Results 71 to 80 of about 449 (169)

CARBONIFEROUS 40Ar/39Ar AGE OF THE RARE METAL-ENRICHED RHYOLITES AND IGNIMBRITES IN THE SAKMARA ALLOCHTHON OF THE SOUTHERN URALS, THEIR GEOCHEMICAL FEATURES AND GEODYNAMIC SETTING

Известия высших учебных заведений: Геология и разведка, 2018
In the structure of the Sakmara allochthon of the Southern Uralssequence with rhyolites and ignimbrites locally occures. They have Nb-Zr-REE geochemical specialization.
A. V. Ryazantsev, A. V. Pilitsina, I. A. Novikov, K. E. Degtyarev   +3 more
doaj   +1 more source

The Effects of a Microplate on Plume‐Ridge Interactions: Constraints From Comparing Easter and Juan Fernandez Microplates in the Eastern Pacific Ocean

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract This study investigates the nature of plume‐ridge interactions near a tectonic microplate using mantle Bouguer anomaly (MBA) gravity calculations. The focus of this investigation is a comparison of the Easter and Juan Fernandez microplates, which are located in the eastern Pacific Ocean along the Pacific, Nazca, and Antarctic plate boundaries.
Katherine Ames, Jennifer Georgen
wiley   +1 more source

Volcanism and seismicity in the Indo-Australian seismic belt: manifestations of intraplate tectonics

Annals of Geophysics, 1978
Disregarding the mid-oceanic ridges, the oceanic part of the Indo-<br />Australian Seismic Belt is the longest, seismically active zone in the<br />world-ocean. It begins west of Ceylon and runs towards Australia.
P. HEDERVARI
doaj   +1 more source

Intraplate Basalts in Eastern Continental China Record the Subduction History of the Pacific Plate

Geophysical Research Letters
To assess whether intraplate magmatism in eastern continental China records the subduction history of the Pacific plate, we plotted elemental compositions of the volcanic rocks in this region since the Early Cretaceous as a function of age.
Pu Sun, Yaoling Niu, Pengyuan Guo, Meng Duan, Xiaohong Wang, Hongmei Gong   +5 more
doaj   +1 more source

Mantle Transition Zone Structure Beneath the Sunda–Java Trench and Christmas Island: Implications for Deep Dehydration and Petit-Spot Volcanism

Geosciences
Petit-spot volcanism is a type of intraplate volcanism that commonly occurs near the outer rise in subducting plates. Although deformation of the incoming plate is considered important for its development, the deeper mantle processes contributing to this
Ba Manh Le, Ting Yang, Thi-Giang Ha, Van-Duong Nguyen, Thanh Hai Nguyen, Van Vung Vi, Thuy Linh Nguyen, Van Duan Bui, Minh Tuan Vu, The Truyen Pham, Anh Duong Nguyen   +10 more
doaj   +1 more source

Interrelation of the stagnant slab, Ontong Java Plateau, and intraplate volcanism as inferred from seismic tomography. [PDF]

Sci Rep, 2021
Obayashi M, Yoshimitsu J, Suetsugu D, Shiobara H, Sugioka H, Ito A, Isse T, Ishihara Y, Tanaka S, Tonegawa T.   +9 more
europepmc   +1 more source

Mantle dynamics beneath the Pacific Northwest and the generation of voluminous back‐arc volcanism

Geochemistry, Geophysics, Geosystems, 2012
The Pacific Northwest (PNW) has a complex tectonic history and over the past ∼17 Ma has played host to several major episodes of intraplate volcanism.
Maureen D. Long, Christy B. Till, Kelsey A. Druken, Richard W. Carlson, Lara S. Wagner, Matthew J. Fouch, David E. James, Timothy L. Grove, Nicholas Schmerr, Chris Kincaid   +9 more
doaj   +1 more source

Generation of Channelized Mantle Flow Beyond the Rift Zone Accelerated by Thermal Heterogeneity and Rift Propagation

Geochemistry, Geophysics, Geosystems
Rifting is a tectonic process that leads to extensive magmatic activity, continental breakup, and the formation of new oceanic crust. The interplay between rifting and dynamic mantle flow driven by thermal heterogeneity in the mantle along the rift‐axis ...
Min‐Seok Jang, Byung‐Dal So
doaj   +1 more source

Specific activities of natural rocks and soils at quaternary intraplate volcanism north of Sana'a, Yemen. [PDF]

J Med Phys, 2012
Harb S, El-Kamel Ael-H, Abbady Ael-B, Saleh II, El-Mageed AI.   +4 more
europepmc   +1 more source

Phases in fine volcanic ash. [PDF]

Sci Rep, 2023
Hornby A, Gazel E, Bush C, Dayton K, Mahowald N.   +4 more
europepmc   +1 more source