Results 11 to 20 of about 1,610 (241)
The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces
Geophysical Monograph Series, Page 229-246., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson +2 more
wiley +7 more sources
Morphotectonic Analysis of the East Manus Basin, Papua New Guinea
Frontiers in Earth Science, 2021 Backarc basin systems are important sites of extension leading to crustal rupture where basin development typically occurs in rifting phases (or stages) with the final successful stages identified by the formation of spreading ridges and new oceanic ...
Nicholas J. Dyriw +6 more
doaj +1 more source
Remote Sensing, 2021 Underwater volcanoes and their linear distribution on the flanks of mid-ocean ridges are common submarine topographic structures at intermediate- and fast-spreading systems, where sufficient melt supplies are often available.
Hakkyum Choi +3 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, 2021 The Australian‐Antarctic Ridge (AAR) is an intermediate‐spreading rate system located between the Southeast Indian Ridge and Macquarie Triple Junction of the Australian‐Antarctic‐Pacific plates. KR1 is the easternmost and longest AAR segment and exhibits
Hakkyum Choi +2 more
doaj +1 more source
Pulsated Global Hydrogen and Methane Flux at Mid‐Ocean Ridges Driven by Pangea Breakup
Geochemistry, Geophysics, Geosystems, 2020 Molecular hydrogen production occurs through the serpentinization of mantle peridotite exhumed at mid‐ocean ridges. Hydrogen is considered essential to sustain microbial life in the subsurface; however, estimates of hydrogen flux through geological time ...
Andrew S. Merdith +5 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, 2021 The Macquarie Ridge Complex (MRC) on the Australia‐Pacific plate boundary south of New Zealand is an extinct mid‐ocean ridge that has experienced a complex tectonic history and produced highly heterogeneous mid‐ocean ridge basalts (MORBs).
Qiang Jiang +9 more
doaj +1 more source
Swiss Journal of Geosciences, 2021 Exhumation of basement rocks on the seafloor is a worldwide feature along passive continental margins and (ultra-) slow-spreading environments, documented by dredging, drilling or direct observations by diving expeditions. Complementary observations from
Thierry Decrausaz +4 more
doaj +1 more source
Geophysical Research Letters, 2023 Valdivia Bank (VB) is a Late Cretaceous oceanic plateau formed by volcanism from the Tristan‐Gough hotspot at the Mid‐Atlantic Ridge (MAR). To better understand its origin and evolution, magnetic data were used to generate a magnetic anomaly grid, which ...
S. Thoram +29 more
doaj +1 more source
Initiation of a Proto-transform Fault Prior to Seafloor Spreading [PDF]
Geochemistry, Geophysics, Geosystems, 2018 ©2018. The Authors. Transform faults are a fundamental tenet of plate tectonics, connecting offset extensional segments of mid-ocean ridges in ocean basins worldwide. The current consensus is that oceanic transform faults initiate after the onset of seafloor spreading.
F. Illsley‐Kemp +9 more
openaire +7 more sources
A Global Data Set of Present‐Day Oceanic Crustal Age and Seafloor Spreading Parameters
Geochemistry, Geophysics, Geosystems, 2020 We present an updated oceanic crustal age grid and a set of complementary grids including spreading rate, asymmetry, direction, and obliquity. Our data set is based on a selected set of magnetic anomaly identifications and the plate tectonic model of ...
Maria Seton +8 more
doaj +1 more source