Other
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm...u42a06h&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #U42A-06
Other
0920 Gravity Methods, 1219 Local Gravity Anomalies And Crustal Structure, 1227 Planetary Geodesy And Gravity (5420, 5714, 6019), 1234 Regional And Global Gravity Anomalies And Earth Structure, 8122 Dynamics, Gravity And Tectonics
Scientific paper
Gravity anomalies have long been used by geophysicists to estimate either (i) the density contrast producing the anomaly, or (ii) the depth to the source of the anomaly, but not both parameters simultaneously. For a given gravity anomaly, one of the parameters must be specified a priori in order to solve for the other. Parameter determination requires the use of an isostatic compensation model, e.g., Airy, Pratt, thermal, dynamic, flexural, etc. This paper introduces a new parameter, the gravity/gradient ratio (GGR), or gz/gz,z. The GGR represents a length scale, and provides a first-order estimate of the depth-to-source of the gravity anomaly. This estimate is a completely independent estimate of depth since it is not a function of isostatic model, nor is it a function of the density contrast producing the gravity anomaly. Following the technique of Mickus & Hinojosa [2001], we compute the vertical gravity gradient component (gz,z), and obtain estimates of the GGR for a number of gravity highs and lows in the Wichita Uplift and Anadarko Basin region. The depth-to-source estimates are then compared with results derived from a wide-angle seismic refraction/reflection profile across the same region.
Hinojosa J. H.
Mickus Kevin L.
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