Results 161 to 170 of about 7,142 (220)

A Scottish provenance for the Altar Stone of Stonehenge. [PDF]

Nature
Clarke AJI, Kirkland CL, Bevins RE, Pearce NJG, Glorie S, Ixer RA.   +5 more
europepmc   +1 more source

Tracing contamination in mining areas through sulfur and oxygen isotopes in groundwater sulfates: a case study from the Apuan Alps (Italy). [PDF]

Environ Geochem Health
Natali S, Franceschi L, Giannecchini R, D'Orazio M, Delgado-Huertas A, Zanchetta G, Doveri M.   +6 more
europepmc   +1 more source

Impact of sub-basalt thrust systems on the Faroe continental shelf for the late Paleoproterozoic-Cenozoic tectonic evolution of the margin. [PDF]

Open Res Eur
Koehl JP, Jolley DW, Peace AL, Muñoz-Barrera JM, Foulger GR.   +4 more
europepmc   +1 more source

Complete genomes reveal the full extent of Mycobacterium tuberculosis complex diversity across evolutionary scales

García-Marín AM, Torres-Puente M, Martínez-Priego L, De Marco G, Moreno-Molina M, Hunt M, Iqbal Z, Gil-Brusola A, Valencia Region TB Working Group, López MG, González-Candelas F, Alonso-del-Real J, Comas I.   +12 more
europepmc   +1 more source

Variscan-late Variscan-early Alpine progressive extensional collapse of central Spain

Geodinamica Acta, 1994
AbstractThe Variscan—late Variscan—early Alpine evolution of Central Spain is characterized by a progressive transition from dominant compressional conditions, towards a generalized extensional regime. This evolution involved four tectonomag-matic stages: 1) a Dl Variscan stage, associated to widespread compression with E-vergent structural elements ...
MIGUEL Doblas, R Capote, R Lunar
exaly   +2 more sources

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Magnetic fabrics in Portuguese Variscan granites: structural markers of the Variscan orogeny

2020
<p>This work focuses on the magnetic fabric of 20 variscan granitic massifs from northern and central Portugal and considers the Anisotropy of Magnetic Susceptibility (AMS) results obtained in about 750 sampling sites. In the northern and central Portugal, three main ductile deformation phases were recognized and described: D&
Helena Sant Ovaia, Ana Gonçalves, Claudia Cruz, Fernando Noronha   +3 more
openaire   +1 more source

Granites and the nature of the Variscan Crust

Elements
Unlike the neighbouring cratonic crust, the orogenic crust of the European Variscan belt is granite-rich and seldom has a mafic lower layer. In this work, we compiled a database of ca. 1500 plutons, classified by type, to elucidate the evolution of the Belt and the origin of this uncommon crust.
Jean-François Moyen, Alexandra Guy, Patrizia Fiannacca, Vojtech Janoušek, Carlos Villaseca, Puy Ayarza Arribas   +5 more
openaire   +2 more sources

Are the oroclines of the Variscan belt related to late Variscan strike‐slip tectonics?

Terra Nova, 2011
Terra Nova, 23, 241–247, 2011AbstractEarly Variscan structures and magnetic anomalies delineate four oroclines along the Variscan belt. The arcs bend the lithostratigraphic zones of the autochthon and the allochthonous terranes, which include ophiolites of the Rheic suture and units of Gondwanan derivation subducted on both sides of the Rheic Ocean.
openaire   +1 more source

Variscan extension in the Pyrenees

Tectonics, 1992
Evidence for Variscan extension in the Pyrenees is summarized and used with other geological and geochronological data to reconstruct the Variscan extensional geometry and kinematics at a crustal scale. A regionally consistent pattern of ESE‐WNW trending synmetamorphic stretching directions indicates Variscan extension roughly parallel to the present ...
openaire   +1 more source

Metallogenesis in the French part of the Variscan orogen. Part I: U preconcentrations in pre-Variscan and Variscan formations — a comparison with Sn, W and Au

Tectonophysics, 1990
Abstract In the French part of the Variscan orogen, the pre-Variscan metamorphic rocks and the Variscan granites resulting from pure crustal recycling are enriched in uranium and tin. Data on tungsten and gold are too scarce for a reasonable estimation of the average concentrations of these elements to be obtained. The spatial distribution of uranium
Michel Cuney, Marc Friedrich, Philippe Blumenfeld, Anne Bourguignon, Marie Christine Boiron, Jean Louis Vigneresse, Bernard Poty   +6 more
openaire   +1 more source