According to the analysis of X-ray diffraction and the investigation under electron microscope (SEM, TEM) of clay minerals, the transformation of clay minerals in Triassic mudstone during burial metamorphism has been ...According to the analysis of X-ray diffraction and the investigation under electron microscope (SEM, TEM) of clay minerals, the transformation of clay minerals in Triassic mudstone during burial metamorphism has been studied in detail. Berthierine, the mixed layer of illite and chlorite, and the changeable texture from berthierine to chlorite have been first discovered in the paper; and then it is considered that the transformation of clay minerals during burial metamorphism is shown in the following reaction: Smectite+ Kaolinite + K^+ = lllite + Chlorite + Quartz. The metamorphic temperature of the above reaction is about 160—220℃, according to the calculation of oxygen isotope geothermometry of illite and quartz. The study of crystallinity and polytype of illite and chlorite shows that the different indexes have varied in regular way, and have certain functional relationship between them.展开更多
A kind of talc mudston’e is distributed wLdely in the Permian strata in the zone of Guniuling and Liujiawan, Leping, Jiangxi Province. It possesses all the nature Of talc, being dispersed and suspended in water, sint...A kind of talc mudston’e is distributed wLdely in the Permian strata in the zone of Guniuling and Liujiawan, Leping, Jiangxi Province. It possesses all the nature Of talc, being dispersed and suspended in water, sintered and with plasticity and particularity (less than 2μ in size). The talc mudstone is in close connection with sepiolite at spacetime. An explanation for the processes of formation is given in this note.展开更多
文摘According to the analysis of X-ray diffraction and the investigation under electron microscope (SEM, TEM) of clay minerals, the transformation of clay minerals in Triassic mudstone during burial metamorphism has been studied in detail. Berthierine, the mixed layer of illite and chlorite, and the changeable texture from berthierine to chlorite have been first discovered in the paper; and then it is considered that the transformation of clay minerals during burial metamorphism is shown in the following reaction: Smectite+ Kaolinite + K^+ = lllite + Chlorite + Quartz. The metamorphic temperature of the above reaction is about 160—220℃, according to the calculation of oxygen isotope geothermometry of illite and quartz. The study of crystallinity and polytype of illite and chlorite shows that the different indexes have varied in regular way, and have certain functional relationship between them.
文摘A kind of talc mudston’e is distributed wLdely in the Permian strata in the zone of Guniuling and Liujiawan, Leping, Jiangxi Province. It possesses all the nature Of talc, being dispersed and suspended in water, sintered and with plasticity and particularity (less than 2μ in size). The talc mudstone is in close connection with sepiolite at spacetime. An explanation for the processes of formation is given in this note.
