Approaches and Advancement of the Study of Metamorphic p-T-t Paths
详细信息
- 责任者：Wei Chunjing (Key Laboratory of Orogenic Belts and Crustal Evolution ; Ministry of Education ; School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China)
- 刊名：Earth Science Frontiers
- 出版年：2011
- 卷期：18(2)
- 关键词：P—T—t轨迹 ; P-T-t trace ; 变质作用 ; metamorphism
- 页码：p.1-16
- 图表：7 illus., 1 table, 52 refs.
- 分类号：0802
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
Development of the metamorphic p-T-t path has completely modified the understanding of metamorphic processes. The regional metamorphism in a thickened crustal region (orogenic belt) is considered to occur in a dynamic process from a tectonic perturbation to subsequent thermal relaxation. Thus, a p-T-t path for a rock is a function of models and mechanism of crustal thickening, of the rate of thermal relaxation and the rate of rock exhumation. The results from one-dimensional thermal modeling suggest that the tectonic perturbation would occur almost instantaneously and metamorphism starts to evolve during exhumation of rock. Two-dimensional thermal modeling indicates that there is pronounced heating during the crustal thickening (burial stage) and a rock reaches the maximum temperature during its exhumation as a result of a slight heating.