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作者:S. C. Hildyard , J. W. Cole , S. D. Weaver
来源:[J].New Zealand Journal of Geology and Geophysics(IF 0.475), 2000, Vol.43 (1), pp.95-107
摘要:Abstract(#br)The 0.89 Ma Tikorangi Ignimbrite (revised name) is a mixed andesite‐rhyolite ignimbrite preserved within a localised area of the Matahana Basin on the western side of the Taupo Volcanic Zone, New Zealand. The source of the ignimbrite is poorly constrained, but t...
作者:... H. E. G. Morgans , J. D. Bradshaw , S. D. Weaver
来源:[J].New Zealand Journal of Geology and Geophysics(IF 0.475), 2003, Vol.46 (2), pp.275-293
摘要:Abstract(#br)The Late Cretaceous‐Paleocene succession exposed on the Tora coast, near the southeastern tip of the North Island, is distinguished by an unusual lithofacies of the Whangai Formation, and by an apparently unique formation, Manurewa Formation, which spans the Cre...
作者:S. D. Weaver , T. R. Ireland ...
来源:[J].New Zealand Journal of Geology and Geophysics(IF 0.475), 1997, Vol.40 (1), pp.1-17
摘要:Abstract(#br)Detailed geological mapping, petrography, geochemistry, and geochronological studies in the Hohonu Batholith, North Westland, have identified 10 granitoid plutons emplaced during three intrusive episodes. The earliest episode is represented by a single dated Pal...
作者:S. W. Beresford , J. W. Cole , S. D. Weaver
来源:[J].New Zealand Journal of Geology and Geophysics(IF 0.475), 2000, Vol.43 (4), pp.639-650
摘要:Abstract(#br)The 0.23 Ma Kaingaroa Ignimbrite is a composite, multiple flow‐unit ignimbrite erupted from the Reporoa Caldera, Taupo Volcanic Zone, New Zealand. Reporoa Caldera evolved from a single vent during the initial stages of the Kaingaroa eruption, to a trapdoor calde...
作者:... M. Gutjahr , S. D. Weaver , K. N. Bassett
来源:[J].Australian Journal of Earth Sciences(IF 1.468), 2009, Vol.56 (4), pp.587-594
摘要:Data from New Zealand and northern Victoria Land, Antarctica, indicate that the Cambrian Takaka Terrane intra-oceanic arc/backarc assemblage and the Bowers Terrane intra-oceanic arc/back-arc assemblage were accreted to the Gondwana margin by the Late Cambrian. Compelling similari...
作者:S. D. Weaver , J. D. Bradshaw ...
来源:[J].New Zealand Journal of Geology and Geophysics(IF 0.475), 1997, Vol.40 (4), pp.453-463
摘要:Abstract(#br)Ion microprobe U‐Pb zircon ages have been obtained from four samples of Cretaceous granitoid and two samples of volcanogenic sediment from the northwest Nelson‐Westland region of the South Island of New Zealand. Crow Granite, which intrudes lower Paleozoic metas...
作者:S. D. Weaver , D. Shelley
来源:[J].New Zealand Journal of Geology and Geophysics(IF 0.475), 1998, Vol.41 (1), pp.1-14
摘要:Abstract(#br)The Early Cretaceous Darran Complex of the Median Tectonic Zone near Milford, South Island, New Zealand, consists dominantly of biotite ‐ two‐pyroxene diorites cut by biotite‐hornblende microdiorite and quartz monzodiorite dikes. The host diorite gives a 13...
作者:S. D. Weaver , J. D. Bradshaw ...
来源:[J].New Zealand Journal of Geology and Geophysics(IF 0.475), 2007, Vol.50 (3), pp.167-180
摘要:Abstract(#br)New SHRIMP U‐Pb ages and geochemical data have been obtained for the volcano‐sedimentary Loch Burn Formation (LBF). A rhyolitic clast from the tops of the Stuart Mountains gave a SHRIMP age of 150.3 ± 1.9 Ma, and a very fine sandstone from the same area was...
作者:S. D. Weaver
来源:[J].Bulletin Volcanologique(IF 2.653), 1977, Vol.40 (4), pp.209-230
摘要:Abstract(#br)Emuruangogolak is a Quaternary basalitrachyte volcano situated in the Suguta graben of the northern Kenva rift, and probably erupted last early in this century. Following the construction of an early trachytic shield volcano, two episodes of caldera collapse occ...
作者:S. D. Weaver , J. S. C. Sceal , I. L. Gibson
来源:[J].Contributions to Mineralogy and Petrology(IF 3.476), 1972, Vol.36 (3), pp.181-194
摘要:Abstract(#br)Determination of the trace-elements Ba, Ce, La, Nb, Rb, Sr and Zr have been made on lavas from six trachytic and pantelleritic volcanoes in the Kenyan and Ethiopian Rifts. Consideration of these data shows that Ce, La, Nb and Zr have behaved as truly residual element...

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