干旱区生态环境知识资源中心(Arid): Geochemical characteristics of Holocene sediments from Chuadanga district, Bangladesh: Implications for weathering, climate, redox conditions, provenance and tectonic setting

Arid

	Geochemical characteristics of Holocene sediments from Chuadanga district, Bangladesh: Implications for weathering, climate, redox conditions, provenance and tectonic setting
	Ismail Hossain; Krisna Kanta Roy; Pradip Kumar Biswas; Mahbubul Alam; Md Moniruzzaman; Farah Deeba
来源期刊	Chinese Journal of Geochemistry
ISSN	1000-9426
出版年	2014
卷号	33 期号:4 页码:336-350
英文摘要	The present research deals with the geochemical characteristics of the Holocene sediments from Alam-danga area, Chuadanga district, Bangladesh. Main goals of the study are to delineate source rock characteristics, degree of chemical weathering and sorting processes and behavior of redox conditions during deposition of the sediments. Geochemical characteristics of the sediments show comparatively a wide variation in accordance with stratigraphy in their major element contents (e.g. SiO_2 69.46-82.13, Al_2O_3 2.28-8.88 in wt%), reflecting the distinctive provenance and in part an unstable period in terms of tectonic activity. Geochemical classification of the sediments shows mostly sub-arkose with few sub-litharenites. Some major and trace elements display comprehensible correlation with A1203 confirming their possible hydraulic fractionation. The chemical index of alteration (CIA), W index, index of compositional variability (ICV), plagioclase index of alteration (PIA*) values and the ratio of SiO_2/Al_2O_3, suggest low degrees of chemical weathering in the source areas as well as immature to moderately mature the sediments. The sediments suggest semi-arid climatic trends within oxic deltaic depositional conditions during the Holocene, at 3-12 ka. Whole rock geochemistry and discrimination diagrams demonstrate the continental signature derivatives, which might have been derived from the felsic to intermediate igneous rocks (granitic plutonic rocks) as well as from quartzose sedimentary/metamorphic provenance. These typical sources are present in a vast region of the Himalayan belt and catchment areas of Ganges. The tectonic setting of the sediments demarcates typically passive margin with slightly continental arc system.
英文关键词	chemical index of alteration W* index compositional variability oxic condition deltaic deposit passive margin
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5256146
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335400
作者单位	Ismail Hossain, Department of Geology and Mining, University of Rajshahi, Bangladesh.; Krisna Kanta Roy, Department of Geology and Mining, University of Rajshahi, Bangladesh.; Pradip Kumar Biswas, Institute of Mining, Mineralogy and Metallurgy (IMMM), Joypurhat, Bangladesh.; Mahbubul Alam, Water Resource Planning Division, Institute of Water Modelling (IWM), Dhaka, Bangladesh.; Md Moniruzzaman, Institute of Nuclear Science and Technology (INST), Atomic Energy Commission, Dhaka, Bangladesh.; Farah Deeba, Institute of Nuclear Science and Technology (INST), Atomic Energy Commission, Dhaka, Bangladesh.
推荐引用方式 GB/T 7714	Ismail Hossain,Krisna Kanta Roy,Pradip Kumar Biswas,et al. Geochemical characteristics of Holocene sediments from Chuadanga district, Bangladesh: Implications for weathering, climate, redox conditions, provenance and tectonic setting[J],2014,33(4):336-350.
APA	Ismail Hossain,Krisna Kanta Roy,Pradip Kumar Biswas,Mahbubul Alam,Md Moniruzzaman,&Farah Deeba.(2014).Geochemical characteristics of Holocene sediments from Chuadanga district, Bangladesh: Implications for weathering, climate, redox conditions, provenance and tectonic setting.Chinese Journal of Geochemistry,33(4),336-350.
MLA	Ismail Hossain,et al."Geochemical characteristics of Holocene sediments from Chuadanga district, Bangladesh: Implications for weathering, climate, redox conditions, provenance and tectonic setting".Chinese Journal of Geochemistry 33.4(2014):336-350.