Zobrazeno 1 - 10
of 44 528
pro vyhledávání: '"u/pb"'
Publikováno v:
Progress in Earth and Planetary Science, Vol 11, Iss 1, Pp 1-26 (2024)
Abstract The most common age constraint for the diatomaceous sediments is biostratigraphy of siliceous microfossils. Although biostratigraphy is a powerful tool to establish stratigraphy and correlate with sedimentary sequences in other sites, biostr
Externí odkaz:
https://doaj.org/article/2b7690425bb94360aa1e9c4dff242c75
Autor:
Sergey G. Skublov, Ekaterina V. Levashova, Maria E. Mamykina, Nikolay I. Gusev, Anatoliy I. Gusev
Publikováno v:
Записки Горного института, Vol 268, Pp 552-575 (2024)
Based on the isotopic-geochemical analyses of zircons from granites of the Belokurikhinsky massif in the Gorny Altai using the U-Pb method, the ages of three intrusion phases have been determined for the first time: the age of the first phase refers
Externí odkaz:
https://doaj.org/article/22fd1ea2f21f4d58b9a48d64459314e8
Publikováno v:
Swiss Journal of Geosciences, Vol 117, Iss 1, Pp 1-25 (2024)
Abstract The Troiseck-Floning and Rosskogel nappes are part of the Austroalpine Unit in the eastern part of the Eastern Alps. The nappes are in tectonic contact and comprise Permian to Mesozoic lower greenschist facies metamorphic metasediments, but
Externí odkaz:
https://doaj.org/article/f5541a339eac4ce98867168f10e7cdb5
Autor:
Junlin CHEN, Yahao HUANG, Xiaowen GUO, Tao LUO, Yanlei WANG, Xuyou ZHANG, Zhiqi HU, Hongman JIANG, Yang WANG
Publikováno v:
地质科技通报, Vol 43, Iss 3, Pp 157-169 (2024)
Objective Calcite veins are the products of tectonic diagenesis. Information about fracture opening and fluid activity was recorded by calcite veins. Methods Multiple approaches, consisting of thin section observation, cathodoluminescence, U-Pb isoto
Externí odkaz:
https://doaj.org/article/3e6d8463ceab47ce8b675d2114791c90
Publikováno v:
Bulletin of the Geological Society of Finland, Vol 96, Iss 1, Pp 59-80 (2024)
Four quartz monzonite – granite intrusions forming the Sorsakoski granite lithodeme, are found within the Raahe-Ladoga suture zone in Central Finland. The prevailing potassium feldspar megacrystic quartz monzonites and granites form a bimodal assoc
Externí odkaz:
https://doaj.org/article/d92bf110ef59456ab3ef8d1a3db5db3d
Autor:
Keewook Yi, Yuri Amelin
Publikováno v:
Journal of Analytical Science and Technology, Vol 15, Iss 1, Pp 1-12 (2024)
Abstract We report developing a procedure for measuring concentrations of U, Th and Pb (including all natural Pb isotopes) to establish the distribution of these elements in meteorite minerals and correctly interpret Pb-isotopic ages of meteorites. T
Externí odkaz:
https://doaj.org/article/2c82904718aa47288210c92549cd7e0a
Publikováno v:
The Depositional Record, Vol 10, Iss 2, Pp 312-334 (2024)
Abstract Thin tuff beds of the Late Jurassic–Early Cretaceous Bazhenovo Formation are laterally widespread in the central part of the West Siberian Basin (ca 0.5 million km2). However, the source of the tuff beds remains unclear. The stratigraphy,
Externí odkaz:
https://doaj.org/article/521f0248b9e94cf9a6c22a8f80c5c9ce
Publikováno v:
Swiss Journal of Geosciences, Vol 117, Iss 1, Pp 1-33 (2024)
Abstract High-pressure and ultra-high-pressure metamorphic terrains display an internal architecture consisting of a pile (or stack) of several coherent tectonic thrust sheets or units. Their identification is fundamental for understanding the scale
Externí odkaz:
https://doaj.org/article/252f28799c08491cb5da52e490b5302a
Publikováno v:
Natural Gas Industry B, Vol 11, Iss 2, Pp 227-238 (2024)
Geothermal energy is a clean, abundant, and dependable energy source. Because the formation of a geothermal field is often closely linked to the distribution and development of granite, it is crucial to understand the regularity and formation mechani
Externí odkaz:
https://doaj.org/article/98084493cdf14842a98cefd355c4931e
Publikováno v:
Geoscience Data Journal, Vol 11, Iss 2, Pp 118-127 (2024)
Abstract With the development of detrital zircon U–Pb ages and Hf isotope analysis as conventional sedimentological research methods, a large number of studies have been conducted in the Tarim, West Kunlun, Tajik, Pamir and Tianshuihai regions and
Externí odkaz:
https://doaj.org/article/5b4364909b784580b6ce7a1fe63dbff0