Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/2278| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Nicolosi, I.; Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy | en |
| dc.contributor.authorall | Speranza, F.; Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy | en |
| dc.contributor.authorall | Chiappini, M.; Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy | en |
| dc.date.accessioned | 2007-07-03T08:57:32Z | en |
| dc.date.available | 2007-07-03T08:57:32Z | en |
| dc.date.issued | 2006 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/2278 | en |
| dc.description.abstract | Spectral analysis of both shipborne and airborne magnetic maps of the southern Tyrrhenian Sea reveals seven subparallel positive-negative magnetic anomaly stripes over the flat-lying deep floor of the Marsili oceanic basin. This represents the first evidence of oceanic magnetic anomalies in the Tyrrhenian Sea. The central positive stripe is along the Marsili seamount, a superinflated spreading ridge located at the basin axis. The stratigraphy of Ocean Drilling Program Site 650 and K/Ar ages from the Marsili seamount suggest that the Marsili Basin opened at the remarkable full-spreading rate of 19 cm/ yr between ca. 1.6 and 2.1 Ma about the Olduvai subchron. This is the highest spreading rate ever documented, including that observed at the Cocos-Pacific plate boundary. Renewed but slow spreading during the Brunhes chron (after 0.78 Ma), coupled with huge magmatic inflation, gave rise to the Marsili volcano. Our new data and interpretation show that backarc spreading of the Tyrrhenian Sea was episodic, with sudden rapid pulses punctuating relatively long periods of tectonic quiescence. | en |
| dc.format.extent | 648726 bytes | en |
| dc.format.mimetype | application/pdf | en |
| dc.language.iso | English | en |
| dc.relation.ispartof | Geology | en |
| dc.relation.ispartofseries | /34(2006) | en |
| dc.subject | magnetic anomalies, | en |
| dc.subject | ocean spreading, | en |
| dc.title | Ultrafast oceanic spreading of the Marsili Basin, southern Tyrrhenian Sea: Evidence from magnetic anomaly analysis | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | 717-720 | en |
| dc.subject.INGV | 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism | en |
| dc.identifier.doi | 10.1130/G22555.1 | en |
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Faggioni, O., Pinna, E., Savelli, C., and Schreider, A.A., 1995, Geomagnetism and age study of Tyrrhenian seamounts: Geophysical Journal International, v. 123, p. 915–930. Gee, J., and Kent, D.V., 1994, Variations in layer 2A thickness and the origin of the central anomaly magnetic high: Geophysical Research Letters, v. 21, p. 297–300, doi: 10.1029/93GL03422. Hall, J.M., and Muzzati, A., 1999, Delayed magnetization of the deeper kilometre of oceanic crust at Deep Sea Drilling Project Site 504: Journal of Geophysical Research, v. 104, p. 12,843–12,851, doi: 10.1029/ 1999JB900105. Kastens, K.A., and 21 others, 1988, ODP Leg 107 in the Tyrrhenian Sea: Insights into passive margin and back arc basin evolution: Geological Society of America Bulletin, v. 100, p. 1140–1156. Kastens, K.A., and 20 others, 1990, Proceedings of the Ocean Drilling Program, Scientific results, Volume 107: College Station, Texas, Ocean Drilling Program, 722 p. 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Taylor, B., 1995, Backarc basins: Tectonics and magmatism: New York, Plenum, 524 p. Tivey, M., 1996, The vertical magnetic structure of ocean crust determined from near bottom magnetic field measurements: Journal of Geophysical Research, v. 101, p. 20,275–20,296. Wilson, D.S., 1996, Fastest known spreading on the Miocene Cocos-Pacific plate boundary: Geophysical Research Letters, v. 23, p. 3003–3006, doi: 10.1029/96GL02893. | en |
| dc.description.fulltext | reserved | en |
| dc.contributor.author | Nicolosi, I. | en |
| dc.contributor.author | Speranza, F. | en |
| dc.contributor.author | Chiappini, M. | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy | en |
| item.openairetype | article | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.grantfulltext | restricted | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | With Fulltext | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
| crisitem.author.orcid | 0000-0002-0711-9923 | - |
| crisitem.author.orcid | 0000-0001-5492-8670 | - |
| crisitem.author.orcid | 0000-0001-7433-9435 | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| Appears in Collections: | Article published / in press | |
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