A New Method for Quality Control of Geological Cores by X-Ray Computed Tomography: Application in IODP Expedition 370 SCIE SCOPUS

Cited 3 time in WEB OF SCIENCE Cited 4 time in Scopus
Title
A New Method for Quality Control of Geological Cores by X-Ray Computed Tomography: Application in IODP Expedition 370
Author(s)
Tonai, Satoshi; Kubo, Yusuke; Tsang, Man-Yin; Bowden, Stephen; Ide, Kotaro; Hirose, Takehiro; Kamiya, Nana; Yamamoto, Yuzuru; Yang, Kiho; Yamada, Yasuhiro; Morono, Yuki; Heuer, Verena B.; Inagaki, Fumio; Maeda, Lena; Cramm, Margaret; Henkel, Susann; Homola, Kira; Hoshino, Tatsuhiko; Ijiri, Akira; Imachi, Hiroyuki; Kaneko, Masanori; Lagostina, Lorenzo; Manners, Hayley; McClelland, Ilarry-Luke; Metcalfe, Kyle; Okutsu, Natsumi; Pan, Donald; Raudsepp, Maija Jocelyn; Sauvage, Justine; Schubotz, Florence; Spivack, Arthur; Treude, Tina; Viehweger, Bernhard; Wang, David T.; Whitaker, Emily; Kinoshita, Masataka
Publication Year
2019-05-31
Abstract
X-ray computed tomography (XCT) can be used to identify lithologies and deformation structures within geological core, with the potential for the identification processes to be applied automatically. However, because of drilling disturbance and other artifacts, the use of large XCT-datasets in automated processes requires methods of quality control that can be applied systematically. We propose a new systematic method for quality control of XCT data that applies numerical measures to CT slices, and from this obtains data reflective of core quality. Because the measures are numerical they can be applied quickly and consistently between different sections and cores. This quality control processing protocol produces downhole radiodensity profiles from mean CT-values that can be used for geological interpretation. The application of this quality control protocols was applied to XCT data from International Ocean Discovery Program (IODP) Expedition 370 Site C0023 located at the toe of the Nankai accretionary complex. The evaluation of core quality based on this protocol was found to be a good fit to standard-evaluations based on the visual description of core, and could be used to select samples free from drilling disturbance or contamination. The quality-controlled downhole mean CT-value profile has features that can be used to identify lithologies within a formation, the presence and type of deformation structures and to distinguish formations.
ISSN
2296-6463
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/38856
DOI
10.3389/feart.2019.00117
Bibliographic Citation
FRONTIERS IN EARTH SCIENCE, v.7, 2019
Publisher
FRONTIERS MEDIA SA
Subject
QUANTITATIVE-ANALYSIS; ACCRETIONARY PRISM; NANKAI TROUGH; SEDIMENT; DEFORMATION; IMAGE; ROCKS; FLOW
Keywords
X-ray computed tomography; scientific drilling; International Ocean Discovery Program; Nankai Trough; accretionary complex
Type
Article
Language
English
Document Type
Article
Publisher
FRONTIERS MEDIA SA
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