DTA CHARACTER OF BIOTITE OF DIFFERENT GENETIC TYPES AND THEIR IMPLICATIONS

• 作 者: 陈国玺
• 机 构: Guiyang Institute of Geochemistry, Academia Sinica
• 出 处: Science Bulletin
• 发表日期: 1988年13期
• 关键词: crust mantle granite melting apparently releasing dehydration rations facilitati

Detailed DTA measurements were made on 46 biotite samples from granites of different genetic types in South China and 35 in the Sanjiang area. The DTA curves and shape of melting products differ apparently between biotites of different genetic types: (i) The peak temperature at which OH releases in crust-type granite biotite ranges from 1070—1150℃ for South China samples and 1050—1180℃ for Sanjiang samples. In contrast, the OH releasing temperature in crust-mantle type

Detailed DTA measurements were made on 46 biotite samples from granites of different genetic types in South China and 35 in the Sanjiang area. The DTA curves and shape of melting products differ apparently between biotites of different genetic types: (i) The peak temperature at which OH releases in crust-type granite biotite ranges from 1070-1150 ° C for South China samples and 1050-1180 ° C for Sanjiang samples. In contrast, the OH releasing temperature in crust-mantle type