Multi-isotope tracing of the 1.3–0.9 Ga evolution of Fennoscandia; crustal growth during the Sveconorwegian orogeny

Autor: Steinar Halvdan Hansen Møkkelgjerd, Nolwenn Coint, Graham Hagen-Peter, Christopher L. Kirkland, Trond Slagstad, Torkil S. Røhr, Nick M.W. Roberts, Bjørn Eske Sørensen, Anette Granseth

Publikováno v: Gondwana Research

Magmatism between 1.3 and 0.9 Ga at the southwestern margin of Fennoscandia, comprising mainly granitic batholiths and subordinate bimodal volcanic rocks, provides a nearly continuous magmatic record of the Fennoscandian tectonic evolution. Here, we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35176a3a7aa4505020cde22619dc0924
https://doi.org/10.1016/j.gr.2020.10.019

Extreme enriched and heterogeneous 87Sr/86Sr ratios recorded in magmatic plagioclase from the Samoan hotspot

Autor: Jason Harvey, Bradley R. Hacker, Christy B. Till, Graham Hagen-Peter, Frank J. Spera, John M. Cottle, Gareth G.E. Seward, M. A. Edwards, Jenna V. Adams, Andrew R.C. Kylander-Clark, Matthew G. Jackson

Publikováno v: Edwards, M A, Jackson, M G, Kylander-Clark, A R C, Harvey, J, Hagen-Peter, G A, Seward, G G E, Till, C B, Adams, J V, Cottle, J M, Hacker, B R & Spera, F J 2019, ' Extreme enriched and heterogeneous 87 Sr/ 86 Sr ratios recorded in magmatic plagioclase from the Samoan hotspot ', Earth and Planetary Science Letters, vol. 511, pp. 190-201 . https://doi.org/10.1016/j.epsl.2019.01.040

We report the major-element, trace-element, and 87 Sr/ 86 Sr compositions of six plagioclase crystals from two Samoan lavas with extreme EM2 isotopic compositions (ALIA-115-18 with whole-rock 87 Sr/ 86 Sr of 0.718592, and ALIA-115-21 with whole-rock

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9318c742e94007e1ef7038615e2f9625
https://doi.org/10.1016/j.epsl.2019.01.040

A mantle plume origin for the Scandinavian Dyke Complex: a 'piercing point' for 615 Ma plate reconstruction of Baltica?

Autor: Trond H. Torsvik, Sverre Planke, Eric Brown, Christian Tegner, Torgeir B. Andersen, Hans Jørgen Kjøll, Graham Hagen-Peter, Fernando Corfu

The origin of Large Igneous Provinces (LIPs) associated with continental breakup and the reconstruction of continents older than c. 320 million years (pre-Pangea) are contentious research problems. Here we study the petrology of a 615 - 590 Myr doler

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2f2bf29ddf7850d57fdc57c823b94ecd
https://doi.org/10.5194/egusphere-egu21-4119

Non-destructive identification of surface enrichment and trace element fractionation in ancient silver coins

Autor: Thomas Birch, Charles E. Lesher, Mahir Hrnjic, Søren M. Sindbæk, Graham Hagen-Peter, Gry H. Barfod

Publikováno v: Hrnjic, M, Hagen-Peter, G A, Birch, T, Barfod, G H, Sindbæk, S M & Lesher, C 2020, ' Non-destructive identification of surface enrichment and trace element fractionation in ancient silver coins ', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 478, pp. 11-20 . https://doi.org/10.1016/j.nimb.2020.05.019
Hrnjić, M, Hagen-Peter, G A, Birch, T, Barfod, G H, Sindbæk, S M & Lesher, C E 2020, ' Non-destructive identification of surface enrichment and trace element fractionation in ancient silver coins ', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 478, pp. 11-20 . https://doi.org/10.1016/j.nimb.2020.05.019

A common issue in non-destructive surface analysis of historical silver coins is depletion of Cu from the near-surface areas, which in turn results in higher Ag content at a coin’s surface. This paper reports a non-destructive analytical strategy u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7e402c17c92c522beb447ec1fa399b3
https://pure.au.dk/ws/files/231111079/Non_destructive_identification_of_surface_enrichment_and_trace_element_fractionation_in_ancient_silver_coins_Accepted_manuscript_2020.pdf

Strontium isotope systematics for plagioclase of the Skaergaard intrusion (East Greenland):A window to crustal assimilation, differentiation, and magma dynamics

Autor: Graham Hagen-Peter, Charles E. Lesher, Christian Tegner

Publikováno v: Hagen-Peter, G, Tegner, C & Lesher, C E 2019, ' Strontium isotope systematics for plagioclase of the Skaergaard intrusion (East Greenland) : A window to crustal assimilation, differentiation, and magma dynamics ', Geology, vol. 47, no. 4, pp. 313-316 . https://doi.org/10.1130/G45639.1
Geology, vol 47, iss 4

We present in situ laser ablation-multicollector-inductively coupled plasma-mass spectrometry Sr isotope data for plagioclase from a reference stratigraphic profile of the entire Layered Series and Upper Border Series of the Skaergaard intrusion (Eas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::005ff4822ad924228ffebe06fff49739
https://pure.au.dk/portal/da/publications/strontium-isotope-systematics-for-plagioclase-of-the-skaergaard-intrusion-east-greenland(43ea1a94-fdfa-44f5-b3dd-52632b85fd1b).html