Browsing Геология России by Author "O'Reilly S.Y."
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Browsing Геология России by Author "O'Reilly S.Y."
Now showing items 1-14 of 14
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Spetsius Z.V.; Belousova E.A.; Griffin W.L.; O'Reilly S.Y.; Pearson N.J. (2002)Zircon megacrysts from the Mir kimberlite, Yakutia, contain inclusions of chromite, chrome diopside, magnesian olivine, Ni-rich monosulfide solid solution and phlogopite. The mineral chemistry of the inclusion suite suggests ...
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Ionov D.A.; O'Reilly S.Y.; Genshaft Y.S.; Kopylova M.G. (1996)Carbonates of mantle origin have been found in xenoliths from Quaternary basaltic volcanoes in NW Spitsbergen. The carbonates range from dolomite to Mg-bearing calcite and have high Mg-numbers [Mg/(Mg+Fe)=(0.92–0.99)]. In ...
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Ionov D.A.; O'Reilly S.Y.; Dupuy C.; Kopylova M.G.; Genshaft Y.S. (1993)Peridotite xenoliths from basaltic volcanics in NW Spitsbergen contain carbonates of mantle origin. These occur as pockets of granular dolomite (Mg# 0.95–0.99) accompanied by fine-grained olivine and Al,Cr,Ti-rich clinopyroxene ...
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Griffin W.L.; Ryan C.G.; Fisher N.I.; Friedman J.; O'Reilly S.Y. (1999)Chrome-pyrope garnet is a minor but widespread phase in ultramafic rocks of the continental lithosphere; it complex chemistry preserves a record of events related to fluid movements in the mantle, including melt extraction ...
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Ionov D.A.; O'Reilly S.Y.; Ashchepkov I.V. (1996)Lherzolite xenoliths in Miocene to Pleistocene basalts from five sites in the Hamar-Daban range in southern Siberia provide sampling of the mantle close to the axis of the Baikal rift. These anhydrous spinel lherzolites ...
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Porcelli D.R.; O'Nions R.K.; O'Reilly S.Y. (1986)The isotopic compositions of He and Sr have been obtained for suites of ultramafic xenoliths brought to the surface by Recent volcanic eruptions in continental environments. Samples include a range of petrologic types from ...
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Belousova E.A.; O'Reilly S.Y.; Griffin W.L.; Fisher N.I. (2002)Trace element abundances in igneous zircons, as determined by electron microprobe and laser-ablation microprobe ICPMS analysis, are shown to be sensitive to source rock type and crystallisation environment. The concentrations ...
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Gaul O.F.; Griffin W.L.; O'Reilly S.Y.; Pearson N.J. (2000)The major-element composition of a grain of peridotitic Cr-pyrope garnet, coupled with a temperature estimate (TNi) derived from its Ni content, can be used to calculate the forsterite (Fo) content (100Mg/(Mg+Fe)) of the ...
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Alard O.; Griffin W.L.; Pearson N.J.; Lorand J.P.; O'Reilly S.Y. (2002)The Os isotopic compositions of mantle rocks generally are considered to be established during melt-depletion events and to be robust to subsequent disturbances (e.g. metasomatism). Consequently, Os isotopes are used to ...
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Ionov D.A.; O'Reilly S.Y.; Prikhodko V.S. (1995)Abundant spinel peridotite xenoliths occur in late Cenozoic alkali basaltic rocks in the Sikhote-Alin region at the Pacific margin of the Asian continent. Major- and trace-element compositions of representative peridotite ...
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Poudjom Djomani Y.H.; O'Reilly S.Y.; Griffin W.L.; Morgan P. (2001)This study uses information on composition, thermal state and petrological thickness to calculate the densities of different types of subcontinental lithospheric mantle (SCLM). Data from mantle-derived peridotite xenoliths ...
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Griffin W.L.; Shee S.R.; Pearson N.J.; Belousova E.; Jackson S.E.; Van Achterbergh E.; O'Reilly S.Y. (2000)Zircon megacrysts represent a late stage in the crystallisation of the magmas that produced the low-Cr megacryst suite (Ol+Opx+Cpx+Gnt+Ilm+Phl+Zir) found in many kimberlites, and may carry information on the sources of the ...
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Griffin W.L.; O'Reilly S.Y.; Abe N.; Aulbach S.; Davies R.M.; Pearson N.J.; Doyle B.J.; Kivi K. (2003)The composition of the subcontinental lithospheric mantle (SCLM) varies in a systematic way with the age of the last major tectonothermal event in the overlying crust. This secular evolution in SCLM composition implies ...
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Ionov D.A.; Griffin W.L.; O'Reilly S.Y. (1997)Amphibole (n = 11), mica (n = 16), apatite (n = 9) and clinopyroxene (n = 19) from mantle xenoliths in alkali basalts from Siberia, Mongolia and Spitsbergen were analysed for Rb, Sr, Ba, Y, Zr, Nb, Th, U, Pb, La, Ce by ...
Now showing items 1-14 of 14
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