Results 1 to 10 of about 123,040 (111)

HETEROGENEOUS LITHOSPHERIC STRUCTURE OF THE FENNOSCANDIAN SHIELD: SEISMIC DATA [PDF]

open access: yesГеодинамика и тектонофизика, 2022
A generalization has been obtained based on the data for deep seismic studies on longitudinal DSS profiles (explosion seismology) and seismological evidence found for local and distant earthquakes (earthquake seismology) in the Fennoscandian Shield over ...
N. V. Sharov, A. A. Lebedev
doaj   +2 more sources

Seismic model of the Earth's crust and upper mantle beneath the Fennoscandian Shield [PDF]

open access: yesE3S Web of Conferences, 2023
Well-founded concepts of the crust and upper mantle structure of the Fennoscandian Shield were developed. Quantitative evidence for horizontal and vertical lithospheric heterogeneities was obtained.
Lebedev Artem, Sharov Nikolay
doaj   +2 more sources

Connectivity of Fennoscandian Shield terrestrial deep biosphere microbiomes with surface communities [PDF]

open access: yesCommunications Biology, 2022
Westmeijer et al. employ high-throughput sequencing to investigate the connection between deep biosphere groundwaters and surface microbial communities.
George Westmeijer   +10 more
doaj   +3 more sources

Investigating Layered Cratonic Lithosphere in the Fennoscandian Shield

open access: yesGeochemistry, Geophysics, Geosystems
Cold, thick, and chemically depleted lithosphere with high seismic velocity and low attenuation characterizes continental cratons. However, discrepancies between xenolith‐based thermal constraints and those inferred from surface‐wave seismic models ...
Yiran Huang   +2 more
doaj   +2 more sources

Paleolatitude and cause of the Svecokarelian orogeny [PDF]

open access: yesBulletin of the Geological Society of Finland, 1974
Paleomagnetic data suggest a paleolatitude of 22°N for the Fennoscandian protocontinent during the Svecokarelian orogeny. This is lower than that of the Canadian shield during the same period.
K.J. Neuvonen
doaj   +1 more source

Petrogenesis of the Paleoproterozoic Näränkävaara layered intrusion, northern Finland, Part II: U-Pb ID-TIMS age and Sm-Nd isotope systematics [PDF]

open access: yesBulletin of the Geological Society of Finland, 2022
Several mafic-ultramafic layered intrusions were emplaced in the NE Fennoscandian Shield during a magmatic episode at 2.44 Ga. The Paleoproterozoic Näränkävaara layered intrusion, northern Finland, is one of the largest ultramafic bodies in the ...
Ville Järvinen   +8 more
doaj   +1 more source

Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield

open access: yesNature Communications, 2022
Dissolved organic matter in the Fennoscandian Shield deep continental bedrock fracture waters of varying characteristics and ages carries a strong terrigenous signature, and only a small proportion of this potential energy source links to the deep ...
Helena Osterholz   +6 more
doaj   +1 more source

Energy efficiency and biological interactions define the core microbiome of deep oligotrophic groundwater

open access: yesNature Communications, 2021
Ecological constraints on microbial niches in oligotrophic deep groundwaters remain elusive. This study provides support for the existence of a common core microbiome in two deep groundwater biomes of the Fennoscandian Shield using a genome-resolved ...
Maliheh Mehrshad   +8 more
doaj   +1 more source

POLENET/LAPNET teleseismic P wave travel time tomography model of the upper mantle beneath northern Fennoscandia [PDF]

open access: yesSolid Earth, 2016
The POLENET/LAPNET (Polar Earth Observing Network) broadband seismic network was deployed in northern Fennoscandia (Finland, Sweden, Norway, and Russia) during the third International Polar Year 2007–2009.
H. Silvennoinen   +2 more
doaj   +1 more source

Timing of Palaeoproterozoic crustal shearing in the central Fennoscandian Shield according to U-Pb data from associated granitoids, Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2001
Granitoids in the Finnish part of the Fennoscandian Shield were created by numerous Archaean and Palaeoproterozoic tectonic events. Late phases of Palaeoproterozoic, Svecokarelian deformation created ductile, crustal-scale shear zones, of which the N-S ...
M. Vaasjoki, A. Kärki, K. Laajoki
doaj   +1 more source

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