oceanite

• Survey map (1)
• Occurrences (2)
• Photos and Images (1)
  •     Images (table view)
  •     Image reel
  •     Gallery
  •     Rock images by locality
  •     Slave rock images

Ultrabasisches Gestein - ein Pikritischer Basalt / Picrobasalt.

Frankreich/Réunion/Piton de la Fournaise

Erstbeschreibung durch Lacroix 1923 vom Schildvulkan Piton de la Fournaise im Osten der Insel Réunion (Indischer Ozean).

Ein melanokrater pikritischer Basalt mit einem hohen Anteil (20 – 50 vol. %) an Olivin-Phänokristallen und einem geringeren Anteil an Augit-Phänokristallen in einer Grundmasse aus Augit, Olivin und Plagioklas. Akzessorisch treten Chromit, Ilmenit, Magnesiochromite und Titanomagnetit hinzu.

Literatur

• Maaløe, Sven, Hansen, Birger (1982) Olivine phenocrysts of Hawaiian olivine tholeiite and oceanite. Contributions to Mineralogy and Petrology, 81 (3). 203-211 doi:10.1007/bf00371297
• Clocchiatti, R., Havette, A. & Nativel, P., 1979: Petrogenetic relations between transitional basalts and oceanites from trapped melts in olivine and chromespinel phenocrysts of Piton de la Fournaise (Reunion Island, Indian ocean). Bull. Mineral., 102, 511-525.
• Cohen. A.S, O´nions, R.K. & Kurz, M.D., 1996: Chemical and isotopic variations in Mauna Loa tholeiites. Earth Planetary Science Letters, 143, 111-124.
• Le Bas, M. J., 2000: IUGS Reclassification of the High-Mg and Picritic Volcanic Rocks. Journal of Petrology, 41, 1467-1470.
• MacDonald, G.A. & Katsura, T., 1961: Variations in the lava of the 1959 eruption in Kilauea Iki. Pacific Sci., 15, 358-369.
• Norman, M.D. & Garcia, M.O, 1999: Primitive magmas and source characteristics of the Hawaiian plume: Petrology and geochemistry of shield picrites. Earth Planetary Science Letters, 168, 27-44.
• Rhodes, J.M., 1995: The 1852 and 1868 Mauna Loa picrite eruptions: Clues to paental magma compositons and the magmatic plumbing system. In: Rhodes, J.M. & Lockwood: Mauna Loa Revealed: Structure, composition, history and hazards. American Geophysical Union,Washington, D.C., 241-262.
• Sobolev, A.V. & Nikogosian, I.K, 1994: Petrology of long-lived mantle plume magmatism: Hawaii, Pacific, and Reunion Island, Indian ocean. Petrology, 2, 111-144.
• Welsch, B., Faure, F., Famin, V., Baronnet, A. & Bachelery, P., 2013: Dendritic crystallization: A single process for all the textures of olivine in basalts? Journal of Petrology, 54, 539-574.
• Wilkinson, J.F.G., & Hensel, H. D., 1988: The petrology of some picrites from Mauna Loa and Kilauea volcanoes, Hawaii. Contribution to Mineralogy and Petrology, 98, 326–345.