Paleomagnetism and paleogeography of Jurassic radiolarian cherts from the northern Apennines of Italy

Research Article| April 01, 2001 Paleomagnetism and paleogeography of Jurassic radiolarian cherts from the northern Apennines of Italy I.W. Aiello; I.W. Aiello 1Consiglio Nazionale delle Ricerche, Centro di Studio dell'Appennino e delle Catene Perimediterranee, Florence 50121, Italy Search for other works by this author on: GSW Google Scholar J.T. Hagstrum J.T. Hagstrum 2U.S. Geological Survey, Menlo Park, California 94025, USA Search for other works by this author on: GSW Google Scholar Author and Article Information I.W. Aiello 1Consiglio Nazionale delle Ricerche, Centro di Studio dell'Appennino e delle Catene Perimediterranee, Florence 50121, Italy J.T. Hagstrum 2U.S. Geological Survey, Menlo Park, California 94025, USA Publisher: Geological Society of America Received: 17 Aug 1999 Revision Received: 06 Apr 2000 Accepted: 16 May 2000 First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2001) 113 (4): 469–481. https://doi.org/10.1130/0016-7606(2001)113<0469:PAPOJR>2.0.CO;2 Article history Received: 17 Aug 1999 Revision Received: 06 Apr 2000 Accepted: 16 May 2000 First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation I.W. Aiello, J.T. Hagstrum; Paleomagnetism and paleogeography of Jurassic radiolarian cherts from the northern Apennines of Italy. GSA Bulletin 2001;; 113 (4): 469–481. doi: https://doi.org/10.1130/0016-7606(2001)113<0469:PAPOJR>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 Oriented samples of Jurassic radiolarian chert were collected from the Tuscan domain (continental margin) and the Ligurid domain (oceanic) of the northern Apennines for paleomagnetic study to determine the paleogeographic origins of these rocks. The oceanic rocks are all thermochemically overprinted by a mostly reversed-polarity component of magnetization (B) that was likely acquired during late Miocene regional uplift of the northern Apennines. This component also dominates the lower brittle chert of the Tuscan Cherts, but disappears upsection in the more clay-rich and ductile siliceous marlstones. In addition, the Tuscan Cherts retain an inferred primary magnetization (C), isolated at temperatures between 560 and 660 °C, which passes a fold test and shows a polarity stratigraphy. This component indicates a paleolatitude of 11° ± 4°N, and a counterclockwise vertical-axis rotation of 29° ± 9° with respect to the southern Alps of Italy, of 49° ± 8° with respect to Africa, and of 91° ± 8° with respect to Eurasia. Our results suggest that the Tuscan domain was farther south than other deep-water continental margin sections of Adria, and that transcurrent faulting might have played a significant role in the orogenic evolution of the northern Apennines. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.