Results 91 to 100 of about 975 (179)

Biotite and muscovite 40Ar/39Ar geochronological constraints on the post-Svecofennian tectonothermal evolution, Forsmark site, central Sweden

open access: yes, 2009
In order to characterize the post-Svecofennian tectonothermal evolution of the Fennoscandian Shield, 40Ar-39Ar biotite and some 40Ar-39Ar muscovite geochronological data are reported from a total of 30 surface outcrop and 1000 m long borehole samples at ...
Page, Laurence,   +7 more
core   +1 more source

Geometry and kinematic evolution of ductile shear zones in the Ersfjord Granite (1.79 Ga), West Troms Basement Complex: A Svecofennian accretionary thrust system [PDF]

open access: yes, 2018
The Ersfjord Granite is a 1.79 Ga felsic intrusion in the geological region of West Troms Basement Complex (WTBC). Its intrusion history and evolution relative to surrounding Neoarchean TTG-gneisses has until now been poorly understood, providing the ...
Haaland, Linda Cecilia
core  

Late Svecofennian sedimentary basins in the crystalline basement of NE Poland and adjacent area of Lithuania: ages, major sources of detritus, and correlations [PDF]

open access: yes, 2016
The Precambrian basement of Lithuania and NE Poland, much of which is metasedimentary paragneiss, can be accessed only by cores from deep boreholes.
Wiszniewska, Janina   +3 more
core   +1 more source

The effect of low-temperature annealing on discordance of U-Pb zircon ages. [PDF]

open access: yesSci Rep, 2021
Herrmann M   +5 more
europepmc   +1 more source

1.90-1.88Ga arc magmatism of central Fennoscandia: geochemistry, U-Pb geochronology, Sm-Nd and Lu-Hf isotope systematics of plutonic-volcanic rocks from southern Finland

open access: yesGeologica Acta, 2016
The earliest Svecofennian magmatism in southern Finland has been dated at 1.90-1.88Ga. As an example of this, the Orijärvi (ca. 1.89Ga) and Enklinge (ca.
J. KARA   +5 more
doaj  

Numerical Modelling of Mid-Crustal Flow Applied to Svecofennian Orogeny [PDF]

open access: yes, 2015
This work explores the lateral spreading of hot, thick, Paleoproterozoic crust via a series of 2D thermomechanical numerical models based on two geometrical a priori models of the thickened crust: plateau and plateau margin.
Lammi, Hannu
core  

Palaeoproterozoic adakite- and TTG-like magmatism in the Svecofennian orogen, SW Finland

open access: yesGeologica Acta, 2013
The Palaeoproterozoic Svecofennian orogen in the Fennoscandian shield is an arc accretionary orogen that was formed at c. 1.92-1.86Ga. Arc accretion, magmatism and the subsequent continent-continent collision thickened the crust up to c.
M. VÄISÄNEN   +4 more
doaj  

Geological, petrographic and geochemical evaluation of two Svecofennian ultramafic serpentinized bodies in Pernaja, SE Finland [PDF]

open access: yes, 2019
When mafic-ultramafic rocks get encountered with fluids in conditions of low temperature and pressure, they are subject to an alteration form known as serpentinization.
Ingves, Jonas
core  

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