Table T11. Summary of sediment mineralogy from X-ray diffraction, Hole M0028A. (See table notes.)
| Intensity ratios | Mean | Max |
|---|---|---|
| Clay minerals | 15.0 | 64.1 |
| Kaolinite | 8.9 | 53.9 |
| Micas and Illite | 2.0 | 4.2 |
| Mixed layered clays | 3.0 | 4.4 |
| Smectite | 1.1 | 1.5 |
| Carbonates | 4.7 | 18.1 |
| Mg-rich calcite | 0.7 | 4.4 |
| Calcite | 1.2 | 4.4 |
| Siderite | 0.6 | 1.7 |
| Rhodochrosite | 0.9 | 4.9 |
| Dolomite and ankerite | 0.2 | 0.4 |
| Aragonite | 1.1 | 2.3 |
| Detrital minerals | 72.8 | 116.2 |
| Quartz | 63.8 | 81.0 |
| Plagioclase | 1.5 | 2.7 |
| Chlorite | 3.1 | 19.4 |
| K-feldspar | 1.2 | 2.4 |
| Pyroxene | 1.4 | 4.2 |
| Zeolites | 0.7 | 2.2 |
| Gibbsite | 0.5 | 2.6 |
| Epidote | 0.5 | 1.3 |
| Amphibole | 0.2 | 0.4 |
| Authigenic minerals | 7.5 | 24.0 |
| Pyrite | 2.1 | 4.4 |
| Glauconite | 1.4 | 3.8 |
| Goethite | 1.9 | 8.4 |
| Apatite | 0.8 | 2.7 |
| Magnetite | 0.9 | 4.0 |
| Barite | 0.4 | 0.7 |
| Total: | 100.0 | 222.3 |
Notes: The original sum for the mean of all measured peak intensity ratios was 92.3%. After elimination of all clay minerals (4.55–4.4 Å, 3.6%), gypsum (0.8%), and halite (0.9%), this sum became 86.9%, which was then renormalized to 100% above.
Previous | Close | Next | Top of page