• Source: Anortosit

Anortosit adalah batuan beku faneritik yang intrusif dan dicirikan dengan dominansi plagioklas felspar (90-100%) dan komponen mafik sedikit (0-10%). Piroksen, ilmenit, magnetit, dan olivin adalah mineral-mineral mafik yang paling sering hadir.
Anortosit di muka bumi dapat dibagi menjadi dua: Anortosit proterozoikum (disebut juga tipe masif anortosit) dan juga Anortosit tipe arkean. Kedua tipe ini memiliki keterjadian yang berbeda, dan muncul di periode-periode yang berbeda di sejarah bumi, dan diperkirakan memiliki asal yang berbeda.
Anortosit bulan merupakan area berwarna terang di permukaan bulan dan telah banyak diteliti oleh para ahli.




Lihat juga


Daftar tipe batuan




Referensi






Bibliografi


Bédard, Jean H. (2001). "Parental magmas of the Nain Plutonic Suite anorthosites and mafic cumulates: a trace element modelling approach". Contributions to Mineralogy and Petrology. 141 (6): 747–771. Bibcode:2001CoMP..141..747B. doi:10.1007/s004100100268.
Emslie, R. F. (1 May 1975). "Pyroxene megacrysts from anorthositic rocks: new clues to the sources and evolution of the parent magmas". Canadian Mineralogist. 13 (2): 138–145. ISSN 0008-4476.
Emslie, R. F.; Stirling, J. A. R. (1 December 1993). "Rapakivi and related granitoids of the Nain Plutonic Suite: geochemistry, mineral assemblages and fluid equilibria". Canadian Mineralogist. 31 (4): 821–847. ISSN 0008-4476.
Emslie, R. F.; Hamilton, M. A.; Theriault, R. J. (1994). "Petrogenesis of a Mid-Proterozoic Anorthosite-Mangerite-Charnockite-Granite (AMCG) Complex: Isotopic and Chemical Evidence from the Nain Plutonic Suite". Journal of Geology. 102 (5): 539–558. Bibcode:1994JG....102..539E. doi:10.1086/629697.
Longhi, John; Fram, M. S.; Vander Auwera, J.; Montieth, J. N. (1 October 1993). "Pressure effects, kinetics, and rheology of anorthositic and related magmas". American Mineralogist. 78 (9–10): 1016–1030.
Norman, M. D.; Borg, L. E.; Nyquist, L. E.; Bogard, D. D. (2003). "Chronology, geochemistry, and petrology of a ferroan noritic anorthosite clast from Descartes breccia 67215: Clues to the age, origin, structure, and impact history of the lunar crust". Meteoritics and Planetary Science. 38 (4): 645–661. Bibcode:2003M&PS...38..645N. doi:10.1111/j.1945-5100.2003.tb00031.x.
Wood, J. A.; Dickey, J. S. Jr.; Marvin, U. B.; Powell, B. N. (1970). "Lunar Anorthosites". Science. 167 (3918): 602–604. Bibcode:1970Sci...167..602W. doi:10.1126/science.167.3918.602. PMID 17781512.
Xue, S.; Morse, S. A. (1993). "Geochemistry of the Nain massif anorthosite, Labrador: Magma diversity in five intrusions". Geochimica et Cosmochimica Acta. 57 (16): 3925–3948. Bibcode:1993GeCoA..57.3925X. doi:10.1016/0016-7037(93)90344-V.
Xue, S.; Morse, S. A. (1994). "Chemical characteristics of plagioclase and pyroxene megacrysts and their significance to the petrogenesis of the Nain Anorthosites". Geochimica et Cosmochimica Acta. 58 (20): 4317–4331. Bibcode:1994GeCoA..58.4317X. doi:10.1016/0016-7037(94)90336-0.




Pranaa luar


Anorthosite Complexes (web archive)
How does anorthosite crystallize? Diarsipkan 2003-08-03 di Wayback Machine.
History of the Emplacement and Deformation of Anorthosite Bodies in the Eastern Marcy Massif, Adirondacks Mountains, New York Diarsipkan 2011-05-14 di Wayback Machine.
Anorthosite – Lunar Highland Rock Diarsipkan 2003-10-12 di Wayback Machine.
Lunar Anorthosite Specimen 60025 Photomicrographs
Mercury – Evidence for Anorthosite and Basalt from mid-Infrared Spectroscopy

Kata Kunci Pencarian:

• Anortosit
• Felspar
• Gabro
• Pra-Nektarium
• Intrusi berlapis
• Bulan
• Daftar jenis bebatuan
• Mineral silikat
• Carnokit
• 3M