Leg : 22 Top/Bottom Interval(mm): 900/ 930 Describer: Hekinian, R.
Hole: 211 Top of Core Depth(m) : 409.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 409.92 Sect/Pc #: 1/
ROCK = PLAG MICROPHYRIC DIABASE
SOURCE IS IR*
Phenocrysts- PLAGIOCLASE (41.12%)
MICROPHENOS*
Groundmass - CLINOPYROXENE (22.12%)
PERCENTAGES OBTAINED BY MODAL ANALYSES*
Alteration - FERROUS OXIDE ( 6.21%)
MICA ( 8.72%)
HORNBLENDE ( TR%)
CLAY MINERALS (21.81%)
INCLUDES CHLORITE+SERPENTINE+SMECTITE AND
VERMICULITE-CHLORITE*
Leg : 22 Top/Bottom Interval(mm): 1430/ 0 Describer: Hekinian, R.
Hole: 211 Top of Core Depth(m) : 409.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 410.43 Sect/Pc #: 1/
ROCK = ANDESITIC DIABASE
THIS ROCK APPEARS TO BE TECTONICALLY ALTERED;
Texture: HOLOCRYSTALLINE,PHANERITIC,SUBOPHITIC*
Groundmass - PLAGIOCLASE ( 54%)
SODIC PLAG APPROX COMP<AN30,CALCIC ANDESINE(AN48-
AN50),LENGTH OF PLAG AND PYX REACHES UP TO 2-3MM,
THE GENERAL TEXTURE IS SUBOPHITIC WITH LARGE
PLATES OF CPX,LATHS OF PLAG AND INTERSTITIAL
CHLORITE,FE-ORE,BIOTITE AND ZEOLITE,MOST ABUNDANT
PLAG IS THE SODIC VARIETY;
OPAQUE MINERALS ( 6%)
CLINOPYROXENE ( 20%)
PURPLISH*
Alteration - QUARTZ ( 1%)
CHLORITE ( 8%)
ZEOLITE ( 2%)
AMPHIBOLE ( 1%)
EPIDOTE ( <1%)
SERICITE ( 3%)
MICA ( 4%)
BROWN BIOTITE,USUALLY SHOWS REACTION RIM AROUND
MAGN*
Leg : 22 Top/Bottom Interval(mm): 1140/ 0 Describer: Hekinian, R.
Hole: 211 Top of Core Depth(m) : 409.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 411.64 Sect/Pc #: 2/
ROCK = ANDESITIC BASALT;
Texture: HYPOCRYSTALLINE,APHANITIC,INTERSERTAL*
Groundmass - PLAGIOCLASE ( 39%)
INTERSTICES OF PLAG LATHS ARE FILLED WITH PALAG,
CALCITE,FE-OXIDE MINERALS AND GRANULES OF CPX, FEW
PLAG AND CPX LATHS SHOW A SUBOPHITIC GROWTH,SODIC
PLAG APPROX COMP <AN30,ANDESINE-LABRADORITE(AN46-
AN53);
OPAQUE MINERALS ( 10%)
INCLUDES HEMATITE AND MAGN;
PALAGONITE ( 8%)
CLINOPYROXENE ( 25%)
PURPLISH*
Alteration - QUARTZ ( 7%)
CHLORITE ( 5%)
CALCITE ( 10%)
MICA ( 2%)
Leg : 22 Top/Bottom Interval(mm): 1200/1340 Describer: Hekinian, R.
Hole: 211 Top of Core Depth(m) : 437.50 Rock Type: METAMORPHIC
Core: 15 Sample Midpoint(m) : 438.77 Sect/Pc #: 1/
ROCK = AMPHIBOLITE
SOURCE IS IR*
Groundmass - OLIVINE ( 5.63%)
GROUNDMASS ( 8.45%)
INCLUDES GLASS+DARK MESOSTASIS AND
CRYPTOXTLLINE UNIDENTIFIED AGGREGATES,PERCENTAGES
OBTAINED BY MODAL ANALYSES*
Alteration - FERROUS OXIDE ( 0.28%)
MICA ( 3.09%)
HORNBLENDE (36.62%)
OXYHORNBLENDE (43.09%)
CALCITE ( 3.81%)
Leg : 22 Top/Bottom Interval(mm): 670/ 700 Describer: Hekinian, R.
Hole: 211 Top of Core Depth(m) : 437.50 Rock Type: METAMORPHIC
Core: 15 Sample Midpoint(m) : 441.19 Sect/Pc #: 3/
ROCK = PLAG MICROPHYRIC AMPHIBOLITE BASALT
SOURCE IS IR*
Phenocrysts- PLAGIOCLASE (50.50%)
MICROPHENOS*
Groundmass - CLINOPYROXENE ( TR%)
GROUNDMASS (15.58%)
INCLUDES GLASS+DARK MESOSTASIS+CRYPTOXTLLINE
UNIDENTIFIED AGGREGATES,MODAL ANALYSIS*
Alteration - FERROUS OXIDE ( 5.28%)
CALCITE ( 8.04%)
MICA ( 0.22%)
HORNBLENDE ( 9.05%)
OXYHORNBLENDE ( 9.30%)
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