Results 51 to 60 of about 749 (183)
The »Bockholm conglomerate» – an intrusive breccia in Åland, SW Finland [PDF]
Bulletin of the Geological Society of Finland, 1979 Three breccias composed of a heterogeneous mixture of rock fragments in a clastic matrix have been studied in the Enklinge area, southwestern Finland.
C. Ehlers
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An intrusive-like tectonic breccia in the archipelago of southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1986 On an islet in the archipelago of southwestern Finland with metamorphic rocks belonging to the Svecofennian zone it is possible to follow in exposure for a distance of some metres the transition from a layered paragneiss with amphibolite bands to a ...
N. Edelman, L. Bergman, B. Lindberg
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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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1865 Ma tholeiitic magmatism during an extensional episode of the Svecofennian orogeny: the Kaiplot gabbros in Nagu (Nauvo), southwestern Finland [PDF]
Bulletin of the Geological Society of FinlandThe Svecofennian orogeny in southern Finland has traditionally been divided into two broadly defined compressional stages, the 1.89–1.87 Ga “synorogenic” stage and the ca 1.84–1.81 Ga “lateorogenic” stage.
Olav Eklund, Jussi S. Heinonen
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Mafic-silicic magma interaction in the layered 1.87 Ga Soukkio Complex in Mäntsälä, southern Finland [PDF]
Bulletin of the Geological Society of Finland, 2002 The Svecofennian layered Soukkio Complex (1.87 Ga) in Mäntsälä, southern Finland, consists of layered tholeiitic gabbro and porphyritic calc-alkaline monzonite, quartz monzonite and granite, mingled together.
T.T. Eerola
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Geostandards and Geoanalytical Research, Volume 49, Issue 2, Page 343-356, June 2025.Key Points An analytical strategy for determining boron isotope ratios in Ca‐amphiboles using LA‐MC‐ICP‐MS is presented. Accurate δ11B results can be achieved using the USGS BHVO‐2G glass as the calibrating reference material. Two proposed Ca‐amphibole RMs exhibit good homogeneity with δ11B intermediate measurement precision of 2.86‰ and 3.96‰ (2s ...
Enrico Cannaò +3 more
wiley +1 more source
, 2015 The mostly metasedimentary Svecofennian Western Pohjanmaa belt in Ostrobothnia, Finland, can be divided into two stratigraphic groups separated by a major unconformity that reflects deformation following regional metamorphism.
Williams, Ian +2 more
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Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.Abstract The Yangtze Craton in South China is generally regarded as an Archean‐Paleoproterozoic continental nucleus with a coherent basement that collided with the Cathaysia Block in the Early Neoproterozoic. Here we reprocessed a 300‐km‐long NW‐trending seismic reflection profile in the eastern Yangtze Craton.
Xiaofan Deng +7 more
wiley +1 more source
Broadband seismic data acquisition and processing of iron oxide deposits in Blötberget, Sweden
Geophysical Prospecting, Volume 73, Issue 1, Page 80-95, January 2025.Abstract In June 2022, an innovative seismic survey was conducted in Blötberget, central Sweden, to evaluate the effectiveness of employing both a broadband seismic source and broadband receivers for mineral exploration in a challenging hardrock setting. The Blötberget mine hosts high‐quality iron oxides, predominantly magnetite and hematite, sometimes
Lea Gyger +8 more
wiley +1 more source
Crustal structure of the Baltic shield beneath the Sea of Bothnia; BABEL line 6 [PDF]
, 1993 As part of the 1989 BABEL project, Durham University recorded large quantities of high resolution wide-angle data from six deep seismic lines shot in the Gulf of Bothnia. Fifteen analogue and three digital seismic recording stations were used, located in
Matthews, P.A.
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