Global Correlations of Ocean Ridge Basalt Chemistry with Axial Depth: a New Perspective

Snowball Earth ocean chemistry driven by extensive ridge volcanism during

Rapid hydrothermal cooling above the axial melt lens at fast-spreading mid-ocean ridge

Axial melt lenses sandwiched between the lower oceanic crust and the sheeted dike sequences at fast-spreading mid-ocean ridges are assumed to be the major magma source of oceanic crust accretion. According to the widely discussed "gabbro glacier" model, the formation of the lower oceanic crust requires efficient cooling of the axial melt lens, leading to partial crystallization and crystal-melt...

Composition and depth of origin of primary mid-ocean ridge basalts

Some workers have held that mid-ocean ridge basalts are fractionated from high pressure (15-30 kbar) picritic primary magmas whereas others have favored primary magmas generated at about 10 kbar with compositions close to those of mid-ocean ridge basalts. Of critical significance are presumed differences in composition between experimentally determined primary magmas and the least fractionated ...

A new species of Munidopsis from a seamount of the Southwest Indian Ocean Ridge (Decapoda: Munidopsidae).

Wood and whale bone colonisation experiments were undertaken on the Southwest Indian Ocean Ridge, 18 November 2009. Later, 14 December 2011, squat lobsters were recovered from the submerged wood and assigned to Munidopsis sp. Further study indicated that the specimens belonged to the group of species having a rostrum without lateral spines, presence of two strong epigastric spines, unarmed abdo...

Snowball Earth ocean chemistry driven by extensive ridge 1 volcanism during Rodinia breakup

During Neoproterozoic Snowball Earth glaciations, the oceans gained 8 massive amounts of alkalinity, culminating in the deposition of massive 9 cap carbonates upon deglaciation. Changes in terrestrial runoff associ10 ated with both breakup of the Rodinia supercontinent and deglaciation 11 can explain some, but not all of the requisite changes in ocean chem12 istry. Submarine volcanism along sha...