Structure and petrology of the Lanzo peridotite massif (Piedmont Alps)

Research Article| October 01, 1978 Structure and petrology of the Lanzo peridotite massif (Piedmont Alps) FRANÇOISE BOUDIER FRANÇOISE BOUDIER 1Laboratoire de Tectonophysique, Université de Nantes, BP 1044 Nantes 44037, France Search for other works by this author on: GSW Google Scholar Author and Article Information FRANÇOISE BOUDIER 1Laboratoire de Tectonophysique, Université de Nantes, BP 1044 Nantes 44037, France Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1978) 89 (10): 1574–1591. https://doi.org/10.1130/0016-7606(1978)89<1574:SAPOTL>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation FRANÇOISE BOUDIER; Structure and petrology of the Lanzo peridotite massif (Piedmont Alps). GSA Bulletin 1978;; 89 (10): 1574–1591. doi: https://doi.org/10.1130/0016-7606(1978)89<1574:SAPOTL>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The Lanzo massif consists of a 150 km2 body of plagioclase Iherzolite, situated along the inner arc of the Alps, at the triple junction of the Ivrea zone, the Sesia-Lanzo zone, and the Pennine zone, Geophysical models show that the massif is probably still rooted in the mantle. A reliable study of field structures, rock structures, and mineral preferred orientations is interpreted in terms of plastic flow during the solid-state emplacement of the peridotite. The kinematics of the massif are related to the relative displacement of the South Alpine and European plates during Cretaceous time. During its solid-state emplacement, the peridotite underwent a gabbroic partial melting episode that produced dikes and lenses whose orientations are related to the flow structures. The petrology of the lherzolite and gabbros indicates that the peridotite mass originated as deep as 100 km in the mantle and crossed the lherzolite solidus at about 15 to 20 km and 1250 °C during its ascent. The pyroxenitic layering is considered from a structural and petrological point of view. The observed clinopyroxene preferred orientation is assumed to be of magmatic origin and not transposed by plastic flow. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.