Self Potential Method PDF

Method arization method is based on the surface measurement of natural potentials ochemical reactions in the subsurface. ctric currents to be injected into the ground as in the RESISTIVITY & IP sed in base metal exploration, to detect the presence of massive st to the IP method which is used to...

Method arization method is based on the surface measurement of natural potentials ochemical reactions in the subsurface. ctric currents to be injected into the ground as in the RESISTIVITY & IP sed in base metal exploration, to detect the presence of massive st to the IP method which is used to predominantly to investigate dissemin ly used in groundwater & geothermal investigations, ngineering applications‐‐‐> mapping seepage flow ms, geological mapping, delineate shear zones and dams, geological mapping, delineate shear zones and near implest to operate in the field. ‫تعتمد طريقة الجهد الذاتي أو االستقطاب التلقائي على القياس السطحي للجهود الطبيعية‬ ‫ ال يتطلب حقن تيارات كهربائية في األرض كما هو الح‬.‫الكهروكيميائية في باطن األرض‬ ‫ للكشف عن وجود كميا‬، ‫ تم استخدامه في التنقيب عن المعادن األساسية‬.‫واالستقطاب المستحث‬ ‫ تم استخدامه بشكل م‬. ‫ التي تستخدم في الغالب لالكتشاف الخام المبعثرة‬IP ‫عكس طريقة‬ ‫التطبيقات البيئية والهندسية ‐‐‐> رسم خرائط تدفق التس‬، ‫الجوفية والطاقة الحرارية األرضية‬ ‫وهىا االبسط ل‬، ‫ ومناطق القص المحددة والقريبة المرتبطة بالسدود‬، ‫ورسم الخرائط الجيولوجية‬ Spontaneous potentials can be produced by Geothermal Gradient mineralization differences, electro-chemical action, SP Profle geothermal activity, and bioelectric generation of vegetation. Oxidation Zone Water Table Reduction Zone mechanism of self-potential (Sato & Mooney 1960; Kilty 1984) (1) Nonpolarizing electrodes. (2) Survey wire The wire used in SP surveys must be strong, hardy, and of low resistance (3) Millivolt meter. The resolution of the meter should be 0.1 or 1.0 mV The temperature of the two pots should be maintained similar to avoid creating an One electrode is kept the second electrode unwanted potential; fixed at a base station on is moved along the 0.5 mV/oC for Cu/ unmineralised ground. survey profile Cu SO4. Care must be taken to keep track of the Two electrodes at a fixed potential polarity, separation are leap-frogged, and errors can one over the other, along a accumulate. survey profile. Most interpretation is qualitative. The anomaly minimum over the anomalous body or displaced downhill Depth =The width of the half-amplitude. The symmetry or asymmetry of the anomaly provides information on the attitude of the body, The steep slope and positive tail of the anomaly lying on the down-dip side. Self Potential anomaly over water flowing out of a fracture zone.