 | KIENAST, J. R., LOMBARDO, B., BIINO, C., PINARDON, J. L. (1991) Petrology of very-high-pressure eclogitic rocks from the Brossasco-Isasca Complex, Dora-Maira Massif, Italian Western Alps. Journal of Metamorphic Geology, 9 (1) 19-34 doi:10.1111/j.1525-1314.1991.tb00502.x | Journal (article/letter/editorial) | | Terra, Via Valperga Caluso 37, 1-70725 Torino, Italy Mineralogisch-Petrographisches Institut, Universitat...Dora-Maira Massif between Brossasco, Isasca and Martiniana (Italian Western Alps) and for a sodic whiteschist...associated with the pyrope-coesite whiteschists of Martiniana. The Brossasco-Isasca (BI) eclogites are fine...associated with leucocratic layers with quartz, jadeite and garnet. These features differentiate the BI...little acmite and virtually no AI'", and impure jadeite in the leucocratic layers and in the sodic whiteschist |  | | Journal (article/letter/editorial) | | of Torino, 35 Via Valperga Caluso, 10125 Torino, Italy b Department of Geology and Mineralogy, Graduate...—APolymetamorphic complexB, Ž3a. Kyanite–almandine–phengite–jadeite paraschist; Ž3b. Main marble intercalations; Ž3c...eclogite; Ž8. Retrogressed eclogite; Ž9. Kyaniteq jadeite association; Ž10. Metagranitoid relic; Ž11. Relic.... Locality symbols—B: Village of Brossasco; CR: Case Ramello; Is: Village of Isasca; SC: San Chiaffredo...mainly composed of kyanite–almandine–phengite " jadeite paraschist with marble and eclogite intercalations |  | | Journal (article/letter/editorial) | | metamorphism in the Dora Maira Massif (western AIp$, Italy), using an ultra-violet laser ablation microprobe...older than the true closure age. In the present case, some ages in the range 60-110 Ma could be explained...in the range 380-304 Ma obtained on gneisses at Parigi, a few kilometers to the north (Tilton et al. 1991)...with phengite(Ph) + Bio + Kfd + albite(Ab) + Qz + jadeite(Jd) + garnet(Gt) + rutile(Rt). A complete review...high temperature HP eclogitic unit composed of: 2 Parigi fine grain and augen gneisses with coesitepyrope |  | | Journal (article/letter/editorial) | | Torino, Via Valperga Caluso 35, I-10125 Torino, Italy (simona.ferrando@unito.it) 2 Department of Earth...University of Siena, Via Laterina 8, I-53100 Siena, Italy 3 Department of Earth Sciences, University of Perugia...Perugia, P.zza Università 1, I-06100 Perugia, Italy ABSTRACT The ultrahigh-pressure pyrope whiteschists...BIU whiteschists, in particular from the Po Valley in Italy, have constrained a P–T evolution characterized...collected from the classic locality of Case Ramello (i.e. Case Parigi of Chopin, 1984) and from a new sampling |  | | Journal (article/letter/editorial) | | in the BrossascoIsasca unit of the Western Alps, Italy. This unit is composed of a basement that underwent...predicted by Stacey and Kramers (1975) model, but in the case of monazite with high f206 the common Pb composition...from the whiteschist lens that outcrop at the Case Parigi locality (Chopin 1984; Schertl and Schreyer 2008)...during Alpine HP to UHP metamorphism. A similar case was documented for zircon within an UHP gneiss recovered...Scientific Drilling project, where coesite and jadeite were found within partially altered inherited cores |
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