蓝岭地区上寒武纪长英质火山岩的锆石年龄。阿巴拉契亚山脉。

Zircon ages of felsic volcanic rocks in the upper precambrian of the blue ridge, appalachian mountains.

出版信息

Science. 1969 Nov 7;166(3906):741-4. doi: 10.1126/science.166.3906.741.

DOI:10.1126/science.166.3906.741

Abstract

Five Zirconi samples from Pennsylvania, Virginia, and North Carolina yield discordant uranium-lead ages which suggest an original age of 820 million years and an episodic lead loss at 240 million years. The indicated age of lead loss is interpreted as the age of movement of the Blue Ridge thrust sheet.

摘要

宾夕法尼亚州、弗吉尼亚州和北卡罗来纳州的五个锆石样本产生了不一致的铀铅年龄，这表明原始年龄为 8.2 亿年，并有 2.4 亿年的阶段性铅丢失。指示的铅丢失年龄被解释为蓝岭冲断片的运动年龄。