Results 21 to 30 of about 156,667 (215)

In situ LA-ICPMS U–Pb dating of sulfates: applicability of carbonate reference materials as matrix-matched standards [PDF]

Geochronology, 2022
Recent developments in analytical capabilities in the field of in situ laser ablation mass spectrometry (LA-ICPMS) have expanded the applications of U–Pb geochronometers in low-U minerals such as carbonates or garnets.
A. Beranoaguirre, A. Beranoaguirre, A. Beranoaguirre, A. Beranoaguirre, I. Vasiliev, A. Gerdes, A. Gerdes   +6 more
doaj   +1 more source

U‐Pb age of the Yxsjöberg Tungsten‐Skarn deposit, Sweden

GFF, 1994
Abstract The Yxsjoberg scheelite‐skam deposit of western Bergslagen (south‐central Sweden) formed in Palaeoproterozoic time when aqueous fluids migrating along lithologic discontinuities replaced limestones in acid volcanic rocks. The age of the mineralization and, thus, the source of the fluids are controversial.
Romer, R., Öhlander, B.
openaire   +4 more sources

U–Pb zircon ages from the Spontang Ophiolite, Ladakh Himalaya

Journal of the Geological Society, 2001
The Spontang Ophiolite in the Ladakh Himalaya consist of a thrust sheet of upper mantle and oceanic crustal rocks obducted onto the northern passive continental margin of India during the late Cretaceous. Precise isotopic ages of Himalayan ophiolites are presently unavailable. U–Pb dating of zircons from a dioritic segregation in the high-level gabbros
Pedersen, R, Searle, M, Corfield, R
openaire   +1 more source

Direct Calibration Method for LA-HR-ICP-MS Apatite U-Pb Dating

Yankuang ceshi, 2022
BACKGROUND Apatite is a common U-bearing accessory mineral with a U-Pb closure temperature of ~500℃, making U-Pb dating of apatite a potentially valuable thermochronometer.
ZHAO Linghao, ZHAN Xiuchun, ZENG Lingsen, HU Mingyue, SUN Dongyang, YUAN Jihai   +5 more
doaj   +1 more source

A Triassic to Cretaceous Sundaland–Pacific subduction margin in West Sarawak, Borneo [PDF]

, 2017
Metamorphic rocks in West Sarawak are poorly exposed and studied. They were previously assumed to be pre-Carboniferous basement but had never been dated. New 40Ar/39Ar ages from white mica in quartz-mica schists reveal metamorphism between c.
Boudagher-Fadel, M.K., Breitfeld, Hans, Forster, M.A., Galin, Thomson, Hall, Robert   +4 more
core   +2 more sources

The effect of low-temperature annealing on discordance of U–Pb zircon ages [PDF]

Scientific Reports, 2021
AbstractDiscordant U–Pb data of zircon are commonly attributed to Pb loss from domains with variable degree of radiation damage that resulted from α-decay of U and Th, which often complicates the correct age interpretation of the sample. Here we present U–Pb zircon data from 23 samples of ca.
Herrmann, Maria, Soderlund, Ulf, Schersten, Anders, Naeraa, Tomas, Holm-Alwmark, Sanna, Alwmark, Carl   +5 more
openaire   +5 more sources

High-Precision U-Pb Zircon Age Calibration of the Global Carboniferous Time Scale and Milankovitch Band Cyclicity in the Donets Basin, Eastern Ukraine [PDF]

, 2010
High-precision ID-TIMS U-Pb zircon ages for 12 interstratified tuffs and tonsteins are used to radiometrically calibrate the detailed lithostratigraphic, cyclostratigraphic, and biostratigraphic framework of the Carboniferous Donets Basin of eastern ...
Aisenverg, Aisenverg, Aisenverg, Aizenverg, Aizenverg, Alekseev, Algeo, Barrick, Barrick, Barskov, Belka, Birgenheier, Black, Boardman, Brazhnikova, Briand, Burger, Chekunov, Chernov'yants, Chernykh, Chernykh, Chesnut, Condon, Cozar, Davydov, Davydov, Davydov, Davydov, Davydov, Davydov, Davydov, Davydov, Davydov, Davydov, Devuyst, Devuyst, Dickinson, Ellison, Fisunenko, Fohrer, Gastaldo, Gerstenberger, Goreva, Grozdilova, Haq, Heckel, Heckel, Heckel, Heckel, Heckel, Heckel, Hess, Hess, Inosova, Isakova, Ivanova, Izart, Izart, Izart, Izart, Jaffey, James L. Crowley, Kabanov, Kagarmanov, Khodjanyazova, Kireeva, Klein, Klein, Kozitskaya, Krogh, Kuiper, Kulagina, Kullmann, Lebedev, Levenshtein, Lutugin, Makhlina, Mark D. Schmitz, Mattinson, Menning, Milanovsky, Min, Montanez, Mundil, Nemirovskaya, Nemirovskaya, Nemyrovska, Nemyrovska, Nikitin, Nikolaeva, Pazukhin, Poletaev, Poletaev, Poty, Poulsen, Putrja, Ramezani, Rasbury, Rauser-Chernousova, Rauser-Chernousova, Renne, Ritter, Ross, Rotai, Savchuk, Schellwien, Schmitz, Schmitz, Shchegolev, Shchegolev, Skompski, Somerville, Soreghan, Soreghan, Stovba, Stovba, Tschernyshev, Vdovenko, Vdovenko, Vdovenko, Villa, Villeneuve, Vladimir I. Davydov, Vladislav I. Poletaev, Wang, Wanless, Wardlaw, Zaritskiy, Zhemchuzhnikov   +128 more
core   +2 more sources

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

Evaluation of the decay constant of uranium 235 from lead isotope ratios [PDF]

, 1966
The decay constant of U^(235) has been evaluated from the radiogenic Pb^(207)/Pb^(206) ratios of several cogenetic fractions of zircon and uranothorite, analyzed by conventional mass spectrometric methods.
Banks, Philip O., Silver, Leon T.
core   +1 more source

Impacts of Common Lead on Apatite U-Pb Geochronology by LA-ICP-MS: Assessment and Correction Strategies

Yankuang ceshi
Apatite is a widespread U-bearing mineral in igneous, metamorphic, and sedimentary rocks. U-Pb geochronology of apatite can provide significant information for constraining magmatic evolution processes and tracing provenance.
Tao LUO, Hanlin WANG, Songbai ZHU, Liyuan QING, Zhaochu HU   +4 more
doaj   +1 more source