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Titolo:
Mantle transition zone thickness beneath Afar: implications for the originof the Afar hotspot
Autore:
Nyblade, AA; Knox, RP; Gurrola, H;
Indirizzi:
Penn State Univ, Dept Geosci, University Pk, PA 16802 USA Penn State UnivUniversity Pk PA USA 16802 i, University Pk, PA 16802 USA Texas Tech Univ, Dept Geosci, Lubbock, TX 79409 USA Texas Tech Univ Lubbock TX USA 79409 , Dept Geosci, Lubbock, TX 79409 USA
Titolo Testata:
GEOPHYSICAL JOURNAL INTERNATIONAL
fascicolo: 2, volume: 142, anno: 2000,
pagine: 615 - 619
SICI:
0956-540X(200008)142:2<615:MTZTBA>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ISOTOPIC VARIATIONS; RECEIVER FUNCTIONS; VELOCITY SPECTRUM; ETHIOPIA; SURFACE; MODEL;
Keywords:
Afar; discontinuities; hotspot; receiver functions; transition zone; upper mantle;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Nyblade, AA Penn State Univ, Dept Geosci, University Pk, PA 16802 USA PennState Univ University Pk PA USA 16802 y Pk, PA 16802 USA
Citazione:
A.A. Nyblade et al., "Mantle transition zone thickness beneath Afar: implications for the originof the Afar hotspot", GEOPHYS J I, 142(2), 2000, pp. 615-619

Abstract

The velocity spectrum stacking method is applied to receiver functions from stations ATD and AAE to image P-to-S converted phases originating at the 410 and 660 km discontinuities beneath Afar. A transition zone thickness of244 +/- 19 km is obtained, similar to the global average transition zone thickness. This result suggests that any broad thermal anomaly beneath Afar probably does not extend as far down as the transition zone. However, because of the 19 km uncertainty in the thickness estimate, a small thermal anomaly of similar to 100-150 K at mantle transition zone depths cannot be ruled out.

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Documento generato il 07/04/20 alle ore 04:07:12