A large, .distinct negative aeromagnetic anomaly of over 2000 nT associated with microcline-sillimanite-quartz gneisses in the Russell area, northwest Adirondack Mountains, was previously shown to be remanence-dominated, although the carriers of remanence were not well documented. Russell Belt gneisses have a strong natural remanent magnetization with steep remanence directions, D = 263 ø, I = ...

Integrated metamorphic and geochronological data place new constraints on the metamorphic evolution of a Neoproterozoic orogen in east Antarctica. Granulite-facies rocks from a 150 km stretch of the Kemp Land coast reflect peak conditions involving T 870^9908C at P 7 4^10 kbar, with pressure increasing westward towards an Archaean craton. Electron microprobe-derived (ThþU)^Pb monazite ages from...

Garnet-whole rock and garnet-mineral isochrons were determined on granulite facies gneisses and amphibolites from the Archean Pikwitonei Granulite Domain of the Superior Province, and the Proterozoic Central Gneiss Belt and Adirondack Highlands of the Grenville orogen. The Sm-Nd ages obtained from Archean garnets 0.1-0.5 cm in length are 30-110 Ma younger than the U-Pb ages obtained on the same...

The Bitlis-Pötürge Massif of SE Turkey is a metamorphic belt separating the Arabian Plate from Taurides. It includes non-metamorphic Palaeozoic sequence that contains locally fossiliferous strata. Here reported for first time an assemblage Upper Devonian rugose and tabulate corals Meydan Formation, composed Frechastraea schafferi (PENECKE), Peneckiella cf. teicherti HILL, Pseudopexiphyllum supr...

The hinterland of the Cenozoic Northern Apennines fold-and-thrust belt exposes metamorphic roots chain, vestiges subduction-related tectono-metamorphic evolution that led to buildup Alpine orogeny in Mediterranean region. Like other peri-Mediterranean belts, Palaeozoic continental basement is still poorly constrained, hampering full understanding their orogenic evolution. We report first compre...