کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5781261 | 1635748 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evidence for serpentinization of the Ionian upper mantle from simultaneous inversion of P- and S-wave arrival times
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
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چکیده انگلیسی
Simultaneous inversion of P- and S-wave arrival times, collected during a 3-years Ocean Bottom Seismometer with Hydrophone (OBS/H) monitoring campaign, yields 1D P- and S-wave velocity models for the Ionian lithosphere (Central Mediterranean). The 1D model highlights the presence, in the Ionian upper mantle, of two layers characterized by high seismic P-wave velocity (S1 and S2, 6.3-6.7 and 7.5Â km/s, respectively). These two layers, with thicknesses of about 3.3Â km and 5Â km, respectively, and ranging from â¼8 to â¼16Â km in depth, are characterized by low S-wave velocity (S1Â =Â 3.05-3.2Â km/s, S2Â =Â 3.85Â km/s) and high values of VP/VS (S1Â =Â 2.06-2.09, S2Â =Â 1.95). This is a characteristic feature, often encountered in passive margins and is generally interpreted as partly serpentinized peridotite. The VP, VS and VP/VS values of S1 are consistent with 55-65% of serpentinization of the upper mantle, while the S2 ones are consistent with 15-25% of serpentinization. This research provides a crucial hint about the debated nature of the Ionian crust, suggesting its oceanic structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Geodynamics - Volume 102, December 2016, Pages 115-120
Journal: Journal of Geodynamics - Volume 102, December 2016, Pages 115-120
نویسندگان
Antonino D'Alessandro, Giorgio Mangano, Giuseppe D'Anna, Salvatore Scudero,