Results 191 to 200 of about 3,413 (232)

Detrital zircon REE and tectonic settings

Lithos
Earth's long-term history is preserved in the rock archive, yet this record is incomplete, hindering our understanding of how tectonic processes have evolved and shaped our planet's evolution. The physio-chemical resilience of zircon and its ability to be rapidly analyzed for age, isotopic, and elemental data has made it a key phase in unraveling Earth'
Hu, Pei-yuan, Zhai, Qing-guo, Cawood, Peter A., Weinberg, Roberto F., Zhao, Guo-chun, Zhou, Ren-jie, Tang, Yue, Liu, Yi-ming   +7 more
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A search for ancient detrital zircons in Zimbabwean sediments

Journal of the Geological Society, 1988
86 detrital zircon grains from Archaean quartzites from the Mweza and Shurugwi greenstone belts have been dated by the ion probe SHRIMP. Nine of these give ages of 3.75–3.80 Ga, older than any Zimbabwean rocks so far satisfactorily dated, and the Tokwe-Zvishavane gneisses are a possible source for these old grains.
M. H. DODSON, W. COMPSTON, I. S. WILLIAMS, J. F. WILSON   +3 more
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Detrital-zircon geochronology of the northeastern Tibetan plateau

Geological Society of America Bulletin, 2003
U-Pb geochronologic analyses have been conducted on 413 detrital-zircon grains collected from 16 samples in the Altun Shan, Nan Shan, and Qilian Shan. The samples come primarily from quartz arenites and metaturbidites of Middle to Late Proterozoic age and from feldspathic and volcanic clast-rich sandstones of early Paleozoic age.
George E. Gehrels, An Yin, Xiao-Feng Wang   +2 more
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Mineral inclusion assemblage and detrital zircon provenance

Chemical Geology, 2018
Abstract Mineral inclusions are common in magmatic zircon and a potentially rich source of petrologic information. Controls on the relative proportions of inclusion phases, specifically early-crystallizing minerals such as apatite and late-crystallizing phases such as quartz, K-feldspar, and muscovite, have not been systematically studied.
Elizabeth A. Bell, Patrick Boehnke, T. Mark Harrison, Matthew M. Wielicki   +3 more
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Persistence of Grenvillian dominance in Laurentian detrital zircon age systematics explained by sedimentary recycling: Evidence from detrital zircon double dating and detrital monazite textures and geochronology

Geology, 2020
AbstractGrenvillian ages dominate Neoproterozoic to Paleozoic detrital zircon (DZ) populations across eastern Laurentia and persist through the present. The persistence of this dominance is inferred to result from recycling of DZ grains ultimately sourced from exceptionally Zr-rich and zircon-fertile Grenvillian granitoids.
S.C. Zotto, D.P. Moecher, N.A. Niemi, J.R. Thigpen, S.D. Samson   +4 more
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Detrital zircon reference for the North China block

Journal of Asian Earth Sciences, 2006
Abstract U–Pb analyses of 250 single detrital zircons from Upper Proterozoic to Ordovician strata collected from the Zhuozi Shan in north-central China provide a detrital zircon reference for the North China block, a major crustal entity in the Asian tectonic collage.
Brian J. Darby, George Gehrels
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VOLUMETRIC CHARACTERIZATION OF ZIRCON IN SUPPORT OF DETRITAL GEOCHRONOLOGY

Geological Society of America Abstracts with Programs
Zircon is one of the most studied accessory minerals because of its chemical composition and ability to record events as a geochronometer. It is highly resistant to weathering, which enables it to be transported from source to sink in a sedimentary system.
Sarah O'Leary, Richard Ketcham, Mauricio Ibanez-Mejia, Matthew A. Malkowski, Jacqueline Epperson   +4 more
openaire   +2 more sources

U‐Pb Detrital Zircon Analysis – Results of an Inter‐laboratory Comparison

Geostandards and Geoanalytical Research, 2013
Inter‐laboratory comparison of laser ablationICP‐MSandSIMSU‐Pb dating of synthetic detrital zircon samples provides an insight into the state‐of‐the art of sedimentary provenance studies. Here, we report results obtained from ten laboratories that routinely perform this type of work.
J. Kosler, J. Slama, E. Belusova, F. Corfu, G. Gehrels, A. Gerdes, M. Horstwood, K. Sircombe, P. Sylvester, M. Tiepolo, M. Whitehouse, J. Woodhead   +11 more
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DETRITAL ZIRCONS: INTERPRETING AGES THAT ARE MISSING

Geological Society of America Abstracts with Programs, 2019
R.P. Wintsch, John N. Aleinikoff, Ryan J. McAleer, Greg J. Walsh   +3 more
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Detrital zircon geochronology of a fossiliferous Miocene paleochannel

ABSTRACT A plethora of fauna and flora of uncertain age was recently discovered in fluvial sedimentary rocks of the Mokelumne River drainage of the western Sierra Nevada foothills (California, USA). These fossils are preserved in the Mokelumne paleochannel and show great biodiversity containing mastodon, gomphothere, camel, rhino, horse,
Montana Hodges*, Tahlor Newby, Holli Swarner, Cathy Busby, Russell Shapiro, Greg Francek, Christopher Hodges   +6 more
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