Results 171 to 180 of about 7,236 (215)

Late Paleozoic Tectonic Analysis and Geochronology Study by Shrimp Zircon U-Pb Dating

Chemistry and Technology of Fuels and Oils, 2019
Sinkiang Hami Redstone Copper in China is a super-large volcanic hydrothermal deposit formed as a result of multi-stage secondary tectonic activity in the Hercynian period of tectonic movement. In this work, we have studied the effect of the geomechanical nature on the structure of faults stretched in different directions and have studied the age of ...
Dongyu Li, Zhengxi Yang, Kanghui Thong, Xianxing Wu, Xiaodong Chen   +4 more
openaire   +1 more source

The contribution of the sensitive high-resolution ion microprobe (SHRIMP) to lunar geochronology

Precambrian Research, 2010
Abstract The sensitive high-resolution ion microprobe (SHRIMP) developed at the Australian National University (ANU) was the first of the high-resolution ion microprobes. The impact of this instrument on geochronological research over the last twenty years has been immense.
Pidgeon, Robert, Nemchin, Alexander, Meyer, C.   +2 more
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SHRIMP U–Pb geochronology from Mount Kirkby, northern Prince Charles Mountains, East Antarctica

Antarctic Science, 2000
Sensitive High Resolution Ion MicroProbe (SHRIMP) U–Pb zircon dating of pegmatites from Mount Kirkby, northern Prince Charles Mountains, east Antarctica indicates felsic intrusive activity at 991 ± 22 Ma and 910 ± 18 Ma. Pegmatite emplacement occurred during prolonged high-grade early Neoproterozoic tectonism.
C.J. Carson, S.D. Boger, C.M. Fanning, C.J.L. Wilson, D.E. Thost   +4 more
openaire   +1 more source

SHRIMP U-Pb geochronology and metamorphic history of the Smallefjord sequence, NE Greenland Caledonides

Journal of the Geological Society, 1995
SHRIMP U-Pb zircon ages have been obtained for a sample of metasedimentary gneiss from the Smallefjord sequence in the NE Greenland Caledonides. Pre-1000 Ma zircons are interpreted as being detrital in origin; the source region contained late Archaean rocks (or younger sediments or inheritance-rich granites derived from them) and several ...
R. A. STRACHAN, A. P. NUTMAN, J. D. FRIDERICHSEN   +2 more
openaire   +1 more source

SHRIMPDB: a new geoanalytical database for U-Th-Pb geochronological data from SHRIMP measurements

Earth Science Informatics, 2018
This paper introduces a novel web-based database, SHRIMPDB, to support the efficient reutilization of U-Th-Pb geochronological data from sensitive high-resolution ion microprobe (SHRIMP) measurements. In order to provide complete data content that can be reutilized by Earth scientists, a new data model containing analytical data and relevant sample ...
Yutong He, Di Tian, Ranran Gao, Runlong Fan, Li Yao, Pengfei Chen   +5 more
openaire   +1 more source

SHRIMP U-Pb Geochronology of the Closepet Granite and Peninsular Gneiss, Karnataka, South India

Journal Geological Society of India, 1991
Abstract Zircons separated from a sample of Peninsular gneiss (82-KD 14) from Kabbaldurga quarry, and a homogeneous Closepet granite (KO84-13) from near Ramnagaram have been dated with the ion microprobe SHRIMP. The Peninsular gneiss sample, a metatexite, contains an arrested charnockite transition and constitutes an amphibolite ...
C. R. L. Friend, A. P. Nutman
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SHRIMP U–Pb geochronology of authigenic xenotime and its potential for dating sedimentary basins

Australian Journal of Earth Sciences, 2000
SHRIMP (Sensitive High‐Resolution Ion MicroProbe) analytical procedures have been developed to enable dating of the small, early diagenetic xenotime overgrowths that commonly occur on zircons in siliciclastic sedimentary rocks. The method will be particularly useful in Precambrian terranes, where diagenetic xenotime dating could play a role equivalent ...
I. R. Fletcher, B. Rasmussen, N. J. McNaughton   +2 more
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SHRIMP‐RG U‐Pb Zircon Geochronology of Mesoproterozoic Metamorphism and Plutonism in the Southwesternmost United States

The Journal of Geology, 2001
Mesoproterozoic intrusive and granulite-grade metamorphic rocks in southern California have been inferred to be exotic to North America on the basis of perceived chronologic incompatibility with autochthonous cratonal rocks. Ion microprobe geochronology indicates that zircons in granulite-grade gneisses, dated at 1.4 Ga using conventional methods, are ...
Barth, A.P., Wooden, J.L., Coleman, D.S.
openaire   +1 more source

SHRIMP U–Pb zircon geochronological evidence for Neoarchean basement in western Arnhem Land, northern Australia

Precambrian Research, 2009
The Pine Creek Orogen, located on the exposed northern periphery of the North Australian Craton, comprises a thick succession of variably metamorphosed Palaeoproterozoic siliciclastic and carbonate sedimentary and volcanic rocks, which were extensively intruded by mafic and granitic rocks.
Julie A. Hollis, Chris J. Carson, Linda M. Glass   +2 more
openaire   +1 more source

SHRIMP U/Pb Zircon Geochronology of Neoproterozoic Juvenile and Crustal-Reworked Terranes in Southernmost Brazil

International Geology Review, 1998
U/Pb zircon ages of six rock units from southernmost Brazil were obtained by means of SHRIMP II techniques. The studied rocks occur on either side of the Neoproterozoic contact between a juvenile accreted terrane (the Vila Nova Terrane) and a crustal-reworked belt (the Dom Feliciano Belt).
Jayme A. D. Leite, LéO A. Hartman, Neal J. Mcnaughton, Farid Chemale   +3 more
openaire   +1 more source