Low-Ca contents and kink-banded textures are not unique to mantle olivine: evidence from the Duke Island Complex, Alaska

被引：72

作者：

Li, Chusi ^{[1
]}

Thakurta, Joyashish ^{[2
]}

Ripley, Edward M. ^{[1
]}

机构：

[1] Indiana Univ, Dept Geol Sci, Bloomington, IN 47401 USA

[2] Ohio Univ, Dept Geol Sci, Athens, OH 45701 USA

来源：

MINERALOGY AND PETROLOGY | 2012年 / 104卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

NORTH CHINA CRATON; LITHOSPHERIC MANTLE; SOUTHEASTERN ALASKA; ULTRAMAFIC COMPLEX; FAR-EAST; KIMBERLITE; XENOLITHS; ORIGIN; MAGMAS; PYROXENITE;

D O I：

10.1007/s00710-011-0188-0

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Low-Ca contents and kink-banded textures in olivine with high Fo contents (>90 mol%) are widely used as indicators of mantle origin. Here we report the occurrence of this type of olivine in the peridotites of the Annette and Duke Island Complexes in southeastern Alaska which are interpreted to have formed at crustal depths. Our findings confirm that neither low-Ca contents nor kink-banded textures are unique to mantle olivine. Caution is warranted in using this type of olivine or peridotite xenoliths containing this type of olivine in volcanic rocks to decipher the nature of the mantle.

引用

页码：147 / 153

页数：7

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