Earth:Ankaramite
From HandWiki
| Igneous rock | |
| Composition | |
|---|---|
| Mafic:pyroxene, olivine and plagioclase. |
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]
References
- ↑ 1.0 1.1 1.2 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
- ↑ Pittari, Adrian; Prentice, Marlena L.; McLeod, Oliver E.; Zadeh, Elham Yousef; Kamp, Peter J. J.; Danišík, Martin; Vincent, Kirsty A. (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. doi:10.1080/00288306.2021.1915343. https://fl-nzgs-media.s3.amazonaws.com/uploads/2021/08/Ref.6C-c_North-Island-NZ-VolcanicSettingBetween3.00.9MaPittari-et-al.-2021_.pdf.
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