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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-19 20:25:42 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -14.028 Longitude: 155.5201 Position from underway logging |
Sample number: | in2019_v04_D30_012 |
Dredge: | D30 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 3 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | red | brown |
Composition: | mafic |
Phenocryst mineralogy: | feldspar | altered |
Phenocryst abundance (%): | 30 |
Phenocryst size range (mm): | 1-4 |
Groundmass: | altered |
Vesicle abundance: | 10-30% |
Vesicle Filling (%): | 60 |
Vesicle fill: | calcite, white mica, manganese |
Alteration: | Mn crust | altered |
Sample bagged: | yes |
Bucket number: | 41 |
Rock name: | Altered porphyric basalt |
Comments: | Mn-crust 1 mm, large phenocrysts (~2mm) altered to white mica and iron oxide, some feldspar, others unidentified, Mn filling fractures. |