||Number of Pages
|GEOLOGY AND EARTH SCIENCE
||K. Mallick, A. Vasanthi and K.K. Sharma
||Capital Publishing Company
||BOUGUER GRAVITY REGIONALAND RESIDUAL SEPARATION : Application to Geology and Environment
Author: K. Mallick, A. Vasanthi and K.K. Sharma
Description: The resolution of regional and residual components arising out of the deeper and shallower sources from the observed Bouguer gravity anomalies is an ageold problem. Several analytical techniques have been developed to compute the regional or residual. The common shortcoming of these methods is that the total data set is considered to evaluate the regional. As a result of this, a small portion of residual is left out in the regional. In our new technique, the entire data set is no more required for regional computation. Instead, a square or a rectangle region is chosen and the gravity values at its corner and mid-side nodes represent the regional. The weighted sum of these discrete gravity values yields the regional field. This technique has been tested for gravity data sets in several fields and the performance in each case has been better than that obtained by the existing techniques.
Table of Content: Introduction - Regional and Residual Gravity Anomalies: The Existing Issues - New Computational Schemes * Finite Element Approach * Theory * Accuracy * Computational Procedure * Comparision with other Existing Techniques - Applications to Geological and Environmental Problems: Hydrocarbon * Bounger Gravity Anomalies of Paradox Basin, Utah, USA* Inner Moray Firth Basin, North Sea * Mahanadi Basin, Orissa, India * Kaladgi-Badami Basin, Karnataka-Maharastra, India - Applications to Geological and Environmental Problems: Minerals * Kimberlite Pipes * Gravity and Magnetic Studies over Wajrakarur Kimberlite Field * Gravity Studies over Narayanapet Kimberlite Field (NKF) * Gravity Studies over Cuddapah Diamond Field * Chromite * Chromite Deposits in Orissa, India * Gold Deposits in Chocolate Mountains, California and Arizona * Sulphur Deposits in West Texas, USA - Gravity Method in Structural Studies * The Gangetic Plains * Cauvery Basin * Offshore Magnetic Anomalies * Liquefaction Zone in Bihar-Nepal Region - Isostatic Studies and Vertical Crustal Movements * Isostasy * Gravity Anomalies of California, US * Vertical Crustal Movements - Earthquake Studies and Engineering Applications * Gravity Field of NWHimalayas * Gravity Anomalies in Nepal Himalayas * Gravity Field of Nevada Test Site of US - Gravity Studies on Impact Structures * Gravity Field of Manicougan Crater * Gravity Field of Sudbury Crater - Appendix I * Appendix II * References * Index