 | | Journal (issue) | | from a new find at the Dolores prospect in Murcia Province, southeastern Spain. The new mineral, as it occurs...varying a bit in composition: Barahonaite-(Fe) (Ca,Cu,Na,Fe3+,Al)12Fe3+2(AsO4)8(OH)x·nH2O is yellow...composite crystals, up to 20 µm long. Barahonaite-(Al) (Ca,Cu,Al,Na)12Al2(AsO4)8(OH)x·nH2O is pale blue in...minerals involved are as follows: Diopside Ca Mg Si2 O6 Augite (Ca,Na) (Mg,Fe,Al,Ti) (Si,Al)2 O6 Judging from...composed of four end members: Diopside Ca Mg Si2 O6 Hedenbergite Ca Fe Si2 O6 Clinoenstatite Mg2 Si2 O6 |  | | Journal (article/letter/editorial) | | Augustine volcano, Alaska, and Mt. Somma-Vesuvius, Italy. References Botcharnikov, R.E., Behrens, H., Holtz...Geological Sci., Univ. of California, Santa Barbara, CA 93106 (spera@geol.ucsb.edu) Energy-Constrained Eruption...(An<10Ab62-66Or28-34), followed by euhedral overgrowths with either Ca or K-rich compositions; the Anrich zones are An7-13Ab66-68Or14-20...composition as these Ca-rich overgrowths. A second flow has a number of feldspars with Ca-rich cores and another...rims of An8Ab65Or28. Finally, a fourth type has a Ca-rich part (An50Ab50Or0), also with melt inclusions |
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Montresta, Oristano Province, Sardinia, Italy