Geology and crystallization conditions of the Särkiniemi intrusion and related nickel-copper ore, central Finland – implications for depth of emplacement of 1.88 Ga nickel-bearing intrusions [PDF]
Bulletin of the Geological Society of Finland, 2020 Several Ni-Cu deposits occur within the Kotalahti area, central Finland, in proximity to an Archaean gneiss dome surrounded by a Palaeoproterozoic craton-margin supracrustal sequence comprising quartzites, limestones, calc-silicate rocks, black schists ...
Hannu V. Makkonen, Pekka Tuisku
doaj +1 more source
Rock magnetic investigations constraining relative timing for gold deposits in Finland [PDF]
Bulletin of the Geological Society of Finland, 2011 Palaeomagnetic and anisotropy of magnetic susceptibility (AMS) studies were carried out on a orogenic gold deposit in Jokisivu, located in the western part of the Pirkanmaa Belt in the Svecofennian domain of southern Finland.
S. Mertanen, F. Karell
doaj +1 more source
Pukala intrusion, its age and connection to hydrothermal alteration in Orivesi, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 2005 The Pukala intrusion is situated in the Paleoproterozoic Svecofennian domain of the Fennoscandian Shield in the contact region between the Central Finland Granitoid Complex and the Tampere Belt.
M. Talikka, I. Mänttäri
doaj +1 more source
Hydrogeological Characterization of Crystalline Bedrock Using Borehole Magnetic Resonance
Groundwater, Volume 61, Issue 6, Page 793-815, November/December 2023., 2023 This study is one of the first to test the applicability of the borehole magnetic resonance (BMR) method in crystalline “hard rock” environment. The aim was to investigate whether the BMR measurements could constitute an effective method for investigating detailed permeability variations in the crystalline bedrock of the two study sites: Sakatti mining
Salla Eeva +7 more
wiley +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 [PDF]
, 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
Woodard Jeremy +5 more
core +1 more source
The Pyhäntaka formation, Southern Finland: A sequence of metasandstones and metavolcanic rocks upon an intra-orogenic unconformity [PDF]
Bulletin of the Geological Society of Finland, 2011 Detrital zircon studies suggest that the few quartzite occurrences in southern Finland are younger than 1.87 Ga and express sedimentation after 1.89–1.87 Ga accretional deformation and metamorphism in the Svecofennian orogenic belt.
M. Nironen
doaj +1 more source
Genesis of subglacial triangular‐shaped landforms (murtoos) formed by the Fennoscandian Ice Sheet
Earth Surface Processes and Landforms, Volume 48, Issue 11, Page 2171-2196, 15 September 2023., 2023 Murtoos are primarily depositional subglacial landforms with erosional triangular heads in the direction of the ice flow. They are produced by repeated high meltwater input and varying periodic deformation by the overriding ice. Murtoos represent a semi‐distributed drainage system under high‐pressure conditions where the rapid mobilisation of ...
Joni Mäkinen +6 more
wiley +1 more source
Supracrustal rocks in the Kuovila area, Southern Finland: Structural evolution, geochemical characteristics and the age of volcanism [PDF]
Bulletin of the Geological Society of Finland, 2005 The supracrustal rocks of the Kuovila area in the Palaeoproterozoic Svecofennian Uusimaa Belt, southern Finland, consist mainly of volcaniclastic rocks associated with banded iron formations (BIFs) and marbles.
P. Skyttä, A. Käpyaho, I. Mänttäri
doaj +1 more source
Geophysical Prospecting, Volume 71, Issue 7, Page 1132-1151, September 2023., 2023 Abstract Mineral exploration is facing greater challenges nowadays because of the increasing demand for raw materials and the lesser chance of finding large deposits at shallow depths. To be efficient and address new exploration challenges, high‐resolution and sensitive methods that are cost‐effective and environmentally friendly are required.
Alba Gil +7 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 24, Issue 5, May 2023., 2023 Abstract Recent studies have shown that biosignatures of ancient microbial life exist in mineral coatings in deep bedrock fractures of Precambrian cratons, but such surveys have been few and far between. Here, we report results from southwestern Sweden in an area of 1.6–1.5 Ga Paleoproterozoic rocks heavily reworked by the 1.14–0.96 Ga Sveconorwegian ...
Henrik Drake +4 more
wiley +1 more source