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 STA59 RD34
Device: dredge, rock
Latitude: -9.0015
Longitude: 157.9925
Water Depth(m): 925 to 870
Date: 19820603
IGSN: UHMHAP1QO
Storage: room temperature, dry

S.E. of Kavachi Volcano. Ten buckets of samples available- Two buckets labeled "A" one bucket labeled "B" Two buckets labeled 1, two buckets labeled 2, and three buckets individually labeled 5-7.
1 :   
Comments: ~ 600 kg of cobble to boulder size ingneous rocks; > 90% are fresh with angular surfaces. The majority of samples (> 90%) are mafic basalts that vary from Cpx-rich porphytic varieties to Cpx-ol phyric and plag-phyric types. There appears to be a complete continuum between the various types but Cps-rich varieties are dominant. Picritic and plag-phyric types comprise < 20% of the total. A few volcaniclastic breccias are present; one is coated by sulfur and alters ~ 30% of the rock.One unusual sample is an amphibole xenocryst andesite with 10-15% euhedral amphibole phenocryst (xenocrysts?). None of the samples have significant amounts of glass or glassy margins, many are vesicular but this varies from 1% to 50% in more pumacous types. 3 Bags of undescribed rocks for Solomon Is. 4 Bags of undescribed rocks for HIG. 1 Bag each of described samples for HIG and SI.
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