Tonny B. Thomsen
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View article: Chronicles in ivory: estimating the age of narwhals (Monodon monoceros) through stochastic modeling of seasonally varying trace elements
Chronicles in ivory: estimating the age of narwhals (Monodon monoceros) through stochastic modeling of seasonally varying trace elements Open
Introduction Age estimation is an important tool for understanding the life history of animal populations, and several techniques have been developed, each with its own strengths and limitations. Methods In this study, we apply a novel age…
View article: Genomic evidence for fisheries-induced evolution in Eastern Baltic cod
Genomic evidence for fisheries-induced evolution in Eastern Baltic cod Open
Overfishing is one human-driven perturbation driving major evolutionary pressure on marine populations. Fishing is often highly selective for particular traits and elicits marked phenotypic changes, while the evolutionary basis of such tra…
View article: Mixing, Mingling and Metasomatism: Magmatic and Hydro-Carbothermal Processes in an Angolan Subvolcanic Alkaline Complex
Mixing, Mingling and Metasomatism: Magmatic and Hydro-Carbothermal Processes in an Angolan Subvolcanic Alkaline Complex Open
View article: Cassiterite in granite, granitic pegmatites, greisen and hydrothermal veins, the Bugarura-Kuluti Nb-Ta-Sn deposit, Karagwe-Ankole Belt, Rwanda: petrography and chemical composition
Cassiterite in granite, granitic pegmatites, greisen and hydrothermal veins, the Bugarura-Kuluti Nb-Ta-Sn deposit, Karagwe-Ankole Belt, Rwanda: petrography and chemical composition Open
View article: Into the wild: coupling otolith and archival tag records to test assumptions underpinning otolith chemistry applications in wild fish
Into the wild: coupling otolith and archival tag records to test assumptions underpinning otolith chemistry applications in wild fish Open
Chronological records of elemental concentrations in fish otoliths are a widely used tool to infer the environmental conditions experienced by individual fish. To interpret elemental signals within the otolith, it is important to understan…
View article: Deglaciation of northwestern Greenland during Marine Isotope Stage 11
Deglaciation of northwestern Greenland during Marine Isotope Stage 11 Open
Past interglacial climates with smaller ice sheets offer analogs for ice sheet response to future warming and contributions to sea level rise; however, well-dated geologic records from formerly ice-free areas are rare. Here we report that …
View article: Issue Information
Issue Information Open
Aims and ScopeTerra Nova publishes short, innovative and provocative papers of interest to a wide readership and covering the broadest spectrum of the Solid Earth and Planetary Sciences.Terra Nova encompasses geology, geophysics
View article: The Malolotsha Klippe: Large-Scale Subhorizontal Tectonics Along the Southern Margin of the Archean Barberton Greenstone Belt, Eswatini
The Malolotsha Klippe: Large-Scale Subhorizontal Tectonics Along the Southern Margin of the Archean Barberton Greenstone Belt, Eswatini Open
Whether Archean tectonics were horizontally or vertically dominated is controversially discussed because arguments bear on the kinematics and thermal state of the Archean mantle and constrain the mode of formation of the earliest continent…
View article: The Newly Discovered Attu Carbonatite of West Greenland: A Mesoproterozoic Dyke Intrusion Enriched in Sr-Ba-Ree Minerals
The Newly Discovered Attu Carbonatite of West Greenland: A Mesoproterozoic Dyke Intrusion Enriched in Sr-Ba-Ree Minerals Open
View article: Geological processes defining the formation of plumasite-type corundum in the Paleoproterozoic Isertoq Terrane, South-East Greenland
Geological processes defining the formation of plumasite-type corundum in the Paleoproterozoic Isertoq Terrane, South-East Greenland Open
View article: The Malolotsha Klippe: Large‐Scale Subhorizontal Tectonics Along the Southern Margin of the Archean Barberton Greenstone Belt, Eswatini
The Malolotsha Klippe: Large‐Scale Subhorizontal Tectonics Along the Southern Margin of the Archean Barberton Greenstone Belt, Eswatini Open
Whether Archean tectonics were horizontally or vertically dominated is controversially discussed because arguments bear on the kinematics and thermal state of the Archean mantle and constrain the mode of formation of the earliest continent…
View article: Maturity Matters in Provenance Analysis: Mineralogical Differences Explained by Sediment Transport from Fennoscandian and Variscan Sources
Maturity Matters in Provenance Analysis: Mineralogical Differences Explained by Sediment Transport from Fennoscandian and Variscan Sources Open
The significance of mineralogical maturity as a provenance indicator has long been debated and we use this study to demonstrate that it can indeed be a powerful tool to track the distribution of sandstone reservoirs. We investigate the cau…
View article: Eyes and ears: A comparative approach linking the chemical composition of cod otoliths and eye lenses
Eyes and ears: A comparative approach linking the chemical composition of cod otoliths and eye lenses Open
Fish eye lenses are a protein‐based chronological recorder of microchemical constituents that are a potentially useful tool for interpretations of environmental, ecological and life‐history experienced by fish. Here, we present the first s…
View article: U-Pb zircon and titanite age of the Christiansø granite, Ertholmene, Denmark, and correlation with other Bornholm granitoids
U-Pb zircon and titanite age of the Christiansø granite, Ertholmene, Denmark, and correlation with other Bornholm granitoids Open
A granitic sample from the Danish island of Christiansø in the Ertholmene island group north of Bornholm is described petrographically and geochemically, and dated using U-Pb in zircon and titanite. Zircon systematics in the sample are com…
View article: Metal compositions of carbonaceous chondrites
Metal compositions of carbonaceous chondrites Open
View article: Lifetime residency of capelin (Mallotus villosus) in West Greenland revealed by temporal patterns in otolith microchemistry
Lifetime residency of capelin (Mallotus villosus) in West Greenland revealed by temporal patterns in otolith microchemistry Open
View article: Permian to Cretaceous granites and felsic volcanics from SW Vietnam and S Cambodia: Implications for tectonic development of Indochina
Permian to Cretaceous granites and felsic volcanics from SW Vietnam and S Cambodia: Implications for tectonic development of Indochina Open
Zircon ages and geochemistry are presented for igneous rocks from SW Vietnam and S Cambodia. Four main age groupings occur: Cretaceous (107–75 Ma), Early Jurassic (195 Ma), Late Triassic (230–222 Ma), and Permian (294–265 Ma). Cretaceous a…
View article: Where do you come from, where do you go: early life stage drift and migrations of cod inferred from otolith microchemistry and genetic population assignment
Where do you come from, where do you go: early life stage drift and migrations of cod inferred from otolith microchemistry and genetic population assignment Open
This study investigates stock mixing of genetically distinct Atlantic cod (Gadus morhua) stocks in the Kattegat, an area geographically located between the North Sea and the Baltic Sea, by combining genetic population identification with h…
View article: It’s elemental, my dear Watson: validating seasonal patterns in otolith chemical chronologies
It’s elemental, my dear Watson: validating seasonal patterns in otolith chemical chronologies Open
Accurate age data are essential for reliable fish stock assessment. Yet many stocks suffer from inconsistencies in age interpretation. A new approach to obtain age makes use of the chemical composition of otoliths. This study validates the…
View article: Test of vegetation-based surface exploration for detection of Arctic mineralizations: The deep buried Kangerluarsuk Zn-Pb-Ag anomaly
Test of vegetation-based surface exploration for detection of Arctic mineralizations: The deep buried Kangerluarsuk Zn-Pb-Ag anomaly Open
View article: Detrital mineral composition and provenance of the Camp Century basal ice sediments
Detrital mineral composition and provenance of the Camp Century basal ice sediments Open
<p>The Camp Century Ice core, NW Greenland, recovered a 4.5 m basal section consisting of frozen sediments and debris-rich ice. This material was recently re-discovered in Danish ice core storage and visually logged. As part of a mul…
View article: Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas: A review with new data
Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas: A review with new data Open
View article: Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand
Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand Open
Major/trace element compositions as well as Sr-Nd-Hf-Pb isotopic compositions of amphibole megacrysts hosted by intraplate lamprophyric magmatism in New Zealand (data from the Alpine Dike Swarm and Westland Dike Swarm). Detailed descriptio…
View article: Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand
Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand Open
Major/trace element compositions as well as Sr-Nd-Hf-Pb isotopic compositions of amphibole megacrysts hosted by intraplate lamprophyric magmatism in New Zealand (data from the Alpine Dike Swarm and Westland Dike Swarm). Detailed descriptio…
View article: Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand
Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand Open
Major/trace element compositions as well as Sr-Nd-Hf-Pb isotopic compositions of amphibole megacrysts hosted by intraplate lamprophyric magmatism in New Zealand (data from the Alpine Dike Swarm and Westland Dike Swarm). Detailed descriptio…
View article: Camp Century Basal Sediment Revisited: A Multi-Parameter Geochemical Analysis, Northwest Greenland
Camp Century Basal Sediment Revisited: A Multi-Parameter Geochemical Analysis, Northwest Greenland Open
View article: Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand
Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand Open
Major/trace element compositions as well as Sr-Nd-Hf-Pb isotopic compositions of amphibole megacrysts hosted by intraplate lamprophyric magmatism in New Zealand (data from the Alpine Dike Swarm and Westland Dike Swarm). Detailed descriptio…
View article: Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand
Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand Open
Major/trace element compositions as well as Sr-Nd-Hf-Pb isotopic compositions of amphibole megacrysts hosted by intraplate lamprophyric magmatism in New Zealand (data from the Alpine Dike Swarm and Westland Dike Swarm). Detailed descriptio…
View article: Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand
Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand Open
Major/trace element compositions as well as Sr-Nd-Hf-Pb isotopic compositions of amphibole megacrysts hosted by intraplate lamprophyric magmatism in New Zealand (data from the Alpine Dike Swarm and Westland Dike Swarm). Detailed descriptio…
View article: Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand
Geochemical dataset of amphibole megacrysts and microphenocrysts hosted by lamprophyric dikes in southern New Zealand Open
Major/trace element compositions as well as Sr-Nd-Hf-Pb isotopic compositions of amphibole megacrysts hosted by intraplate lamprophyric magmatism in New Zealand (data from the Alpine Dike Swarm and Westland Dike Swarm). Detailed descriptio…