Heavy minerals in provenance studies

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Authors:Morton, Andrew C.
Author Affiliations:Primary:
Br. Geol. Surv., Stratigr. and Sedimentol. Res. Group, Keyworth, United Kingdom
Volume Title:Provenance of arenites
Volume Authors:Zuffa, Gian Gaspare, editor
Source:NATO Advanced Study Institutes Series. Series C: Mathematical and Physical Sciences, Vol.148, p.249-277; NATO Advanced Study Institute on Provenance from arenites, Cetraro, Cosenza, Italy, June 3-11, 1984, edited by Gian Gaspare Zuffa. Publisher: D. Reidel Publishing Company, Dordrecht-Boston, International. ISSN: 0377-2071. ISBN: 90-277-1944-6
Publication Date:1985
Note:In English. 84 refs.; illus. incl. 5 tables, sketch map
Summary:Heavy minerals are sensitive indicators of provenance. Over 30 translucent detrital species are of common occurrence, many of which have characteristic parageneses. However, because they are also sensitive to the processes of weathering, transportation, deposition and diagenesis, the heavy-mineral suite of an arenite does not necessarily accurately reflect the source-area mineralogy. Hydraulic controls at the time of deposition and subsequent diagenesis (intrastratal solution) can cause major modifications. Hydraulic effects may be countered by the determination of hydraulic ratios or by using only those minerals whose proportions are not grain-size controlled, as shown by scatter plots. The most effective method to counteract problems of intrastratal solution, and indeed of hydraulic controls, is to examine the varieties of one mineral species (a 'varietal study') because this minimizes density and stability contrasts. Varietal studies may be addressed either by the classical methods of optical differentiation, or by more sophisticated techniques such as cathodoluminescence, radiometric dating, or particularly electron microprobe analysis. [C.N.]
Subjects:Beaches; Clastic rocks; Clastic sediments; Deposition; Diagenesis; Heavy minerals; Hydraulics; Paragenesis; Pore water; Provenance; Sand; Sandstone; Sedimentary rocks; Sedimentation; Sediments; Transport; Weathering; Atlantic Ocean; New Jersey; North Atlantic; North Sea; Rio Grande; United States
Abstract Numbers:87M/3426
Record ID:1986006908
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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