Information: - Our applications will be disrupted from 2024-05-03 16:30 AEST to 2024-05-03 18:00 AEST Friday due to infrastructure upgrades. We apologize for any inconvenience and appreciate your patience during this maintenance window.
Please login if you have access to particular applications.
Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-21 09:23:53 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -13.4347 Longitude: 153.796 Position from underway logging |
| Sample number: | in2019_v04_D33-002 |
| Dredge: | D33 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 2 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark |
| Composition: | mafic |
| Alteration: | Fresh | Mn crust |
| Phenocryst abundance (%): | 0 |
| Groundmass: | microcrystaline |
| Vesicle abundance: | absent |
| Sample bagged: | yes |
| Bucket number: | 48 |
| Rock name: | Fine-grained, dense, grey rock. May be mafic igneous, but may be something else. |
| Comments: | Mn crust 5mm thickness. Sample is a rounded cobble likely transported downslope. The rock is very dense (maybe mafic igneous). Sample is crosscut by think (<<0.5mm) white veins (not calcite) which occasionally also contain pyrite. Around the edge of the rock and along some fractures is ~1cm wide brown staining (likely Fe, Mn). |