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- Title
Low-Ca contents and kink-banded textures are not unique to mantle olivine: evidence from the Duke Island Complex, Alaska.
- Authors
Li, Chusi; Thakurta, Joyashish; Ripley, Edward
- Abstract
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.
- Subjects
ALASKA; METALS; CRYSTAL texture; PERIDOTITE; OLIVINE; ISLANDS; INCLUSIONS in igneous rocks; EARTH'S mantle; EARTH (Planet)
- Publication
Mineralogy & Petrology, 2012, Vol 104, Issue 3/4, p147
- ISSN
0930-0708
- Publication type
Academic Journal
- DOI
10.1007/s00710-011-0188-0