Chemical and mineral composition of rocks and sediments from the Amirante Arc
| Cobertura |
MEDIAN LATITUDE: -7.164144 * MEDIAN LONGITUDE: 53.052508 * SOUTH-BOUND LATITUDE: -8.565000 * WEST-BOUND LONGITUDE: 52.541700 * NORTH-BOUND LATITUDE: -2.083300 * EAST-BOUND LONGITUDE: 56.483300 |
|---|---|
| Data(s) |
19/02/1997
|
| Resumo |
New geological and geophysical data on the Amirante Arc, which locates to the south of the Seychelles Islands, are presented. These data were obtained by Pacific Oceanological Institute during the 33-rd cruise of R/V Professor Bogorov in 1990. The Amirante Arc represents a seamount chain, which has submeridional strike and total length about 400 km. To the west of the Amirante Arc there are a deep sea trench and a back-arc basin, i.e. this area is characterized by structural elements associated with the subduction zone of Western Pacific type. According to our data the Amirante Arc is composed by tholeiites of ocean plateau type. This facts are evidences that the Amirante Arc differs from typical Pacific island arcs. This gives an opportunity to distinguish a special type of oceanic structures, i.e. non-volcanic (amagmatic) ridges. The Amirante Ridge has been probably formed as a result of oceanic crust heaping due to horizontal displacements of its blocks in the process of spreding ridge formation in the Indian Ocean during Cretaceous-Paleogene. |
| Formato |
application/zip, 14 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.733955 doi:10.1594/PANGAEA.733955 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Relação |
Derkachev, AN; Botsul, AI; Nikolaeva, NA (1997): Quaternary deposits and features of their mineral composition. In: Lelikov, E.P. (Ed.), Geological Structure of the Amirante Arc in the Indian Ocean; Dal'nauka (Vladivostok), 129-146 Sedin, VT; Tatarin, IA; Badredinov, ZG; Chubarov, Valerii M (1997): Magmatic rocks of the Northern and Central blocks. In: Lelikov, E.P. (Ed.), Geological Structure of the Amirante Arc in the Indian Ocean; Dal'nauka (Vladivostok), 49-69 Tatarin, IA; Badredinov, ZG; Sedin, VT; Chubarov, Valerii M (1997): Magmatic rocks of the Southern block. In: Lelikov, E.P. (Ed.), Geological Structure of the Amirante Arc in the Indian Ocean; Dal'nauka (Vladivostok), 70-96 |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Far East Geological Institute, Far East Division, Russian Academy of Sciences Supplement to: FEGI Team (1997): Geological Structure of the Amirante Arc in the Indian Ocean. Vladivostok, Dal'nauka (E.P. Lelikov, Ed.), 162 pp |
| Palavras-Chave | #2786; 2787; 2790; 2791; 2792; 2798; 2799; 2800; 2801; 2802; 2803; 2804; 2806; 2807; 2813; 2814; 2815; 85A1; 85A11; 85A12; 85A27; 85A3; 85A30; 85A33; 85A4; 85A48; 85A5; 85A51; 85A6; 85A8; Act; Actinolite; Al2O3; Aluminium oxide; Amirante Arc, Western Indian Ocean; Amp; Amphibole; Analcime; Anl; Ap; Apatite; Archive of Ocean Data; ARCOD; Area; Area/locality; Ba; Barium; Brk; Brookite; Cal; Calcite; Calcium oxide; Calculated; CaO; Ce; Cerium; Chl; Chlorite; Chloritoid; Chromium; Chromium(III) oxide; Chromium number; Cld; Clinopyroxene; Co; Cobalt; Comment; Counting, binocular; Cpx; Cr; Cr/(Cr + Al); Cr2O3; Dredge; DRG; Ep; Epidote; Event; expressed as ZnO; Fe(3+)/[Fe(3+)+Fe(2+)]; Fe2O3; Fe3+/Fetotal; Fe3O4; FeO; Fl; Fluorite; Garnet; Grab; GRAB; Grt; Hbl; Hornblende; Hydromica; Ilm; Ilmenite; Iron 3+/Iron total; Iron oxide, Fe2O3; Iron oxide, FeO; K2O; La; Label; Label 2; Lanthanum; LOI; Loss of ignition analysis; Loss on ignition; M-1; Magnesium number; Magnesium oxide; Magnetite; Mahe Island, Seychellen; Manganese oxide; Measured under a microscope using an ocular micrometer; Mg/(Mg + Fe); Mg/[Mg+Fe(2+)]; MgO; Mica; Microprobe; MnO; Mnz; Monazite; Na2O; Na-amphibole; Nb; Nd; Neodymium; Ni; Nickel; Nickel oxide; NiO; Niobium; Opx; Orthopyroxene; P-1; P-2; P2O5; P-3; P-4; PB-33; PB-33-2786; PB-33-2787; PB-33-2790; PB-33-2791; PB-33-2792; PB-33-2798; PB-33-2799; PB-33-2800; PB-33-2801; PB-33-2802; PB-33-2803; PB-33-2804; PB-33-2806; PB-33-2807; PB-33-2813; PB-33-2814; PB-33-2815; Phillipsite; Phosph; Phosphorite; Phosphorus oxide; Php; Pl; Plagioclase; Potassium oxide; Praslin Island, Seychellen; Professor Bogorov; Py; Pyrite, FeS2; Pyrox; Pyroxene; Quantitative emission spectral analysis; Quartz; Qz; Rb; Rock; Rock fragm; Rock fragments; Rock type; Rubidium; Sample code/label; Sample code/label 2; Sample type; Samp type; Serpentine; Seychell Bank, Western Indian Ocean; Silicon dioxide; SiO2; Slope of Alphonse Island, Seychellen; Slope of Coetivy Island, Seychellen; Slope of Deroches Island, Seychellen; Sme; Smectite; Sodium oxide; Sphene; Spn; Sr; Srp; Stb; Stilbite; Strontium; Structure; Sum; Talc; TiO2; Titanium oxide; Tlc; Tourmaline; Tur; V; Vanadium; Western Indian Ocean; Wet chemistry; X-ray radiometry; X-ray spectrometry; Y; Yttrium; Zeo; Zeolite; Zinc; Zircon; Zirconium; Zn; Zr; Zrn |
| Tipo |
Dataset |
