Anna Ladenberger

Geological Survey of Sweden

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Clemens Reimann

Norwegian Geological Survey

Manfred Birke

Federal Institute for Geosciences and Natural Resources

Philippe Négrel

Bureau de Recherches Géologiques et Minières

Martiya Sadeghi

Geological Survey of Sweden

Alecos Demetriades

Institute of Geology and Mineral Exploration

David G. Gee

Gannon University

Jarosław Majka

AGH University of Krakow

Peter Filzmoser

TU Wien

Enrico Dinelli

University of Bologna

Jurian Hoogewerff

University of Canberra

Cooperative Institutions

Gemalto (Israel)

Norwegian Geological Survey

Geological Survey of Sweden

University of Johannesburg

Geological Survey of Finland

Departamento de Ciência e Tecnologia

Bureau de Recherches Géologiques et Minières

Federal Institute for Geosciences and Natural Resources

TU Bergakademie Freiberg

Australian National University

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CO2 fluid inclusions in mantle xenoliths from Lower Silesia (SW Poland): formation conditions and decompression history

European Journal of Mineralogy (2009)

Anna Ladenberger Peter Lazor Marek Michalík

Xenolith

10.1127/0935-1221/2009/0021-1930

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Citations (7)

Bioavailable 87Sr/86Sr in European soils: A baseline for provenancing studies

The Science of The Total Environment (2019)

Jurian Hoogewerff Clemens Reimann Henriëtte Ueckermann Robert Frei Karin Margarita Frei

10.1016/j.scitotenv.2019.03.387

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Citations (113)

Tectonometamorphic evolution of the Åreskutan Nappe – Caledonian history revealed by SIMS U–Pb zircon geochronology

Geological Society London Special Publications (2013)

Anna Ladenberger Yaron Be’eri-Shlevin Stefan Claesson David G. Gee Jarosław Majka

Abstract Secondary ionization mass spectrometry (SIMS) U–Pb dating of zircons from the Åreskutan Nappe in the central part of the Seve Nappe Complex of western central Jämtland provides new constraints on the timing of granulite–amphibolite-facies metamorphism and tectonic stacking of the nappe during the Caledonian orogeny. Peak-temperature metamorphism in garnet migmatites is constrained to c. 442±4 Ma, very similar to the ages of leucogranites at 442±3 and 441±4 Ma. Within a migmatitic amphibolite, felsic segregations crystallized at 436±2 Ma. Pegmatites, cross-cutting the dominant Caledonian foliation in the Nappe, yield 428±4 and 430±3 Ma ages. The detrital zircon cores in the migmatites and leucogranites provide evidence of Late Palaeoproterozoic, Mesoproterozoic to Early Neoproterozoic source terranes for the metasedimentary rocks. The formation of the ductile and hot Seve migmatites, with their inverted metamorphism and thinning towards the hinterland, can be explained by an extrusion model in which the allochthon stayed ductile for a period of at least 10 million years during cooling from peak-temperature metamorphism early in the Silurian. In our model, Baltica–Laurentia collision occurred in the Late Ordovician–earliest Silurian, with emplacement of the nappes far on to the Baltoscandian platform during the Silurian and early Devonian, Scandian Orogeny lasting until c. 390 Ma.

Geochronology

10.1144/sp390.10

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Citations (31)

The Baltoscandian margin detrital zircon signatures of the central Scandes

Figshare (2016)

David G. Gee Anna Ladenberger Peter Dahlqvist Jarosław Majka Yaron Be’eri-Shlevin

In central parts of the Scandinavian Caledonides, detrital zircon signatures provide evidence of the change in character of the Baltoscandian crystalline basement, from the characteristic Late Palaeoproterozoic granites of the Transscandinavian Igneous Belt (TIB, c. 1650–1850 Ma) in the foreland Autochthon to the typical, mainly Mesoproterozoic-age profile (c. 950–1700 Ma) of the Sveconorwegian Orogen of southwestern Scandinavia in the hinterland. Late Ediacaran to Early Cambrian shallow-marine Vemdal quartzites of the Jämtlandian Nappes (Lower Allochthon) provide strong bimodal signatures with TIB (1700–1800 Ma) and Sveconorwegian, sensu stricto (900–1150 Ma) ages dominant. Mid-Ordovician turbidites (Norråker Formation) of the Lower Allochthon in Sweden, sourced from the west, have unimodal signatures dominated by Sveconorwegian ages with peaks at 1000–1100 Ma, but with subordinate components of older Mesoproterozoic zircons (1200–1650 Ma). Latest Ordovician shallow-marine quartzites also yield bimodal signatures, but are more dispersed than in the Vemdal quartzites. In the greenschist facies lower parts of the Middle Allochthon, the Fuda (Offerdal Nappe) and Särv Nappe signatures are either unimodal or bimodal (950–1100 and/or 1700–1850 Ma), with variable dominance of the younger or older group, and subordinate other Mesoproterozoic components. In the overlying, amphibolite to eclogite facies lower part of the Seve Nappe Complex, where the metasediments are dominated by feldspathic quartzites, calcsilicate-rich psammites and marbles, most units have bimodal signatures similar to the Särv Nappes, but more dispersed; one has a unimodal signature very similar to the Ordovician turbidites of the Jämtlandian Nappes. In the overlying Upper Allochthon, Lower Köli (Baltica-proximal, Virisen Terrane), Late Ordovician quartzites provide unimodal signatures dominated by Sveconorwegian ages (sensu stricto). Further north in the Scandes, previously published zircon signatures in quartzites of the Lower Allochthon are similar to the Vemdal quartzites in Jämtland. Data from the Kalak Nappes at 70°N are in no way exotic to the Sveconorwegian Baltoscandian margin. They do show a Timanian influence (ages of c. 560–610 Ma), as would be expected from the palinspastic reconstructions of the nappes. Thus the detrital zircon signatures reported here and published elsewhere provide supporting evidence for a continuation northwards of the Sveconorwegian Orogen in the Neoproterozoic, from type areas in the south, along the Baltoscandian margin of Baltica into the high Arctic.

Margin (machine learning)

10.6084/m9.figshare.3453581

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Provenance of Neoproterozoic sediments in the Särv nappes (Middle Allochthon) of the Scandinavian Caledonides: LA-ICP-MS and SIMS U–Pb dating of detrital zircons

Precambrian Research (2011)

Yaron Be’eri-Shlevin David G. Gee Stefan Claesson Anna Ladenberger Jarosław Majka

Allochthon

Laurentia

Baltic Shield

Basement

Geochronology

Baltica

10.1016/j.precamres.2011.03.007

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Citations (37)

U-Th signatures of agricultural soil at the European continental scale (GEMAS): Distribution, weathering patterns and processes controlling their concentrations

The Science of The Total Environment (2017)

Philippe Négrel Benedetto De Vivo Clemens Reimann Anna Ladenberger Domenico Cicchella

Aqua regia

Bedrock

Parent material

Lithology

Topsoil

10.1016/j.scitotenv.2017.12.005

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Citations (22)

Lead and lead isotopes in agricultural soils of Europe – The continental perspective

Applied Geochemistry (2011)

Clemens Reimann Belinda Flem Karl Fabian Manfred Birke Anna Ladenberger

Lead (geology)

10.1016/j.apgeochem.2011.12.012

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Citations (151)

REE concentrations in agricultural soil in Sweden and Italy: Comparison of weak MMI® extraction with near total extraction data

Applied Geochemistry (2015)

Martiya Sadeghi Stefano Albanese G. A. Morris Anna Ladenberger Madelen Andersson

Rare-earth element

Lithology

Bedrock

Trace element

10.1016/j.apgeochem.2015.07.004

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Citations (10)

Low density geochemical mapping and mineral exploration: application of the mineral system concept

Geochemistry Exploration Environment Analysis (2015)

Clemens Reimann Anna Ladenberger Manfred Birke Patrice de Caritat

The mineral exploration industry is used to very high sample densities (100s to 1000s of samples/km 2 ) for geochemical exploration in order to define drill targets. Lately, geoscience organizations in many countries have been geochemically mapping increasingly larger areas at progressively lower sampling densities (1 site/100 to 1 site/18 000 km 2 ). A single ore body is too small a target and cannot be expected to be discovered at such low sample densities; indeed numerous deposits could be hidden within a 100 × 100 km grid cell. However, mineral systems, which include all geological ingredients and processes necessary for the generation of mineral deposits, form much larger targets that could be identified even at such low sampling densities. Examples from some European low density geochemical surveys where patterns emerged that may have implications for mineral exploration are shown and discussed. It is concluded that low density geochemical mapping holds great promise in the early stages of mineral exploration programmes in guiding subsequent effort into the more fertile regions. Interpretation of these maps, however, may need a different approach than that used in classical, high density mapping exercises, where only ‘high values’ of certain metals are the traditional target.

Mineral exploration

10.1144/geochem2014-327

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Citations (30)

Urban soil geochemistry of two Nordic towns: Hämeenlinna and Karlstad

Journal of Geochemical Exploration (2017)

Timo Tarvainen Anna Ladenberger Jo Snöälv Jaana Jarva Madelen Andersson

Topsoil

Aqua regia

Soil test

10.1016/j.gexplo.2017.07.018

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Citations (13)