scholarly journals First results on velocity analyses of multichannel seismic data acquired with the icebreaker RV Araon across the southern Beaufort Sea, offshore Yukon

2016 ◽  
Author(s):  
M Riedel ◽  
J K Hong ◽  
Y K Jin ◽  
K M M Rohr ◽  
M M Côté
Keyword(s):  
Seismic Data ◽  
Beaufort Sea ◽  
First Results ◽  
Multichannel Seismic Data

scholarly journals Multichannel seismic data dissemination from 2017 Beaufort Sea geoscience research expedition, offshore Yukon and Northwest Territories

2021 ◽  
Author(s):  
K M Salmas ◽  
R C Courtney ◽  
M J Duchesne ◽  
S -G Kang ◽  
Y K Jin
Keyword(s):  
Northwest Territories ◽  
Seismic Data ◽  
Data Dissemination ◽  
Beaufort Sea ◽  
Multichannel Seismic Data ◽  
Geoscience Research

A possible new hydrocarbon play, offshore central West Greenland

1998 ◽  
pp. 28-30
Author(s):  
Nina Skaarup ◽  
James A. Chalmers
Keyword(s):  
Seismic Data ◽  
Mineral Resources ◽  
Source Rocks ◽  
Bright Spot ◽  
Offshore Area ◽  
West Greenland ◽  
The Government ◽  
Structural Closure ◽  
Multichannel Seismic Data ◽  
Seismic Lines

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Skaarup, N., & Chalmers, J. A. (1998). A possible new hydrocarbon play, offshore central West Greenland. Geology of Greenland Survey Bulletin, 180, 28-30. https://doi.org/10.34194/ggub.v180.5082 _______________ The discovery of extensive seeps of crude oil onshore central West Greenland (Christiansen et al. 1992, 1994, 1995, 1996, 1997, 1998, this volume; Christiansen 1993) means that the central West Greenland area is now prospective for hydrocarbons in its own right. Analysis of the oils (Bojesen-Koefoed et al. in press) shows that their source rocks are probably nearby and, because the oils are found within the Lower Tertiary basalts, the source rocks must be below the basalts. It is therefore possible that in the offshore area oil could have migrated through the basalts and be trapped in overlying sediments. In the offshore area to the west of Disko and Nuussuaq (Fig. 1), Whittaker (1995, 1996) interpreted a few multichannel seismic lines acquired in 1990, together with some seismic data acquired by industry in the 1970s. He described a number of large rotated fault-blocks containing structural closures at top basalt level that could indicate leads capable of trapping hydrocarbons. In order to investigate Whittaker’s (1995, 1996) interpretation, in 1995 the Geological Survey of Greenland acquired 1960 km new multichannel seismic data (Fig. 1) using funds provided by the Government of Greenland, Minerals Office (now Bureau of Minerals and Petroleum) and the Danish State through the Mineral Resources Administration for Greenland. The data were acquired using the Danish Naval vessel Thetis which had been adapted to accommodate seismic equipment. The data acquired in 1995 have been integrated with the older data and an interpretation has been carried out of the structure of the top basalt reflection. This work shows a fault pattern in general agreement with that of Whittaker (1995, 1996), although there are differences in detail. In particular the largest structural closure reported by Whittaker (1995) has not been confirmed. Furthermore, one of Whittaker’s (1995) smaller leads seems to be larger than he had interpreted and may be associated with a DHI (direct hydrocarbon indicator) in the form of a ‘bright spot’.

scholarly journals Masses and ages for metal-poor stars

2019 ◽  
Vol 627 ◽  
pp. A173 ◽  
Author(s):  
M. Valentini ◽  
C. Chiappini ◽  
D. Bossini ◽  
A. Miglio ◽  
G. R. Davies ◽  
...  
Keyword(s):  
High Resolution ◽  
Seismic Data ◽  
Age Determination ◽  
High Resolution Spectroscopy ◽  
Chemical Abundances ◽  
Abundance Pattern ◽  
Halo Stars ◽  
Stellar Ages ◽  
First Results ◽  
Detailed Chemical

Context. Very metal-poor halo stars are the best candidates for being among the oldest objects in our Galaxy. Samples of halo stars with age determination and detailed chemical composition measurements provide key information for constraining the nature of the first stellar generations and the nucleosynthesis in the metal-poor regime. Aims. Age estimates are very uncertain and are available for only a small number of metal-poor stars. We present the first results of a pilot programme aimed at deriving precise masses, ages, and chemical abundances for metal-poor halo giants using asteroseismology and high-resolution spectroscopy. Methods. We obtained high-resolution UVES spectra for four metal-poor RAVE stars observed by the K2 satellite. Seismic data obtained from K2 light curves helped improve spectroscopic temperatures, metallicities, and individual chemical abundances. Mass and ages were derived using the code PARAM, investigating the effects of different assumptions (e.g. mass loss and [α/Fe]-enhancement). Orbits were computed using Gaia DR2 data. Results. The stars are found to be normal metal-poor halo stars (i.e. non C-enhanced), and an abundance pattern typical of old stars (i.e. α and Eu-enhanced), and have masses in the 0.80−1.0 M⊙ range. The inferred model-dependent stellar ages are found to range from 7.4 Gyr to 13.0 Gyr with uncertainties of ∼30%−35%. We also provide revised masses and ages for metal-poor stars with Kepler seismic data from the APOGEE survey and a set of M4 stars. Conclusions. The present work shows that the combination of asteroseismology and high-resolution spectroscopy provides precise ages in the metal-poor regime. Most of the stars analysed in the present work (covering the metallicity range of [Fe/H] ∼ −0.8 to −2 dex) are very old >9 Gyr (14 out of 19 stars), and all of the stars are older than >5 Gyr (within the 68 percentile confidence level).

SeismicWaveTool: Continuous and discrete wavelet analysis and filtering for multichannel seismic data

2013 ◽  
Vol 184 (1) ◽  
pp. 162-171 ◽  
Author(s):  
J.J. Galiana-Merino ◽  
J.L. Rosa-Herranz ◽  
S. Rosa-Cintas ◽  
J.J. Martinez-Espla
Keyword(s):  
Wavelet Analysis ◽  
Seismic Data ◽  
Discrete Wavelet ◽  
Discrete Wavelet Analysis ◽  
Multichannel Seismic Data

scholarly journals Frontier Geoscience Project (FGP) multichannel seismic data interface

1999 ◽  
Author(s):  
P Potter
Keyword(s):  
Seismic Data ◽  
Multichannel Seismic Data

scholarly journals Middle to Late Pleistocene Architecture and Stratigraphy of the Lower Bengal Fan—Integrating Multichannel Seismic Data and IODP Expedition 354 Results

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Fenna Bergmann ◽  
Tilmann Schwenk ◽  
Volkhard Spiess ◽  
Christian France‐Lanord
Keyword(s):  
Late Pleistocene ◽  
Seismic Data ◽  
Bengal Fan ◽  
Multichannel Seismic Data

Shallow anatomy of a continent–ocean transition zone in the northern South China Sea from multichannel seismic data

2012 ◽  
Vol 554-557 ◽  
pp. 18-29 ◽  
Author(s):  
Junjiang Zhu ◽  
Xuelin Qiu ◽  
Heidrun Kopp ◽  
Huilong Xu ◽  
Zongxun Sun ◽  
...  
Keyword(s):  
South China Sea ◽  
Transition Zone ◽  
South China ◽  
Seismic Data ◽  
Northern South China Sea ◽  
China Sea ◽  
Multichannel Seismic Data

A blind nonstationary deconvolution method for multichannel seismic data

2020 ◽  
pp. 1-13
Author(s):  
Yumeng Jiang ◽  
Siyuan Cao ◽  
Siyuan Chen ◽  
Duo Zheng
Keyword(s):  
Seismic Data ◽  
Deconvolution Method ◽  
Multichannel Seismic Data ◽  
Nonstationary Deconvolution

Analysis of structural trends of sub-sea-floor strata in the Isfjorden area of the West Spitsbergen Fold-and-Thrust Belt based on multichannel seismic data

2013 ◽  
Vol 170 (4) ◽  
pp. 657-668 ◽  
Author(s):  
Maria Blinova ◽  
Jan Inge Faleide ◽  
Roy H. Gabrielsen ◽  
Rolf Mjelde
Keyword(s):  
Seismic Data ◽  
Thrust Belt ◽  
The West ◽  
Sea Floor ◽  
Fold And Thrust Belt ◽  
West Spitsbergen ◽  
Multichannel Seismic Data
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