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MASA VALVERDE AMT SURVEY GEOGNOSIA S.L.L. GEOGNOSIA has run an AMT (Audio Mageneto-Telluric) survey over a well-known massive sulphide deposit to test.

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Presentación del tema: "MASA VALVERDE AMT SURVEY GEOGNOSIA S.L.L. GEOGNOSIA has run an AMT (Audio Mageneto-Telluric) survey over a well-known massive sulphide deposit to test."— Transcripción de la presentación:

1 MASA VALVERDE AMT SURVEY GEOGNOSIA S.L.L. GEOGNOSIA has run an AMT (Audio Mageneto-Telluric) survey over a well-known massive sulphide deposit to test how the AMT method works in this kind of envioroments. The MasaValverde deposit was discovered in July 1986. It was discovered by the consortium Peñarroya-ADARO, after drilling a gravity anomaly. A total of 19 drillholes were completed between 1986 and 1993 over de anomaly. 13 of the 19 holes intersected massive sulphide and well developed semi-massive/stockwork mineralization. 6 drill-holes more were done to test smaller gravity anomalies around. The average thickness of the massive sulphide intersections is about 70m and the average for stockwork mineralization is 90m. A lot of geophysical surveys has been done over this target, but not all of them has worked sucessfully. TEM surveys had a lot of noyse and had problems with the graphitic shales close to the surface. Servicios de Geofísica, Geología y Topografía

2 AMT MASA VALVERDE. LOCATION SURVEYED MAP Servicios de Geofísica, Geología y Topografía Red contour, inside the drill- holes has cut mineralization. Blue lines, AMT profiles Red points, drill- holes

3 Servicios de Geofísica, Geología y Topografía AMT MASA VALVERDE. PROFILE 1

4 Servicios de Geofísica, Geología y Topografía AMT MASA VALVERDE. PROFILE 2

5 Servicios de Geofísica, Geología y Topografía AMT MASA VALVERDE. PROFILE 3

6 Servicios de Geofísica, Geología y Topografía AMT MASA VALVERDE. PROFILE 4

7 Servicios de Geofísica, Geología y Topografía AMT MASA VALVERDE. PROFILE 5

8 OTHER EXAMPLES Servicios de Geofísica, Geología y Topografía

9 9 Tule Springs Hills East Mormon Mts. Mormon Mts. Toquop Gap Line 4 Line 3 Line 1 Line 2 Toquop Wash Garden Wash CSAMT Toquop Gap Line Hung from USGS DEM File Toquop Gap Quadrangle Vertical Exaggeration- 3:1 Perspective View, Looking North along the East Mormon Mts. Servicios de Geofísica, Geología y Topografía

10 CSAMT Cross Sections (vertical exaggeration- 3:1) Garden Wash West East NW SE North Basin Cross Line Segment of Line 4 Garden Wash Servicios de Geofísica, Geología y Topografía

11 CONDUCTIVITY FROM DRILLING TESTING VERSUS AMT SOUNDING Servicios de Geofísica, Geología y Topografía

12 COMPARATION BETWEEN SEISMIC AND AMT PROFILES Servicios de Geofísica, Geología y Topografía


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