期刊名称：International Research Journal of Earth Sciences
电子版ISSN：2321-2527
出版年度：2018
卷号：6
期号：11
页码：10-16
语种：English
出版社：International Science Community Association
摘要：In 2007, there was gushing of methane gas from a few existing irrigational borewells located in Tadipatri region, Southwestern part of Cuddapah Basin, India. To procure the causes for gas leakage magnetic measurements were carried out along four Traverses (T1, T2, T3 and T4) in the study area covered about 16 sq.km. These traverses are about 4 km long with station interval of 25m and are oriented in NNE-SSW direction. All these borewells are located in and around the prominent villages Vengannapalle, Goparajupalle and Komatikuntla of the Tadipatri region. Coefficient of Variation is an important parameter to identify tectonically disturbed zones (faults/fractures), applied to the magnetic data (T1-T4). Using these computed values the contour map is prepared which inferred few anomalous zones marked as "A,B,C,D,E and F" and all the borewells emanating gas fall on these disturbed zones. Magnetic anomalies (profiles) are compared with computed coefficient of variation along four Traverses T1-T4 to delineate tectonically disturbed zones. These zones are the faults and fractures associated with gas occurrences. In general, the magnetic anomaly and its coefficient of variation is well corroborated. It may be noted that the traverses T1 and T4 are highly disturbed zones and maximum bore wells over or near these traverses emanated gas.
关键词：Tadipatri shales;coefficient of variation;disturbed zones;Faults;Fractures;irrigational borewells
