A MODEL FOR LOW-PRESSURE FACIES METAMORPHISM DURING CRUSTAL THICKENING

被引：146

作者：

LOOSVELD, RJH

ETHERIDGE, MA

机构：

[1] AUSTRALIAN NATL UNIV,DEPT GEOL,CANBERRA,ACT 2601,AUSTRALIA

[2] BUR MINERAL RESOURCES GEOL & GEOPHYS,CANBERRA,ACT 2601,AUSTRALIA

来源：

JOURNAL OF METAMORPHIC GEOLOGY | 1990年 / 8卷 / 03期

关键词：

crustal thickening; extensional models; lithospheric thinning; low‐P facies metamorphism; regional metamorphism;

D O I：

10.1111/j.1525-1314.1990.tb00472.x

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Low‐pressure metamorphic facies (i.e. high T/P ratios) are widespread in a wide range of tectonic settings. Explanations offered for the occurrence of these facies include extensional and/or magmatic models. However, these fail to explain that the low‐P facies metamorphism is commonly coeval with a phase of pervasive crustal thickening, with T/P ratios increasing during, or slightly lagging behind, the thickening. We propose an alternative explanation based on the approximate synchroneity of crustal thickening and erosion (thinning) of the mantle lithosphere. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：257 / 267

页数：11

共 74 条

[11] METAMORPHISM IN THE OLARY BLOCK, SOUTH-AUSTRALIA - COMPRESSION WITH COOLING IN A PROTEROZOIC FOLD BELT [J].