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Subglacially-formed debris-rich chemical deposits were found both on bedrock surface andin bedrock crevice on the edge of Qiangyong Glacier, one of the continental glaciers in Tibet. Grainsize distribution, internal structures and chemical components of the chemical deposits were analyzed.It can be inferred that the temperature of some part of the ice-bedrock interface is close to themelting point and there exists pressure melting water under Qiangyong Glacier. Debris, especiallythose from continental aerosols, can release Ca~(++) in the water. At the lee-side of obstacles on glacierbed the CO_2 in the melting water might escape from the water and the melting water might refreeze
Subglacially-formed debris-rich chemical deposits were found both on bedrock surface and in bedrock crevice on the edge of Qiangyong Glacier, one of the continental glaciers in Tibet. Grainsize distribution, internal structures and chemical components of the chemical deposits were analyzed. It can be inferred that the temperature of some part of the ice-bedrock interface is close to themelting point and there exists pressure melting water under Qiangyong Glacier. Debris, especiallythose from continental aerosols, can release Ca ~ (++) in the water. At the lee -side of obstacles on glacierbed the CO_2 in the melting water might escape from the water and the melting water might refreeze