Detrital zircon U-Pb age and Hf-isotope perspective on sediment provenance and tectonic models in SE Asia

Benjamin Clements*, Inga Sevastjanova, Robert Hall, Elena A. Belousova, William L. Griffin, Norman Pearson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

13 Citations (Scopus)

Abstract

Detrital zircon U-Pb geochronology can make an extremely valuable contribution to provenance studies and paleogeographic reconstructions, but the technique cannot distinguish grains with similar ages derived from different sources. Hafnium isotope analysis of zircon crystals combined with U-Pb dating can help make such distinctions. Five Paleogene formations in West Java have U-Pb age populations of 80-50 Ma (Late Cretaceous-Paleogene), 145-74 Ma (Cretaceous), 298-202 Ma (Permian-Triassic), 653-480 Ma (mid-Neoproterozoic- latest Cambrian), and 1290- 723 Ma (late Mesoproterozoic-early Neoproterozoic). Hf-isotopes have been analyzed for 311 zircons from these formations. Differences in zircon U-Pb age and Hf-isotope populations refl ect changing sources with time. Late Cretaceous and Paleogene zircons are interpreted as having been derived from two temporally discrete volcanic arcs in Java and West Sulawesi, respectively. The Java arc was active before microcontinent collision, and the W Sulawesi arc developed later, on newly accreted crust at the SE Sundaland margin. The collision age is estimated to be ca. 80 Ma. U-Pb age and 176Hf/177Hfi characteristics allow a distinction to be made between Cretaceous granitic and volcanic arc sources. Zircons that are older than ca. 80 Ma have a continental Sundaland provenance. Mid-Cretaceous zircons in all upper Eocene and lower Oligocene formations were derived from granites of the Schwaner Mountains of SW Borneo. Permian-Triassic zircons were derived predominantly from granites in the SE Asian Tin Belt. 176Hf/177Hfi ratios permit distinction between Tin Belt granites in the Main Range and Eastern Provinces, and indicate that only the lower Oligocene Cijengkol Formation contains signifi cant input from the Main Range Province, suggesting a partial change in drainage pattern. Older zircon ages are more diffi cult to interpret but probably record contributions from allochthonous basement and sedimentary rocks that were deposited prior to rifting of continental blocks from Gondwana in the early Mesozoic.

Original languageEnglish
Title of host publicationMineralogical and Geochemical Approaches to Provenance
EditorsE. Troy Rasbury, Sidney R. Hemming, Nancy R. Riggs
Place of PublicationBoulder, CO
PublisherGeological Society of America
Pages37-61
Number of pages25
Volume487
ISBN (Print)9780813724874
DOIs
Publication statusPublished - 2012

Publication series

NameSpecial Paper of the Geological Society of America
Volume487
ISSN (Print)00721077

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    Clements, B., Sevastjanova, I., Hall, R., Belousova, E. A., Griffin, W. L., & Pearson, N. (2012). Detrital zircon U-Pb age and Hf-isotope perspective on sediment provenance and tectonic models in SE Asia. In E. T. Rasbury, S. R. Hemming, & N. R. Riggs (Eds.), Mineralogical and Geochemical Approaches to Provenance (Vol. 487, pp. 37-61). (Special Paper of the Geological Society of America; Vol. 487). Boulder, CO: Geological Society of America. https://doi.org/10.1130/2012.2487(03)