk and Bt) in paleosol profile. The conflict between moderate chemical weathering degree and weak pedogensis infers that the red bed sediments had experienced to an extent chemical weathering in source area before deposition. After deposition, the red sediments were hardly chemically weathered. It should be noted that the red beds solely cannot indicate paleoenvironment, which must take paleosols into account. (4) The late cretaceous paleoenvironment in western Fujian was suspected to be arid and semiarid. The hematite in red beds were mainly derived from source area, indicating well-drained dry oxidizing environment, rather than aqueous condition. This work provides an alternative prospect in studying Cretaceous red beds.
英文关键词	Red beds Late Cretaceous Environmental magnetism Paleosols
类型	Article
语种	中文
国家	Peoples R China ; Australia
收录类别	SCI-E
WOS记录号	WOS:000524071300023
WOS关键词	MAGNETIC-PROPERTIES ; PALEOSOLS ; CHINA ; SOILS ; PALEOGEOGRAPHY ; SUSCEPTIBILITY ; PALEOCLIMATE ; ENVIRONMENT ; INDICATORS ; DEPOSITS
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314259
作者单位	1.Fujian Normal Univ, Coll Geog Sci, Fuzhou 350007, Peoples R China; 2.Fujian Normal Univ, State Key Lab Subtrop Mt Ecol, Minist Sci & Technol & Fujian Prov, Fuzhou 350007, Peoples R China; 3.Fujian Normal Univ, Inst Geog, Fuzhou 350007, Peoples R China; 4.Macquarie Univ, Dept Environm & Geog, Sydney, NSW 2109, Australia
推荐引用方式 GB/T 7714	Chen JinNiu,Mao XueGang,Shi YongHui,et al. Study on the Late Cretaceous paleoenvironment documented by red beds in the western Fujian province[J],2020,63(4):1553-1568.
APA	Chen JinNiu,Mao XueGang,Shi YongHui,&Liu XiuMing.(2020).Study on the Late Cretaceous paleoenvironment documented by red beds in the western Fujian province.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(4),1553-1568.
MLA	Chen JinNiu,et al."Study on the Late Cretaceous paleoenvironment documented by red beds in the western Fujian province".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.4(2020):1553-1568.