Mineral Magnetic and Geochemical Mapping of the Wular Lake Sediments, Kashmir Valley, NW Himalaya

IF 1.7 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS Aquatic Geochemistry Pub Date : 2019-12-13 DOI:10.1007/s10498-019-09364-9

Rayees A. Shah, Hema Achyuthan, Satish J. Sangode, Aasif M. Lone, Mohammd Rafiq

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引用次数: 8

Abstract

This study presents major element geochemistry, mineral magnetism and textural analysis of lake-bottom sediments collected from the Wular Lake located in the Kashmir Valley (northwest Himalaya). Connected to the Jhelum River, Wular Lake basin occupies?~?75% watershed area of the valley, covering?~?10,196?km², and makes it the major depo-centre for Kashmir Valley. The sediments represent dominant silt fraction with TiO₂, MgO, Fe₂O₃ and MnO enrichment; and depletion of Na₂O and P₂O₅ with reference to upper continental crust. The average CIA (64.17%) reflects moderate chemical weathering of the catchment source rocks. The mineral magnetic mapping identified distinct domains of restricted/reducing and?well-ventilated/oxic conditions, illustrating spatial environmental variability within the lake-bottom environments. The geochemical and mineral magnetic mapping therefore provides a baseline reference for emerging climate and anthropogenic changes being experienced in the Kashmir Valley.

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西北喜马拉雅克什米尔谷地Wular湖沉积物矿物磁地球化学填图

本文对喜马拉雅西北部喀什米尔山谷乌拉湖湖底沉积物进行了主要元素地球化学、矿物磁学和结构分析。乌拉尔湖盆地与耶赫勒姆河相连，占地面积约为1 ~ 2平方米。流域面积占流域总面积的75%，面积约10196平方公里。平方公里，使其成为克什米尔谷地的主要储藏中心。沉积物以粉砂组分为主，TiO2、MgO、Fe2O3和MnO富集;Na2O和P2O5的耗竭与上大陆地壳有关。平均CIA值为64.17%，反映了集水区烃源岩的中度化学风化作用。矿物磁图识别出限制/还原和?良好的通风/氧气条件，说明湖底环境的空间环境可变性。因此，地球化学和矿物磁测图为克什米尔山谷正在经历的新气候和人为变化提供了基线参考。

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来源期刊

Aquatic Geochemistry 地学-地球化学与地球物理

CiteScore

4.30

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： We publish original studies relating to the geochemistry of natural waters and their interactions with rocks and minerals under near Earth-surface conditions. Coverage includes theoretical, experimental, and modeling papers dealing with this subject area, as well as papers presenting observations of natural systems that stress major processes. The journal also presents `letter''-type papers for rapid publication and a limited number of review-type papers on topics of particularly broad interest or current major controversy.