The aureole of the Traigh Bhán na Sgùrra sill, Isle of Mull; reaction-driven microcracking during pyrometamorphism

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doi: 10.1093/petrology/43.3.511
Authors:Holness, Marian B.; Watt, G. R.
Author Affiliations:Primary:
University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom
University of Aberdeen, United Kingdom
Volume Title:Journal of Petrology
Source:Journal of Petrology, 43(3), p.511-534. Publisher: Oxford University Press, Oxford, United Kingdom. ISSN: 0022-3530
Publication Date:2002
Note:In English. 64 refs.; illus., incl. 1 table, geol. sketch map
Summary:Intrusion of a 6m thick Tertiary gabbro sill into garnet grade pelitic gneiss and psammite at 600 bars gave a 3m contact aureole. Modelling indicates a 5 month period of turbulent magma flow. Five generations of micro-cracks are identified in, and described from the psammite but melt segregation into the cracks did not occur, despite melting at grain boundaries showing that on this time scale, melt segregation does not occur in such static anatectic environments even when there is micro-cracking. [B.E.L.]
Subsections:Metamorphism: thermal, metasomatic
Subjects:Aureoles; Cenozoic; Contact metamorphism; Cracks; Intrusions; Melting; Metamorphism; Metasomatism; Microcracks; Pyrometasomatism; Sills; Tertiary; Europe; Great Britain; Scotland; United Kingdom; Western Europe; Isle of Mull; Traigh Bhan na Sgurra
Abstract Numbers:02M/3583
Record ID:2002026480
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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