Daniel A Coulthard Jr

Daniel A Coulthard Jr
Massey University · Institute of Natural Sciences

Doctor of Philosophy

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10
Publications
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32
Citations

Publications

Publications (10)
Article
Full-text available
Olivine-hosted melt inclusions (MIs) are widely used as a tool to study the early stages of magmatic evolution. There are a series of processes that affect MI compositions after trapping, including post-entrapment crystallization (PEC) of the host mineral at the MI boundaries, exsolution of volatile phases into a “shrinkage bubble” and diffusive ex...
Article
Boninites are rare high magnesium andesites that often contain trace chromites. These chromites precipitate from primitive boninitic melts and are thought to be carried to the surface in melts that continue to crystallize a significant volume of silicate minerals. Such magmatic differentiation drives primitive chromite out of equilibrium with the r...
Article
Full-text available
International Ocean Discovery Program Expedition 352 to the Bonin forearc drilled the sequence of volcanic rocks erupted in the immediate aftermath of subduction initiation along the western margin of the Pacific Plate. Pristine volcanic glasses collected during this expedition were analyzed for major and trace elements, halogens, sulfur, and H and...
Article
Full-text available
Central aims of IODP Expedition 352 were to delineate and characterize the magmatic stratigraphy in the Bonin forearc to define key magmatic processes associated with subduction initiation and their potential links to ophiolites. Expedition 352 penetrated 1.2 km of magmatic basement at four sites and recovered three principal lithologies: tholeiiti...
Conference Paper
The Búðahraun flow is an alkaline basalt flow located ~100km away from the main rift zone in western Iceland. The rock has a primitive composition (8-12% MgO), and it is derived from a cinder cone and not from a fissure eruption. It is porphyritic with macrocryst phases of olivine (ol), clinopyroxene (cpx) and plagioclase feldspar (plag) making up...
Conference Paper
Post-glacial (<12 Kya) volcanism on the Snaefellsnes peninsula (west Iceland) is dominated by low-volume monogenetic eruptions from point source cinder cones in contrast to the larger-volume fissure eruptions occurring in the main rift zones (>100 km away) that dominate Icelandic volcanism. These flank-zone lavas are mainly primitive (>8wt% MgO) al...

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