Results 31 to 40 of about 7,693 (174)
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 +3 more
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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
JGEET: Journal of Geoscience, Engineering, Environment and TechnologyThe 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 +4 more
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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 +9 more
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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 +3 more
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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 +13 more
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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 +2 more
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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 +2 more
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Nitrogen isotopic composition of the MORB mantle: A reevaluation [PDF]
Geochemistry, Geophysics, Geosystems, 2004 Nitrogen in the mantle source of mid oceanic ridge basalts (MORBs) is commonly believed to have δ15N∼−5‰. This is based on a (selective) statistical average drawn from nitrogen isotopic data obtained simultaneously with argon from MORBs. However, on critical evaluation, using the accompanying 40Ar/36Ar data, we show this approach to be somewhat ...
Ratan K. Mohapatra, S. V. S. Murty
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Frontiers in Earth Science, 2022 The abundance of mantle-derived rocks and lavas, in combination with its tectonic evolution, render Mexico a perfect laboratory to investigate the chemical and the isotopic heterogeneity of the lithospheric mantle.
Andres Sandoval-Velasquez +7 more
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