NDLI: Chirp (2–7 kHz) echo characters and geotechnical properties of surface sediments in the Ulleung Basin, the East Sea

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The concentrations and distributions of U and Th in Paleozoic aquifers surrounding the Llano Uplift area, central Texas, U.S.A.: application to the sources of Ra and Rn in groundwater

Chirp (2–7 kHz) echo characters and geotechnical properties of surface sediments in the Ulleung Basin, the East Sea

Ontogeny of the Late Cambrian trilobiteOlenus asiaticus Kobayashi, 1944 from the Machari Formation of Korea

Geosciences Journal : Volume 3, Issue 3, September 1999

Geosciences Journal : Volume 3, Issue 2, June 1999

Geosciences Journal : Volume 3, Issue 1, March 1999

Geosciences Journal : Volume 2

Geosciences Journal : Volume 1

Chirp (2–7 kHz) echo characters and geotechnical properties of surface sediments in the Ulleung Basin, the East Sea

Content Provider	Springer Nature Link
Author	Kim, Gil Young Kim, Dae Choul Park, Soo Chul Lee, Gwang Hoon
Copyright Year	1999
Abstract	High-resolution (chirp, 2–7 kHz) reflection profiles from the southern continental slope and basin plain of the Ulleung Basin reveal three echo types. Sediment texture and geotechnical properties were analyzed using 22 piston cores. Echo type 1 shows a sharp bottom echo with discrete, continuous subbottom reflectors with a flat or undulatory upper surface interpreted as turbidite/hemipelagic sediment. It is dominant in the basin plain. Echo type 2 is characterized by laterally wedged, an acoustically transparent masses (debrites). This type occurs in the southern lower slope and base-of-slope area. Echo type 3 shows irregular blocky/lumpy or hyperbolic masses with various amount of internal deformation, (interpreted as slide/slump deposits). It occurs in the middle to upper slope area. These echo types show a zonal distribution.Sediment texture in the basin plain, especially mean grain size appears to be the most important parameter for the variations in geotechnical properties (wet bulk density, porosity, velocity, and shear strength). The variations in geotechnical properties with burial depth in the southern slope are dependent strongly on sediment compaction and/or consolidation. Overall, geotechnical properties and sediment texture change significantly from the southern slope area to the basin floor, suggesting that sediments were probably originated from the southern margin. The slope sediments especially are relatively compacted due to the mass flow processes. Therefore, the geotechnical properties of the plain and slope sediments show significantly different values.
Starting Page	213
Ending Page	224
Page Count	12
File Format	PDF
ISSN	12264806
Journal	Geosciences Journal
Volume Number	3
Issue Number	4
e-ISSN	15987477
Language	English
Publisher	Springer-Verlag
Publisher Date	1999-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	high-resolution (2–7 kHz) echo characters geotechnical properties compressional wave velocity Ulleung Basin Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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