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Pegmatitic-granitic dykes merging and diverging as they intrude calc-silicate rocks within the Karakoram Shear Zone, in Ladakh, NW India. Photo by R.F. Weinberg. The magmas were generated by partial melting at ca. 17-15 Ma, of a sequence of biotite and hornblende rich metasedimentary rocks that crop out in the region, such as those documented in the related article by Weinberg and Mark (v. 120, no. 7/8, p. 994-1009). The magmas were then expelled from their source and intruded the calcsilicate package.
A typical eclogite in the the Maobei area of Donghai County, China. Photo by Pei Ni. The red area is garnet; the green part omphacite. Black spots are rutiles disseminated in the eclogite. See related article by Ni et al. (v. 120, no. 9/10, p. 1296-1304), which discusses the features of titanium ore-forming fluids and their relation to ultrahigh-pressure (UHP) metamorphism by using the data from infrared microthermometric study of fluid inclusions in rutile from Donghai UHP eclogites.
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