caa a22 4500 469057092 CHVBK 20180323132847.0 cr unu---uuuuu 170328e19920601xx s 000 0 ita 10.1007/BF03002971 doi (NATIONALLICENCE)springer-10.1007/BF03002971 Schiavinato G. Dipartimento di Scienze della Terra - Sezione di Mineralogia Università degli Studi di Milano Via S. Botticelli, 23 - 20133, Milano aut Il microgabbro in val cavallina (pezzaze, prealpi bresciane): Caratteri chimici e mineralogici [Elektronische Daten] [G. Schiavinato] Chemical and mineralogical characters of a microgabbro plug in Val Cavallina (Pezzaze, Prealps) Not far from Brescia, a microgabbro plug crops out within the Southern Alpine Basement schists, next to the Val Trompia Line, an important extensional lineament of Variscan age which underwent compressive reactivation during Alpine age. The rock type shows ophitic texture and is composed of calcic clinopyroxene of diopside type and sodic plagioclase, minor Ti-rich biotite; accessory minerals are apatite, Fe-Ti oxides and zircon. Secondary minerals as epidote, Ti-poor biotite, sericite, chlorite, and plagioclase with anomalous composition are ascribed to post-magmatic alteration processes. The geochemical characteristics of the rock indicate moderate SiO2 undersaturation and alkali enrichment. According to the primary mineral association, the rock type may be ascribed to a mildly alkaline series. Immobile elements suggest the emplacement of the plug in a within-plate geodynamic environment. The time relationship between the microgabbro plug and the Permian and Triassic magmatites outcropping in the adiacent areas need to be better known. Accademia nazionale dei Lincei, 1992 Microgabbro nationallicence Mineral chemistry nationallicence Southern Alps nationallicence Italy nationallicence Rendiconti Lincei Springer-Verlag 3/2(1992-06-01), 139-149 1120-6349 3:2<139 1992 3 12210 https://doi.org/10.1007/BF03002971 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF03002971 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Schiavinato G. Dipartimento di Scienze della Terra - Sezione di Mineralogia Università degli Studi di Milano Via S. Botticelli, 23 - 20133, Milano aut NATIONALLICENCE 773 0- Rendiconti Lincei Springer-Verlag 3/2(1992-06-01), 139-149 1120-6349 3:2<139 1992 3 12210 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer