The geochemistry of the Ben Hope Sill suite, northern Scotland, U.K.
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|Authors:||Winchester, J. A.; Floyd, P. A.|
|Author Affiliations:||Primary: |
Univ. Keele, Dep. Geol., Keele, United Kingdom
|Volume Title:||Chemical Geology|
|Source:||Chemical Geology, 43(1-2), p.49-75. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0009-2541|
|Note:||In English. 38 refs.; illus. incl. 10 tables, geol. sketch map|
|Summary:||Immobile trace-element geochemistry was used to study this suite of sills which were intruded into the Morar Division Moine sediments before the area was deformed in the late Precambrian. These ortho-amphibolites are a series of chemically discrete, but related, and variously fractionated tholeiitic sills. Amphibolites from the nearby Meadie sill belong to the same suite, which can be distinguished chemically from other early basic bodies in northern Scotland. Chemical discrimination of the tectonic setting confirms a within-plate environment for most segments of the Ben Hope sill suite, but some amphibolites have plate-margin characteristics which conflict with the field evidence. This may reflect magmatic effects rather than a change in the tectonic environment. Major- and trace-element analyses of 76 Ben Hope sills are presented, with mean composition and standard deviations from 7 members of the suite. [P.Br.]|
|Subjects:||Amphibolite facies; Differentiation; Facies; Fractional crystallization; Genesis; Geochemistry; Intrusions; Mafic composition; Magmas; Metamorphic rocks; Metaplutonic rocks; Mineral composition; Petrology; Precambrian; Sills; Spectra; Tholeiitic composition; Trace elements; X-ray fluorescence spectra; Caledonides; Europe; Great Britain; Scotland; United Kingdom; Western Europe; Ben Hope Sill; Intraplate tectonics|
|Coordinates:||N581500 N583500 W0042000 W0044000|
|Copyright Information:||GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom|
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