Results 41 to 50 of about 1,650 (203)

Rapid Slab Rollback Drives Early Cretaceous Back‐Arc Extension in NE China: Implication for Crustal Growth and Episodic Porphyry Mineralization

Geochemistry, Geophysics, Geosystems
The subduction of the Paleo‐Pacific Plate beneath the NE Asian continental margin induced extensive magmatism, providing an excellent opportunity to investigate the interplay between plate dynamics, arc magmatism, continental crust formation, and ...
Honghui Wang, Xinghua Ma, Simon A. Wilde, Yong Lai, Zhenhua Zhou, Jinyu Yan   +5 more
doaj   +1 more source

Temporospatial variation in the late Mesozoic volcanism in southeast China [PDF]

Solid Earth, 2019
The magmatism (including volcanism) in East Asia (or China) could provide key clues and age constraints for the subduction and dynamical process of the Paleo-Pacific Plate. Although many absolute isotope ages of extrusive rocks have been published in the
X. Li, X. Li, Y. Li, J. Wang, C. Zhang, Y. Wang, L. Liu   +6 more
doaj   +1 more source

Petrogenesis and tectonic setting of an basalt-Trachyte-Rhyolite suite in the Spilli area (south of Siahkal), north of Iran: evidences of continental rift-related bimodal magmatism in Alborz [PDF]

پترولوژی, 2016
The spilli volcanic rocks suite consisting of Basalt- Trachyte- Rhyolite with upper Cretaceous, outcrop in the northern part of Alborz and south of Siahkal area (east of the Guilan province).
Shahrooz Haghnazar, Zahra Shafeie, Zahra Sharghy   +2 more
doaj  

Geochronology and Sr–Nd–Hf isotope constraints on the petrogenesis of teschenites from the type-locality in the Outer Western Carpathians

Geologica Carpathica, 2019
The Teschenite Association Rocks (TAR) in the Outer Western Carpathian (OWC) flysch form a classic suite of alkaline intrusions where teschenite and picrite were first defined. They represent continental intraplate volcanism that produced a wide range of
Brunarska Irena, Anczkiewicz Robert
doaj   +1 more source

The Chuacús Metamorphic Complex, central Guatemala: geochronological and geochemical constraints on its Paleozoic - Mesozoic evolution

Geologica Acta, 2011
The Chuacús Metamorphic Complex is located in Central Guatemala, between the Polochic and Motagua fault zones. It is made up of complexly intercalated, mafic and felsic high-grade gneisses, amphibolites, pelitic and quartzofeldsphatic metasediments and ...
L.A. SOLARI, A. GÓMEZ TUENA, F. ORTEGA GUTÍERREZ, C. ORTEGA OBREGÓN   +3 more
doaj  

New Research Results on U-Pb Zircon Isotope Age of Ta Cu Granodiorite in Dalat Zone and Geological Significance

Iraqi Geological Journal
Ta Cu granodiorites from the Dalat Zone, Southern Vietnam, have typical composition of granodiorite, coinciding with the Dinh Quan complex. The granodiorites are composed of plagioclase (45–50%), quartz (20–25%), orthoclase (15–20%), hornblende (
le phuc, Pham Minh , Pham Hieu , Trinh Vi   +3 more
doaj   +1 more source

Quantitative Relationships Between Basalt Geochemistry, Shear Wave Velocity, and Asthenospheric Temperature Beneath Western North America

Geochemistry, Geophysics, Geosystems, 2018
Western North America has an average elevation that is ∼2 km higher than cratonic North America. This difference coincides with a westward decrease in average lithospheric thickness from ∼240 to 260 basaltic samples.
M. Klöcking, N. J. White, J. Maclennan, D. McKenzie, J. G. Fitton   +4 more
doaj   +1 more source

U-Pb dating and geodynamics of mafic bodies at the southern margin of Lake Urmia, an evidence of Cretaceous magmatism in northwest Iran [PDF]

علوم زمین خوارزمی
In the northwestern part of the Sanandaj-Sirjan zone, mafic intrusive bodies are aligned with the trend of the Zagros orogenic belt. In this part of the Iranian lithosphere, magmatic activity occurred during three main periods: Cretaceous, Eocene, and ...
Mohammad Najari, Ahmad Jahangiri, Ryo Anma   +2 more
doaj  

Orthopyroxene-bearing magmatism of the “Plateau des lacs” syncline (Imilchil, Central High Atlas, Morocco): insights from mineralogy, geochemistry and Sm-Nd isotopes

Frontiers in Earth Science
The Central High Atlas of Morocco has been the site of an extensive transitional to alkali mafic magmatism from Middle Jurassic (B1 event) to Lower Cretaceous (B2 event).
Hassane Nachit, Said Belkacim, Abderrahmane Ibhi, Vanni Moggi Cecchi, Giorgio S. Senesi   +4 more
doaj   +1 more source

U‐Pb Geochronology and Lu‐Hf Isotopic Characterization of the Canadian High Arctic Large Igneous Province (HALIP): Comparison to Oceanic Plateau Magmatism

Geochemistry, Geophysics, Geosystems
Recent high‐precision geochronological studies have delineated three main pulses of basaltic magmatism between ca. 130‐80 Ma in the Cretaceous High Arctic Large Igneous Province (HALIP) in northern Canada.
D. M. Dockman, T. Hadlari, D. G. Pearson, L. M. Heaman, C. Sarkar, K. Dewing   +5 more
doaj   +1 more source