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...

The eclogite facies assemblage K-feldspar–jadeite–quartz in metagranites and metapelites from the SesiaLanzo Zone (Western Alps, Italy) records the equilibration pressure by dilution of the reaction jadeite+quartz=albite. The metapelites show partial transformation from a pre-Alpine assemblage of garnet (Alm63Prp26Grs10)–K-feldspar–plagioclase–biotite±sillimanite to the Eo-Alpine high-pressure ...

In this study, data from garnet-kyanite metapelites in ultrahigh-pressure (UHP) domains of the Western Gneiss Region (WGR), Norway, are presented. U–Pb geochronology and trace element compositions zircon, monazite, apatite, rutile garnet were acquired, pressure–temperature (P–T) conditions calculated using mineral equilibria forward modelling Zr-in-rutile thermometry. Garnet-kyanite gneiss Ulst...

Geostatistical and multivariate statistical analyses were applied to heavy mineral data from an Amazonian fluvial-lake system near the Tapajós River mouth investigate spatial distribution source-area of sediments. Twenty-one points investigated, physical characteristics Green Lake deepest point determined. Sand accumulates in lake margins mud quantity increases towards center. Heavy assemblage ...

The relations of fibrolite-biotite are discussed by presenting data from the Ardara aureole, NW Ireland. Biotite-fibrolite intergrowths are developed in all three aureole zones including: the outer kyanite-bearing andalusite zone, the middle kyanite-free andalusite zone and the inner prismatic sillimanite zone. A strain-assisted mechanism is proposed for the fibrolitisation of biotite in the Ar...

Geochemical profiles across chemically altered zones (selvages) surrounding amphibolite facies quartz+kyanite veins were investigated to determine major, minor, and trace element mass transfer and volume strain due to channelized fluid flow. The three profiles are perpendicular to two veins cutting the Wepawaug Schist, Connecticut, U.S.A., which underwent Barrovian-style metamorphism during the...

The conditions at which monazite and allanite were produced and destroyed during prograde metamorphism of pelitic rocks were determined in a Buchan and a Barrovian regional terrain and in a contact aureole, all from northern New England, USA. Pelites from the chlorite zone of each area contain monazite that has an inclusion-free core surrounded by a highly irregular, inclusion-rich rim. Texture...