Results 11 to 20 of about 5,243 (171)

Geology and tectonic evolution of Kazakhstan Paleozoides

open access: yesЛитосфера, 2019
Research subject. In this paper, we set out to investigate main paleostructures in Kazakhstan. In particular, we attempt to clarify or revise their existing geodynamic structures and to show key stages in their development on the basis of new data on the
S. G. Samygin, T. N. Kheraskova
doaj   +1 more source

Tectonostratigraphic position of the Finnish Caledonides at the Fennoscandian margin of the northern Scandes [PDF]

open access: yesBulletin of the Geological Society of Finland, 1989
The Finnish Caledonides consist of the lower structural units characteristic of much of the northern Scandes, whose foreland is now known to be Archaean throughout its extension in Finland.
J.J. Lehtovaara
doaj   +1 more source

Interpreting intraplate tectonics for seismic hazard : a UK historical perspective [PDF]

open access: yes, 2012
It is notoriously difficult to construct seismic source models for probabilistic seismic hazard assessment in intraplate areas on the basis of geological information, and many practitioners have given up the task in favour of purely seismicity-based ...
Arup   +16 more
core   +2 more sources

THE OLKHON GEODYNAMIC PROVING GROUND (LAKE BAIKAL): HIGH RESOLUTION SATELLITE DATA AND GEOLOGICAL MAPS OF NEW GENERATION

open access: yesГеодинамика и тектонофизика, 2015
The Olkhon region of the Western Pribaikalie is highly attractive for geologists due to the presence of diverse metamorphic complexes and highly complicated combinations of folded structures in this region. The Olkhon region is located within the area of
Valentin S. Fedorovsky   +1 more
doaj   +1 more source

A black shale protolith for gold-tellurium mineralisation in the Dalradian Supergroup (Neoproterozoic) of Britain and Ireland [PDF]

open access: yes, 2017
The Dalradian Supergroup of Britain and Ireland is mineralised by gold-tellurium vein deposits. The host succession includes carbonaceous, pyritic shales (pelites) which were a source of trace elements, including gold and tellurium.
Armstrong, J.   +5 more
core   +1 more source

Recycling Argon through Metamorphic Reactions: the Record in Symplectites [PDF]

open access: yes, 2018
The 40Ar/39Ar ages of metamorphic micas that crystallized at high temperatures are commonly interpreted as cooling ages, with grains considered to have lost 40Ar via thermally-driven diffusion into the grain boundary network.
Allaz   +82 more
core   +2 more sources

A new look at reflection seismic data from the Central Caledonian Transect across the Scandinavian Peninsula [PDF]

open access: yesSolid Earth
This study revisits seismic reflection data from the Central Scandinavian Caledonides, initially acquired during campaigns in the late 1980s and early 1990s.
C. Juhlin, R. Lescoutre, B. Almqvist
doaj   +1 more source

Late Precambrian U-Pb titanite age for peak regional metamorphism and deformation (Knoydartian orogeny) in the western Moine, Scotland [PDF]

open access: yes, 2003
There has been controversy over the number and timing of orogenies in the Precambrian Moine block in the Scottish Caledonides since the earliest radiometric dating in the 1960s. This work challenges a recent hypothesis, that this sector of the Laurentian
Evans, J.A., Tanner, P.W.G.
core   +1 more source

Silurian bentonites in Lithuania: correlations based on sanidine phenocryst composition and graptolite biozonation – interpretation of volcanic source regions [PDF]

open access: yesEstonian Journal of Earth Sciences, 2014
Integrated correlation of bentonites (altered volcanic ashes) and graptolite biozonation is presented. Detailed study of two Lithuanian drill core sections extended previous knowledge of the occurrence and composition of bentonites to the south ...
Tarmo Kiipli   +2 more
doaj   +1 more source

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