Sediment echo types and acoustic characteristics of gas-related acoustic anomalies in Jinhae Bay, southern Korea

Kim, Dae C.; Lee, Gwang S.; Lee, Gwang H.; Park, Soo C.

doi:10.1007/s12303-008-0007-8

Cited by 19 publications

(11 citation statements)

References 29 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…He also revealed that the majority of the gas was methane of biogenic origin. Lee (2006) and Kim et al (2008) classified and mapped the echo types of gassy sediment in Jinhae Bay.…”

Section: Introductionmentioning

confidence: 99%

Physical and Acoustic Properties of Gas-bearing Sediments in Jinhae Bay, the South Sea of Korea

Lee

Kim

Lee

et al. 2009

Marine Georesources & Geotechnology

View full text Add to dashboard Cite

High-resolution seismic survey and sediment core sampling were conducted to investigate acoustic characteristics of gas-bearing sediments in Jinhae Bay, the southeast of Korea. The sediment in Jinhae Bay is mostly homogenous mud deposited after the Holocene transgression. Along with the 410 km of chirp seismic profiling, five piston core samples were collected on the track lines.Gassy sediments are common and occur widely in the bay. Core samples were analyzed for sediment texture, physical properties (porosity, water content, bulk density, and grain density), acoustic properties (compressional wave velocity and attenuation), and electrical resistivity. X-radiograph image analysis was also performed to observe the shape of degassing cracks. There is no significant downcore variation on physical and sediment textures regardless of existence of gas bubbles. However, compressional wave velocity dramatically decreases from average 1480 to 1380$739 m=s for the cores that penetrate the gas-bearing zones. This is probably due to degassying cracks that developed by escaping gases and free gas bubbles that are still trapped in the cores. Electrical resistivity is the only geotechnical property that increases in the gas-bearing zone where compressional wave velocity abruptly decreases. This indicates the possibility of using both electrical resistivity as an index variable as well as to compressional wave velocity to identify gassy sediment microstructure because there are little changes in texture and composition of sediment.

show abstract

“…He also revealed that the majority of the gas was methane of biogenic origin. Lee (2006) and Kim et al (2008) classified and mapped the echo types of gassy sediment in Jinhae Bay.…”

Section: Introductionmentioning

confidence: 99%

Physical and Acoustic Properties of Gas-bearing Sediments in Jinhae Bay, the South Sea of Korea

Lee

Kim

Lee

et al. 2009

Marine Georesources & Geotechnology

View full text Add to dashboard Cite

show abstract

“…In addition, the TOC/TN ratio ranged from 3 to 4.8, indicating that the organic matter consisted only of marine phytoplankton (Park et al, 1999;García-García et al, 2007;Kim et al, 2008). Even the relatively high TOC/TN ratio (9.158) seen in core PC-11 indicated mixed marine and terrestrial sources (Kim et al, 2008). A previous study reported that only a few sites in the proximal part of the KSSM deposits had a TOC/TN ratio >20, indicating a terrestrial plant origin (Park et al, 1999).…”

Section: Factors Controlling the Regional Spatial Distribution Of Acomentioning

confidence: 92%

“…The TOC content and mean grain size did not vary significantly with the distance from the Nakdong River. In addition, the TOC/TN ratio ranged from 3 to 4.8, indicating that the organic matter consisted only of marine phytoplankton (Park et al, 1999;García-García et al, 2007;Kim et al, 2008). Even the relatively high TOC/TN ratio (9.158) seen in core PC-11 indicated mixed marine and terrestrial sources (Kim et al, 2008).…”

Section: Factors Controlling the Regional Spatial Distribution Of Acomentioning

confidence: 99%

“…The TOC/TN ratio ranged from 2.886 to 4.852, with the exception of a relatively high value (9.158) at the 560 cmbsf interval in core PC-11. The low TOC/TN ratio indicates that organic matter originated from marine phytoplankton , whereas the relatively high TOC/TN ratio indicates a mixed marine and terrestrial sources (Kim et al, 2008). Core PC-11 was obtained from the southern part of the study area near the Nakdong River (Fig.…”

Section: Sedimentological and Geochemical Characteristics Of Piston Cmentioning

confidence: 99%

See 1 more Smart Citation

Factors determining the spatial distribution of gas-charged sediments in the continental shelf off southeastern Korea

Chun

Ryu

Lee³

et al. 2012

Marine Geology

View full text Add to dashboard Cite

“…The top surface is relatively regular and round, but in some places, a partially uneven and erosional surface occurs. Within unit SY4, acoustic turbidities that are interpreted to be due to the entrapped gas bubbles (Kim et al, 2008;Lee et al, 2009) present a few meters below the seafloor (Figs. 3e5).…”

Section: Seismic Sedimentary Sequencementioning

confidence: 99%

Stratigraphy of late Quaternary deposits using high resolution seismic profile in the southeastern Yellow Sea

Lee

Kim

Yoo

et al. 2014

Quaternary International

View full text Add to dashboard Cite

Sediment echo types and acoustic characteristics of gas-related acoustic anomalies in Jinhae Bay, southern Korea

Cited by 19 publications

References 29 publications

Physical and Acoustic Properties of Gas-bearing Sediments in Jinhae Bay, the South Sea of Korea

Physical and Acoustic Properties of Gas-bearing Sediments in Jinhae Bay, the South Sea of Korea

Factors determining the spatial distribution of gas-charged sediments in the continental shelf off southeastern Korea

Stratigraphy of late Quaternary deposits using high resolution seismic profile in the southeastern Yellow Sea

Contact Info

Product

Resources

About