Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5175
AuthorsCocchi, L.* 
Caratori Tontini, F.* 
Muccini, F.* 
Marani, M. P.* 
Bortoluzzi, G.* 
Carmisciano, C.* 
TitleChronology of the transition from a spreading ridge to an accretional seamount in the Marsili backarc basin (Tyrrhenian Sea)
Issue Date9-Sep-2009
Series/Report no./21 (2009)
DOI10.1111/j.1365-3121.2009.00891.x
URIhttp://hdl.handle.net/2122/5175
KeywordsTyrrhenian Sea
Marsili Seamount
Magnetic Anomalies
Slab Tear
Chronology
Subject Classification04. Solid Earth::04.04. Geology::04.04.02. Geochronology 
04. Solid Earth::04.04. Geology::04.04.04. Marine geology 
04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies 
AbstractInversion of new high-resolution magnetic data from the Marsili seamount and the surrounding basin in the Tyrrhenian Sea reveals NNE–SSW magnetization stripes ranging from the Matuyama chron to the Brunhes chron, including the short positive Jaramillo subchron. The detailed magnetic chronology shows that from the late Matuyama (1.77 Ma), the average half spreading rate was about 1.5 cm yr-1, with a slight decrease between the Jaramillo and the Brunhes events, when the growth of the volcanic edifice overcame lateral spreading. Analysis of spreading rate and volume of erupted lava indicates that at the beginning of the Jaramillo subchron (1.07 Ma), the Marsili basin evolved from pure horizontal spreading to a superinflated seamount as a consequence of tearing of the Ionian slab. Our data give us a snapshot of the geodynamic transition from an active backarc spreading phase to the vertical accretion of the seafloor because of a radical change in the subduction dynamics.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
ter_891-cocchi.pdfmain article2.99 MBAdobe PDFView/Open
Show full item record

Page view(s)

178
Last Week
1
Last month
1
checked on Jul 25, 2017

Download(s)

42
checked on Jul 25, 2017

Google ScholarTM

Check

Altmetric