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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-26 11:43:55 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -14.1911 Longitude: 159.6826 Position from underway logging |
| Sample number: | in2019_v04_D43-005 |
| Dredge: | D43 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 3 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-light | brown |
| Composition: | mafic |
| Alteration: | Mn crust |
| Phenocryst mineralogy: | feldspar |
| Phenocryst abundance (%): | 20% |
| Phenocryst size range (mm): | 0.5-3mm |
| Groundmass: | microcrystaline |
| Vesicle abundance: | 10-30% |
| Vesicle Filling (%): | 30% |
| Vesicle fill: | calcite |
| Sample bagged: | yes |
| Bucket number: | 80 |
| Rock name: | Altered feldspar-phyric basalt |
| Comments: | Mn crust thickness 25mm. Veins and calcite patches. Potential fresh feldspar. Bornw alteration at the rim of the rock near MnOx crust. Maybe px present? |