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	Compositional distribution and growth mode of garnet porphyroblasts during deformation and metamorphism
	Zhao, GP ; Liu, SW ; Liu, LH
	2004
关键词	synchrotron Radiation X-ray Fluorescence Analysis deformation partition porphyroblast growth phase Baoyintu Group SIGMOIDAL INCLUSION TRAILS FOLIATION DEVELOPMENT OROGENESIS ROTATION ROCKS STAIRCASE EXAMPLE AREA AXES
英文摘要	Although porphyroblast microstructures play an important role in structural and metamorphic studies, there are still controversies in the interpretation. The focus is how porphyroblasts grow during deformation and metamorphism. In this paper, we introduce a new approach, the Synchrotron Radiation X-Ray Fluorescence, to a hemi -quantitative interpretation of the growth mode of porphyroblasts. The analysis was done at the Beijing Synchrotron Radiation Facility. The specimens were sampled from metapelite of the Baoyintu Group, northern Urad Middle Banner, Inner Mongolia. The new method is successful for determining the microscopic distribution of trace elements in porphybroblasts. The results support the theory of deformation partition, which has been brought forth by Bell and his colleagues, and demonstrate the existence of porphyroblast growth phases and the growth mode of porphyroblasts by hemi-quantitative mineral chemical analysis. The porphyroblast grows stage by stage in the manner of the distribution of a roseleaf and is controlled by deformation. We call the growth stage of porphyroblast a growth phase.; Geosciences, Multidisciplinary; SCI(E); CPCI-S(ISTP); 0
语种	英语
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/255576]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhao, GP,Liu, SW,Liu, LH. Compositional distribution and growth mode of garnet porphyroblasts during deformation and metamorphism. 2004-01-01.

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