Characteristic features of ore gabbro formation in the third layer of the oceanic crust

Peculiarities of ore gabbro formation in slow-spreading mid-ocean ridges exemplified by the non-transform Sierra Leone fault and Marathon fault areas are considered. The formation of ore gabbros is most often connected with the rheologically weakened oceanic lithosphere mainly with active fault zone...

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Bibliographic Details
Published in:Doklady earth sciences 2009-07, Vol.427 (1), p.711-714
Main Author: Eskin, A. E.
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Geology
Lithosphere
Marine
Marine geology
Oceanic crust
Oceanography
Rocks
Studies
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Summary:Peculiarities of ore gabbro formation in slow-spreading mid-ocean ridges exemplified by the non-transform Sierra Leone fault and Marathon fault areas are considered. The formation of ore gabbros is most often connected with the rheologically weakened oceanic lithosphere mainly with active fault zones, in which basic magmatic melts intruded. Those faults provide ways for migration of differentiated melts at different depth levels. When intruding and moving along fault zones, melts interacting with the mantle and crust host rocks are often already hydrated. Such interaction occurs largely in conditions of subsolidus deformations resulting in enrichment of melts with volatile components.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X09050018