Implications of laboratory electrical measurements on interpretation of EM-surveys and origin of the Sudbury Structure

Details Implications of laboratory electrical measurements on interpretation of EM-surveys and origin of the Sudbury Structure Implications of laboratory electrical measurements on interpretation of EM-surveys and origin of the Sudbury Structure

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..947k&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 10, p. 947-950

Mathematics

Logic

2

Electrical Measurement, Electrical Resistivity, Geological Surveys, Igneous Rocks, Lithology, Magnetic Anomalies, Mineral Deposits, Mineral Exploration, Sedimentary Rocks, Stratigraphy, Structural Basins, Structural Properties (Geology), Carbon, Core Sampling, Earth Crust, Electromagnetic Measurement, Porosity

Scientific paper

Electrical resistivity and effective porosity have been measured for 52 drillcore samples representing major sedimentary and igneous lithologies exposed in the Sudbury Structure (SS). The purpose was to constrain interpretation of high conductivity anomalies observed by surface electromagnetic (EM) surveys conducted across the SS, and to provide information on its origin. While zones of low resistivity are known to exist in the upper sedimentary formations, rocks at depth are generally characterized by high resistivities (10(exp 4) -7x10(exp 4) Ohm-m), leaving the source of the deep EM anomaly unexplained. However, samples with low resistivities (7-20 Ohm-m) have been unexpectedly found in the cores from lower sections of the SS, depths possibly corresponding to that of the EM anomaly. These samples are characterized by low porosities (0.3-0.6%), normal bulk densities (2.78-2.81), and a porphyritic texture with a blackish matrix, suggesting carbon as the likely cause of the low resistivities.

Affiliated with

Also associated with

No associations

Rating

Implications of laboratory electrical measurements on interpretation of EM-surveys and origin of the Sudbury Structure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Implications of laboratory electrical measurements on interpretation of EM-surveys and origin of the Sudbury Structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Implications of laboratory electrical measurements on interpretation of EM-surveys and origin of the Sudbury Structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-886571