Results 31 to 40 of about 4,946 (117)

Lava Geochemistry as a Probe into Crustal Formation at the East Pacific Rise [PDF]

Oceanography, 2012
Basalt lavas comprise the greatest volume of volcanic rocks on Earth, and most of them erupt along the world's mid-ocean ridges (MORs). These MOR basalts (MORBs) are generally thought to be relatively homogeneous in composition over large segments of the
Michael R. Perfit, V. Dorsey Wanless, W. Ian Ridley, Emily M. Klein, Matthew C. Smith, Adam R. Goss, Jillian S. Hinds, Scott W. Kutza, Daniel J. Fornari   +8 more
doaj  

Ocean bottom seismic model in the Knipovich Ridge area [PDF]

Polish Polar Research
The structure of the oceanic crust generated by the ultraslow-spreading mid-ocean Knipovich Ridge still remains relatively uninvestigated compared to the other North Atlantic spreading ridges further south. The complexity of the Knipovich Ridge, with its
Wojciech Czuba, Yoshio Murai, Tomasz Janik, Andrzej Górszczyk, Krzysztof Michalski   +4 more
doaj   +1 more source

Seismic evidence for uniform crustal accretion along slow-spreading ridges in the equatorial Atlantic Ocean

Nature Communications, 2022
Uniform magmatic crust formed at the Mid-Atlantic Ridge in the equatorial Atlantic Ocean reveals a two-dimensional mantle upwelling facilitated by the large transform faults and the high concentration of volatiles in the primitive melt in the mantle.
Zhikai Wang, Satish C. Singh
doaj   +1 more source

Mid‐Ocean Ridge (MOR) Ash Dispersal on Axial Seamount, Juan de Fuca Ridge

Geochemistry, Geophysics, Geosystems
Rare eruption of primitive normal mid‐ocean ridge basalt (N‐MORB) magma (∼9.5 wt% MgO) on the summit of Axial Seamount generated abundant ash that was dispersed for several km.
Ryan A. Portner, Guangyu Xu, Arran P. Murch, David A. Clague, Brian M. Dreyer, Jennifer B. Paduan   +5 more
doaj   +1 more source

Magmatic activity at the slowest spreading rates: insights from a high-resolution earthquake catalog obtained from Gakkel Ridge Deep (Arctic Ocean)

Seismica
At the eastern end of Gakkel Ridge, Arctic Ocean, spreading rates drop below 5 mm/y near the termination of the active mid-ocean ridge in the Laptev Sea.
David Essing, Annika Hellbrück, Vera Schlindwein   +2 more
doaj   +1 more source

Earthquake Seismicity Reveals the Location and Significance of the Shona Mantle Plume in the South Atlantic Ocean

Geophysical Research Letters
The South Atlantic Ocean hosts several well‐studied volcanic ridges and seamount chains, but the origin of their associated mantle plumes is debated.
Ross Parnell‐Turner
doaj   +1 more source

Chronological, geochemical characteristics and tectonic evolution significance of the Sanyan eclogites in the Jinsha River suture zone, eastern Xizang

Dizhi lixue xuebao
Objective  As a key component of the eastern Tethys tectonic domain, the Jinsha River–Ailao Mountain suture zone is widely recognized as a Paleo-Tethys orogenic belt.
TANG Yuan, LI Yiduo, WANG Dongbing, HAN Mingming, LI Xin, LUO Liang   +5 more
doaj   +1 more source

Archean cratonic mantle recycled at a mid-ocean ridge. [PDF]

Sci Adv, 2022
Liu CZ, Dick HJB, Mitchell RN, Wei W, Zhang ZY, Hofmann AW, Yang JF, Yang JF, Li Y.   +8 more
europepmc   +1 more source

Subducted Carbon From Mantle Plume in Mid‐Ocean Ridge Basalts

Geophysical Research Letters
Deciphering 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, Quanshu Yan, Xuefa Shi, Chuanshun Li, Fang Huang, Qiuyu Wen   +5 more
doaj   +1 more source

Nitrite accumulation and anammox bacterial niche partitioning in Arctic Mid-Ocean Ridge sediments. [PDF]

ISME Commun, 2023
Zhao R, Babbin AR, Roerdink DL, Thorseth IH, Jørgensen SL.   +4 more
europepmc   +1 more source