Knowledge Resource Center for Ecological Environment in Arid Area
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
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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. |
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