Results 31 to 40 of about 2,637,113 (187)

Decompressional equilibration of the Midsund granulite from Otrøy, Western Gneiss Region, Norway

Geologica Carpathica, 2019
The Western Gneiss Region (WGR) of the Scandinavian Caledonides is an archetypal terrain for high-pressure (HP) and ultrahigh-pressure (UHP) metamorphism. However, the vast majority of lithologies occurring there bear no, or only limited, evidence for HP
Holmberg Johanna, Bukała Michał, Jeanneret Pauline, Klonowska Iwona, Majka Jarosław   +4 more
doaj   +1 more source

Deep subduction of felsic rocks hosting UHP lenses in the central Saxonian Erzgebirge: Implications for UHP terrane exhumation [PDF]

, 2020
Contrasting metamorphic conditions determined by chemical geothermobarometric investigations of ultrahigh-pressure (UHP) lenses surrounded by high-pressure (HP) and medium-pressure (MP) felsic country rocks are an enigmatic feature of UHP terranes.

core   +1 more source

Is quartz a potential indicator of ultrahigh-pressure metamorphism? Laser Raman spectroscopy of quartz inclusions in ultrahigh-pressure garnets [PDF]

European Journal of Mineralogy, 2010
Laser Raman microspectroscopy was applied to quartz inclusions in coesite- and diamond-grade metapelites from the Kokchetav ultrahigh-pressure metamorphic (UHPM) complex, Northern Kazakhstan, and diamond-grade eclogite xenoliths from the Mir kimberlite pipe, Yakutiya, Russia to assess the quantitative correlation between the Raman frequency shift and ...
Korsakov, Andrey V., Perraki, Maria, Zhukov, Vladimir P., De Gussem, Kris, Vandenabeele, Peter, Tomilenko, Anatoly A.   +5 more
openaire   +2 more sources

Metamorphism and geochronology of the spinel−cordierite granulite in the Mirror Peninsula, East Antarctica

Dizhi lixue xuebao, 2023
Objective  The Prydz Bay belt in East Antarctica recorded two significant tectono-thermal events, the Grenvillian event and the Pan-African event, which are considered to be closely related to the evolution of the Rodinia and Gondwana supercontinents ...
LIU Xinshu, WANG Wei-(RZ), BAO Hong, GONG Tingnan, ZHAN Liqing, LIU Xiaochun, ZHAO Yue   +6 more
doaj   +1 more source

Petrochronology of himalayan ultrahigh-pressure eclogite

, 2013
The timing and nature of the India-Asia collision, Earth's largest ongoing continent-continent collisional orogen, are unclear. Ultrahigh-pressure metamorphism of Indian continental margin rocks is used as a proxy for initial collision because it ...
Menold, Carrie A., Donaldson, Dennis G., Hacker, Bradley R., Kylander-Clark, Andrew R C, Webb, A. Alexander G   +4 more
core   +1 more source

Protoliths and metamorphism of the central Himalayan eclogites: Zircon/titanite U–Pb geochronology, Hf isotope and geochemistry [PDF]

, 2022
The high-pressure (HP) eclogites in the central Himalaya provide insights into the metamorphism and exhumation history of crustal material beneath the Tibetan plateau.
Tian, Zuolin, Zhang, Liangliang, Dong, Xin, Niu, Yaoling, Zhang, Zeming, Zeming Zhang, Liangliang Zhang, Zuolin Tian, Yaoling Niu, Xin Dong   +9 more
core   +1 more source

Tracking the exhumation of a Pliocene (U)HP terrane: U‐Pb and trace‐element constraints from zircon, D'Entrecasteaux Islands, Papua New Guinea

Geochemistry, Geophysics, Geosystems, 2014
Domal structures within the D'Entrecasteaux Islands of eastern Papua New Guinea expose ultrahigh‐pressure (UHP) Pliocene (5.6–4.6 Ma) eclogites and evidence for partial melting.
Joel W. DesOrmeau, Stacia M. Gordon, Timothy A. Little, Samuel A. Bowring   +3 more
doaj   +1 more source

Scandian Ultrahigh-Pressure Metamorphism of Proterozoic Basement Rocks on Fjortoft and Otroy, Western Gneiss Region, Norway

, 2006
Electron microprobe mineral composition data are presented for samples of exsolved and recrystallized garnet websterites within the mantle-derived peridotite bodies and of external orthopyroxene eclogite lenses directly enclosed within the gneisses on ...
Wiggers de Vries, D.F., D. A. Carswell, H. L.M. van Roermund, D. F.Wiggers de Vries, Carswell, D.A., van Roermund, H.L.M.   +5 more
core   +1 more source

Geochemical Characteristics of Metasediment—Rich Lower Continental Crust: Insights From the Ivrea‐Verbano Zone (DIVE Drilling Project, ICDP Expedition 5071, Val d’Ossola, Italy)

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 11, November 2026.
Abstract Whole‐rock geochemical data from two drill cores obtained through the ICDP (International Continental Scientific Drilling Program) funded Drilling the Ivrea‐Verbano Zone (IVZ) (DIVE) project: 5071_1_B (Ornavasso) and 5071_1_A (Megolo), provide new insights into the composition of the lower continental crust (LCC) in the IVZ. Borehole 5071_1_B (
Alexia Secrétan, Othmar Müntener, Benjamin Klein, Sarah Degen, Luca Pacchiega, Junjian Li, Mattia Pistone, Kim Lemke, György Hetényi, Jörg Hermann   +9 more
wiley   +1 more source

Provenance of the Middle‐Upper Triassic Songpan‐Ganzi Flysch of Western China Revealed by Anisotropy of Magnetic Susceptibility Measurements: Implications for the Tectonic‐Paleogeographic Evolution of the Paleo‐Tethys Ocean

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The Triassic Songpan‐Ganzi turbidite complex (SGC) on the eastern Tibetan plateau is one of the largest flysch turbiditic complexes on Earth. However, the provenance of its extremely thick turbidites is hotly debated. We conducted the measurement of anisotropy of magnetic susceptibility (AMS) of Triassic turbidites from nine profiles in Ruo ...
Yuhan Yang, Yong Cao, Xiaozhou Ye, Zhenyu Yang, Zhiming Sun, Haibing Li   +5 more
wiley   +1 more source