Results 171 to 180 of about 60,061 (215)

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.
Massimo Tiepolo, Jiri Slama, Jon Woodhead   +2 more
exaly   +3 more sources

Detrital zircon evidence for the antiquity of Taiwan

Geosciences Journal, 2009
In-situ U-Pb geochronology and Hf isotopic studies of zircons from the Pre-Tertiary basement complex and Eocene rocks of the Central Range of Taiwan were carried out to elucidate the history of detrital zircons older than 2.3 Ga. Zircons from the eastern Backbone Range and Eastern Central Range show Paleoproterozoic to late Neoarchean ages (2.3−≥2.5 Ga)
Ching-Ying Lan, Tadashi Usuki, Kuo-Lung Wang, Tzen-Fu Yui, Kazuaki Okamoto, Yuan-Hsi Lee, Takafumi Hirata, Yoshitaka Kon, Yuji Orihashi, Juhn G. Liou, Chun-Sun Lee   +10 more
openaire   +1 more source

DETRITAL ZIRCON POPULATIONS OF THE EASTERN LAURENTIAN MARGIN IN THE APPALACHIANS

Geological Society of America Abstracts with Programs, 2020
Abstract Newly compiled U-Pb detrital zircon data from eight geographic domains along the eastern Laurentian margin from Newfoundland (Canada) to Alabama (United States) show a highly consistent signature along strike, with only minor local variations. The Precambrian signature is characterized by a small ca.
Yvette D. Kuiper, J. Christopher Hepburn
openaire   +1 more source

The European continental crust through detrital zircons from modern rivers: biasing effects in the detrital zircon record

2021
We present U-Pb, Lu-Hf, and O isotopic data, as well as size-shape data for approximately 3700 detrital zircons from 15 European rivers. In combination with geomorphological information for each river basin (area, drainage length, and hypsometric curves), we evaluate the representativeness and biases affecting such datasets.
Castillo , Paula , Bahlburg , Heinrich , Fernández , Rodrigo , Fanning , Mark , Berndt , Jasper   +4 more
openaire   +1 more source

Detrital Zircon Analysis of the Sedimentary Record

Reviews in Mineralogy and Geochemistry, 2003
The composition of “heavy,” or accessory, detrital minerals in sediments and sedimentary rocks has been a topic of quantitative study for at least the last seventy years, beginning with the first issue of the Journal of Sedimentary Petrology in May 1931 (Tyler 1931, Pentland 1931).
openaire   +1 more source

Metamorphic zircon: tracking fluid pathways and the implications for the preservation of detrital zircon

Journal of the Geological Society, 2013
Zircon in greenschist-facies Dalradian metasedimentary rocks of Scotland is characterized by two types: large detrital grains and small euhedral metamorphic grains. The former are concentrated in psammites and contain abundant evidence of dissolution and reaction with metamorphic fluids. The smallest metamorphic microzircons (<9 µm
Tim Dempster, Peter Chung
openaire   +1 more source

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
openaire   +3 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source