Ankaramite Explained
Ankaramite is volcanic rock type of mafic composition. It is a dark porphyritic variety of basanite containing abundant pyroxene and olivine phenocrysts.[1] It contains minor amounts of plagioclase and accessory biotite, apatite, and iron oxides.
Its type locality is Ankaramy in Madagascar. It was first described in 1916.[1] It is also found in the Sierra de Guanajuato of Central Mexico,[1] the South Pacific on islands such as Tahiti, Rarotonga, Samoa and in the Zealandia, Alexandra Volcanic Group.[2]
Notes and References
- https://dialnet.unirioja.es/descarga/articulo/281059.pdf Luis Enrique Ortiz Hernández, An Arc Ankaramite Occurrence in Central Mexico, Revista Mexicana de Ciencias Geológicas, volumen 17, número 1 2000, p. 34-44
- Adrian . Pittari . Marlena L. . Prentice . Oliver E. . McLeod . Elham Yousef. Zadeh . Peter J. J. . Kamp . Martin . Danišík . Kirsty A. . Vincent . 2021 . Inception of the modern North Island (New Zealand) volcanic setting: spatio-temporal patterns of volcanism between 3.0 and 0.9 Ma . New Zealand Journal of Geology and Geophysics . 64 . 2–3 . 250–272 . 10.1080/00288306.2021.1915343 . 2021NZJGG..64..250P . 235736318 .
