2D gravity inversion technique in the study of Cheshire basin

Nadiah Hanim Shafie, Umar Hamzah, Abdul Rahim Samsudin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The gravity method involves measuring the Earth's gravitational field at specific locations influenced by differences in density of sub-surface rocks. It has found numerous applications in engineering, environmental and geothermal studies especially in locating voids, faults, buried stream valleys, water tables and geothermal heat sources. A total of 753 gravity data acquired from the northwestern part of the United Kingdom by the British Geological Society were used in this study with the aims of studying the major structural patterns within the Cheshire basin. The data were processed and analysed with the aid of Oasis Montaj software to determine the fault trends within the entire sedimentary basin. The Bouguer gravity map shows positive anomaly in the northwestern part of the study area indicating the presence of high density sedimentary rocks while negative anomaly observed in the southern part corresponds to low density sediments. The regional and residual isostatic maps derived from different cut-off wavelengths reflect changes in anomalies corresponding to different types of sedimentary rocks such as mudstone, sandstone and limestone. The major faults patterns in Cheshire basin were clearly observed from the Bouguer gravity total horizontal derivative map. Most of the major faults observed in the south of study area are trending in NW-SE and NE-SW directions. The N-S trend minor faults are found in the west and east, while the E-W trends were dominant in the north and south of the study area. The limestone basement depth of about 3736m was estimated from the 2D-modeled cross section developed along the E-W border.

Original languageEnglish
Pages (from-to)4381-4394
Number of pages14
JournalElectronic Journal of Geotechnical Engineering
Volume19 S
Publication statusPublished - 2014

Fingerprint

Gravitation
gravity
Sedimentary rocks
Limestone
basin
anomaly
sedimentary rock
Environmental engineering
limestone
Sandstone
oasis
heat source
Sediments
Earth (planet)
sedimentary basin
void
Rocks
mudstone
water table
Derivatives

Keywords

  • 2D modeling
  • Cheshire basin
  • Gravity anomaly
  • Oasis Montaj software

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

2D gravity inversion technique in the study of Cheshire basin. / Shafie, Nadiah Hanim; Hamzah, Umar; Samsudin, Abdul Rahim.

In: Electronic Journal of Geotechnical Engineering, Vol. 19 S, 2014, p. 4381-4394.

Research output: Contribution to journalArticle

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