Prograde eclogites.

Prograde and retrograde history of eclogites from the Eastern Blue Ridge, North Carolina, USA

The prograde metamorphism of eclogites is typically obscured by chemical equilibration at peak conditions and by partial requilibration during retrograde metamorphism. Eclogites from the Eastern Blue Ridge of North Carolina retain evidence of their prograde path in the form of inclusions preserved in garnet. These eclogites, from the vicinity of Bakersville, North Carolina, USA are primarily co...

Eclogites in the Sclm: Are Any Subducted?

W.L. Griffin, Suzanne Y. O'Reilly and N.J. Pearson GEMOC, Dept of Earth and Planetary Sciences, Macquarie University, NSW 2109, Australia [email protected] It has become conventional wisdom that xenoliths of eclogite and garnet pyroxenite derived from cratonic subcontinental lithospheric mantle (SCLM) represent fragments of subducted ocean floor, implying that the SCLM has grown by a litho...

Eclogites, Pyroxene Geothermn, and Layered Mantle Conve!tion

consumption of '2C-CH4. Such fractionation may occur to dissolve methane transported more slowly through the 7-to 25-cm-thick sedinent cover over-lying the methane production zone via molecular diffusion or to mthane bubbles that become lodged in overyling sulfate-reducing sediments between low-tide bubbling episodes. Gas bubble methane transport in our site accounts for approximately 84% of th...

Retrograde versus Prograde Models of Accreting Black Holes

Metasomatized Kyanite-eclogites xenoliths from a southern Indian kimberlite

Kimberlites discovered so far in southern India are restricted to the Eastern Block of the Dharwar Craton and are distributed in three fields: Wajrakarur, Narayanpet, and Raipur. As summarized recently by Paul et al. (2006) and Patel et al. (2006), known kimberlite pipes in the Wajrakarur kimberlite field (WKF), which lies at the western margin of the Cuddapah Basin, occur in three clusters: Wa...