Motukoreaite; a common alteration product in submarine basalts

Motukoreaite occurs in fractures and amygdales in hyaloclastite dredged from the western Mediterranean. It apparently forms as a low-T alteration product during sea-water-basaltic glass interaction. Microprobe chemical analyses and the complete XRD powder pattern of motukoreaite are reported to enab...

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Veröffentlicht in:	The American mineralogist 1989-10, Vol.74 (9-10), p.1054-1058
Hauptverfasser:	Zamarreño, Isabel, Plana, Feliciano, Vazquez, Antonio, Clague, David A
Format:	Artikel
Sprache:	eng
Schlagworte:	alteration basalts cell dimensions chemical composition crystal growth electron probe data Emile Baudot Bank glasses halmyrolysis hyaloclastite hydrates hydrothermal alteration igneous and metamorphic rocks igneous rocks low temperature Marine marine environment Mediterranean Sea metasomatism Mineralogy minerals motukoreaite nonsilicates petrology processes pyroclastics seamounts SEM data submarine environment sulfates temperature volcanic glass volcanic rocks West Mediterranean X-ray diffraction data
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Beschreibung
Zusammenfassung:	Motukoreaite occurs in fractures and amygdales in hyaloclastite dredged from the western Mediterranean. It apparently forms as a low-T alteration product during sea-water-basaltic glass interaction. Microprobe chemical analyses and the complete XRD powder pattern of motukoreaite are reported to enable unambiguous identification in future work on submarine alteration of basaltic glasses.
ISSN:	0003-004X 1945-3027