Results 81 to 90 of about 5,243 (171)

Brittle Deformation During Eclogitization of Early Paleozoic Blueschist

Frontiers in Earth Science, 2020
The Tsäkkok Lens of the Scandinavian Caledonides represents the outermost Baltican margin that was subducted in late Cambrian/Early Ordovician time during closure of the Iapetus Ocean.
Michał Bukała, Michał Bukała, Christopher J. Barnes, Christopher J. Barnes, Pauline Jeanneret, Pauline Jeanneret, Károly Hidas, Károly Hidas, Stanisław Mazur, Bjarne S. G. Almqvist, Karolina Kośmińska, Iwona Klonowska, Iwona Klonowska, Juraj Šurka, Jarosław Majka, Jarosław Majka   +15 more
doaj   +1 more source

Cold Deep Over Hot Shallow Crust: A Peculiar Metamorphic Architecture in the Neoarchean Metasedimentary Pontiac Subprovince, Superior Craton (Canada)

Journal of Metamorphic Geology, Volume 43, Issue 2, Page 191-224, February 2025.
ABSTRACT The Neoarchean Era is a key period in Earth's history as it witnessed a significant pulse of crustal formation corresponding to the assembly of several cratons, potentially coeval with a transition in the global tectonic regime. Neoarchean metasedimentary subprovinces of the Superior Craton, the largest unreworked Archean craton on Earth, were
Isaac S. Malta, Carl Guilmette, Antoine Godet, Douglas K. Tinkham, Bruna Coldebella, Georges Beaudoin, Crystal LaFlamme, Taus R. C. Jørgensen, Jeffrey H. Marsh   +8 more
wiley   +1 more source

Pedogenic continental red beds: How, why and when red? Redox geochemistry and quantitative colour analysis of the Old Red Sandstone, South Wales, UK

Sedimentology, Volume 72, Issue 2, Page 442-474, February 2025.
ABSTRACT Continental red beds are coloured by secondary Fe(III)‐oxy‐hydroxides (mainly hematite) which makes them excellent archives of ancient near‐surface redox conditions. However, colour is often treated as a subjective physical property, and opinions differ widely as to the environment and timing of colouration of the red beds. This study utilizes
Ondřej Bábek, Lukáš Ackerman, Daniel Šimíček, V. Paul Wright, Susan Marriott, Tomáš Pluháček, Salahaddin Shahrokhi, Hedvika Weinerová   +7 more
wiley   +1 more source

Re-evaluating the sub-Caledonian erosion surface at the border of the Caledonides in Enontekiö Lapland, north-western Finland

Fennia: International Journal of Geography, 1985
The sub‑Caledonian erosion surface in the northwesternmost tip of Finland lies almost horizontal under the Finnish Caledonides. In its most easterly part, east of the Valtijoki River, the erosion surface was assumed to be located in an elevated position.
Jyrki J. Lehtovaara
doaj  

The North Sea rift basement records extensional collapse of the Caledonian orogen

Communications Earth & Environment
Our knowledge of crystalline basement rocks flooring continental rift basins, rifted margin deposits, and foreland basins is poor, yet important for understanding basin evolution, crustal heat production, petroleum maturation, and for offshore mineral ...
Haakon Fossen, Israel Polonio, Marit Stokke Bauck, Carolina Cavalcante   +3 more
doaj   +1 more source

Refined model of incremental emplacement based on structural evidence from the granodioritic Newry igneous complex, Northern Ireland [PDF]

, 2017
Although many intrusions are now known to have been incrementally emplaced, the mechanisms through which this takes place are generally poorly understood.
Anderson, P. E., Cooper, M. R., Ellam, R. M., Hurley, C. T., Inman, J., Meighan,I. G., Reavy, R. John, Stevenson, C. T.   +7 more
core   +2 more sources

The Lyngen Gabbro: the lower crust of an Ordovician Incipient-Arc [PDF]

, 2004
We present evidence for the origin of the Lyngen Gabbro of the Ordovician Lyngen Magmatic Complex in Troms, Northern Norway. The two magmatic suites of the Lyngen Gabbro strike parallel NNE-SSW, and have distinct magmatic signatures.
Kvassnes, Astri J. S., Moen-Eikeland, Heidi, Pedersen, Rolf Birger, Strand, Anita H.   +3 more
core   +1 more source

Utilizing the International Geo Sample Number Concept in Continental Scientific Drilling During ICDP Expedition COSC-1

Data Science Journal, 2017
The International Geo Sample Number (IGSN) is a globally unique persistent identifier (PID) for physical samples that provides discovery functionality of digital sample descriptions via the internet.
Ronald Conze, Henning Lorenz, Damian Ulbricht, Kirsten Elger, Thomas Gorgas   +4 more
doaj   +1 more source

Stratabound arsenic and vein antimony mineralisation in Silurian greywackes at Glendinning, south Scotland [PDF]

, 1983
Stratiform and disseminated pyrite-arsenopyrite concentrations are overprinted by fracturecontrolled polymetallic mineralisation including stibnite through at least tens of metres of Silurian sediments at Glendinning, near Langholm.
Gallagher, M.J., Hills, M.G., Jones, R.C., Kemp, A.E.S., Parker, M.E., Peachey, D., Rollin, K.E., Skilton, B.R.H., Smith, R.T., Stone, P., Vickers, B.P.   +10 more
core  

Transpressive dextral shear in the Italva-Itaperuna section, Northern State of Rio de Janeiro, Brazil [PDF]

, 2008
Structural analysis carried out on a segment of the Neoproterozoic Ribeira Belt, southeastern Brazil, show that it represents part of the transpressive dextral orogen related to the Central Mantiqueira Province.
DEHLER, Nolan M., KARNIOL, Tiago R., Machado, Rômulo   +2 more
core   +2 more sources