Magmatic breakup as an explanation for magnetic anomalies at magma-poor rifted margins
Continental breakup is usually marked by a sharp contact between continental and oceanic
crust. However, in settings with low magma supply, this transition zone is much wider, and …
crust. However, in settings with low magma supply, this transition zone is much wider, and …
Age and geochemistry of volcanic rocks from the Hikurangi and Manihiki oceanic Plateaus
Here we present the first radiometric age data and a comprehensive geochemical data set
(including major and trace element and Sr–Nd–Pb–Hf isotope ratios) for samples from the …
(including major and trace element and Sr–Nd–Pb–Hf isotope ratios) for samples from the …
Galapagos‐OIB signature in southern Central America: Mantle refertilization by arc–hot spot interaction
Although most Central American magmas have a typical arc geochemical signature,
magmas in southern Central America (central Costa Rica and Panama) have isotopic and …
magmas in southern Central America (central Costa Rica and Panama) have isotopic and …
Across-arc geochemical variations in the Southern Volcanic Zone, Chile (34.5–38.0 S): constraints on mantle wedge and slab input compositions
Crustal assimilation (eg Hildreth and Moorbath, 1988) and/or subduction erosion (eg Stern,
1991, Kay et al., 2005) are believed to control the geochemical variations along the northern …
1991, Kay et al., 2005) are believed to control the geochemical variations along the northern …
Geochronology of the Tore-Madeira Rise seamounts and surrounding areas: a review
ABSTRACT We present new 40Ar/39Ar data for two of the Tore-Madeira Rise (TMR)
volcanic seamounts. A sample from Tore East seamount on the northern part of the TMR …
volcanic seamounts. A sample from Tore East seamount on the northern part of the TMR …
The rift-to-drift transition in the North Atlantic: A stuttering start of the MORB machine?
We report U-Pb and 39Ar-40Ar measurements on plutonic rocks recovered from the Ocean
Drilling Program (ODP) Legs 173 and 210. Drilling revealed continental crust (Sites 1067 …
Drilling Program (ODP) Legs 173 and 210. Drilling revealed continental crust (Sites 1067 …
Age constraints on the Late Cretaceous alkaline magmatism on the West Iberian Margin
The onshore sector of the West Iberian Margin (WIM) was the locus of several cycles of
magmatic activity during the Mesozoic, the most voluminous of which was of alkaline nature …
magmatic activity during the Mesozoic, the most voluminous of which was of alkaline nature …
Barium isotope composition of depleted MORB mantle constrained by basalts from the South Mid-Atlantic Ridge (5–11° S) with implication for recycled components in …
Stable barium (Ba) isotopes are emerging as tracers for the recycling of crustal material into
the mantle. Small but significant Ba isotope variations have been found in global MORB (δ …
the mantle. Small but significant Ba isotope variations have been found in global MORB (δ …
Deep-sea Fe-Mn crusts from the northeast Atlantic Ocean: composition and resource considerations
Eighteen deep-sea ferromanganese crusts (Fe-Mn crusts) from 10 seamounts in the
northeast Atlantic were studied. Samples were recovered from water depths of∼ 1,200 to∼ …
northeast Atlantic were studied. Samples were recovered from water depths of∼ 1,200 to∼ …
Geochemical variations in the Central Southern Volcanic Zone, Chile (38–43 S): the role of fluids in generating arc magmas
Abstract We present new Sr–Nd–Pb–Hf–O isotope data from the volcanic arc (VA, volcanic
front and rear arc) in Chile and the backarc (BA) in Argentina of the Central Southern …
front and rear arc) in Chile and the backarc (BA) in Argentina of the Central Southern …