Published November 1979
| public
Journal Article
A magnesium analogue of chalcophanite in manganese-rich concretions from Baja California
- Creators
- Potter, Russell M.
-
Rossman, George R.
Abstract
Concretions which carry chemical remanent magnetization in sediments in Baja California, Mexico, previously called "hydropsilomelane," were found to consist of siltstone matrix minerals cemented by a manganese oxide. The X-ray powder pattern, infrared spectra, and chemical analyses indicate that the manganese oxide has the chalcophanite structure. The high concentration of magnesium, presumed to occur in the interlayer position of this mineral, suggests that it is the magnesium analogue of chalcophanite and extends the known range of substitution in chalcophanite-structure minerals.
Additional Information
© 1979 Mineralogical Society of America. Manuscript received, December 14, 1978; accepted for publication, March 27, 1979. We thank E. E. Larson (University of Colorado) for the samples of concretions used in this study.Additional details
- Eprint ID
- 38478
- Resolver ID
- CaltechAUTHORS:20130514-081805265
- Created
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2013-05-14Created from EPrint's datestamp field
- Updated
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2019-11-26Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences
- Other Numbering System Name
- Caltech Division of Geological and Planetary Sciences
- Other Numbering System Identifier
- 3147