نتایج جستجو برای: geochronology

تعداد نتایج: 1891  

Journal: :Comptes Rendus Geoscience 2023

Based on a review of literature and few case studies, this paper summarizes the state art dating folds thrusts, then presents discusses how recent advances in K–Ar illite U–Pb calcite geochronology applied to brittle structures fold-and-thrust belts have helped better constrain timing, sequence, duration rates deformation.

Journal: :Geochemistry Geophysics Geosystems 2023

Glauconite is an authigenic clay mineral that common in marine sedimentary successions. Dating of glauconite to determine the depositional age sequences has a long history but fallen into disfavor due difficulty obtaining “pure” separates. Recent advances petrography and reaction cell mass spectrometry permit rapid situ Rb-Sr dating carefully screened grains. However, remains susceptible burial...

Journal: :International Geology Review 2022

Sandstone petrography, zircon and apatite U-Pb geochronology, geochemistry of Early Cretaceous siliciclastic turbidites interbedded with basalt (Chivillas Formation) in the southern Sierra Madre Oriental, Mexico, indicate local provenance from westerly basement sources. Three main detrital populations were observed both geochronology: Meso–Neoproterozoic, Carboniferous–Permian, Cretaceous. Apat...

Journal: :Minerals 2022

The Ailaoshan orogenic belt, located in the SE margin of Qinghai–Tibet Plateau, is an important Paleo-Tethys suture zone eastern Sanjiang Tethys tectonic domain. areas Mojiang and Zhenyuan, middle part are key parts Ocean closure collision orogeny. rhyolites outcropped area, granite porphyries Zhenyuan systematically studied for petrology, isotope geochemistry geochronology. Zircon U-Pb geochro...

Journal: :Geochemistry Geophysics Geosystems 2021

Detrital geochronology provides insight into a broad range of Earth Science questions. However, detrital zircon U-Pb age distributions are inherently univariate, and thus quantitative comparison methods limited to one-dimension (1D) subject nonunique results due overlapping groups. We developed two-dimensional (2D) measures for bivariate kernel density estimates (KDEs) cumulative distribution f...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید