Results 71 to 80 of about 776,982 (368)
Frontiers in earth sciences: new ideas and interpretation
Annals of Geophysics, 2006 A one-day symposium on new and conventional ideas in plate tectonics and Mediterranean geodynamics was held in Rome on February 19, 2003 at the headquarters of INGV. There were two main reasons for such an initiative.
G. Scalera, G. Lavecchia
doaj +1 more source
, 2015 The driving force for transient vertical motions of Earth's surface remains an outstanding question. A main difficulty lies in the uncertain role of the underlying mantle, especially during the geological past.
Lijun Liu
semanticscholar +1 more source
Tertiary-Quaternary subduction processes and related magmatism in the Alpine-Mediterranean region [PDF]
, 2006 During Tertiary to Quaternary times, convergence between Eurasia and Africa resulted in a variety of collisional orogens and different styles of subduction in the Alpine-Mediterranean region.
Downes, Hilary +2 more
core +1 more source
Deep Underground Science and Engineering, EarlyView.The Fobinso granitoids are granodiorites, while the Esuajah granitoids are granites based on their mineralogical composition. The granitoids are generally enriched in LILE and LREE than HFSE, MREE, and HREE, indicating mixing with crustal sources during their evolution.
Emmanuel D. Sunkari +2 more
wiley +1 more source
Subducted Carbon From Mantle Plume in Mid‐Ocean Ridge Basalts
Geophysical Research LettersDeciphering the Earth's deep carbon cycle, from mantle plumes to mid‐ocean ridges, remains incompletely understood. In this study, we analyze the magnesium isotope composition of basalts collected from the South Mid‐Atlantic Ridge (SMAR), which have been
Haitao Zhang +5 more
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Petrology, geochemistry and petrogenesis of volcanic band rocks in North of Tabriz, NW Iran [PDF]
پترولوژی, 2017 The studied volcanic rocks are located in 35 km North West of Tabriz and consists of dacite, andesite, basalt and basaltic andesite. Based on structural geology evidences, this area is part of west Alborz – Azerbaijan zone. Plio - Quaternary volcanism is
Mahdiyeh Fazelihagh +2 more
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, 2015 We present an overview of the geology , eochemistry and petrogenesis of continental mar gin ophiolites (CMO), which represent the lithospheric remnants of riftgenerated paleo ocean – continent transition zones (OCTZ) in orogenic belts.
E. Saccani +3 more
semanticscholar +1 more source
Polluted White Dwarfs: Constraints on the Origin and Geology of Exoplanetary Material [PDF]
Monthly Notices of the Royal Astronomical Society, Volume 479,
Issue 3, 21 September 2018, Pages 3814-3841, 2018 White dwarfs that have accreted rocky planetary bodies provide unique insights regarding the bulk composition of exoplanetary material. The analysis presented here uses observed white dwarf atmospheric abundances to constrain both where in the planetary system the pollutant bodies originated, and the geological and collisional history of the pollutant ...
arxiv +1 more source
Solid Earth Sciences, 2022 A suite of highly fractionated granites and associated pegmatite, were revealed through drill hole in the Anqing ore-cluster region in the Lower Yangtze River Belt (MLRB), Eastern China, for the first time. The pegmatite has abundant tourmaline.
Zhuang Zhao +6 more
doaj
Mantle structural geology from seismic anisotropy [PDF]
, 1999 International audience; Seismic anisotropy is a ubiquitous feature of the subcontinental mantle. This can be inferred both from direct seismic observations of shear wave splitting from teleseismic shear waves, as well as the petrofabric analyses of mantle nodules from kimberlite pipes.
Silver, Paul +4 more
openaire +1 more source