Please login if you have access to particular applications.
Event details
Voyage: | IN2020_V01 [details] |
When: | 2020-02-15 12:54:04 UTC |
Log: | Geology_Rocks_in2020_v01 |
Equipment: | Not specified |
Position: | Latitude: -44.8904 Longitude: 86.5054 Position from underway logging |
Sample number: | IN2020_V01_D13_006 |
Dredge: | D13 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | yes, in IN2020_V01_D13_006 |
Number of photos: | 5 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | black | pink | brown | yellow |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst abundance (%): | 0 |
Groundmass: | microcrystaline |
Mn crust thickness (mm): | 10 |
Vesicle abundance: | 10-30% |
Vesicle Filling (%): | 80 |
Vesicle fill: | Calcite, clay and other minerals |
Grain size: | pebble (2-64 mm) |
Grain shape: | mixture |
Sorting: | good |
Components: | volcanic vesicular |
Cement: | calcite | other |
Sample bagged: | yes |
Bucket number: | 1 of 2 |
Rock name: | Moderately altered basalt breccia with Mn oxide matrix |
Original Sample Dimensions: | 6.5x7.5x8.5 cm |
Comments: | Two clasts of altered basalt held together by black Mn oxide "matrix". Matrix has minor amounts of calcite. Both clasts exhibit plagioclase microphenocrysts, are aphanitic, and vesicular (<10%). Pink and yellow colour of clasts likely due to moderate alteration. |