DOI: 10.1016/j.quascirev.2012.08.024
Scopus记录号: 2-s2.0-84878920976
论文题名: Destructive and non-destructive density determination: Method comparison and evaluation from the Laguna Potrok Aike sedimentary record
作者: Fortin D. ; Francus P. ; Gebhardt A.C. ; Hahn A. ; Kliem P. ; Lisé-Pronovost A. ; Roychowdhury R. ; Labrie J. ; St-Onge G.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 71 起始页码: 147
结束页码: 153
语种: 英语
英文关键词: CT-Scan
; ICDP-project PASADO
; MSCL Grape density
; Sediment density
; XRF
Scopus关键词: Bulk density measurement
; Continental scientific drillings
; CT-scan
; Density variabilities
; High signal-to-noise ratio
; ICDP-project PASADO
; Sediment densities
; XRF
; Density measurement (specific gravity)
; Fruits
; Gamma rays
; Scanning
; Sedimentology
; Sediments
; Computerized tomography
; bulk density
; cost-benefit analysis
; measurement method
; resolution
; sampling
; sediment core
; signal-to-noise ratio
; X-ray fluorescence
; Argentina
; Laguna Potrok Aike
; Santa Cruz [Argentina]
; Vitaceae
英文摘要: Density measurements play a central role in the characterization of sediment profiles. When working with long records (>100m), such as those routinely obtained within the frame of the International Continental Scientific Drilling Program, several methods can be used, all of them varying in resolution, time-cost efficiency and source of errors within the measurements. This paper compares two relatively new non-destructive densitometric methods, CT-Scanning and the coherent/incoherent ratio from an Itrax XRF core Scanner, to data acquired from a Multi-sensor core logger Gamma Ray Attenuation Porosity Evaluator (MSCL Grape) and discrete measurements of dry bulk density, wet bulk density and water content. Quality assessment of density measurements is performed at low and high resolution along the Laguna Potrok Aike (LPA) composite sequence. Giving its resolution (0.4mm in our study), its high signal to noise ratio, we conclude that CT-Scan provides a precise, fast and cost-efficient way to determine density variation of long sedimentary record. Although more noisy that the CT-Scan measurements, coherent/incoherent ratio from the XRF core scanner also provides a high-resolution, reliable continuous measure of density variability of the sediment profile. The MSCL Grape density measurements provide actual density data and have the significant advantage to be completely non-destructive since the acquisition is performed on full cores prior to opening. However, the quality MSCL Grape density measurements can potentially be reduced by the presence of voids within the sediment core tubes and the dry and bulk density measurements suffers from sampling challenges and are time-consuming. © 2012 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60612
Appears in Collections: 过去全球变化的重建
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作者单位: Centre Eau, Terre et Environnement, Institut National de la Recherche Scientifique, Québec, QC G1K 9A9, Canada; GEOTOP Research Center, H3C 3P8, Canada; Alfred Wegener Institute for Polar and Marine Research, Am Alten Hafen 26, 27576 Bremerhaven, Germany; Geomorphology and Polar Research (GEOPOLAR), Institute of Geography, University of Bremen, Celsiusstr. FVG-M, D-28359 Bremen, Germany; Canada Research Chair in Marine Geology, Institut des sciences de la mer de Rimouski (ISMER), UQAR, Rimouski, Canada; Indian Institute of Science Education and Research, Kolkata, Mohanpur 741252, Nadia, West Bengal, India; ISMER (Institut des sciences de la mer de Rimouski), Canada
Recommended Citation:
Fortin D.,Francus P.,Gebhardt A.C.,et al. Destructive and non-destructive density determination: Method comparison and evaluation from the Laguna Potrok Aike sedimentary record[J]. Quaternary Science Reviews,2013-01-01,71