DOI: 10.1007/s00531-014-1110-x
Scopus记录号: 2-s2.0-84940959788
论文题名: Initial seismic observations from a deep borehole drilled into the Canadian Shield in northeast Alberta
作者: Chan J. ; Schmitt D.R.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期: 6 起始页码: 1549
结束页码: 1562
语种: 英语
英文关键词: Canadian Shield
; Craton rocks
; Metamorphic rocks
; Tube waves
; Velocity seismic profiling
; Zero-offset VSP
Scopus关键词: borehole
; craton
; metamorphic rock
; seismic reflection
; seismic velocity
; vertical seismic profile
; Alberta
; Canada
; Canadian Shield
英文摘要: The availability of a deep borehole in northeastern Alberta provides an unprecedented opportunity to study the in situ metamorphic craton rocks. This borehole reaches a depth of 2.4 km, with 1.8 km in the crystalline rocks, and is the only known borehole allowing access into the deeper rocks of the metamorphic Canadian Shield. In 2011, a zero-offset vertical seismic profile (VSP) was acquired to assist in the interpretation of seismic reflection data and geophysical logs. Three sets of upgoing tube waves interpreted from the raw profile correspond to the small-scale fluctuations in the borehole diameters and fracture zone in the crystalline rocks. A comparison between sonic log velocities and VSP velocities reveals a zone with increased velocity that could be due to the change in rock composition and texture in the basement rocks. The final processed profile is used to generate corridor stacks for differentiating between primary reflections and multiples in the seismic reflection profile. Analysis of the zero-offset VSP verifies existing log interpretation on the presence of fractures and the possible lithological changes in the metamorphic rocks of the Canadian Shield. © 2014, The Author(s). URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940959788&doi=10.1007%2fs00531-014-1110-x&partnerID=40&md5=1f312df547f362767159541c1a79e9ec
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70264
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Physics, Institute for Geophysical Research, University of Alberta, 4-181 CCIS, Edmonton, AB, Canada
Recommended Citation:
Chan J.,Schmitt D.R.. Initial seismic observations from a deep borehole drilled into the Canadian Shield in northeast Alberta[J]. International Journal of Earth Sciences,2015-01-01,104(6)