Conodont color alteration; an index to organic metamorphism [PDF]
, 1977 Field and laboratory experiments show that color alteration in conodonts is directly related to the depth and duration of burial and the geothermal gradient and correlates with fixed carbon, vitrinite reflectance, palynomorph translucency, and isopach ...
Anita G. Epstein +2 more
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Известия Томского политехнического университета: Инжиниринг георесурсов, 2023 The relevance of the study is caused by the study and involvement of quartz-vein formations of various genetic types in the technological redistribution.
Maria A. Korekina, Alexander N. Savichev
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Effects of using different levels of animal and plant proteins in the diets of frog larvae (Rana ridibunda) during metamorphism (tadpole to froglet [PDF]
تغذیه آبزیان, 2021 Considering the global consumption of frogs and providing 95% of frogs' legs at the international level through fishing from the natural environment, environmental concerns have been given more attention.
Gholamreza Rafiee +2 more
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Fluid-induced metamorphism and anatexis of refractory Ni-Co-Cu sulphides in subduction-related rocks [PDF]
E3S Web of Conferences, 2019 The role of metamorphism on refractory sulfides is not well constrained. Although experiments have displayed the effectiveness of high grade metamorphism, namely granulite facies metamorphism, on sulfide anatexis, its role in the presence of other ...
Kepezhinskas Nikita
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Geosphere, 2021 Crustal metamorphism under extreme pressure-temperature conditions produces characteristic ultrahigh-pressure (UHP) and ultrahigh-temperature (UHT) mineral assemblages at convergent plate boundaries.
Yong‐Fei Zheng, Ren‐Xu Chen
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Reconstructing Nitrogen Sources to Earth’s Earliest Biosphere at 3.7 Ga
Frontiers in Earth Science, 2021 Earth’s sedimentary record has preserved evidence of life in rocks of low metamorphic grade back to about 3.2–3.5 billion years ago (Ga). These lines of evidence include information about specific biological metabolisms, permitting the reconstruction of ...
Eva E. Stüeken +5 more
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U-Th-Pb zircon geochronology on igneous rocks in the Toija and Salittu Formations, Orijärvi area, southwestern Finland: Constraints on the age of volcanism and metamorphism [PDF]
Bulletin of the Geological Society of Finland, 2008 Zircons from a felsic volcanic rock in the Toija Formation and a synvolcanic gabbro intrusion in the Salittu Formation within the Orijärvi area were dated by U-Th-Pb SIMS in order to provide depositional constraints on these formations.
M. Väisänen, C.L. Kirkland
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Svecofennian intra-orogenic gabbroic magmatism: A case study from Turku, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 2014 Using single-grain zircon U-Pb dating by LA-MC-ICPMS and whole-rock geochemistry, we have studied the Palaeoproterozoic gabbroic rocks from Moisio in southwest Finland. Three ages were obtained.
J. Nevalainen +4 more
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REE MINERALS IN BLACK SHALES OF THE PALEOPROTEROZOIC MIKHAILOVKA FORMATION (BAIKAL-PATOM HIGHLAND, SIBERIA) [PDF]
Минералогия, 2022 The paper characterizes REE mineralization from carbonaceous metapelites of the Paleoproterozoic Mikhailovka Formation, which is the most ancient gold-bearing horizon of the Lena province (Bodaibo district, Irkutsk region). The conditions of metamorphism
E.E. Palenova +3 more
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Геодинамика и тектонофизика, 2020 The Archean metamorphism in the southwestern Siberian craton was confirmed by the studies of the Kitoy and Irkutsk blocks. However, the parameters of the metamorphism process are still poorly investigated.
V. P. Sukhorukov, V. B. Savel'eva
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