Analysis of gravity, magnetic and surface geologic data, northern Chihuahua, Mexico

[摘要] The basic effort of this work is to apply the results of the interpretation of the gravity and magnetic surveys to the previous geologic studies of the area. The gravity map showsa series of highs that correlate with the ridges formed by outcrops of igneous and/or pre-Cenozoic sedimentary rocks, and gravity lows which correlate with valleys filled by rocks of Cenozoic or Quaternary age. A series of profiles, chosen perpendicular to the strike of the anomalies, include the following information: surface topography, surface geology, magnetic basement which would indicate the thickness of the sedimentary section, and the corresponding gravity profile.Gravity differences between the regional curve and the observed gravity profile are used to compute depths to the density discontinuities with the formula to calculate the gravity effect of a horizontal slab of infinite dimensions. The resultsof this analysis are illustrated along four geologic cross sections running approximately NW-SE across the area.

[发布机构] Rice University