STA55 RD31.JPG (primary image)
  Sample Name: KK820316-4 STA55 RD31
  Other Name(s):
  Sample Type: Dredge
  Parent IGSN: Not Provided
Field Name: KK820316-4 STA55 RD31
Description: 150 kg of pebble to boulder size rock fragments, all fresh and angular surfaces. 1) ~60% is vesicular basalt: of this ~ 40% is ol and/or cpx-rich with large euhedral phenocrysts of cpx and/or ol. A few of the samples are picritic 30% of these also contain plagioclase as a phenocryst together with cpx and olivine; however plagioclase contents are generally <5%. Spinel is a minor constituent in livines ~ 5% of the basalts are plag-pyroxene phyric with ~ 20% plag and 10-15% cpx. these may be transitional to the andesites. 2) ~ 30% andesite to Rhyodacite - one large boulder ~20 kg is holocrystalline Rhyodacite, the andesite contains plag (15%), cpx (10%) and possibly hornblende as phenocrysts in plag-rich groundmass; vesicles < 5%. Rhyodacite are holocrystalline with plag, K-spar, hornblende, qtz and aegirine cpx? less than <10 vesicles, some fragments have a glassy texture. 3) Sedimentary rocks: ~ 10% Epiclastic volcanic sandstones with various igneous clasts visible; pebbly mudstone and gravel; also a silty sand with foram. 1 bag described and 1 undescribed to HIG and Sol Is - also 1 bag with Rhyodacite boulder to HIG.
Age (min): Not Provided
Age (max): Not Provided
Collection Method: Dredge
Collection Method Description: Not Provided
Size: Not Provided
Geological Age: Not Provided
Geological Unit: Not Provided
Comment: Four buckets of samples available each individually labeled 1-3
Purpose: Geological studies
Latitude start (WGS84): -8.2128333
Latitude End: Not Provided
Longitude start (WGS84): 156.46467
Longitude End: Not Provided
Northing (m) (UTM NAD83): Not Provided
Easting (m) (UTM NAD83): Not Provided
Zone: Not Provided
Vertical Datum: Not Provided
Elevation start: Not Provided
Elevation End: Not Provided
Nav Type: Not Provided
Physiographic Feature: Not Provided
Name Of Physiographic Feature: Not Provided
Location Description: Ridge just NW of Simbo. Depth start (m) 2,045. Depth finish (m) 1,635
Locality: Not Provided
Locality Description: Not Provided
Country: Not Provided
State/Province: Not Provided
County: Not Provided
City: Not Provided
Field Program/Cruise: KK820316-4
Platform Type: Not Provided
Platform Name: Not Provided
Platform Description: Not Provided
Launch Type: Not Provided
Launch Platform Name: Not Provided
Launch ID: Not Provided
Collector/Chief Scientist: Not Provided
Collector/Chief Scientist Detail: Not Provided
Collection Start Date: 1982-06-02 00:00:00Z
Collection End Date: Not Provided
Current Archive: Not Provided
Current Archive Contact Details: Not Provided
Original Archive: Not Provided
Original Archive Contact Details: Not Provided
Related Samples
Parents: No Parents
Siblings: No Siblings
Children: No Children
Relevant Documents: