Results 91 to 100 of about 5,793 (215)

Subducted seamounts in an eclogite-facies ophiolite sequence: the Andean Raspas Complex, SW Ecuador

, 2010
The metamorphic Raspas Complex of southwest Ecuador consists of high-pressure mafic, ultramafic, and sedimentary rocks. The Lu–Hf ages of a blueschist, a metapelite, and an eclogite overlap at around 130 Ma and date high-pressure garnet growth.
Scherer, E. E., John, Timm, Herms, Petra, Halama, Ralf, Schenk, Volker, Garbe-Schönberg, C.-Dieter   +5 more
core   +1 more source

Zircons from Eclogite-Associated Rocks of the Marun–Keu Complex, the Polar Urals: Trace Elements and U–Pb Dating

Geosciences
The Marun–Keu complex plays a significant role in our understanding of the geological evolution of the Ural orogen; however, it remains poorly understood.
Laysan Salimgaraeva, Aleksey Berezin, Sergey Sergeev, Nikolai Gubanov, Ekaterina Stetskaya, Sergey Skublov   +5 more
doaj   +1 more source

Trace element behavior and P-T-t evolution during partial melting of exhumed eclogite in the North Qaidam UHPM belt (NW China): Implications for adakite genesis

, 2015
We have studied trace element behavior and timing of decompression melting of UHP rocks during exhumation recorded in the magmatic products, i.e., the melt phase (leucosomes), cumulate (garnetite) and residue (amphibolitized eclogite) from a single ...
Song , Shuguang, Zhang, Guibin, Zhang, Lifei, Song, Shuguang, Tian, Zuolin, Han, Lei, Christy, Andrew, Niu, Yaoling, Christy, Andrew G.   +8 more
core   +1 more source

Two metamorphic cycles recorded by monazite in eclogite-facies gneisses (Southern Armorican Massif, France): A Cambro-Ordovician continental crust involved in eo-Variscan subduction

BSGF - Earth Sciences Bulletin
We present U-Th/Pb data obtained for xenotime and monazite from the polycyclic eclogite-facies para- and ortho-gneisses of the Les Essarts Unit (Vendée, southern Armorican Massif, France), which have recorded an HT-LP cycle ending with a first ...
Bosse Valérie, Godard Gaston, Devidal Jean Luc, Mallens Julie, Shea Thomas   +4 more
doaj   +1 more source

Mantle plumes and flood basalts: enhanced melting from plume ascent and eclogite component

, 2015
New numerical models of starting plumes reproduce the observed volumes and rates of flood basalt eruptions, even for a plume of moderate temperature arriving under thick lithosphere.
Leitch, A M, Davies, Geoffrey
core  

Multi-stage reaction history in different eclogite types from the Pakistan Himalaya and implications for exhumation processes

, 2009
Metabasites were sampled from rock series of the subducted margin of the Indian Plate, the so-called Higher Himalayan Crystalline, in the Upper Kaghan Valley, Pakistan. These vary from corona dolerites, cropping out around Saif- ul-Muluk in the south, to
Wilke, Franziska Daniela Helena, Altenberger, Uwe (Dr.), Khan, M. Ahmed, O'Brien, Patrick (Prof. Dr.), Konrad-Schmolke, Matthias (Dr. rer. nat.), Wike, Franziska, Konrad-Schmolke, Matthias,, O'Brien, Patrick J., Altenberger, Uwe, Khan, M. A., Franziska D.H. Wilke, Patrick J. O'Brien, Uwe Altenberger, M. Ahmed Khan, Matthias Konrad-Schmolke   +14 more
core   +1 more source

Eclogite from central Yukon: a record of subduction at the western margin of ancient North America

, 1983
Eclogite occurring in central Yukon, at Faro and near Last Peak, as lenses interleaved with muscovite–quartz blastomylonite has the chemical and field characteristics of group C rocks.
Herwart Helmstaedt, Philippe Erdmer
core   +1 more source

Eclogite-facies sea-floor hydrothermally-altered rocks: calculated phase equilibria for an example from the western Alps at Servette.

, 2012
In the St. Marcel Valley at Servette in the Western Alps metabasic rocks crop out that were variably altered in a sea-floor hydrothermal system. Successively, they were metamorphosed to eclogite facies.
Powell R., REBAY, GISELLA
core  

Fluid‐Driven Mass Transfer During Retrograde Metamorphism and Exhumation of the UHP Western Gneiss Region Terrane, Norway

Geochemistry, Geophysics, Geosystems
Dehydration reactions within subducted oceanic crust are important for fluid‐mediated element transfer within the subducting plate and potentially to the mantle wedge.
D. Z. Shulaker, S. M. Gordon, J. Hammerli, J. W. DesOrmeau   +3 more
doaj   +1 more source

Oxygen isotope composition of quartz-vein in ultrahigh-pressure eclogite from Dabieshan and implication for transport of high-pressure metamorphic fluid

, 2001
The oxygen isotope composition of minerals from quartz-veins and host-eclogites in Dabieshan, China was measured in order to place geochemical constraints on the origin and transport of high-pressure metamorphic fluids. The results, along with structural
Li, Y.L., Zhou, JB, Zheng, YF, Li, YL, C.-S. Wei, Wei, C.S., Zhou, J.B., Wei, CS, Fu, B, B. Fu, Y.-L. Li, Fu, B., Zheng, Y.-F., J.-B. Zhou, Y.-F. Zheng   +14 more
core   +1 more source