Results 1 to 10 of about 74,970 (357)

Examination of the accuracy of SHRIMP U–Pb geochronology based on samples dated by both SHRIMP and CA-TIMS [PDF]

Geochronology, 2023
Estimations of the reproducibility of U–Pb ages from SHRIMP (Sensitive High-Resolution Ion MicroProbe) instruments are based on data from studies that are nearly 2 decades old.
C. W. Magee Jr., S. Bodorkos, C. J. Lewis, J. L. Crowley, C. J. Wall, R. M. Friedman   +5 more
doaj   +4 more sources

U-Pb SHRIMP geochronology data from the eastern Central Kibalian Superterrane, Bomu-Kibalian Craton, northeastern DRC: Implications for the tectonic evolution of the Kilo Terrane [PDF]

Data in Brief, 2021
This brief presents new U-Pb SHRIMP (Sensitive High-Resolution Ion Microprobe) geochronology data on zircons and titanites dated from the gold-rich Kilo Terrane in the eastern Central Kibalian Superterrane, northeastern DRC. Out of 40 rock samples (Table
J.M. Kabete, N.J. McNaughton, A. Bashizi, B. Kiza   +3 more
doaj   +2 more sources

Datações U-Pb Convencional Versus SHRIMP do Maciço Estanífero Santa Bárbara, Suíte Granitos Últimos de Rondônia, Brasil [PDF]

Geologia USP. Série Científica, 2002
O Maciço Granítico Santa Bárbara é parte da Suíte Granitos Últimos de Rondônia (998 - 974 Ma), e integra a ProvínciaEstanífera de Rondônia (SW do Cráton Amazônico). Compreende três unidades de granitos altamente fracionados,metaluminosos a peraluminosos,
Irena Sparrenberger, Jorge Silva Bettencourt, Richard M. Tosdal, Joseph L. Wooden   +3 more
doaj   +5 more sources

Sensitive High Resolution Ion Microprobe (SHRIMP IIe/MC) of the Institute of Geosciences of the University of São Paulo, Brazil: analytical method and first results [PDF]

Geologia USP. Série Científica, 2014
This paper presents the characteristics of the high resolution secondary ion mass spectrometer coupled with an Ion Micro - probe (SHRIMP IIe/MC), installed at the Institute of Geosciences of the University of São Paulo (IGc-USP), as well as the ...
Kei Sato, Colombo Celso Gaeta Tassinari, Miguel Angelo Stipp Basei, Oswaldo Siga Júnior, Artur Takashi Onoe, Artur Takashi Onoe, Maurício Dias de Souza   +6 more
doaj   +1 more source

A idade e natureza da Fonte do Granito do Moinho, Faixa Ribeira, Sudeste do Estado de São Paulo [PDF]

Geologia USP. Série Científica, 2004
Este trabalho apresenta novos dados geocronológicos U-Pb SHRIMP em zircões e Sm-Nd em rocha total do Granito do Moinho, que ocorre nas imediações da cidade de Nazaré Paulista, Estado de São Paulo.
Colombo Celso Gaeta Tassinari, Marly Babinski, Allen P. Nutman   +2 more
doaj   +2 more sources

New U-Pb (SHRIMP) and first Hf isotope constraints on the Tonian (1000-920 Ma) Cariris Velhos event, Borborema Province, NE Brazil

, 2020
Orthogneisses associated with metavolcanosedimentary successions related to the 1000 – 920 Ma Cariris Velhos event occur mainly in a ca. 700 km-long sigmoidal-shaped belt that crosscuts the Transversal Zone of the Borborema Province and extends to the ...
F. Caxito, Lauro Santos, A. Uhlein, E. Dantas, A. Alkmim, C. Lana   +5 more
semanticscholar   +1 more source

The results of U-Pb SHRIMP-II dating of zircon from granitoids of Talitsky molybdenum-bearing massif (eastern slope of the Middle Urals)

Литосфера, 2017
Age position and geodynamic conditions of molybdenum metallization and productive granitoids of the Urals formation are very little studied now. This publication contains the results of isotopic dating of granites from Talitsa Cu-Mo-porphyry deposit ...
N. Smirnov Vladimir, S. Ivanov Kirill, P. Shokalsky Sergey, L. Ronkin Yury   +3 more
doaj   +1 more source

Dating multiply overprinted granites: The effect of protracted magmatism and fluid flow on dating systems (zircon U-Pb: SHRIMP/SIMS, LA-ICP-MS, CA-ID-TIMS; and Rb–Sr, Ar–Ar) – Granites from the Western Erzgebirge (Bohemian Massif, Germany)

Chemical Geology, 2019
The Variscan granites from the Western Erzgebirge were repeatedly dated by various methods, but no consensus has been reached about their exact intrusion ages.
M. Tichomirowa, A. Kässner, B. Sperner, M. Lapp, D. Leonhardt, U. Linnemann, C. Münker, M. Ovtcharova, J. Pfänder, U. Schaltegger, S. Sergeev, A. Quadt, M. Whitehouse   +12 more
semanticscholar   +1 more source

Geologia e petrologia do Granito São Vicente na região do Parque Estadual Águas Quentes, estado de Mato Grosso, Brasil

Geologia USP. Série Científica, 1917
A análise petrogenética das rochas hipabissais do Granito São Vicente na região do Parque Estadual Águas Quentes permitiu o reconhecimento e a caracterização de distintas fácies.
Giulia Guimarães Barbosa Trivelli, Ronaldo Pierosan, Amarildo Salina Ruiz   +2 more
doaj   +1 more source

U-Pb Isotopic Dating of Monazite in Granite from the Changjiang Uranium Orefield, Northern Guangdong Province and Its Geological Significance

Yankuang ceshi, 2022
BACKGROUND The Changjiang uranium ore field in the southern margin of the Zhuguangshan complex pluton is a typical granite-type uranium ore field in China. Zircon U-Pb dating has been used to date ore-bearing granites. However, due to the high content of
CHEN Yan, PAN Jia-yong, ZHONG Fu-jun, WAN Jian-jun, YAN Jie, LIU Wen-quan, LI Hai-dong   +6 more
doaj   +1 more source