Results 41 to 50 of about 7,693 (174)

Rare gas abundances in MORB

Geochimica et Cosmochimica Acta, 1986
Abstract Data are presented for He, Ar and Xe in a number of MORB glasses and crystalline rocks. The rare gases in the latter group are characterized by atmospheric Ar and Xe, coupled with loss of trapped mantle He, Ar and Xe. The glass data also show clear signs of an atmospheric-like component for Ar and Xe. A reasonably constant world-wide average
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Geochemical characteristics of back-arc basin lower crust and upper mantle at final spreading stage of Shikoku Basin: an example of Mado Megamullion

Progress in Earth and Planetary Science, 2021
This paper explores the evolutional process of back-arc basin (BAB) magma system at final spreading stage of extinct BAB, Shikoku Basin (Philippine Sea) and assesses its tectonic evolution using a newly discovered oceanic core complex, the Mado ...
Norikatsu Akizawa, Yasuhiko Ohara, Kyoko Okino, Osamu Ishizuka, Hiroyuki Yamashita, Shiki Machida, Alessio Sanfilippo, Valentin Basch, Jonathan E. Snow, Atlanta Sen, Ken-ichi Hirauchi, Katsuyoshi Michibayashi, Yumiko Harigane, Masakazu Fujii, Hisashi Asanuma, Takafumi Hirata   +15 more
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Han et al, 2023, MORB data

, 2023
This zip file contains data presented in the submission “Marine magnetic anomalies enhanced by internal stress in rapidly cooled submarine basalts” by Han et al., 2023. 1. Folder “MicroMag” contains two subfolders and a MATLAB script. (1) Subfolder "MicroMag_Models" contains the MERRILL scripts and Patran geometries to reproduce the results.
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High concentration of water in stishovite in the MORB system [PDF]

Geophysical Research Letters, 2002
Stishovite synthesized from natural basalt showed the highest concentration of hydrogen ever reported. The water concentration obtained from the polished single crystal of stishovite in this study was up to a maximum of 5628 ± 291 atoms of hydrogen per 106 silicon atoms (844 ± 44 ppm water).
Jung In Chung, Hiroyuki Kagi
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Relationship Between D‐MORB and E‐MORB Magmatism During Crustal Accretion at Mid‐Ocean Ridges: Evidence From the Masirah Ophiolite (Oman)

Geochemistry, Geophysics, Geosystems
Enriched mid‐ocean ridge basalts (E‐MORB) commonly erupt at mid‐ocean ridges (MOR) and seamounts, but their relationship to “depleted” MORB (D‐MORB) and the processes controlling their magmatic evolution at MORs are not fully understood, hence raising ...
Max N. Jansen, Christopher J. MacLeod, C. Johan Lissenberg, Ian J. Parkinson, Daniel J. Condon   +4 more
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D" Reflection Polarities Inform Lowermost Mantle Mineralogy

Geochemistry, Geophysics, Geosystems, 2022
Polarities of seismic reflections at the discontinuity atop the D" region (PdP and SdS) indicate the sign of the velocity contrast across the D" reflector. Recent studies found PdP polarities matching and opposite those of P and PcP.
C. Thomas, L. J. Cobden, A. R. T. Jonkers   +2 more
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Architecture of ophiolitic mélanges in the Junggar region, NW China

Geosystems and Geoenvironment, 2023
Ophiolitic mélanges, units that contain components of an ophiolite suite, provide crucial information on earth history and orogenic evolution. In this paper, four ophiolitic mélanges are characterized, including the Baijiantan-Yeyagou, Hebukesair ...
Ji'en Zhang, Yichao Chen, Wenjiao Xiao, John Wakabayashi, Shuaihua Song, Jun Luo, Yulong Zhao   +6 more
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Vertical and Spatial Geochemical Variations of Nishinoshima Volcaniclastic Deposits, Japan, During Episode 4

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Nishinoshima is a volcanic island in the Ogasawara Arc that has exhibited intermittent activity since 2013, including four major eruptive episodes: 2013–2015 (Episode 1), 2017 (Episode 2), 2018 (Episode 3), and 2019–2020 (Episode 4). Previous studies reported a change in eruption style—from a Strombolian eruption with lava flows (Episode 1 to the early
Erika Tanaka, Kenta Yoshida, Tomoki Sato, Yoshiro Nishio, Yoshihiko Tamura   +4 more
wiley   +1 more source

Coupled Geodynamical‐Geochemical Perspectives on the Generation and Composition of Mid‐Ocean Ridge Basalts

Geochemistry, Geophysics, Geosystems
Owing to their abundance and relative availability on Earth's seafloor, mid‐ocean ridge basalts (MORBs) have a well‐defined chemical element budget, reflected by the low standard deviation associated with typical normal MORB (N‐MORB) composition. However,
Thomas Duvernay, Shihao Jiang, Patrick W. Ball, D. Rhodri Davies   +3 more
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Hydrated Peridotite–Basaltic Melt Interaction Part II: Fast Assimilation of Serpentinized Mantle by Basaltic Magma

Frontiers in Earth Science, 2020
The most abundant terrestrial lavas, mid-ocean ridge basalt (MORB) and ocean island basalt (OIB), are commonly considered to be derived from a depleted MORB-mantle component (DMM) and more specific, variably enriched mantle plume sources.
Anastassia Y. Borisova, Anastassia Y. Borisova, Nail R. Zagrtdenov, Michael J. Toplis, Georges Ceuleneer, Oleg G. Safonov, Oleg G. Safonov, Oleg G. Safonov, Gleb S. Pokrovski, Klaus Peter Jochum, Brigitte Stoll, Ulrike Weis, Svyatoslav Shcheka, Andrey Y. Bychkov   +13 more
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