Results 171 to 180 of about 4,931 (238)

Towards Detrital Hematite U-Pb geochronology

Geological Society of America Abstracts with Programs
Anthony Fuentes, Liam Courtney-Davies, Rebecca Flowers, Penny Wieser, Matthew Gleeson, Yiming Zhang, Nicholas Swanson-Hysell   +6 more
openaire   +2 more sources

U–Pb geochronology of speleothems by MC-ICPMS

Quaternary Geochronology, 2006
Abstract Building upon the work of Richards et al. [1998. U–Pb dating of a speleothem of Quaternary age. Geochimica et Cosmochimica Acta 62, 3683–3688], we have developed a method for precise dating of speleothems beyond the range of the U–Th technique using the U–Pb decay scheme.
WOODHEAD J, HELLSTROM J, MAAS R, DRYSDALE R, ZANCHETTA, GIOVANNI, DEVINE P, TAYLOR E.   +6 more
openaire   +2 more sources

Synthesis and purification of 205Pb for UPb geochronology

Chemical Geology: Isotope Geoscience section, 1987
Abstract 205Pb is a synthetic isotope of great utility in UPb geochronology, but it has never been widely available in a purified, useable form. We have successfully completed two production runs with a total yield of ∼100μg 205Pb. The isotope was produced by 24–27-MeV proton irradiation using cyclotron facilities of Atomic Energy of Canada Limited
Randall R. Parrish, Tom E. Krogh
openaire   +1 more source

UPb geochronology of the Sri Lankan basement

Precambrian Research, 1994
Abstract UPb ages of zircons and monazites from ortho- and paragneisses representing the major crystalline basement units of Sri Lanka establish a new geochronological framework, which is consistent with previously published work on SmNd model ages, RbSr whole-rock ages, and UPb mineral ages.
S. Hölzl, A.W. Hofmann, W. Todt, H. Köhler   +3 more
openaire   +1 more source

Jilin zircon – a new natural reference material for microbeam U–Pb geochronology and Hf–O isotopic analysis

Journal of Analytical Atomic Spectrometry, 2021
This study presented a new natural zircon reference material for microbeam U–Pb geochronology and Hf–O isotopic analysis.
Tao Luo, Qiu-li Li, Xiaoxiao Ling, Yang Li, Chuan Yang, Hanlin Wang, X. Xia, Shao‐Bing Zhang, Lei Xu, Xiaoming Liu, Xiao-Dong Deng, Zhaochu Hu   +11 more
semanticscholar   +1 more source

Rapid U‐Pb Geochronology by Laser Ablation Multi‐Collector ICP‐MS

Geostandards and Geoanalytical Research, 2020
Detrital zircon (DZ) U‐Pb laser ablation‐inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS) has revolutionised the way geologists approach many Earth science questions.
K. Sundell, G. Gehrels, M. Pecha
semanticscholar   +1 more source

Bastnaesite: a promising U-Pb geochronological tool

Doklady Earth Sciences, 2010
One of the most complex problems in geochrono logical studies is dating endogenous ore processes. The application of the U–Pb method in solving this prob lem is constrained by the sufficiently narrow range of traditional mineral geochronometers, which, if present in ores, are strongly altered.
E. B. Sal’nikova, S. Z. Yakovleva, A. V. Nikiforov, A. B. Kotov, V. V. Yarmolyuk, I. V. Anisimova, A. M. Sugorakova, Yu. V. Plotkina   +7 more
openaire   +1 more source

LA-ICP-MS U-Pb geochronology and clumped isotope constraints on the formation and evolution of an ancient dolomite reservoir: The Middle Permian of northwest Sichuan Basin (SW China)

, 2020
Recent advances in laser-ablation inductively coupled-plasma mass spectrometry (LA-ICP-MS) in-situ U-Pb radiometric dating and clumped isotope thermometry (Δ47) of carbonate minerals provide potential for refining the fluid flow and diagenetic history of
L. Pan, Anjiang Shen, Jian-xin Zhao, Hu Anping, Yi Hao, Feng Liang, Yue‐xing Feng, Xiaofang Wang, Lei Jiang   +8 more
semanticscholar   +1 more source

Zircon U–Pb geochronology of paragneisses and biotite

2011
Sensitive high-resolution ion microprobe U–Th–Pb age determinations on detrital and inherited zircon from the E ´ vora Massif (SW Iberian Massif, Portugal) provide direct evidence for the provenance of the Ossa–Morena Ediacaran basins (Se´rie Negra) and a palaeogeographical link with the West African craton.
Pereira, M. Francisco, Chichorro, Martim, Williams, Ian S., Silva, Jose B.   +3 more
openaire   +2 more sources

U-Pb geochronology of exposed basement rocks in Oklahoma

Geological Society of America Bulletin, 1979
U-Pb measurements on zircons separated from Precambrian basement rocks from Oklahoma yield the following: (1) the Spavinaw Granite, which appears in outcrops in Mayes County, northeastern Oklahoma, is 1,370 ± 20 m.y. old; (2) the ages of rocks exposed in the eastern Arbuckle Mountains in southeastern Oklahoma are: Tishomingo Granite, 1,374 ± 15 m.y ...
M. E. BICKFORD, RICHARD D. LEWIS
openaire   +1 more source