Results 31 to 40 of about 661,854 (360)
Neoproterozoic subduction along the Ailaoshan zone, South China : geochronological and geochemical evidence from amphibolite [PDF]
, 2014 This study was supported by China Natural Science Foundation (41190073 and 41372198), National Basic Research Program of China (2014CB440901) and Natural Environment Research Council (grant NE/J021822/1).Lenses of amphibolites occur along the Ailaoshan ...
Cai, Yongfeng +6 more
core +1 more source
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 +5 more
openaire +5 more sources
Geologica Carpathica, 2016 On the southeastern slope of the Baranec Mount in the Western Tatra Mountains (Slovakia) an apatite-rich pegmatite-like segregation was found in the subvertical fault zone cutting metapelitic rocks.
Gawęda Aleksandra +6 more
doaj +1 more source
Extent of the Ross Orogen in Antarctica: new data from DSDP 270 and Iselin Bank [PDF]
, 2011 The Ross Sea is bordered by the Late Precambrian–Cambrian Ross–Delamerian Orogen of East Antarctica and the more Pacific-ward Ordovician–Silurian Lachlan–Tuhua–Robertson Bay–Swanson Orogen.
Bradshaw +12 more
core +1 more source
Crustal evolution of the western part of the Archean Gavião Block, São Francisco Craton, based on U-Pb, Sm-Nd and Rb-Sr evidence [PDF]
Geologia USP. Série Científica, 2013 The western part of the Gavião Block (São Francisco Craton) is one of the oldest fragments of the South American Platform. It comprises the Riacho de Santana Gneissic Migmatitic complex, the Santa Isabel complex and the Riacho de Santana greenstone belt.
Natali da Silva Barbosa +3 more
doaj +1 more source
In situ U-Pb Dating of Calcite from the South China Antimony Metallogenic Belt
iScience, 2020 Summary: Accurately determining the age of hydrothermal ore deposits is difficult, because of lack of suitable mineral chronometers and techniques. Here we present the first LA-MC-ICPMS U-Pb age of carbonates from hydrothermal Sb deposits.
Kai Luo +6 more
doaj +1 more source
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 +128 more
core +2 more sources
Geochimica et Cosmochimica Acta, 2008 Abstract Precise U–Pb ages, determined with double spike ( 202 Pb– 205 Pb) thermal ionization m1ass spectrometry, are reported for angrites Angra dos Reis (AdoR), Lewis Cliff 86010 (LEW), and D’Orbigny. Nineteen of 23 acid-washed pyroxene fractions from these meteorites and whole rock fractions from D’Orbigny contain between 0.5 and 1.3 pg of total ...
openaire +2 more sources
Spatial and glacial‐interglacial variations in provenance of the Chinese Loess Plateau
Geophysical Research Letters, 2012 The Chinese Loess Plateau (CLP) covers an extensive area over 440,000 km2and provides an unprecedented terrestrial record of Neogene climate. However, it is still unclear whether the provenance of these loess deposits is uniform or contains spatial and ...
Guoqiao Xiao +6 more
doaj +1 more source
China Geology, 2019 : The Wujiatai Formation, which is well exposed in Huangjiatai-Xichahe region of the northern Kongling area of central Yangtze Craton, is a suite of epimetamorphic conglomerates to pebbly sandstones to fine sandstone-dolostones deposited in littoral ...
Xiao-ming Zhao +6 more
doaj +1 more source