1,721,062 research outputs found
New Standardized illite crystallinity data from low - to very-low grade metamorphic rocks (Northern Apennines, Italy)
No full textHeavy metals and Arsenic in sediments from the continental shelf of the northern Tyrrhenian/eastern Ligurian seas
No full textExperimentally measured mass absorption coefficients in quantitative X-ray diffraction analysis
No full textHeavy metal and arsenic distribution in sediments of the Elba- Argentario basin, southern Tuscany, Italy
No full textA simple technique for correcting diffraction intensities for the effects of preferred orientation in calcite samples
No full textThermometamorphism in the Campiglia Marittima aureole (Southern Tuscany, Italy)
No full textContact metamorphism of carbonate rocks surrounding the Campiglia Marittima granite (southern Tuscany, Italy) has been investigated. The study was performed mainly on rock samples collected from a borehole which reached the magmatic body about 220 m below the surface. The calcite-dolomite geothertmometer was used to estimate metamorphic temperatures. Although carbonates appear largely re-equilibrated during the late stages of metamorphism, the distribution of temperatures and parageneses indicates that the rocks of the aureole were affected by at least two main, distinct metamorphic events. Moving from the outer zones to the contact with the magmatic body, the first and more intense metamorphic event is characterized by formation of the mineral succession tremolite-diopside-forsterite, and temperatures ranging from 430 to 550 °C. The second event appears to have occurred at lower and more uniform temperatures (about 350 °C) and is characterized by the occurrence of a widespread Tlc ± Qtz ± Srpt ± Cal mineral assemblage, generally filling veins and cracks. Distributions of temperatures and parageneses, as well as available geological data on the Campiglia Marittima intrusion, suggest a prevalently conductive heat transfer for the first event, and a prevalently convective heat transfer for the secon
THE KUBLER INDEX IN LATE DIAGENETIC TO LOW-GRADE METAMORPHIC PELITES: A CRITICAL COMPARISON OF DATA FROM 10 A and 5 A PEAKS
No full text
Mineralogical and grain size composition of clays developing calanchi and biancane erosional landforms
No full text- …
