Results 131 to 140 of about 11,816 (290)
Sedimentology, EarlyView.ABSTRACT The Paleoarchean Antarctic Creek Member of the Mount Ada Basalt, Eastern Pilbara Terrane, Western Australia, includes beds of jasper and white chert composed of sand‐sized silica granules that often contain or are mixed with silt‐sized particles of haematite.
Donald R. Lowe, Gary R. Byerly
wiley +1 more source
Geochemistry, Geophysics, Geosystems, 2014 Eruptive timing in mid‐ocean ridge systems is relatively poorly constrained, despite being an important variable in our understanding of many mid‐ocean ridge processes, including volcanic construction; magma recharge, flux, and storage; and the stability
Julie A. Bowles +5 more
doaj +1 more source
The Seismic Expression of Core Complex‐Style Extensional Detachment Faults in Rifted Margins
Terra Nova, EarlyView.ABSTRACT The identification of core complex‐style extensional detachment faults (CCDFs) in rifted margins is crucial for accurately restoring their stratigraphic and thermal histories. Yet recognising CCDFs in seismic reflection images is challenging due to their faint topographic expression; the lack of associated abrupt offset in seismic reflections;
Pauline Chenin +3 more
wiley +1 more source
Porosity-driven convection and asymmetry beneath mid-ocean ridges
, 2010 Seismic tomography of the asthenosphere beneath mid-ocean ridges has produced images of wave speed and anisotropy that are asymmetric across the ridge axis.
Richard F. Katz, Katz, RF, Katz, Richard
core +1 more source
Emergence of Continents Stabilized the Bioavailability of Boron
Terra Nova, EarlyView.ABSTRACT Boron is an essential element for the development of life on Earth; borates stabilize ribose in prebiotic reactions and facilitate metabolism in higher plants. There is, however, a relatively narrow surface boron concentration range over which borates stabilize and serve as a micronutrient rather than a toxin.
Brendan V. Dyck, Jon Wade
wiley +1 more source
, 2019 Supplementary Material for Merdith et al, Pulsated Global Hydrogen and Methane Flux at Mid-Ocean Ridges driven by Pangea Breakup, submitted to G-cubed.
Wright, Nicky M. +21 more
core +1 more source
Seismicity of ultraslow-spreading mid-ocean ridges
, 2013 In this thesis, I synthesize my research on the seismicity of ultraslow spreading ridges describing the overarching theme of 10 peer-reviewed publications. At mid-ocean ridges, the lithospheric plates drift apart, magma fills the gap to form new crust.
Schlindwein, Vera
core
, 2006 Despite its impact in understanding oceanic crust formation and eruptive styles of related volcanism, magma dynamics at midocean ridges are poorly known. Here, we propose a new method to assess ascent rates of mid-ocean ridge basalt (MORB) magmas,as well
Paonita, A., Martelli, M.
core +1 more source
Steady-state creation of crust-free lithosphere at cold spots in mid-ocean ridges
, 2001 Mid-ocean ridges create oceanic lithosphere consisting normally of basaltic crust a few kilometers thick overlying a peridotitic mantle. However, lithosphere free of basaltic crust formed during the past ;30 m.y. at an ;50-km-long stretch of Mid-Atlantic
SEYLER M. +5 more
core +1 more source
Rifting processes at ultraslow mid-ocean ridges
, 2014 Mid-ocean rift systems opening at full spreading rates < 20 mm/y differ in their structure from all faster spreading ridges. One of the key differences is that the small amount of available melt is not distributed evenly along the ridge axis.
Demuth, Andrea +2 more
core