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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-25 21:50:14 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -13.435 Longitude: 159.1066 Position from underway logging |
| Sample number: | in2019_v04_D41-010 |
| Dredge: | D41 |
| 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 | white | brown |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | feldspar |
| Phenocryst abundance (%): | 60 |
| Groundmass: | crystalline |
| Features: | other |
| Vesicle abundance: | >50% |
| Vesicle Filling (%): | 100 |
| Vesicle fill: | calcite, clay |
| Sample bagged: | yes |
| Bucket number: | 75 |
| Rock name: | Massive, altered, vesicular basalt |
| Comments: | - Some small white plag laths (0.5 - 2mm) - Rest of groundmass quite altered to orange mineral - small black mineral (0.5 - 2 mm) presumed pyroxene but looks similar to vesicle infill - just clay? - Lots of vesicles - mostly filled by soft black material, maybe clay? Also partially filled by calcite |
| Comments: | - Some small white plag laths (0.5 - 2mm) - Rest of groundmass quite altered to orange mineral - small black mineral (0.5 - 2 mm) presumed pyroxene but looks similar to vesicle infill - just clay? - Lots of vesicles - mostly filled by soft black material, maybe clay? Also partially filled by calcite |