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A lot of Mesozoic and Cenozoic granitoid rocks are widely distributed along the east coastalregion and in the southern part of Xizang, China. In order to study the altitude and latitude effect ofH-O isotopic system in these granitoid rocks, we have first studied the altitude and latitude effects ofδ~(18)O, δD values of recent meteoric water. The altitude and latitude effect equations of recent meteoricteoric water were established. The altitude effects of δD vaues for hydroxyl minerals from granitoid rocks inLhasa-Yadong region of Xizang were found. The average elevated rate of Xizang Plateau is 0.1 mm/yr.The δ~(18)O and δD values of whole rock samples for late Yanshanian miarolitic granite in the east coastalregion wete progressively lower as a function of latitude. The negative correlation between δ~(18)O and δDvalues in each miarolitic pluton represents the relationship between δ~(18)O, δD values of rocks or mineralsand temperatures in the condition with the same ω/r ratio in the interactiv
A lot of Mesozoic and Cenozoic granitoid rocks are widely distributed along the east coastal region and in the southern part of Xizang, China. In order to study the altitude and latitude effect of H-O isotopic system in these granitoid rocks, we have first studied the altitude and latitude effects of δ ~ (18) O, δD values of recent meteoric water. The altitude and latitude effect equations of recent meteoricteoric water were established. The altitude effects of δD vaues for hydroxyl minerals from granitoid rocks in Lhasa-Yadong region of Xizang were . The average elevated rate of Xizang Plateau is 0.1 mm / yr. The δ ~ (18) O and δD values of whole rock samples for late Yanshanian miarolitic granite in the east coastal region wete progressively lower as a function of latitude. The negative correlation between δ ~ (18) O and δDvalues in each miarolitic pluton represent the relationship between δ ~ (18) O, δD values of rocks or minerals and temperatures in the condition with the same ω / r ratio in the interactiv