raahe ladoga shear complex

= Bothnia-Senja shear system, MOL = Malangen-Onega Lineament, PC = Pudasjärvi Complex, PSZ = Pajala Shear Zone, RLZ = Raahe-Ladoga Zone (modified after Bergh et al. 2014). b) Geology of the study area with reference to geochronology work conducted in …

The mine lies within the north-western section of the Raahe-Ladoga suture zone that extends up to 450km in length. Structurally, the deposit is complex with various types of intrusive rocks cross cutting the metamorphosed and folded sedimentary rocks and volcanic schist belts.

The Otso gold deposit is in the 450 km long Savo Belt, immediately adjacent to the Raahe-Ladoga suture. The Savo Belt comprises supracrustal mafic-ultramafic volcanic and volcano sedimentary rocks, and accretionary prism nappe complexes, which have been intruded by mafic plutons and several generations of granitoid stocks and dykes.

north-east shore of Ladoga lake (Republic of Karelia, Russian Federation). This region is situated in the shear zone between Archean Karelian craton (massif) and early Proterozoic Svecofennian belt (Fig. 1). This shear zone is called Raahe-Ladoga zone (Korsman et al. 1988). The Raahe-Ladoga zone has been known as a main tectonic and ore bearing

Dec 15, 2020· The Savo belt also coincides with the lithosphere-scale Raahe-Ladoga shear zone (RLSZ), which has been interpreted to represent the deep suture between the Archean Karelian province and the Proterozoic Svecofennian domain, or the A–P boundary (Lahtinen et al., 2015).

We have studied geophysical properties of the Raahe-Ladoga Shear Complex, a major NW-SE trending strike-slip shear zone in Central Finland. Aeromagnetic and airborne electromagnetic data from the Raahe-Ladoga Shear Complex, provided by the Geological Survey of Finland, were processed and interpreted in combination with the regional gravity data ...

Oct 01, 2019· The Siilinjärvi carbonatite complex is located in the south-eastern part of the Archean Karelia province, close to the boundary to the Paleoproterozoic Svecofennia province and the NW-SE trending Raahe-Ladoga shear complex (RLSC in Fig. 1a; Kärki et al., 1993).Karelia is the largest of the Archean provinces in the Fennoscandian Shield, separated from the Lapland-Kola province in the ...

Sep 01, 2015· Although the ramification of the various shear zones in northern Sweden is complex (Bergman et al., 2001, Bergman et al., 2006), a temporal correlation with the Malangen-Onega and Raahe-Ladoga mega-shear zone systems (Kärki et al., …

These shear tectonic events deformed ductilely prekinematic ... the Raahe-Ladoga zone (Kahma 1978, Gaál & Gorbatschev 1987, Korsman 1988), and Sm-Nd ... IV. Manamansalo Complex 4. Puolanka Schist Zone. HSZ and OSZ as in Fig. 1. After Kärki (1995). 12496Bulletin73 90 29.1.2002, 15:31. Timing of Palaeoproterozoic crustal shearing in the central ...

Structure of the Raahe –Ladoga Shear Complex E. Lanne. Coda waves of local earthquakes: A case history from northern Finland 59 E. Lehtonen, T. Halkoaho, P. Hölttä, H. Huhma, E. Luukkonen, E. Heilimo 63 and A. Käpyaho. Constraining the age and evolution of Archean greenstone belts

Apr 02, 2021· The Northern Ladoga area is located on the southeastern flank of the Raahe-Ladoga Suture Zone ... The amphibolite-facies metamorphism and linked shear deformations led to the formation of granite gneiss domes surrounded by volcanosedimentary rocks of the Sortavala ... At 3–5 kbar typical of the Northern Ladoga metamorphic complex, a ...

Contact measurements carried out in Lake Ladoga during the LADEX-80 experiment shown that generation of high frequency IW in the lake resulted from shear unstability of subsurface currents associated with strong current gradients [16]. Periodic current strengthens and reductions result from large-scale wind stress variations.

Norra Kärr or Norra Kärr Alkaline Complex is an intrusive complex cropping out at the boundary between Östergötland and Småland, Sweden. The complex is chiefly made up of peralkaline nepheline syenite and is rich in exotic minerals. Rocks of the complex intruded into the Paleoproterozoic-aged Växjo granites of the Transscandinavian Igneous Belt. Alfred Elis Törnebohm was the first to ...

The small Pirilä gold deposit, which is located in the southeastern part of the Svecofennian complex near the Archean/Proterozoic boundary, is hosted by quartz veins and lenses occurring in mica schist. The rocks of the area were metamorphosed under conditions of amphibolite facies. Gold is invariably associated with sulphides. Microthermometry of fluid inclusions in quartz indicates four ...

This suture zone is occupied by the NW-SE to NNW-SSE trending Raahe-Ladoga Shear Complex in Finland which continues across the head of the Gulf of Bothnia as the generally north-south Pajala Shear Zone in northern Sweden before passing into northwestern Finland and neighbouring Norway (e.g., Henerson et al., 2015). This convergence and ...

development of complex islan（1arc systems（Fig。1a）． ... ing Raahe・Ladoga zone（R－L）and Vammala Nickel ... seated faults and shear zones that possibly controlled the emplacement of Ni－bearing ultramac－mafic intru sions in the R－L zone and VNB belt（e．g．Gaa1,1990）． ...

represent broad shear zones where transcurrent ... Raahe-Ladoga block /6/(SOl) North of Skelleftel block /8/(SO3) ... 23 CSDG, Dala Complex /14/(GO3) 24 CSDG, Ulv6 Complex /13/(GO2) 25 CSDG, Jamtland Complex /15/(GO4) Early Jotnian 1300 (Post-) Jotnian 1260 ...

The Raahe–Ladoga Shear Complex is a major crustal structure representing the Archaean–Palaeoproterozoic boundary in the Fennoscandian Shield. The complex developed during the Svecofennian Orogeny ( c. 1.9 – 1.8 Ga) beginning with regional thrust tectonic phases D1 and D2, followed by large-scale shearing events D3 and D4.

The Raahe–Ladoga Shear Complex (RLSC) represents a major, c. 100 km wide, NW-SE trending system of vertical shear zones, wrench faults and intervening crustal blocks in the central part of the Fennoscandian Shield (Woodard et al., 2015). It sepa-rates the partly reworked Archaean Karelia Craton and folded and metamorphosed Pal-

Journal of the Geological Society, London, Vol. 147, 1990, pp. 561-562, Printed in Northern Ireland Conference Report Metamorphic studies: research in progress G. T. R. DROOP Department of Geology, University of Manchester, Oxford Road, Manchester M13 9PL, UK A Metamorphic Studies Group meeting on 'Metamorphic Studies: Research in Progress' and the eighth Annual General Meeting of the

Finland is the Central Finland Granitoid Complex (CFGC, c. 1.88 Ga), which is separated from the Ar- ... which is also known in Finland as the Raahe– Ladoga Belt. Another nickel-bearing belt, the Vam-mala Nickel Belt, runs in NW–SE direction south- ... the generation of a high temperature shear zone, con- ...

Jul 25, 2015· Structure of the Raahe - Ladoga Shear Complex. In: Lithosphere 2012 : Seventh Symposium on the Structure, Composition and Evolution of the Lithosphere in Finland, Espoo, November 6-8, 2012 : programme and extended abstracts.

Oct 01, 2015· A large-scale wrench fault zone, the Raahe-Ladoga shear complex (RLSC), transects the western part of the Iisalmi complex, the Outokumpu area and the Savo belt (Korsman and Glebovitsky, 1999). The Central Finland granitoid complex (1.8–1.9 Ga) consists mainly of granitoid rocks and minor amounts of supracrustal units and gabbroic plutons ...

Jan 01, 2015· The volcano-sedimentary host rocks belong to a 1.93–1.92 Ga island arc that occurs along the northwestern parts of the Raahe-Ladoga shear complex. The stratigraphy in the region is divided into two units, a lower bimodal volcanic unit conforming to the Pyhäsalmi group and an upper volcano-sedimentary association defined as the Vihanti group.

Mar 01, 2017· The Raahe–Ladoga Shear Complex is a major crustal structure representing the Archaean–Palaeoproterozoic boundary in the Fennoscandian Shield. The complex developed during the Svecofennian Orogeny ( c. 1.9 – 1.8 Ga) beginning with regional thrust tectonic phases D1 and D2, followed by large-scale shearing events D3 and D4. The Pielavesi Shear Zone is a vertical …

Orogenic gold provinces in the Svecofennian domain occur in three arc complexes: in the 1.93-1.87 Ga primitive arc complex along the collision zone (e.g. Savo belt in the Raahe-Ladoga zone) between the Svecofennian and Karealian domains (Laivakangas province), in the 1.90-1.87 Ga Central Svecofennian accretionary arc complex (Seinäjoki, Tampere and Pirkkala provinces) and in the

the Raahe–Ladoga shear complex. In the Cent-ral Finland granitoid complex the deformation took place around 1.88–1.86 Ga, which can indicate that also the Eastern part of the orogen suffered coeval deformation (Nikkilä et al. 2016, Nikkilä 2016). Analog modeling seems a practical tool also in modeling tectonic evolution of an ancient orogen.

The Raahe–Ladoga Shear Complex is a major crustal structure representing the Archaean–Palaeoproterozoic boundary in the Fennoscandian Shield. The complex developed during the Svecofennian Orogeny ( c. 1.9 – 1.8 Ga) beginning with regional thrust tectonic phases D1 and D2, followed by large-scale shearing events D3 and D4. The Pielavesi Shear Zone is a vertical …