Testing the validity of chrome spinel chemistry as a provenance and petrogenetic indicator

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doi: 10.1130/0091-7613(2000)28<1027:TTVOCS>2.0.CO;2
Authors:Power, Matthew R.; Pirrie, Duncan; Andersen, Jens C. O.; Wheeler, Paul D.
Author Affiliations:Primary:
University of Exeter, Camborne School of Mines, Redruth, United Kingdom
Volume Title:Geology (Boulder)
Source:Geology (Boulder), 28(11), p.1027-1030. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613
Publication Date:2000
Note:In English. With GSA Data Repository Item 2000105. 18 refs.; illus., incl. sketch map
Summary:In situ and detrital chrome spinels from the Rum layered intrusion, Scotland, show a wide compositional range. In situ, within-seam spinels are relatively rich in Al and Mg, and poor in Ti, Cr, and total Fe. In contrast, detrital spinels have high Cr, total Fe, and Ti contents and low Al and Mg contents and were derived from spinels disseminated throughout the complex. Our data show that the widely used petrogenetic discrimination diagrams are not based on representative data and cannot, therefore, be applied in either provenance studies or the interpretation of altered ophiolitic bodies.
Sections:Mineral data
Subjects:Chemical composition; Chrome spinel; Chromitite; Crystal chemistry; Detritus; Experimental studies; Geochemical indicators; Geochemistry; Igneous rocks; Intrusions; Layered intrusions; Oxides; Plutonic rocks; Provenance; SEM data; Ultramafics; Europe; Great Britain; Hebrides; Highland region Scotland; Inner Hebrides; Inverness-shire Scotland; Rhum; Scotland; United Kingdom; Western Europe
Coordinates:N565500 N570500 W0061500 W0063000
Abstract Numbers:01M/2054
Record ID:2000075414
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
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