Data Trawler - Deployment Details

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Deployment Details

Survey: - SS200302 [details]

Deployment Type: - Sediment Sampling

Station: TD-14

When: 2003-03-21 14:49 UTC

Where: 23° 34.5' S    176° 41.9' E

Maximum Depth (m): unknown

Sediment Sampling details

Device used: Dredge - unspecified

ContentsTop (m)Base (m)
Black olivine-plagioclase basalt, 5% euhedral olivine and 10% plagioclase phenocrysts. Pull-aparts to 2 cm long. Surface weakly weathered black.
Bulk bucket of altered grey lavas.
Dark grey plagioclase andesite. ~10% plagioclase phenocrysts and trace olivine and pyroxene. Some plagioclase-clinopyroxene-olivine crystal clots. Non-vesicular. Surface totally weathered to Fe clays <1 mm thick.
As for 14-03, but more weathered with a surface layer up to 3 mm thick and minor discoloration along fractures.
Black plagioclase basalt. 30% plagioclase phenocrysts up to 5 mm across, and trace pyroxene. Highly vesicular. Surface weakly weathered black.
Plagioclase-rich gabbro, with 60% plagioclase. Grain size ~3 mm. Fe-stained fractures and bands concentric to the boulder surface.
As for 14-01, but plagioclase is slightly finer grained and better sorted. Boulder surface is Fe-stained in fractures.
Blue-grey dacite, moderately vesicular, with trace plagioclase phenocrysts. Ranges from fresh to chloritised equivalents.
As for 14-01, but possibly more olivine and with vesicles being more planar.
White pumice, aphyric with pyroxene microphenocrysts. Locally Fe-stained surface.
Chlorite altered plagioclase-pyroxene andesite. Altered 0.5-1.0 cm rim, with fresh 2 x 2 x 2 cm kernel.
Medium grey to white pyritic breccia. Bleached volcanic fragments in a quartz-pyrite-sulfate(?)-magnetite matrix.
Grey sericite-chlorite altered volcanic (dacite).
Grey chlorite-sericite altered volcanic, less sericitic than 14-13. Weakly plagioclase phyric (originally dacite).
Chlorite altered plagioclase-phyric andesite. 1 cm thick red oxidised chlorite rind, chlorite-altered 1 cm band, ?fresh? kernel.
Dark grey weakly chlorite altered vesicular dacite.
Chlorite-sericite altered dacite.
Chlorite-silica altered aphyric medium grey dacite. ~1% very fine grained disseminated pyrite on outer rim, oxidised at seafloor.
Quartz-pyroxene phyric white pumice, some light Fe-staining.
Bulk bucket of fresh black lavas.
Dark grey plagioclase-rich (~25%) basalt. Plagioclase phenocrysts to 4 mm across. Vesicles in bands. Surface weakly Fe-stained.
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