Electrical properties of basalts from Sites 768 and 770

Update item information
Publication Type Journal Article
School or College College of Mines & Earth Sciences
Department Geology & Geophysics
Creator Jarrard, Richard D.
Other Author Schaar, R.
Title Electrical properties of basalts from Sites 768 and 770
Date 1991
Description Conductivity of 54 basalt samples from ODP Sites 768 and 770 was measured as a function of temperature and fluid salinity. Porosity was also measured for all samples, and cation exchange capacity was measured for 46 of the samples. Porosity measurements indicated that porosity is underestimated for basalts like these, unless one uses extensive drying at high vacuum. At salinities greater than 29 ppt, and throughout the range of salinity and temperatures likely in situ, sample conductivity (Co) is controlled by porosity (<f>) according to the Archie relation Co = 0.22-C^?13 (orFF = 4.5//1.3), where Cw is conductivity of the pore fluids and FF = CJCO is the formation factor. At lower salinity, clay-surface conduction or microcrack conduction may dominate. We are unable to distinguish reliably between the two mechanisms, but we do detect their effects subtly at high salinity and strongly at low salinity.
Type Text
Publisher Ocean Drilling Program
First Page 91
Last Page 104
Language eng
Bibliographic Citation Jarrard, R. D., & Schaar, R. (1991). Electrical properties of basalts from Sites 768 and 770. Proc., scientific results, ODP, Leg 124, Celebes and Sulu Seas, 91-104.
Rights Management ©Ocean Drilling Program, Reprinted from Jarrard, R. D., & Schaar, R. (1991). Electrical properties of basalts from Sites 768 and 770. Proc., scientific results, ODP, Leg 124, Celebes and Sulu Seas, 91-104.
Format Medium application/pdf
Format Extent 3,165,439 bytes
Identifier ir-main,11228
ARK ark:/87278/s6tm7vdj
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2012-06-13
ID 704114
Reference URL https://collections.lib.utah.edu/ark:/87278/s6tm7vdj
Back to Search Results