南极洲莫德王后山脉威尔伯山花岗岩的钾-氩年龄。

Potassium-Argon Age from a Granite at Mount Wilbur, Queen Maud Range, Antarctica.

出版信息

Science. 1965 Nov 5;150(3697):741-3. doi: 10.1126/science.150.3697.741.

DOI:10.1126/science.150.3697.741

Abstract

The basement complex of the Robert Scott Glacier area, Queen Maud Range, Antarctica, consists of a complex suite of metasedimentary and metavolcanic rocks intruded by light gray biotite granite. Brown biotite from a granite at Mount Wilbur was dated by the potassium-argon method at 470 +/- 14 million years; this age coincides closely with many other ages from granitic rocks in the Transantarctic Mountains.

摘要

南极洲莫德皇后山脉罗伯特·斯科特冰川地区的基底杂岩由一套复杂的变质沉积岩和变质火山岩组成，其中侵入了浅灰色黑云母花岗岩。威尔伯山一座花岗岩中的棕色黑云母，经钾-氩法测定年龄为 4.70 亿±1400 万年；这个年龄与横贯南极山脉许多其他花岗岩的年龄非常接近。