• 责任者：Liu Shoujie (Key Laboratory of Orogenic Belts and Crustal Evolution ; Ministry of Education ; Peking University ; Beijing 100871 ; China) ; Li Jianghai
• 刊名：Geological Journal of China Universities
• 出版年：2009
• 卷期：15(1)
• 关键词：超高压变质作用 ; ultra-high pressure metamorphism ; 高压变质带 ; metamorphic belt of high pressure ; 内蒙古 ; Inner Mongolia
• 页码：p.48-56
• 图表：5 illus., 35 refs.
• 分类号：0802
• issnNo：ISSN1006-7493
• isbnNo：CN32-1440/P

An ultra-high temperature (UHT) metamorphic rock belt occurs in Jining-Fengzhen-Tuguiwula, central part of southern Inner Mongolia. Detailed study on the mineral assemblages shows UHT indicators such as Spl+Qtz, Spr+Qtz and Opx+Sil+Qtz.UHT rocks underwent initial isobaric cooling followed by isothermal decompression in the field of UHT metamorphism. Available age data suggest peak metamorphism at 1 920 Ma followed by retrogressive metamorphism at 1 850 Ma of the UHT rocks. To the southeast, including Huai’an-Xuanhua area, outcropped a high pressure granulite, which has a isothermal decompression retrograde metamorphic history along a clockwise P-T path. Most of the ages show a peak metamorphism at ~1 900 Ma followed by a ca. 1 850 Ma retrograde metamorphism.