Results 21 to 30 of about 7,709 (174)

A Machine Learning Based‐Approach to Predict the Water Content of Mid‐Ocean Ridge Basalts

Geochemistry, Geophysics, Geosystems, 2023
Water is critical in the evolution of the mantle due to its strong influence on the physicochemical properties of mantle rocks. Mid‐ocean ridge basalts (MORBs) are commonly used to study the compositional characteristics of the convecting upper mantle ...
Jingjun Zhou, Jia Liu, Qunke Xia, Cheng Su, Takeshi Kuritani, Eero Hanski   +5 more
doaj   +1 more source

Geoquímica e petrogênese de metabasitos do grupo Votuverava (Terreno Apiaí, Cinturão Ribeira Meridional): evidências de uma bacia retroarco calimiana

Geologia USP. Série Científica, 2011
O Grupo Votuverava (ca. 1500 - 1400 Ma) faz parte do Terreno Apiaí, um segmento do Cinturão Ribeira Meridional. É constituído por turbiditos distais com expressivo magmatismo básico representado por lentes concordantes de metabasito.
Frederico Meira Faleiros, Viviane Carillo Ferrari, Vicente Sérgio Costa, Ginaldo Ademar da Cruz Campanha   +3 more
doaj   +1 more source

Morphology and Petrogenesis of Pillow Lavas from the Ganj Ophiolitic Complex, Southeastern Kerman, Iran [PDF]

Journal of Sciences, Islamic Republic of Iran, 2009
The Upper Cretaceous Ganj complex, a part of the Jazmurian ophiolitic belt, is located on the western boundary of Jazmurian depression and separated from Kahnuj ophiolitic complex by north-south trending Jiroft fault.
A.R. Shaker Ardakani
doaj  

Geochemistry of Igneous Rocks of Citirem Formation and Its Implications for the Tectonic Setting in Ciletuh – Palabuhanratu UNESCO Global Geopark Area

JGEET: Journal of Geoscience, Engineering, Environment and Technology
The igneous rocks of the Citirem Formation in the Ciletuh – Palabuhanratu UNESCO Global Geopark area petrographically not only consist of basalt, but also andesite, dacite, and gabbro.
Hafidhah Nurul Haq, Mega Fatimah Rosana, Cipta Endyana, Katon Sena Ajie Nugraha, Irpan Alamsyah   +4 more
doaj   +1 more source

Intra-oceanic subduction in the southeastern Paleo-Asian ocean: Evidence from early Permian gabbro of the Diyanmiao ophiolite in central Inner Mongolia, North China

Frontiers in Earth Science, 2023
Investigation of intra-oceanic subduction can improve our understanding of plate tectonic processes and the history of continental growth. Evidence for intra-oceanic subduction in the Paleo-Asian Ocean has recently become an important focus of research ...
Xiawei Zhang, Xiawei Zhang, Yingjie Li, Yingjie Li, Genhou Wang, Shuai Wang, Shuai Wang, Xingrui Kong, Xiaodong Wang, Zhibin Liu   +9 more
doaj   +1 more source

Geochemistry and Petrogenesis of Metabasites from the Votuverava Group (Apiaí Terrane, Southern Ribeira Belt): Evidence of a Calymmian Back-arc Basin Frederico [PDF]

Geologia USP. Série Científica, 2011
The Votuverava Group (ca. 1500 - 1400 Ma), which is part of the Apiaí Terrane, a segment of the Southern RibeiraBelt, is composed of distal turbidites with signifi cant basic magmatism represented by concordant lenses of metabasite.Twenty metabasite ...
Frederico Meira Faleiros, Viviane Carillo Ferrari, Vicente Sérgio Costa, Ginaldo Ademar da Cruz Campanha   +3 more
doaj  

Applicability of large-ion lithophile and high field strength element basalt discrimination diagrams

International Journal of Digital Earth, 2018
Basalt discriminant diagrams have been used to identify the tectonic setting of basaltic magmatism since the 1970s and have played an important role in reconstructing paleotectonic environments.
X. L. Liu, Q. Zhang, W. C. Li, F. C. Yang, Y. Zhao, Z. Li, S. T. Jiao, J. R. Wang, N. Zhang, S. S. Wang, W. F. Chen, Z. J. Pan, J. Yang, X. L. Du   +13 more
doaj   +1 more source

Rapid Formation of the Ellice and Osbourn Basins and Ontong Java Nui Breakup Kinematics

Geochemistry, Geophysics, Geosystems, 2023
Breakup of the proposed greater Ontong Java Nui large igneous province during the Cretaceous Normal Superchron can be constrained by the opening of the Ellice Basin (EB) separating the Ontong Java and Manihiki Plateaus and the Osbourn Basin separating ...
P. C. Davidson, A. A. P. Koppers, J. G. Konter   +2 more
doaj   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

Why is the remanent magnetic intensity of Cretaceous MORB so much higher than that of mid to late Cenozoic MORB? [PDF]

Geosphere, 2005
The fact that the natural remanent magnetization (NRM) intensity of mid-oceanicridge basalt (MORB) samples shows systematic variations as a function of age has long been recognized: maximum as well as average intensities are generally high for very young samples, falling off rather rapidly to less than half the recent values in samples between 10 and ...
Daming Wang, Rob Van der Voo, Donald R. Peacor   +2 more
openaire   +1 more source