World Data Service for Geophysics

Index to Marine and Lacustrine Geological Samples (IMLGS)
an international partnership

doi:10.7289/V5H41PB8


Repository: SOEST [Contact the Curator]
Ship: Kana Keoki
Cruise: KK820316
Sample: KK820316 STA54 RD32
Device: dredge, rock
Latitude: -8.78467
Longitude: 156.72133
Water Depth(m): 3630
Date: 19820601
IGSN: UHMHAP1QK
Storage: room temperature, dry

Woodlark Basin near new Georgia. Nine buckets of samples available- each individually labeled 1,1,2,3,3,4,4,5, and 9.
1 :   
Comments: ~ 200 kg. Cobble to boulder size fragments of submarine flows and pillows. Most (80%) are slightly phyric basalts containing plagioclase (2-10%) and olivine (1-3%) in fine grained to glassy ground masses. A majority have 2 mm - 5 mm glass rims with some phenocrysts and those grade inward into more crystalline matrix. Phenocryst proportions do not change inward. Nearly all are vesicular with the degree of vesicularity variable within each sample - average vesiclarity ~30%; pipe vesicles (cm-size) are common near surface of flows. Range of vesicularity from 5 - 60%. Sedimentary samples include a siltstone with fragments of glass, plag and ol; siltstone enclosing a large glassy basalt fragment; and bioturbated sandy siltstone with plag and ol fragments. A few % forams are present in these. HIG - 1 bag with described samples, 1 with 3 large samples, 2 others of undescribed rocks. SolIs - 1 bag with described samples, 1 (or 2) bags with undescribed rocks.
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