FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1886739100> ?p ?o ?g. }

• W1886739100 endingPage "n/a" @default.
• W1886739100 startingPage "n/a" @default.
• W1886739100 abstract "This paper presents an interdisciplinary study of the northern Chile double seismic zone. First, a high-resolution velocity structure of the subducting Nazca plate has been obtained by the tomoDD double-difference tomography method. The double seismic zone (DSZ) is observed between 80 and 140 km depth, and the two seismic planes is 20 km apart. Then, the chemical and petrologic characteristics of the oceanic lithosphere associated with this DSZ are deduced by using current thermal-petrological-seismological models and are compared to pressure-temperature conditions provided by a numerical thermomechanical model. Our results agree with the common hypothesis that seismicity in both upper and lower planes is related to fluid releases associated with metamorphic dehydration reactions. In the seismic upper plane located within the upper crust, these reactions would affect material of basaltic (MORB) composition and document different metamorphic reactions occurring within high-P (>2.4 GPa) and low-T (<570°C) jadeite-lawsonite blueschists and, at greater depth (>130 km), lawsonite-amphibole eclogite conditions. The lower plane lying in the oceanic mantle can be associated with serpentinite dehydration reactions. The Vp and Vs characteristics of the region in between both planes are consistent with a partially (∼25–30 vol % antigorite, ∼0–10% vol % brucite, and ∼4–10 vol % chlorite) hydrated harzburgitic material. Discrepancies persist that we attribute to complexities inherent to heterogeneous structural compositions. While various geophysical indicators evidence particularly cold conditions in both the descending Nazca plate and the continental fore arc, thermomechanical models indicate that both seismic planes delimit the inner slab compressional zone around the 400°C (±50°C) isotherm. Lower plane earthquakes are predicted to occur in the slab's flexural neutral plane, where fluids released from surrounding metamorphic reactions could accumulate and trigger seismicity. Fluids migrating upward from the tensile zone below could be blocked in their ascension by the compressive zone above this plane, thus producing a sheeted layer of free fluids, or a serpentinized layer. Therefore earthquakes may present either downdip compression and downdip tensile characteristics. Numerical tests indicate that the slab's thermal structure is not the only factor that controls the occurrence of inner slab compression. (1) A weak ductile subduction channel and (2) a cold mantle fore arc both favor inner slab compression by facilitating transmission of compressional stresses from the continental lithosphere into the slab. (3) Decreasing the radius of curvature of the slab broadens the depth of inner slab compression, whereas (4) decreasing upper plate convergence diminishes its intensity. All these factors indicate that if DSZs indeed contour inner slab compression, they cannot be linked only to slab unbending, but also to the transmission of high compressional stresses from the upper plate into the slab." @default.
• W1886739100 created "2016-06-24" @default.
• W1886739100 creator A5022561232 @default.
• W1886739100 creator A5026136311 @default.
• W1886739100 creator A5036113979 @default.
• W1886739100 creator A5059915241 @default.
• W1886739100 date "2008-07-01" @default.
• W1886739100 modified "2023-10-03" @default.
• W1886739100 title "Double seismic zone of the Nazca plate in northern Chile: High-resolution velocity structure, petrological implications, and thermomechanical modeling" @default.
• W1886739100 cites W1493314112 @default.
• W1886739100 cites W1493472940 @default.
• W1886739100 cites W1495060942 @default.
• W1886739100 cites W1510228678 @default.
• W1886739100 cites W1553799086 @default.
• W1886739100 cites W1636995053 @default.
• W1886739100 cites W1645329350 @default.
• W1886739100 cites W1650778316 @default.
• W1886739100 cites W1813052076 @default.
• W1886739100 cites W1921763430 @default.
• W1886739100 cites W1947415605 @default.
• W1886739100 cites W1967015183 @default.
• W1886739100 cites W1970180342 @default.
• W1886739100 cites W1970816196 @default.
• W1886739100 cites W1973257264 @default.
• W1886739100 cites W1975633233 @default.
• W1886739100 cites W1976433819 @default.
• W1886739100 cites W1978534444 @default.
• W1886739100 cites W1983227787 @default.
• W1886739100 cites W1984633020 @default.
• W1886739100 cites W1986128094 @default.
• W1886739100 cites W1989655601 @default.
• W1886739100 cites W1991061836 @default.
• W1886739100 cites W1993006701 @default.
• W1886739100 cites W1998601546 @default.
• W1886739100 cites W2000312383 @default.
• W1886739100 cites W2001820253 @default.
• W1886739100 cites W2002191842 @default.
• W1886739100 cites W2003214593 @default.
• W1886739100 cites W2004690797 @default.
• W1886739100 cites W2006737888 @default.
• W1886739100 cites W2010668132 @default.
• W1886739100 cites W2010985259 @default.
• W1886739100 cites W2011520418 @default.
• W1886739100 cites W2013060894 @default.
• W1886739100 cites W2014306702 @default.
• W1886739100 cites W2016929133 @default.
• W1886739100 cites W2017937891 @default.
• W1886739100 cites W2021327980 @default.
• W1886739100 cites W2032932075 @default.
• W1886739100 cites W2035867684 @default.
• W1886739100 cites W2036716531 @default.
• W1886739100 cites W2038900215 @default.
• W1886739100 cites W2043314553 @default.
• W1886739100 cites W2045779386 @default.
• W1886739100 cites W2047325657 @default.
• W1886739100 cites W2049133665 @default.
• W1886739100 cites W2062283819 @default.
• W1886739100 cites W2063503947 @default.
• W1886739100 cites W2064238708 @default.
• W1886739100 cites W206433176 @default.
• W1886739100 cites W2064985255 @default.
• W1886739100 cites W2067858523 @default.
• W1886739100 cites W2071427887 @default.
• W1886739100 cites W2073103878 @default.
• W1886739100 cites W2078144526 @default.
• W1886739100 cites W2081901260 @default.
• W1886739100 cites W2083495012 @default.
• W1886739100 cites W2089011565 @default.
• W1886739100 cites W2093036886 @default.
• W1886739100 cites W2094481996 @default.
• W1886739100 cites W2100107337 @default.
• W1886739100 cites W2101626443 @default.
• W1886739100 cites W2102234201 @default.
• W1886739100 cites W2118448391 @default.
• W1886739100 cites W2122840621 @default.
• W1886739100 cites W2124139363 @default.
• W1886739100 cites W2126500238 @default.
• W1886739100 cites W2129143054 @default.
• W1886739100 cites W2134934643 @default.
• W1886739100 cites W2135494568 @default.
• W1886739100 cites W2138359451 @default.
• W1886739100 cites W2138551531 @default.
• W1886739100 cites W2138880521 @default.
• W1886739100 cites W2146623053 @default.
• W1886739100 cites W2148807365 @default.
• W1886739100 cites W2153132363 @default.
• W1886739100 cites W2160437402 @default.
• W1886739100 cites W2162840034 @default.
• W1886739100 cites W2164612341 @default.
• W1886739100 cites W2168934780 @default.
• W1886739100 cites W2170664103 @default.
• W1886739100 cites W2467885025 @default.
• W1886739100 cites W2912099803 @default.
• W1886739100 doi "https://doi.org/10.1029/2008gc002020" @default.
• W1886739100 hasPublicationYear "2008" @default.
• W1886739100 type Work @default.
• W1886739100 sameAs 1886739100 @default.
• W1886739100 citedByCount "75" @default.

• next