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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 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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