Quantifying three-dimensional silicate fabrics in cumulates using cumulative distribution functions

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doi: 10.1093/petrology/egh045
Authors:Gee, Jeffrey S.; Meurer, William P.; Selkin, Peter A.; Cheadle, Michael J.
Author Affiliations:Primary:
Scripps Institution of Oceanography, Geosciences Research Division, La Jolla, CA, United States
University of Houston, United States
University of Wyoming, United States
Volume Title:Journal of Petrology
Source:Journal of Petrology, 45(10), p.1983-2009. Publisher: Oxford University Press, Oxford, United Kingdom. ISSN: 0022-3530
Publication Date:2004
Note:In English. 45 refs.; illus., incl. 2 tables
Summary:A new method for quantifying three dimensional silcate fabrics from grain orientation data on three orthogonal sections is given and applied to the orientation of crystallographic features and so yields a fabric related to the preferred lattice orientation, although the method can also be used for preferred shape orientation or strain analysis based on passive linear markers. The orientation data for each section are represented by their cumulative distribution function, and an iterative procedure is used to find the symmetric second rank strain tensor that simultaneously satifies the cumulative distribution functions observed on each section.The method gives much better matches to sectional data than previous techniques. The method is tested on well-developed and weak fabrics in cumulates from the Stillwater Complex, Montana and compares favourably with the results given by electron back-scatter and magnetic techniques on the same rocks. [B.E.L.]
Subsections:Igneous petrology
Subjects:Cumulates; Fabric; Fractional crystallization; Magma chambers; Magmas; Precambrian; Quantitative analysis; Silicates; Stillwater Complex; Textures; Three-dimensional models; Montana; United States; Cumulative distribution functions
Abstract Numbers:04M/4208
Record ID:2005064553
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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