FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2176217177> ?p ?o ?g. }

• W2176217177 endingPage "8460" @default.
• W2176217177 startingPage "8439" @default.
• W2176217177 abstract "West Antarctica consists of several tectonically diverse terranes, including the West Antarctic Rift System, a topographic low region of extended continental crust. In contrast, the adjacent Marie Byrd Land and Ellsworth-Whitmore mountains crustal blocks are on average over 1 km higher, with the former dominated by polygenetic shield and stratovolcanoes protruding through the West Antarctic ice sheet and the latter having a Precambrian basement. The upper mantle structure of these regions is important for inferring the geologic history and tectonic processes, as well as the influence of the solid earth on ice sheet dynamics. Yet this structure is poorly constrained due to a lack of seismological data. As part of the Polar Earth Observing Network, 13 temporary broadband seismic stations were deployed from January 2010 to January 2012 that extended from the Whitmore Mountains, across the West Antarctic Rift System, and into Marie Byrd Land with a mean station spacing of ~90 km. Relative P and S wave travel time residuals were obtained from these stations as well as five other nearby stations by cross correlation. The relative residuals, corrected for both ice and crustal structure using previously published receiver function models of crustal velocity, were inverted to image the relative P and S wave velocity structure of the West Antarctic upper mantle. Some of the fastest relative P and S wave velocities are observed beneath the Ellsworth-Whitmore mountains crustal block and extend to the southern flank of the Bentley Subglacial Trench. However, the velocities in this region are not fast enough to be compatible with a Precambrian lithospheric root, suggesting some combination of thermal, chemical, and structural modification of the lithosphere. The West Antarctic Rift System consists largely of relative fast uppermost mantle seismic velocities consistent with Late Cretaceous/early Cenozoic extension that at present likely has negligible rift related heat flow. In contrast, the Bentley Subglacial Trench, a narrow deep basin within the West Antarctic Rift System, has relative P and S wave velocities in the uppermost mantle that are ~1% and ~2% slower, respectively, and suggest a thermal anomaly of ~75 K. Models for the thermal evolution of a rift basin suggest that such a thermal anomaly is consistent with Neogene extension within the Bentley Subglacial Trench and may, at least in part, account for elevated heat flow reported at the nearby West Antarctic Ice Sheet Divide Ice Core and at Subglacial Lake Whillans. The slowest relative P and S wave velocity anomaly is observed extending to at least 200 km depth beneath the Executive Committee Range in Marie Byrd Land, which is consistent with warm possibly plume-related, upper mantle. The imaged low-velocity anomaly and inferred thermal perturbation (~150 K) are sufficient to support isostatically the anomalous long-wavelength topography of Marie Byrd Land, relative to the adjacent West Antarctic Rift System." @default.
• W2176217177 created "2016-06-24" @default.
• W2176217177 creator A5003520200 @default.
• W2176217177 creator A5013582768 @default.
• W2176217177 creator A5017957257 @default.
• W2176217177 creator A5035121844 @default.
• W2176217177 creator A5054985518 @default.
• W2176217177 creator A5058686718 @default.
• W2176217177 creator A5063950781 @default.
• W2176217177 creator A5070789854 @default.
• W2176217177 creator A5080033015 @default.
• W2176217177 creator A5082234324 @default.
• W2176217177 date "2015-12-01" @default.
• W2176217177 modified "2023-10-11" @default.
• W2176217177 title "A seismic transect across West Antarctica: Evidence for mantle thermal anomalies beneath the Bentley Subglacial Trench and the Marie Byrd Land Dome" @default.
• W2176217177 cites W1514237529 @default.
• W2176217177 cites W1519554290 @default.
• W2176217177 cites W1587979637 @default.
• W2176217177 cites W1589496917 @default.
• W2176217177 cites W1714661189 @default.
• W2176217177 cites W1725491940 @default.
• W2176217177 cites W1801625845 @default.
• W2176217177 cites W1833615389 @default.
• W2176217177 cites W1844028667 @default.
• W2176217177 cites W1893521577 @default.
• W2176217177 cites W1903390259 @default.
• W2176217177 cites W1955520095 @default.
• W2176217177 cites W1963619828 @default.
• W2176217177 cites W1966754807 @default.
• W2176217177 cites W1973665559 @default.
• W2176217177 cites W1976844056 @default.
• W2176217177 cites W1977385747 @default.
• W2176217177 cites W1980246624 @default.
• W2176217177 cites W1980442642 @default.
• W2176217177 cites W1980491738 @default.
• W2176217177 cites W1983607265 @default.
• W2176217177 cites W1983806650 @default.
• W2176217177 cites W1986738852 @default.
• W2176217177 cites W1988320584 @default.
• W2176217177 cites W1990365623 @default.
• W2176217177 cites W1990908860 @default.
• W2176217177 cites W1992978784 @default.
• W2176217177 cites W1994633101 @default.
• W2176217177 cites W1995072754 @default.
• W2176217177 cites W1998539667 @default.
• W2176217177 cites W1999647445 @default.
• W2176217177 cites W2000186159 @default.
• W2176217177 cites W2011970992 @default.
• W2176217177 cites W2012778404 @default.
• W2176217177 cites W2015355770 @default.
• W2176217177 cites W2016195720 @default.
• W2176217177 cites W2018314772 @default.
• W2176217177 cites W2019483474 @default.
• W2176217177 cites W2019697143 @default.
• W2176217177 cites W2021196398 @default.
• W2176217177 cites W2022712506 @default.
• W2176217177 cites W2023017648 @default.
• W2176217177 cites W2029321466 @default.
• W2176217177 cites W2033244472 @default.
• W2176217177 cites W2034753142 @default.
• W2176217177 cites W2035544268 @default.
• W2176217177 cites W2041068145 @default.
• W2176217177 cites W2042791519 @default.
• W2176217177 cites W2046245905 @default.
• W2176217177 cites W2049071401 @default.
• W2176217177 cites W2050546358 @default.
• W2176217177 cites W2057465591 @default.
• W2176217177 cites W2060373359 @default.
• W2176217177 cites W2063937978 @default.
• W2176217177 cites W2064599357 @default.
• W2176217177 cites W2067368961 @default.
• W2176217177 cites W2071297559 @default.
• W2176217177 cites W2072100957 @default.
• W2176217177 cites W2088528402 @default.
• W2176217177 cites W2091746476 @default.
• W2176217177 cites W2092818562 @default.
• W2176217177 cites W2092852291 @default.
• W2176217177 cites W2093036886 @default.
• W2176217177 cites W2093567690 @default.
• W2176217177 cites W2096831684 @default.
• W2176217177 cites W2097897435 @default.
• W2176217177 cites W2102213705 @default.
• W2176217177 cites W2103113534 @default.
• W2176217177 cites W2103396560 @default.
• W2176217177 cites W2112167095 @default.
• W2176217177 cites W2112344034 @default.
• W2176217177 cites W2113398637 @default.
• W2176217177 cites W2114478952 @default.
• W2176217177 cites W2114619773 @default.
• W2176217177 cites W2115532364 @default.
• W2176217177 cites W2116615769 @default.
• W2176217177 cites W2120353909 @default.
• W2176217177 cites W2120387369 @default.
• W2176217177 cites W2123042467 @default.
• W2176217177 cites W2126500238 @default.
• W2176217177 cites W2127559886 @default.
• W2176217177 cites W2130906129 @default.
• W2176217177 cites W2132239511 @default.

• next