Skip to Main Content
GEOREF RECORD

Geological evidence and modeling of melt migration by porosity waves in the sub-arc mantle of Kohistan (Pakistan)

Pierre Bouilhol, James A. D. Connolly and Jean-Pierre Burg
Geological evidence and modeling of melt migration by porosity waves in the sub-arc mantle of Kohistan (Pakistan)
Geology (Boulder) (December 2011) 39 (12): 1091-1094

Abstract

Knowledge of melt transfer within the mantle is primarily from the study of mid-ocean ridge settings, leaving elusive the process of sub-arc melt transfer. The sub-arc mantle section of the Sapat Complex (Kohistan-Pakistan) exposes coarse-grained dunites that contain clinopyroxene-enriched zones, which in turn contain gabbroic lenses. Structural, petrological, and chemical relationships indicate that the clinopyroxene-enriched zones reflect a continuum of melt transport mechanisms between pervasive percolation and fully segregated melt flow. This spectrum of mechanisms and the petrographic features at Sapat are explained by mechanical flow instabilities (porosity waves) that cause channeling of pervasively distributed melt.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 39
Serial Issue: 12
Title: Geological evidence and modeling of melt migration by porosity waves in the sub-arc mantle of Kohistan (Pakistan)
Affiliation: ETH Zurich, Department of Earth Sciences, Zurich, Switzerland
Pages: 1091-1094
Published: 201112
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 33
Accession Number: 2012-007704
Categories: Igneous and metamorphic petrologySolid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2011329
Illustration Description: illus. incl. sect., sketch map
N35°00'00" - N35°04'60", E73°45'00" - E73°46'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201204
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal