干旱区生态环境知识资源中心(Arid): Calcretes from the Quaternary alluvial deposit of Purna basin, central India: Lithological and climatic controls

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DOI	10.1016/j.rhisph.2021.100343
	Calcretes from the Quaternary alluvial deposit of Purna basin, central India: Lithological and climatic controls
	Srivastava, Ashok K.; Bansod, Mangla N.; Khare, N.
通讯作者	Srivastava, AK (corresponding author), SGB Amravati Univ, Dept Geol, Amravati 444602, India.
来源期刊	RHIZOSPHERE
EISSN	2452-2198
出版年	2021
卷号	18
英文摘要	The Purna alluvial basin of central India, infilled largely with areno-argillaceous sediments of Quaternary age, is also marked by occurrences of both pedogenic and non pedogenic calcretes of diverse shape and size. The previous includes nodular, laminar, hardpan and root calcretes along with rhizolith balls and rhizospheres, whereas non pedogenic type is represented by groundwater calcretes. These calcretes have been investigated for their morphological details, lithological associations in both vertical and lateral profiles of the alluvial deposit and paleoclimatic reconstructions. This study shows that the area under investigation has undergone through subtropical, arid and semiarid climatic conditions having low to medium humidity, high rainfall and evaporation that favored formation of various types of calcretes. Nodular calcretes, the most dominant morphotype, are preserved in a wide spectrum of lithology and fluvio-lacustrine environment. To some extent, their formation is controlled by parent material, irregular rainfall and mild temperature. Rapid accumulation of carbonate material, in and around the plant roots giving rise root calcretes of various shapes and size is a common phenomenon in warm and dry climatic conditions. Both hardpan and groundwater calcretes are formed due to CaCO3 precipitations in humid condition having heavy rainfall. Besides, the later also indicates arid to semiarid conditions facilitating the movement of Ca rich solution in the unconsolidated sediments through capillary action that later deposited calcium carbonate in the voids during wet and dry conditions. Well preserved rhizolith balls and rhizospheres in the palaeosols, constituting together the lower part of succession in almost entire alluvial basin, acts as potential paleoclimatic indicator.
英文关键词	Calcretes Alluvial deposit Paleoclimate Purna basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000663433200004
WOS关键词	HOLOCENE ENVIRONMENTAL-CHANGES ; PEDOGENIC CARBONATE NODULES ; LOWER NARMADA VALLEY ; THAR-DESERT ; WESTERN INDIA ; SABARMATI RIVER ; SILICATE ROCKS ; PALEOCLIMATIC RECONSTRUCTION ; LUMINESCENCE CHRONOLOGY ; FLUVIAL SEQUENCES
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351603
作者单位	[Srivastava, Ashok K.; Bansod, Mangla N.] SGB Amravati Univ, Dept Geol, Amravati 444602, India; [Khare, N.] Minist Earth Sci, Lodhi Rd, New Delhi 110003, India
推荐引用方式 GB/T 7714	Srivastava, Ashok K.,Bansod, Mangla N.,Khare, N.. Calcretes from the Quaternary alluvial deposit of Purna basin, central India: Lithological and climatic controls[J],2021,18.
APA	Srivastava, Ashok K.,Bansod, Mangla N.,&Khare, N..(2021).Calcretes from the Quaternary alluvial deposit of Purna basin, central India: Lithological and climatic controls.RHIZOSPHERE,18.
MLA	Srivastava, Ashok K.,et al."Calcretes from the Quaternary alluvial deposit of Purna basin, central India: Lithological and climatic controls".RHIZOSPHERE 18(2021).