Results 71 to 80 of about 3,766 (225)

Petrogenesis and tectonic setting of the Yushishan and Yueyashan ophiolites in the Beishan orogenic belt, China: constraints on the evolution of the southern margin of the middle Paleo-Asian Ocean in early cambrian

Frontiers in Earth Science
The occurrence of ophiolites in the Beishan Orogenic Belt (BOB), located in the southern Central Asian Orogenic Belt (CAOB), is critical for elucidating the tectonic evolution of the southern part of the Paleo-Asian Ocean (PAO).
Lei Wu, Lei Wu, Xinwei Zhai, Xinwei Zhai, Yuxi Wang, Yuxi Wang, Qingqing Yin, ShuYu Jin, Xinrong Liu, Guoxin Zhang, Erteng Wang, Kai Yu, Jinrong Wang, Xiao Tian, Xiao Tian, Ju Wang, Ju Wang, Xia Li   +17 more
doaj   +1 more source

Continental extension of northern Gondwana margin in the Eastern Himalaya: Constraints from geochemistry and U–Pb zircon ages of mafic intrusives in the Siang window, Arunachal Himalaya, India

Comptes Rendus. Géoscience, 2020
We report new U–Pb zircon age and whole-rock geochemical data from the Pangin mafic intrusive rocks of the Siang window, eastern Himalayas. These mafic rocks are medium to coarse-grained gabbros, consisting mainly of plagioclase and clinopyroxene with ...
Oinam, Govind, Singh, A. Krishnakanta, Joshi, Mallickarjun, Dutt, Amrita, Singh, M. Rajanikanta, Singh, N. Lakhan, Singh, R. K. Bikramaditya   +6 more
doaj   +1 more source

Late Carboniferous Paleomagnetism From North Qiangtang Block Reveals a Multibranched Paleo‐Tethys Ocean

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The North Qiangtang Block occupies a pivotal position within the eastern Tethyan realm, and its paleogeographic reconstruction is critical for constraining Tethyan geometry and evolution. However, its Late Paleozoic paleogeography and Paleo‐Tethyan Ocean–continent configuration remain controversial due to limited reliable age‐constrained ...
Jiahui Zhang, Xin Cheng, Zhongshan Shen, Daniel Pastor‐Galán, Bitian Wei, Longyun Xing, Dongmeng Zhang, Nan Jiang, Mengting Zhong, Shuqi Lan, Muhammad Rizwan, Chenglong Deng, Hanning Wu   +12 more
wiley   +1 more source

Petrogenesis and tectonic affinities of ImoronaItsindro gabbros in the Alaotra region of central Madagascar: whole rock analyses and geodynamic implications

, 2023
During the Cryogenian period (0.84–0.76 Ga), the bimodal Imorona-Itsindro plutonic suite intruded the Precambrian basement of Madagascar and has been the subject of continuous debate regarding its origin and tectonic setting.
Sánchez Pastor, Nuria, Rakotondrazafy, Raymond, Narimihamina Rarivoarison, Heninjara   +2 more
core  

Gabbros from IODP Site 1256, equatorial Pacific: Insight into axial magma chamber processes at fast spreading ocean ridges

Geochemistry, Geophysics, Geosystems, 2011
The ODP/IODP multileg campaign at ODP Site 1256 (Cocos plate, eastern equatorial Pacific) provides the first continuous in situ sampling of fast spreading ocean crust from the extrusive lavas, through the sheeted dikes and down into the uppermost gabbros.
J. Koepke, L. France, T. Müller, F. Faure, N. Goetze, W. Dziony, B. Ildefonse   +6 more
doaj   +1 more source

Progressively Fenitised Schist and Carbonatitic Clasts From a Metasomatic Aureole Beneath the Alkalic Dunedin Volcano, Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Clasts of albite‐porphyroblastic quartzofeldspathic schist, derived from the Otago Schist basement, occur within the Port Chalmers Breccia, a diatreme at the centre of the Dunedin stratovolcano, New Zealand. Schists have undergone varying degrees of replacement reactions (at temperatures of 300° to >500°C) producing hornfelses, with Ca‐ and K‐enriched ...
Alan F. Cooper
wiley   +1 more source

Geochemistry of some gabbros from Muhammad Qol area, Northern Red Sea Hills, Sudan Republic [PDF]

, 1980
The Muhammad Qol gabbros can be classified as 3 main rock units comprising olivine pyroxene gabbros, pyroxene gabbros and hornblende pyroxene gabbros. The modal and normative minerals together with the chemical data show that the three rock types were ...
Kabesh Mahmoud Lofty, Refaat Adel M., Abdallah Zeinab M.   +2 more
core  

Electrical properties of slow-spreading ridge gabbros from ODP Hole 1105A, SW Indian Ridge

, 2005
International audiencePhysical properties of gabbroic samples from Ocean Drilling Program Hole 1105A were measured in the laboratory, with a particular emphasis on the analysis of electrical properties.
Einaudi, F., Glover, P., Ildefonse, Benoit, Pezard, P. A.   +3 more
core   +1 more source

GEOLOGICAL AND PETROGRAPHICAL CHARACTERISTICS OF SORAP MASSIF GABBROS, RAS-KOH OPHIOLITE, BALOCHISTAN, WESTERN PAKISTAN: Array

, 2021
This study discussed the Sorap Massif which is the ophiolitic fragment composed of the upper mantle and lower crustal section of an ophiolitic sequence.
Mohammad, Ali, Kakar, M. Ishaq, Ullah, Inayat, Kashani, Abdul Ghaffar, Murad, Fida   +4 more
core   +1 more source

The Seismic Signature of the Atlantis Massif Oceanic Detachment Fault Determined From Crystallographic Preferred Orientation and Microstructure

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract At slow‐spreading mid‐ocean ridges large scale detachment faults partly accommodate the spreading process. The mafic and ultramafic rocks at the ridges are infiltrated by water and change their mineralogy. Subsequently or contemporaneously to these reactions, detachment faulting takes place.
R. Kuehn, J. H. Behrmann, J. Kossak‐Glowczewski, B. Leiss, M. Stipp   +4 more
wiley   +1 more source