Geochemistry of ODP Site 125-786 volcanic rocks
| Cobertura |
MEDIAN LATITUDE: 31.874600 * MEDIAN LONGITUDE: 141.226250 * SOUTH-BOUND LATITUDE: 31.874200 * WEST-BOUND LONGITUDE: 141.226000 * NORTH-BOUND LATITUDE: 31.875000 * EAST-BOUND LONGITUDE: 141.226500 * DATE/TIME START: 1989-04-04T00:00:00 * DATE/TIME END: 1989-04-16T17:00:00 |
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| Data(s) |
06/09/1992
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| Resumo |
Eocene-Oligocene volcanic rocks drilled at Site 786 in the Izu-Bonin forearc cover a wide range of compositions from primitive boninites to highly evolved rhyolites. K-Ar dating reveals at least two distinct episodes of magmatism; one at 41 Ma and a later one at 35 Ma. The early episode produced low-Ca boninites and bronzite andesites that form an oceanic basement of pillow lavas and composite intrusive sheets, overlain by flows and intrusive sheets of intermediate-Ca boninites and bronzite-andesites and a fractionated series of andesites, dacites, and rhyolites. The later episode produced high-Ca boninites and intermediate-Ca boninites, exclusively as intrusive sheets. |
| Formato |
application/zip, 3 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.769653 doi:10.1594/PANGAEA.769653 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Murton, Bramley J; Peate, David W; Arculus, Richard J; Pearce, Julian A; van der Laan, Sieger R (1992): Trace-element geochemistry of volcanic rocks from Site 786: the Izu-Bonin Forearc. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 211-235, doi:10.2973/odp.proc.sr.125.133.1992 |
| Palavras-Chave | #125-786; 125-786A; 125-786B; Al2O3; Aluminium oxide; Ba; Barium; Caesium; Calcium oxide; CaO; Ce; Cerium; chemical; Chromium; Co; Cobalt; COMPCORE; Composite Core; Copper; Cr; Cs; Cu; Depth; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Dy; Dysprosium; Er; Erbium; Eu; Europium; Event; Fe2O3; Ga; Gadolinium; Gallium; Gd; Hafnium; Hf; Ho; Holmium; ICP-MS, Inductively coupled plasma - mass spectrometry; Instrumental neutron activation analysis (INAA) (Reimann et al., 1998); Iron oxide, Fe2O3; Joides Resolution; K2O; La; Lab; Laboratory; Lanthanum; Lead; Leg125; Lithologic unit/sequence; LOI; Loss on ignition; Lu; Lutetium; magma series; Magnesium oxide; Manganese; Manganese oxide; MgO; missing values = sample crushed in tungsten carbide; Mn; MnO; Na2O; Nb; Nd; Neodymium; Ni; Nickel; Niobium; North Pacific Ocean; Ocean Drilling Program; ODP; ODP sample designation; P2O5; Pb; Phosphorus oxide; Potassium oxide; Pr; Praseodymium; Rb; Rock; Rock type; Rubidium; Samarium; Samp com; Sample code/label; Sample comment; Sc; Scandium; Silicon dioxide; SiO2; Sm; Sodium oxide; Sr; Strontium; Sulphur, total; Ta; Tantalum; Tb; TbY; Terbium; Th; Thorium; Thulium; Ti; TiO2; Titanium; Titanium oxide; Tm; TS; U; Unit; Uranium; V; Vanadium; X-ray fluorescence (XRF); Y; Yb; Ytterbium; Yttrium; Zinc; Zirconium; Zn; Zr |
| Tipo |
Dataset |
