Results 81 to 90 of about 3,223 (190)

Ordovician and Silurian igneous rocks and orthogeneisses in the Catalonian Coastel Ranges [PDF]

, 1990
These rocks exhibit calc-alkaline affinities and may have originated by partial melting of the crust in a post-collision, anorogenic setting. Orthogneisses derived from biotite-bearing leucogranites occur within aprobably cambrian heterogeneous series ...
Gil Ibarguchi, José Ignacio, Navidad, M., Ortega Cuesta, Luis Ángel   +2 more
core   +1 more source

Dioctahedral mixed K-Na-micas and paragonite in diagenetic to low-temperature metamorphic terrains: bulk rock chemical, thermodynamic and textural constraints [PDF]

, 2008
Metamorphic mineral assemblages in low-temperature metaclastic rocks often contain paragonite and/or its precursor metastable phase (mixed K-Na-white mica).
Alt J.C., Bucher K., Chamley H., Chatterjee N.D., Coggon R., Connolly J.A.D., Connolly J.A.D., Darken L.S., Degens E.T., Foster M.D., Frey M., Frey M., Frey M., Frey M., Frey M., Guidotti C.V., Guidotti C.V., Holland T.J.B., Holland T.J.B., Jiang W.-T., Kenneth J. T. Livi, Kisch H.J., Koroknai B., Korzhinskii D.S., Li G., Livi K.J.T., Livi K.J.T., Livi K.J.T., Loughnan F.C., Merriman R.J., Merriman R.J., Merriman R.J., Merriman R.J., Merriman R.J., Millot G., Powell R., Powell R., Price J.R., Proyer A., Péter Horváth, Péter Árkai, Siivola J., Thompson A.B., Thompson J.B., Thompson J.B., Thompson J.B., Weaver C.E., Winkler H.G.F., Zen E.-A., Árkai P., Árkai P., Árkai P., Árkai P., Árkai P., Árkai P., Árkai P., Árkai P., Árkai P.   +57 more
core   +1 more source

Neoproterozoic protolith forming and late Neoproterozoic-Cambrian granulite-facies metamorphism in the northeastern Lützow-Holm Complex, East Antarctica: Implications for P-T-t evolution of Gondwana fragments [PDF]

, 2017
第8回極域科学シンポジウム/個別セッション：[OG] 極域地圏12月5日（火）国立極地研究所 1階交流アトリウムThe Eighth Symposium on Polar Science/Ordinary sessions: [OG] Polar GeosciencesTue.
堤 之恭, 角替 敏昭, 高村 悠介
core   +1 more source

Experimental constraints on amphibole stability in primitive alkaline and calc-alkaline magmas [PDF]

, 2017
Equilibrium crystallization experiments were carried out on two primitive basaltic rocks (APR16: Na2O+K2O=4.40 wt%; CM42: Na2O+K2O=2.59 wt%) with the aim to investigate the amphibole stability in the differentiation processes at deep crustal level, of
Bonechi, Barbara, Gaeta, Mario, Granati, Serena F., Perinelli, Cristina, Tecchiato, Vanni   +4 more
core   +1 more source

Metabasites from the KTB Oberpfalz target area, Bavaria - geochemical characteristics and examples of mobile behaviour of "immobile" elements [PDF]

, 1989
No abstract ...
Okrusch, Martin, Richter, P., Schüssler, Ulrich   +2 more
core  

Tectonic overview of the West Gondwana margin [PDF]

, 2008
The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and Victoria Land to Eastern Australia is one of the longest and longest-lived active continental ...
Pankhurst, Robert J., Vaughan, Alan P.M.
core   +1 more source

The role of continental subduction in mantle metasomatism and carbon recycling revealed by melt inclusions in UHP eclogites. [PDF]

Sci Adv, 2023
Borghini A, Nicoli G, Ferrero S, O'Brien PJ, Laurent O, Remusat L, Borghini G, Milani S.   +7 more
europepmc   +1 more source

Geochemical and Isotopic Characteristics of the Protolith of Eclogites from the North Shahrekord Metamorphic Complex: Evidence of Late Neoproterozoic Back-arc Basin development in Sanandaj-Sirjan Zone

Journal of Economic Geology, 2019
Introduction All of the major tectonic zones of Iran, except for the Kopet-Dagh, contain Pan-African crystalline basement. Subduction of the Proto-Tethys at about 630 Ma caused Cadomian arc– and backarc magmatism in the northern margin of Gondwana ...
Forough Malek Mahmoudi, Ali Reza Davoudian Dehkordy, Nahid Shabanian Boroujeni, Hossein Azizi   +3 more
doaj   +1 more source

A re-evaluation of the peak P-T conditions of eclogite-facies metamorphism of the Paleozoic Acatlán Complex (Mexico) reveals deeper subduction. [PDF]

Sci Rep, 2022
Hernández-Uribe D.
europepmc   +1 more source

Natural geochemical risk in the Pollino Massif: a case-study of chromium

Frontiers in Genetics, 2015
The geochemical risk linked to heavy metal contamination of soils and waters, commonly associated with anthropogenic causes, may, however, be linked to the presence of rocks and soils that naturally contain these metals.
Priscilla Boccia, Salvatore Margiotta
doaj   +1 more source