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Event details
Voyage: | IN2020_V01 [details] |
When: | 2020-02-26 02:56:04 UTC |
Log: | Geology_Rocks_in2020_v01 |
Equipment: | Not specified |
Position: | Latitude: -32.8059 Longitude: 97.6637 Position from underway logging |
Sample number: | IN2020_V01_D17_011 |
Dredge: | D17 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | yes, in IN2020_V01_D17_011 |
Number of photos: | 9 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | grey-light | white | green |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst abundance (%): | 0 |
Groundmass: | altered |
Mn crust thickness (mm): | 0-3 |
Vesicle abundance: | <10% |
Vesicle Filling (%): | 100 |
Vesicle fill: | Black and white minerals |
Sample bagged: | yes |
Bucket number: | 2 of 2 |
Rock name: | Strongly hydrothermally altered vesicular basalt |
Original Sample Dimensions: | 10x19x11 cm |
Comments: | Strong hydrothermal alteration, pervasive feldspar(?)/quartz alteration concentrated along fractures. Some areas are more intesely altered to a pseuclastic texture. Vesicles (~5%) mostly concentrated in a single layer. |