Global systematics of unaveraged mid-ocean ridge basalt compositions: Comment [on “Global correlations of ocean ridge basalt chemistry with axial depth and crustal thickness” by E. M. Klein and C. H. Langmuir]
نویسندگان
چکیده
منابع مشابه
Melting systematics in mid-ocean ridge basalts: Application of a plagioclase-spinel melting model to global variations in major element chemistry and crustal thickness
Woods Hole Road MS #22, Woods Hole, MA 02543, email: [email protected], phone: 508-289-3637, fax: 508-457-2187. Melting systematics in mid-ocean ridge basalts: Application of a 1 plagioclase-spinel melting model to global variations in major element 2 chemistry and crustal thickness 3 4 Mark D. Behn and Timothy L. Grove, 5 6 Department of Geology and Geophysics, Woods Hole Oceanographic Institutio...
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Earth’s dominant form of magmatism occurs at mid-ocean ridges (MORs), producing the igneous crust for two-thirds of the planet’s surface and conveying significant heat and material fluxes from the mantle to the world’s oceans. Mid-ocean-ridge basalt (MORB) magmas form from upwelling compositionally heterogeneous mantle1 by aggregation of near-fractional melts beneath spreading centres2. Multipl...
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Composition, mean pressure, mean melt fraction, and crustal thickINTRODUCTION ness of model mid-ocean ridge basalts (MORBs) are calculated Comparison of observed basalt compositions with the using MELTS. Polybaric, isentropic batch and fractional melts predictions of polybaric mantle melting models places from ranges in source composition, potential temperature, and final important restrictions...
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Figure 11 Average depth of magma lens reflections beneath ridges versus spreading rate. The curved line shows the depth to the 12003C isotherm calculated from the ridge thermal model of Phipps Morgan J and Chen YJ (1993) Journal of Geophysical Research 98: 6283}6297. Data from different ridges are labeled Reykjanes Ridge (RR), Juan de Fuca Ridge (JdF), Costa Rica Rift (CRR), Lau Basin (Lau), no...
متن کاملRidge migration, asthenospheric flow and the origin of magmatic segmentation in the global mid-ocean ridge system
[1] Global observations of mid-ocean ridge (MOR) bathymetry demonstrate an asymmetry in axial depth across ridge offsets that is correlated with the direction of ridge migration. Motivated by these observations, we have developed two-dimensional numerical models of asthenospheric flow and melting beneath a migrating MOR. The modification of the flow pattern produced by ridge migration leads to ...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 1989
ISSN: 0148-0227
DOI: 10.1029/jb094ib04p04231