Mesozoic erosion rates in northern New England.

被引：0
|
作者：
Doherty, J.T. [1 ]
Lyons, J.B. [1 ]
机构：
[1] Weston Geophysical Corporation, Westboro, Massachusetts 01581. Dept of East Sciences, Dartmouth College, Hanover, New Hampshire 03755.
来源：
Geological Society of America Bulletin | 1980年 / 91卷 / 1 pt I期
关键词：
Zircon - Heat conduction - Fission reactions - Erosion;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Ten stocks of the White Mountain Plutonic-Volcanic Series in New Hampshire have been sampled, and have yielded material for nine apatite and six zircon fission-track dates. The differences between zircon and apatite ages have been used in conjunction with heat-conduction theory to show that 180 Myr ago ambient wallrock temperatures of White Mountain intrusives (at the present erosion level) were c.170 to 200oC. These numbers indicate an average erosion rate, since Jurassic time, of 1 km per 32 Myr (0.031 mm/yr). Jurassic isobaric surfaces are now tilted northeastward at an approximate gradient of 0.012 to 0.015 km per Km. -from Authors
引用
收藏
页码：16 / 20
相关论文
共 50 条
12345