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Liu Shuwen
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Abstract: Fuping granulites distribute in Fuping gneiss complex, and correspond to the Suojiazhuang formation of the Fuping supergroup at Daliushu, Fangli and other regions in Fuping county. They occur lens and layered bodies in different scales. Granulites consist of garnet, clinopyroxen-orthopyroxene, amphibole, plagioclase and a few quartz. Depending on metamorphic textures and reactive relationships among minerals, the evolution of metamorphism can be divided into four stages: ① the pre peak stage which was represented by mineral inclusions of amphiboles. plagioclase and clinopyroxene in coarse garnet; ② the most principal mineral assemblage which contains coarse grain garnet, amphibole, clinopyroxene?plagioclase、a few hypersthene and quartz; ③ irregular fine grain assemblage of hypersthene, plagioclase and quartz at outer part of symplectic rims around porphyroblasts garnet is the post-peak mineral association; and ④ the fine grain amphibole, plagioelase and quartz at the inner part of the symplectic rim were form ed in late retrometamorphie stage. In orders, P-T conditions during the evolution of metamorphism are: 636℃ and 0.824Gpa at pre-peak, 51~833℃ and 0.854~1.085Gpa at peak. 670~740℃ and 0. 55~0.70Gpa at post-peak?and 665℃and 0.727Gpa at retrometarnorphic stage. They construct a clockwise P-T path?which suggest that this metamorphic terrain had experienced the geodynamic processes from early folding-crust thickening to Later tectonic uplifting of the Archean crust.
Liu Shuwen. STUDY ON THE P-T PATH OF GRANULITES IN FUPING AREA, HEBEI PROVINCE[J]. J4.
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https://geology.nju.edu.cn/EN/Y1996/V2/I1/75