eprintid: 277
rev_number: 9
eprint_status: archive
userid: 7
dir: disk0/00/00/02/77
datestamp: 2010-02-16 16:10:25
lastmod: 2015-05-29 19:53:50
status_changed: 2010-02-16 16:10:25
type: report
metadata_visibility: show
item_issues_count: 0
creators_name: Pritchard, Geoffrey
creators_name: Moloney, Paul
creators_name: Russell, Ken
creators_name: Whiten, Bill
corp_creators: Keith Sircombe
title: Provenance of sedimentary rocks
ispublished: pub
subjects: materials
studygroups: misg26
companyname: Geoscience Australia
full_text_status: public
abstract: Understanding the origins, or provenance, of a sedimentary deposit is an important aspect of geology. Sedimentary rocks are derived from the erosion of other rocks and thus provide important records of the geological environment at the time they were deposited. Some minerals found in sedimentary rocks, such as zircon particles, can be dated using uranium-lead techniques to trace the age of their parent rock thus providing useful information about the geological environment.

Statistical and mathematical analyses that can assist in the analysis of the distribution of ages of the zircon crystals are examined. Methods of defining a difference between the distributions of ages found in rock samples are proposed, and demonstrated in the division of multiple rock samples into clusters of similar types.

A test for the existence of a cluster is developed, and statistics for comparing different rock samples examined. Estimating an accurate age for the sedimentary deposit itself proves to be difficult unless prior distributions providing significant extra information are available.
date: 2009
citation:   Pritchard, Geoffrey and Moloney, Paul and Russell, Ken and Whiten, Bill  (2009) Provenance of sedimentary rocks.  [Study Group Report]     
document_url: http://miis.maths.ox.ac.uk/miis/277/1/geomisg2009.pdf