Results 31 to 40 of about 2,476 (218)

Broadband seismic source data acquisition and processing to delineate iron oxide deposits in the Blötberget mine‐central Sweden

Geophysical Prospecting, Volume 70, Issue 1, Page 79-94, January 2022., 2022
ABSTRACT A prototype electromagnetic vibrator, referred to here as E‐Vib, was upgraded and developed for broadband hardrock and mineral exploration seismic surveys. We selected the iron oxide mine in Blötberget, central Sweden, for a test site in 2019 for the newly developed E‐Vib because of the availability of earlier seismic datasets (from 2015 to ...
Tatiana Pertuz, Alireza Malehmir, Jordan Bos, Bojan Brodic, Yinshuai Ding, Richard de Kunder, Paul Marsden   +6 more
wiley   +1 more source

Cool deltas: Sedimentological, geomorphological and geophysical characterization of ice‐contact deltas and implications for their reservoir properties (Salpausselkä, Finland)

Sedimentology, Volume 68, Issue 7, Page 3057-3101, December 2021., 2021
Abstract Sediments deposited by glacial meltwaters (for example, ice‐contact delta deposits) form permeable packages in the subsurface that can act as reservoirs for both water and hydrocarbons. They are also an important source of aggregate for the construction industry.
Bartosz KurjaŃski, Brice R. Rea, Matteo Spagnolo, David G. Cornwell, John Howell, Jean‐Christophe Comte, AndrÉs GonzÁlez QuirÓs, Jukka‐Pekka Palmu, Rachel P. Oien, Philip L. Gibbard, Victoria Valdez   +10 more
wiley   +1 more source

Petrology, geochemistry, and geochronology of the leucogranites in southernmost Finland [PDF]

Bulletin of the Geological Society of Finland
In the southernmost part of the Svecofennian province in Finland, leucogranites and migmatites stemming from both igneous and sedimentary protoliths reflect the complex magmatic history of the Svecofennian orogeny between 1.89 and 1.82 Ga.
Anna Saukko, Kaisa Nikkilä, Olav Eklund, Sören Fröjdö, Markku Väisänen   +4 more
doaj   +1 more source

Rare Earth Elements in Middle Precambrian Volcanic Rocks of Finland, with a Discussion of the Origin of the Rocks [PDF]

Bulletin of the Geological Society of Finland, 1975
The contents of rare earth elements (REE) have been determined in five Svecofennian metamorphosed volcanic rocks and are compared with those found in the Karelian zone and Recent tholeiites.
T. Koljonen, R.J. Rosenberg
doaj   +1 more source

Unusual, basin-scale, fluid–rock interaction in the Palaeoproterozoic Onega basin from Fennoscandia : Preservation in calcite δ18O of an ancient high geothermal gradient [PDF]

, 2016
Acknowledgements We acknowledge financial support from ICDP for the drilling programme. AEF, ATB and ARP thank NERC for financial support through NE/G00398X/1. VAM thanks the Norwegian Research Council for financial support through 191530/V30.
Brasier, A. T., Fallick, A. E., Melezhik, V. A., Prave, A. R.   +3 more
core   +1 more source

Early Svecofennian rift-related magmatism: Geochemistry, U-Pb-Hf zircon isotope data and tectonic setting of the Au-hosting Uunimäki gabbro, SW Finland

, 2021
We characterise the geochemistry, zircon Lu-Hf composition, age and the structure of the Uunimaki gabbro (UGB) in south-western Finland to improve the understanding of i) the early Svecofennian (1.92–1.89 Ga) crustal evolution of the central ...
J. Kara, T. Leskelä, M. Väisänen, P. Skyttä, Y. Lahaye, M. Tiainen, H. Leväniemi   +6 more
semanticscholar   +1 more source

Tracing the SW border of the Svecofennian Domain in the Baltic Sea region: evidence from petrology and geochronology from a granodioritic migmatite

International journal of earth sciences, 2021
Geological investigations of a part of the crystalline basement in the Baltic Sea have been performed on a drill core collected from the depth of 1092–1093 m beneath the Phanerozoic sedimentary cover offshore the Latvian/Lithuanian border. The sample was
Evgenia Salin, J. Woodard, K. Sundblad
semanticscholar   +1 more source

Reconstructing craton‐scale tectonic events via in situ Rb‐Sr geochronology of poly‐phased vein mineralization

Terra Nova, Volume 33, Issue 5, Page 502-510, October 2021., 2021
Abstract Fault‐ and fracture‐hosted multi‐stage mineral assemblages that formed by fracture reactivation and fluid migration, constitute archives of the tectonic evolution of Precambrian cratons. Complex intergrowth patterns of these mineral records often hinder absolute dating of mineralization events for geological models.
Mikael Tillberg, Henrik Drake, Thomas Zack, Johan Hogmalm, Ellen Kooijman, Mats Åström   +5 more
wiley   +1 more source

Detrital zircon geochronology of Paleoproterozoic metasedimentary rocks from Jämsä, Central Finland [PDF]

Bulletin of the Geological Society of Finland
In this short communication, we present new detrital single grain zircon U-Pb data for six metasedimentary rock samples from Jämsä, Central Finland.
Perttu Mikkola, Matti Kurhila, Hannu Huhma   +2 more
doaj   +1 more source

On the microfossils of Corycium enigmaticum [PDF]

Bulletin of the Geological Society of Finland, 1969
This paper deals with alga-like microfossils found in the about 2 000 m.y. old schist belt situated N of Tampere, SW Finland and belonging to the lower Svecofennian.
A. Matisto
doaj   +1 more source