High-resolution detection of geologic boundaries from potential-field anomalies: An enhanced analytic signal technique

Shu Kun Hsu, Jean Claude Sibuet, Chuen Tien Shyu

研究成果: 雜誌貢獻期刊論文同行評審

264 引文 斯高帕斯(Scopus)

摘要

A high-resolution technique is developed to image geologic boundaries such as contacts and faults. The outlines of the geologic boundaries can be determined by tracing the maximum amplitudes of an enhanced analytic signal composed of the nth-order vertical derivative values of two horizontal gradients and one vertical gradient. The locations of the maximum amplitudes are independent of the ambient potential field. This technique is particularly suitable when interference effects are considerable and/or when both induced and remanent magnetizations are not negligible. The corresponding depth to each geologic boundary can be estimated from the amplitude ratio of the enhanced and the simple analytic signals, which provides a simple estimation technique. Such a method has been applied to magnetic data acquired in the Ilan Plain of Taiwan located at the southwestern end of the Okinawa Trough. The quantitative analysis shows that the underlying geologic boundaries deepen southward and slightly eastward. The enlargement of the Ilan Plain in the direction of the Okinawa Trough and the existence of north-northwest and west-northwest trending faults near the city of Ilan reveal a discontinuity between the Okinawa Trough backarc extension and the compressional process in Taiwan.

原文???core.languages.en_GB???
頁(從 - 到)373-386
頁數14
期刊Geophysics
61
發行號2
DOIs
出版狀態已出版 - 1996

指紋

深入研究「High-resolution detection of geologic boundaries from potential-field anomalies: An enhanced analytic signal technique」主題。共同形成了獨特的指紋。

引用此