This paper is a complement to the Tectonometamorphic Map of the Canadian Shield, and contains a brief description of the metamorphic history of Proterozoic orogenic belts and rock sequences in the Canadian Shield in Ontario, with a focus on rocks of the Southern and Grenville provinces. Metamorphism in the Southern Province has generally been attributed to the Penokean orogeny (~1879–1820 Ma), ...

Pore difference characteristics and adsorption/desorption experiments of primary coal with different degrees were explored to study the pore structure gas desorption. The results show that volume increases increase in degree metamorphism. In metamorphism, distribution micropores, small pores, medium-sized pores (by volume) is WY < PM CY. large visible was > According law metamorphic coals, aver...

The P-T conditions of both equilibria were determined precisely by reversal experiments in a piston-cylinder apparatus. On the basis of 8 experiments, brackets for the rutile-magnesite-geikielite equilibrium are 7.0–7.1 kbar at 800 ∞C, 8.6–8.7 kbar at 850 ∞C, and 10.5–10.7 kbar at 900 ∞C. On the basis of 9 experiments, brackets for the zircon-magnesite-baddeleyite-forsterite equilibrium are 7.1...

The Lower Llandoverian metasedimentary rocks of the Prades Mountains, southwestern Catalonia, Spain, consist of interstratified anorthite-rich beds, chert beds, phosphate beds, sulfide-rich black shale (with mainly pyrrhotite and minor chalcopyrite), massive sulfide lenses and calc-silicate beds. These metasedimentary rocks are anomalously enriched in V and Cr, and have disseminated minerals of...

Abstract Since the Jurassic, there has been a clear spatiotemporal correlation between different types of metamorphism and active convergent plate margins. However, extent to which this relationship extends into past is poorly understood. We compared paleogeographic reconstructions inferred kinematics with age thermobaric ratio (temperature/pressure [T/P]) over 2 b.y. The null hypothesis—that n...

Triassic eclogite and blueschist facies rocks occur as a thrust sheet, 25-km long and over 2-km thick, in an Eocene fold-andthrust belt in northwest Turkey along the İzmir–Ankara suture. The thrust sheet consists mainly of metabasites with minor marble, phyllite and metachert, and rare lenses of serpentinite. The common blueschist facies mineral assemblage in the metabasites is sodic amphibole ...

among 14,102 patients admitted in teaching hospitals of the isfahan medical school, whose records were studied, 2,122 or 15.4% of patients had high blood pressure. the most common reason for blood pressure in this group was diseases of the kidney and for those, glomerolonephritis and pilonephrititis were important causes. among patients under 30 years old, high blood pressure was twice as commo...