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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-14 02:48:18 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -17.4888 Longitude: 155.8815 Position from underway logging |
Sample number: | in2019_v04_D13_009 |
Dredge: | D13 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 2 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | grey-dark | brown | green |
Composition: | mafic |
Phenocryst mineralogy: | feldspar | olivine[iddingsite] |
Phenocryst abundance (%): | 20 |
Phenocryst size range (mm): | 1-2 |
Groundmass: | glassy | microcrystaline | altered |
Vesicle abundance: | <10% |
Vesicle Filling (%): | 30 |
Vesicle fill: | Fe rich clay |
Alteration: | Mn crust | altered |
Sample bagged: | yes |
Bucket number: | 26 |
Rock name: | Altered olivine feldspar phyric basalt |
Requested: | Monash |
Comments: | Mn-crust <1 mm, abandunace altered feldspar and olivine phenocryst identified, black and brown patches present in the matrix, which may be Mn- and Fe-oxide. |