This data article provides zircon U-Pb and Lu-Hf isotopic information along with whole-rock Sm-Nd, Sr and Pb isotopic geochemistry from granitoids in Thailand. The U-Pb ages are described and the classification of crystallisation and inherited ages are explained. The petrography of the granitoid samples is detailed. The data presented in this article are interpreted and discussed in the research article entitled "Probing into Thailand's basement: New insights from U-Pb geochronology, Sr, Sm-Nd, Pb and Lu-Hf isotopic systems from granitoids" (Dew et al., 2018).
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http://dx.doi.org/10.1016/j.dib.2018.10.176 | DOI Listing |
J Mass Spectrom
January 2025
National Geochronology Facility, Inter-University Accelerator Centre (IUAC), New Delhi, India.
A large geometry high resolution secondary ion mass spectrometer (HR-SIMS) has been established as a part of the National Geochronology Facility (NGF) at Inter-University Accelerator Centre (IUAC), New Delhi. The performance of the instrument related to high spatial resolution, high mass resolving power (MRP), sensitivity of the instrument to measure low abundant isotopes, and sensitivity of the instrument for Pb signal under different conditions are optimized and presented in this paper. We report the precision of the order of ~ 0.
View Article and Find Full Text PDFData Brief
December 2024
IDL - Instituto Dom Luiz, Faculdade de Ciências da Universidade de Lisboa, Ed. C1, Campo Grande, 1749-016, Lisboa, Portugal.
Comprehensive isotopic databases of a particular geotectonic domain are valuable resources for geoscientists to develop geological models, such as paleogeographic and tectono-magmatic evolution models. The UPbGeoChronSPZ2024 is an open-access dataset of U-Pb isotopic analyses in minerals, primarily zircon, from igneous and siliciclastic rocks of the South Portuguese Zone, a Laurussian affinity terrain hosting a world-class metallogenic region, the Iberian Pyrite Belt. The dataset includes isotopic measurements and the location of the samples in WGS84 coordinates and it can be easily coupled with other regional or global datasets, making its value beyond its regional character.
View Article and Find Full Text PDFNatl Sci Rev
December 2024
College of Earth and Planetary Science, Chengdu University of Technology, Chengdu 610059, China.
Paleogeographic reconstructions are of key importance for understanding the history of continental breakups and amalgamations during Earth's history. A special case is the history of the Asian continent, which, compared to other continents, consists of several large cratons and numerous smaller continental blocks. The history of the assembly of South China remains controversial in terms of the timing, Late Neoproterozoic or Early Paleozoic, and the participating continental blocks, e.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
November 2024
Department of Earth and Planetary Science, University of California-Berkeley, Berkeley, CA 94720.
The Snowball Earth hypothesis predicts global ice cover; however, previous descriptions of Cryogenian (720-635 Ma) glacial deposits are limited to continental margins and shallow marine basins. The Tavakaiv (Tava) sandstone injectites and ridges in Colorado, USA, preserve a rare terrestrial record of Cryogenian low-latitude glaciation. Injectites, ridges, and chemically weathered crystalline rock display features characteristic of fluidization and pervasive deformation in a subglacial environment due to glacial loading, fluid overpressure, and repeated sand injection during meltwater events.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
November 2024
Department of Geosciences, Princeton University, Princeton, NJ 08544.
Northeast China's Early Cretaceous Yixian Formation preserves spectacular fossils that have proved extraordinarily important in testing evolutionary hypotheses involving the origin of birds and the distribution of feathers among nonavian dinosaurs. These fossils occur either flattened with soft tissue preservation (including feathers and color) in laminated lacustrine strata or as three-dimensional (3D) skeletons in "life-like" postures in more massive deposits. The relationships of these deposits to each other, their absolute ages, and the origin of the extraordinary fossil preservation have been vigorously debated for nearly a half century, with the prevailing view being that preservation was linked to violent volcanic eruptions or lahars, similar to processes that preserved human remains at Pompeii.
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