Results 11 to 20 of about 381 (215)
China Geology, 2018 : The Xisha Block is a minor one in the South China Sea and an important tectonic unit in the northwestern part of the region. Zircon SHRIMP U-Pb ages for three volcanic intrusive core samples from Xike-1, an exploratory well penetrating the bioherms of ...
Hong Xu +12 more
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Geologia USP. Série Científica, 2018 O Granito Aragão, localizado na Província Aurífera Alta Floresta (PAAF), consiste de um stock granítico de ~ 80 km2, de granulação média a grossa, textura porfirítica e composição modal monzogranítica a sienogranítica.
Samantha Evelyn Max Dezula +4 more
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SHRIMP Zircon U-Pb Dating of Mid-Pleistocene Dacite and Discussion of Relative Problems
Yankuang ceshi, 2015 K-Ar and U series disequilibria methods have been applied to geochronology research of young volcanic rocks in Tengchong, China. Previous K-Ar dating methods yielded ages of 0.013 to 17.84 Ma and isochron ages of 0.13 to 2.9 Ma in this area. The U series
LI Lin-lin, WANG Shu-bing, SHI Yu-ruo
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Geologia USP. Série Científica, 2016 Inúmeros cristais de titanita foram coletados na mina de cobre Khan, Namíbia, África. Eles foram analisados através da técnica de microssonda iônica de alta resolução e de alta sensibilidade (SHRIMP) no Laboratório de Geocronologia de Alta Resolução ...
Kei Sato Sato +4 more
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First U–Pb SHRIMP age of the Hauterivian stage, Neuquén Basin, Argentina
Journal of South American Earth Sciences, 2008 Fil: Aguirre Urreta, Maria Beatriz. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales.
Aguirre-Urreta, M. Beatriz +4 more
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, 2022 Abstract. Estimations of the reproducibility of U-Pb ages from SHRIMP instruments are based on data from studies nearly two decades old. Since that time, refinement of analytical procedures and manufacturing and installation improvements may have reduced the fundamental uncertainties of SHRIMP U-Pb analysis.
Charles Magee Jr. +5 more
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SHRIMP U-Pb Zircon Ages of the Metapsammite in the Yeongam-Gangjin Area
Economic and Environmental Geology, 2015 The metapsammite distributed in the Yeongam-Gangjin area had been classified into age-unknown Yongamsan Formation, Seologri Formation and age-unknown Seogisan Formation, and these formations are reported as each other different formations. These formations have been renamed Precambrian Galdu or Permian Songjong Formations.
Dong-Yeon Kim, Sung-Ja Choi, Keewook Yi
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Journal of Palaeogeography, 2018 The first SHRIMP zircon U–Pb ages from coal beds close to the end-Permian mass extinction are reported from the C1 coal seam in the Yantang Mine in Laibin Town, Xuanwei County, eastern Yunnan Province.
Juan Wang +4 more
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SHRIMP U-Pb zircon dating on Nyainqentanglha granite in central Lhasa block
Chinese Science Bulletin, 2004 The Nyainqentanglha granite, a batholith with an area of 1500 km2 in the central Lhasa block, comprises mainly medium-fine-grained biotite monzonitic granite and medium-coarse-grained biotite monzonitic granite. Their contact relationship suggests that the medium-fine-grained biotite monzonitic granite was crystallized earlier than the medium-coarse ...
Qisheng Liu +6 more
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Brazilian Journal of Geology, 2018 : New age determinations by Ar-Ar and U-Pb SHRIMP for the alkaline complexes of Banhadão and Itapirapuã that occur in the Ribeira Valley are in agreement with the previously radiometric K-Ar ages available in literature.
Celso de Barros Gomes +5 more
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