Unknown
PANGAEA
In:
Supplement to: Watanabe, Teruo; Hirama, Tadao; Yuasa, Makoto; Terada, Shoichi; Fujioka, Kantaro (1992): Glass inclusions with microglobules in plagioclase and pyroxene phenocrysts of volcanic rocks from the Bonin Arc, Leg 126. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 171-183, https://doi.org/10.2973/odp.proc.sr.126.126.1992
Publication Date:
2024-01-09
Description:
The chemical composition of glass inclusions in phenocrystic plagioclase and pyroxene from Sites 792 and 793, drilled during Ocean Drilling Program Leg 126 in the Bonin Arc, is examined. Immiscible liquid, which is preserved as glass inclusions with unmixed textures in plagioclase, is observed in a high-magnesian andesite, which suggests an important role of liquid immiscibility in the fractionation of high-magnesian andesite. In other andesitic rocks (SiO2 = 57-60 wt%), such unmixed textures of glass inclusions in calcic plagioclase with a similar percentage of An (around 80%) is not found. The degree of fractionation and mixing of liquid are inferred from the glass composition in pyroxene.
Keywords:
126-792E; 126-793B; DRILL; Drilling/drill rig; Joides Resolution; Leg126; North Pacific Ocean; Ocean Drilling Program; ODP
Type:
Dataset
Format:
application/zip, 4 datasets
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