Charles Darwin University

CDU eSpace
Institutional Repository

 
CDU Staff and Student only
 

Anomalous lead isotope ratios and provenance of offshore sediments, Gulf Carpentaria, northern Australia

Munksgaard, Niels C. and Parry, David L. (2000). Anomalous lead isotope ratios and provenance of offshore sediments, Gulf Carpentaria, northern Australia. Australian Journal of Earth Sciences,47(4):771-777.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 10 times in Scopus Article | Citations

Google Scholar Search Google Scholar

Title Anomalous lead isotope ratios and provenance of offshore sediments, Gulf Carpentaria, northern Australia
Author Munksgaard, Niels C.
Parry, David L.
Journal Name Australian Journal of Earth Sciences
Publication Date 2000
Volume Number 47
Issue Number 4
ISSN 0812-0099   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-0033821033
Start Page 771
End Page 777
Total Pages 7
Place of Publication Melbourne, Australia
Publisher Blackwell Publishing
HERDC Category C1 - Journal Article (DEST)
Abstract Anomalous Pb isotope ratios measured by Inductively Coupled Plasma Mass Spectrometry in terrigenous marine sediments (<63 m fraction) from the Gulf of Carpentaria originated from depositional mixing of clay/silt with average modern crustal Pb isotope ratios and detrital monazite with high 208Pb/206Pb and low 207Pb/206Pb. This interpretation is supported by strong correlations between Pb isotope ratio and Th, U and light rare-earth element concentrations in the sediments as well as by monazite compositional data. A likely source of the detrital monazite is the western portion of the Georgetown Inlier of mainly Proterozoic S-type granitic rocks. A clear distinction between Pb isotope ratios in sediments deposited from the Norman and Bynoe Rivers in the southeast Gulf of Carpentaria and the persistence of catchment-specific Pb isotope ratios 45 km offshore suggest that Pb isotope data are useful in tracing the provenance of terrigenous offshore sediments when the source rocks of catchments show sufficient chemical and/or mineralogical variation.
DOI http://dx.doi.org/10.1046/j.1440-0952.2000.00808.x   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
Versions
Version Filter Type
Access Statistics: 63 Abstract Views  -  Detailed Statistics
Created: Fri, 12 Sep 2008, 08:35:25 CST by Administrator