By David M. Christie, Charles R. Fisher, Sang-Mook Lee, Sharon Givens
Released via the yank Geophysical Union as a part of the Geophysical Monograph sequence, quantity 166.
New ocean crust is consistently created the place tectonic plates diverge. a particular form of oceanic crust is shaped through back-arc spreading platforms that parallel oceanic island arcs at the part clear of the subducting plate. Volatile-rich and spatially variable, back-arc spreading platforms are a traditional laboratory for multi-disciplinary experiences of seafloor production, the circulate of magma from the deep earth, and the hydrothermal ecosystems that this circulation sustains.
Derived from the distinguished Ridge 2000 InterRidge Theoretical Institute held in 2004, Back-Arc Spreading structures: Geological, organic, Chemical, and actual Interactions reports the kingdom of the technological know-how, with pick out case studies.
Experienced researchers in, and scholars of, marine geology, organic oceanography, marine geochemistry, volcanology, petrology, and geo- and paleomagnetism will locate this quantity an important source now and for the close to future.
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Extra info for Back-Arc Spreading Systems: Geological, Biological, Chemical, and Physical Interactions
L. Tiffin (1993), Northern Lau Basin: Backarc extension at the leading edge of the Indo-Australian Plate, Geo-Mar. , 13, 107–115. Parson, L. , and I. C. Wright (1996), The Lau-Havre-Taupo back-arc basin: A southward-propagating, multi-stage evolution from rifting to spreading, Tectonophysics, 263, 1–22. , and J. G. Sclater (1977), An analysis of the variation of ocean floor bathymetry and heat flow with age, J. Geophys. Res, 82, 803–827. Peacock, S. M. (1996), Thermal and petrological structure of subduction zones, in Subduction: Top to Bottom, edited by G.
L. (1993), Seaf loor Spreading in the Mariana Trough, in Preliminary report of the Hakuho-Maro Cruise KH92-1, edited by J. Segawa, pp. 5–16, Ocean Research Institute, Tokyo. Kusznir, N. , and R. G. Park (1987), The extensional strength of the continental lithosphere: its dependence on geothermal gradient, and crustal composition and thickness, in Continental Extensional Tectonics, edited by M. P. , pp. 35–52, Geological Society of America. , J. Goslin, H. -L. -M. Auzende (1997), Multiple active spreading centres in the hot North Fiji Basin (Southwest Pacific): a possible model for Archaean seafloor dynamics?
Water released from the slab may hydrate the refractory mantle, causing it to decrease in viscosity and form buoyant diapirs that rise into the mantle wedge. As these blobs of refractory mantle are entrained in the flow of seafloor spreading melting regimes, they displace more fertile (MORB-source) mantle, thereby lowering total melt production while the bulk of the lavas retain normal chemistry. , 1995]. When spreading centers separate sufficiently from the AVF, they are largely removed from these subduction effects; they advect essentially MORBsource mantle and acquire MOR characteristics.