Results 31 to 40 of about 1,644,051 (117)

U-Pb (LA-ICP-MS) age of detrital zircons and the sources of terrigenous sediments of the Ipsit suite, Karagass series (Sayan segment of the Sayan-Baikal-Patom belt)

open access: yesГеодинамика и тектонофизика, 2018
The petrographic, lithogeochemical and U-Pb (LA-ICP-MS) geochronological studies were carried out to investigate the terrigenous rocks sampled from the lower part of the Ipsit suite of the Karagass series (Sayan segment of the Sayan-Baikal-Patom belt ...
Z. L. Motova   +3 more
doaj   +1 more source

Dedicated to eternity? The reuse of statue bases in late antique Italy [PDF]

open access: yes, 2018
This chapter analyses the evidence for the reuse of inscribed statue bases from late antique Italy, arguing that rather than an occasional behaviour, this was an officially accepted practice.
Ribeiro Machado, Carlos Augusto
core   +2 more sources

The crustal structure of Onega-Kandalaksha paleorift identified by complex analysis of the anomalous magnetic field of the White Sea

open access: yesГеодинамика и тектонофизика, 2018
Geological and geophysical studies recently conducted in the White Sea and the adjacent territory have provided new data on the deep structure of this region.
A. S. Baluev   +2 more
doaj   +1 more source

Iso-Naakkima, a circular structure filled with Neoproterozoic sediments, Pieksämäki, southeastern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1993
A circular Bouguer gravity anomaly with a minimum of -4.0 mGal and half amplitude width of 2 km was recognized at Lake Iso-Naakkima (62°11'N, 27°09'E), southeastern Finland.
S. Elo   +4 more
doaj   +1 more source

Deep Structure, Tectonics and Petroleum Potential of the Western Sector of the Russian Arctic

open access: yesJournal of Marine Science and Engineering, 2021
The evolutionary-genetic method, whereby modern sedimentary basins are interpreted as end-products of a long geological evolution of a system of conjugate palaeo-basins, enables the assessment of the petroleum potential of the Western sector of the ...
Alexey S. Egorov   +4 more
doaj   +1 more source

The Decline and Fall of the Mithraea of Rome [PDF]

open access: yes, 2016
The end of paganism has traditionally been explained as a result of the rise of Christianity. In recent scholarship, the romantic image of an epic battle between pagans and Christians in Late Antiquity has been significantly altered and corrected ...
Schuddeboom, F.L.   +3 more
core   +2 more sources

Variations of Th/U values in Vendian clayey rocks of north-east East-European Platform and Middle and Southern Urals as reflection redox status of sedimentary basins

open access: yesЛитосфера, 2017
Earlier, we considered the features of the redox changes in the near-bottom layer of water in the sedimentation basins that existed during the Late Riphean and Vendian in the eastern and northeastern (in modern coordinates) margins of the Baltic.
Andrey V. Maslov, Viktor N. Podkovyrov
doaj   +1 more source

Linking Tectonics and Cratonic Vertical Motions: Deep‐Time Thermochronology Reveals >1,000 Myr of Low‐Temperature Conditions in Southeastern Finland

open access: yesTectonics, Volume 45, Issue 9, September 2026.
Abstract The Fennoscandian Shield potentially hosts the longest continuous habitable conditions for Earth's deep biosphere. Billion‐year equilibrium freeboard conditions of cratons and the longevity of deep biosphere microbial communities are directly related through the thermal histories of rocks that host these communities.
Josh Isaacs   +4 more
wiley   +1 more source

First High‐Precision U–Pb CA–ID–TIMS Age of the Chuanlinggou Formation, North China Craton: Implications for Global Correlations of Black Shales and the Statherian/Calymmian Boundary

open access: yesGeophysical Research Letters, Volume 51, Issue 18, 28 September 2024.
Abstract The Chuanlinggou Formation in the northern North China preserves the world's earliest multicellular eukaryote microfossils. Here we present a high‐precision zircon U–Pb CA–ID–TIMS age of 1,641.7 ± 1.2 Ma for a tuff layer within the black shales of the Chuanlinggou Formation.
Shuan‐Hong Zhang   +6 more
wiley   +1 more source

Late-orogenic gold deposits of Egypt

open access: yesГорные науки и технологии, 2018
Egypt belongs to states developing its mineral resource base. Gold-bearing territory of Egypt is located within the Nubian-Arabian shield in the Neoproterozoic collision zone of transverse thrusts.
Hani Sharafeldin Elsayed
doaj   +1 more source

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