Linkage of crustal deformation between the Archaean basement and the Proterozoic cover in the Peräpohja Area, northern Fennoscandia

Piippo, Simo; Skyttä, Pietari; Kloppenburg, A.

doi:10.1016/j.precamres.2019.02.003

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Peräpohja Belt1

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Cited by 17 publications

(1 citation statement)

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“…1c; Lahtinen et al, 2005;Laajoki, 2005;Hölttä and Heilimo, 2017). For a detailed Svecofennian tectonic evolution model of the PB, as well as deformation stages and related granitic intrusions, the reader is referred to Nironen (2017), Lahtinen et al (2015) and Piippo et al (2019).…”

Section: Peräpohja Beltmentioning

confidence: 99%

Building Geochemical Vectors with Trace Element Compositions of Sulfides in Orogenic Gold Mineral Systems in Northern Finland

Raič

Molnár²,

O’Brien

et al. 2023

Preprint

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Section: Peräpohja Beltmentioning

confidence: 99%

Building Geochemical Vectors with Trace Element Compositions of Sulfides in Orogenic Gold Mineral Systems in Northern Finland

Raič

Molnár²,

O’Brien

et al. 2023

Preprint

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Structural controls on cobalt mineralisation during regional metamorphism: an example from the Rajapalot area, Finland

Sayab,

Menzies,

Palin

et al. 2024

Miner Deposita

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The Rajapalot area of Finnish Lapland hosts an unusually high-grade association of cobalt-only and gold–cobalt deposits (10.91 Mt @ 2.5 g/t Au + 0.44% Co total inferred resources) within multiply folded metasedimentary rocks of the Paleoproterozoic Svecofennian collisional orogeny. Through the integration of X-ray computed micro-tomography and micro-X-ray fluorescence raster imaging of drill-core samples, we produce a model of cobalt-bearing ore mineralisation, which reveals primary fluid transportation mechanisms and precipitation pathways. When combined with the deposit-scale, high-resolution ground-based magnetic geophysical data, we show that cobalt-bearing ores in the Rajapalot region occur mostly as saddle reefs located in dilated fold hinges, which formed by simultaneous synthetic and antithetic shearing along developing crenulation-cleavage planes and incompetent bedding layers, respectively. We suggest that multi-layered rock complexes with alternations of competent and incompetent layers deformed and metamorphosed to upper greenschist-lower amphibolite facies should represent focus regions for cobalt exploration targeting campaigns in orogenic belts. The non-destructive workflow presented in this study could be an integral part of an early stage of cobalt mineral processing and traceability before metallurgical treatment.

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Building geochemical vectors with trace element compositions of sulfides in orogenic gold mineral systems in northern Finland

Raič

Molnár

O’Brien

et al. 2023

Journal of Geochemical Exploration

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Linkage of crustal deformation between the Archaean basement and the Proterozoic cover in the Peräpohja Area, northern Fennoscandia

Cited by 17 publications

References 32 publications

Building Geochemical Vectors with Trace Element Compositions of Sulfides in Orogenic Gold Mineral Systems in Northern Finland

Building Geochemical Vectors with Trace Element Compositions of Sulfides in Orogenic Gold Mineral Systems in Northern Finland

Structural controls on cobalt mineralisation during regional metamorphism: an example from the Rajapalot area, Finland

Building geochemical vectors with trace element compositions of sulfides in orogenic gold mineral systems in northern Finland

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