| Abstract: | Phyllosilicate alteration minerals are commonly found in low petrologic types of carbonaceous chondrites. Previous spectral studies have examined Mg-bearing phyllosilicates with limited success in matching the spectral properties of CM and CI chondrites. Transmission electron microscope and other analytical techniques suggest that Fe-bearing clays are more abundant in CI and CM chondrites than magnesian varieties. Here, we present the results of an examination of the reflectance spectra of Fe-phyllosilicates, including serpentines and berthierines, of which the latter were formerly known as septechlorites. We have measured the diffuse reflectance spectra of powdered samples from 0.3 to 25 ??m. We find that these minerals provide a better spectral match to many of the features seen in CI and CM chondrites, and simple linear combinations of the spectra of both Fe- and Mg-phyllosilicates closely approximate the spectra of CM and CI chondrites. |
| Genre: | Article |
| ProdID: | 70019596 |
| Citation Author: | Calvin, W. M.; King, T. V. V. |
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| Citation End Page: | 701 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Meteoritics and Planetary Science |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Spectral characteristics of iron-bearing phyllosilicates: Comparison to Orgueil (CI1), Murchison and Murray (CM2); 1997; Article; Journal; Meteoritics and Planetary Science; Calvin, W. M.; King, T. V. V. |
| Citation Start Page: | 693 |
| Citation Volume: | 32 |
| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Spectral characteristics of iron-bearing phyllosilicates: Comparison to Orgueil (CI1), Murchison and Murray (CM2); 1997; Article; Journal; Meteoritics and Planetary Science; Calvin, W. M.; King, T. V. V. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1997 00:00 -0600 |
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