干旱区生态环境知识资源中心(Arid): Basement Depth Estimation of Cheshire Basin in Northwest England By Power Spectrum Analysis of Gravity Data

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	Basement Depth Estimation of Cheshire Basin in Northwest England By Power Spectrum Analysis of Gravity Data
	Shafie, Nadiah Hanim; Hamzah, Umar; Samsudin, Abdul Rahim; Ibrahim, Azmi
通讯作者	Shafie, NH
来源期刊	ELECTRONIC JOURNAL OF GEOTECHNICAL ENGINEERING
ISSN	1089-3032
出版年	2016
卷号	21 期号:1 页码:395-408
英文摘要	Analysis of gravity data by power spectrum technique has been widely used for automatic estimation of bedrock depth. A total of 3000 gravity data representing an area within 53 degrees 7'-53 degrees 35' N and 1 degrees 51'-3 degrees 3' W in Cheshire Basin NW England were processed and analysed by Oasis Montaj computer software to produce Bouguer anomaly map. The power spectrum technique was then applied to the calculated Bouguer anomalies for depth estimation of the bedrock in the study area. Bouguer anomalies along 5 selected lines in E-W direction were used in the power spectrum analysis. In general Bouguer gravity values measured in the study area are within -8.8 to 17.0 mGal with positive anomalies concentrated in the west and east while gravity lows are dominant in the middle part. An abrupt change in the anomaly observed along a NE SW line from -2.6 to 8 mGal especially in the east and west is associated with major faults. The negative Bouguer anomaly zone in the middle of the study area bordered by positive Bouguer values was interpreted as representing thick sediment deposited in a big graben between 2 major faults. Power spectrum curve slopes of lines A to E show depths ranging from 4.12 to 4.68 km representing deeper Bouguer anomaly sources and values ranging from 0.71 to 0.87 km for the shallower one. Deeper source depth of 4.41 km represent an average of basement rock depth underlying the thickest sediment while the average of shallow source depth of about 0.81 km represents depth of shallow basement rock underlying the thinnest sediment layer mostly in the far east and west of the study area.
英文关键词	Gravity interpretation Bouguer anomaly power spectrum analysis and bedrock depth
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000459416900029
WOS类目	Engineering, Geological
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/332047
作者单位	[Shafie, Nadiah Hanim; Hamzah, Umar; Samsudin, Abdul Rahim; Ibrahim, Azmi] Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Environm & Nat Resources Sci, Bangi 43600, Selangor, Malaysia
推荐引用方式 GB/T 7714	Shafie, Nadiah Hanim,Hamzah, Umar,Samsudin, Abdul Rahim,et al. Basement Depth Estimation of Cheshire Basin in Northwest England By Power Spectrum Analysis of Gravity Data[J],2016,21(1):395-408.
APA	Shafie, Nadiah Hanim,Hamzah, Umar,Samsudin, Abdul Rahim,&Ibrahim, Azmi.(2016).Basement Depth Estimation of Cheshire Basin in Northwest England By Power Spectrum Analysis of Gravity Data.ELECTRONIC JOURNAL OF GEOTECHNICAL ENGINEERING,21(1),395-408.
MLA	Shafie, Nadiah Hanim,et al."Basement Depth Estimation of Cheshire Basin in Northwest England By Power Spectrum Analysis of Gravity Data".ELECTRONIC JOURNAL OF GEOTECHNICAL ENGINEERING 21.1(2016):395-408.