Quantitative glacial chronologies of past glaciations are sparse in the Himalaya,and mostly absent in the Kashmir Himalaya.We used cosmogenic 10Be exposure dating,and geomorphological mapping to recon-struct glacial advances of the Thajwas Glacier(TG)in the Great Himalayan Range of the Kashmir Himalaya.From 10Be exposure dating of ten moraine boulders,four glacial stages with ages～20.77±2.28 ka,～11.46±1.69 ka,～9.12±1.39 ka and～4.19±0.78 ka,were identified.The reconstructed cos-mogenic radionuclide ages confirmed the global Last Glacial Maximum(gLGM),Younger Dryas,Early Holocene,and Neoglaciation episodes.As per area and volume change analyses,the TG has lost 51.1 km2 of its area and a volume of 2.64 km3 during the last 20.77±2.28 ka.Overall,the results sug-gested that the TG has lost 64％of area and 73％of volume from the Last glacial maximum to Neoglaciation and about 85.74％and 87.67％of area and volume,respectively,from Neoglaciation to the present day.The equilibrium line altitude of the TG fluctuated from 4238 m a.s.l present to 3365 m a.s.l during the gLGM(20.77±2.28 ka).The significant cooling induced by a drop in mean ambi-ent temperature resulted in a positive mass balance of the TG during the gLGM.Subsequently the melting accelerated due to the continuing rise of the global ambient temperature.Paleo-glacial history recon-struction of the Kashmir Himalaya,with its specific geomorphic and climatic setting,would help close the information gap about the chronology of past regional glacial episodes.

Omar Jaan Paul;Shakil Ahmad Romshoo;Reyaz Ahmad Dar;Pankaj Kumar;Soumya Prakash Dhal;Sundeep Chopra

Department of Earth Sciences,University of Kashmir,Srinagar,India;Islamic University of Science and Technology(IUST),Kashmir,India;Inter-University Accelerator Centre(IUAC),New Delhi,India;Department of Geoinformatics,University of Kashmir,Srinagar,India

地学前缘（英文版）

[1]Omar Jaan Paul;Shakil Ahmad Romshoo;Reyaz Ahmad Dar;Pankaj Kumar;Soumya Prakash Dhal;Sundeep Chopra-.Paleo-glacial reconstruction of the Thajwas glacier in the Kashmir Himalaya using 10Be cosmogenic radionuclide dating)[J].地学前缘（英文版）,2022(06):30-40

Thajwas,chronologies,mogenic,gLGM,Neoglaciation

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