Leg : 60 Top/Bottom Interval(mm): 90/ 100 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: UNIDENTIFIED
Core: 49 Sample Midpoint(m) : 455.60 Sect/Pc #: 1/PCE 1B
ROCK = BRECCIA CEMENT
ROCK FRAGS (15%) ARE BADLY ALTERED DIABASES
(1.5 - 10 MM IN DIAMETER AND SUBANGULAR),MATRIX
(85%) IS COMPOSED OF 70% CARB AND 30% CLAY.MINS
(VERMICULITE) + FE HYDROXIDES + CHLORITE +
PREHNITE + EPIDOTE;
Texture: GRANOBLASTIC*
Alteration - CARBONATE ( 5795%)
Location: MATRIX Replacing: GROUNDMASS,ROCK FRAGS.
CLAY MINERALS
Location: MATRIX Replacing: GROUNDMASS,ROCK FRAGS.
VERMICULITE;
HYDROXIDE
Location: MATRIX Replacing: GROUNDMASS,ROCK FRAGS.
CHLORITE
Location: MATRIX Replacing: GROUNDMASS,ROCK FRAGS.
PREHNITE
Location: MATRIX Replacing: GROUNDMASS,ROCK FRAGS.
EPIDOTE
Location: MATRIX Replacing: GROUNDMASS,ROCK FRAGS.
Leg : 60 Top/Bottom Interval(mm): 110/ 130 Describer:
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: METAMORPHIC
Core: 49 Sample Midpoint(m) : 455.62 Sect/Pc #: 1/PCE 1B
ROCK = PLAGIOCLASE PHYRIC METABASALT
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
SLIDE IS TOO THIN;
Texture: PORPHYRITIC*
Phenocrysts- PLAGIOCLASE ( 30%)
Size(mm): 0.5-2.0 Morphology: EUHEDRAL
PARTIALLY ALTERED TO SERICITE AND CLAYS;
CLINOPYROXENE
IDENTITY UNCERTAIN,SEVERAL GRAINS PRESENT*
Groundmass - COMBINATION ( 70%)
INCLUDES CARBONATE + CHLORITE + CLAYS
REMAINDER GROUNDMASS CEMENTED BY CARBONATE ALONG
FRACTURES*
Alteration - SERICITE
Location: PHENOS Replacing: PLAG
CARBONATE
Location: GROUNDMASS, Replacing: PLAG
Location: PHENOS
CHLORITE
Location: GROUNDMASS
CLAY MINERALS
Location: GROUNDMASS
Leg : 60 Top/Bottom Interval(mm): 330/ 350 Describer:
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 455.84 Sect/Pc #: 1/PCE 6
ROCK = ALTERED GABBRO
ALTERED RECRYSTALLIZED GABBRO,FRAGMENT IN GABBRO-
METABASALT POLYMICT BRECCIA;
Texture: LEPIDOBLASTIC*
Groundmass - PLAGIOCLASE ( 70%)
Size(mm): 2.0-4.0 Morphology: TABULAR
TECTONIZED FABRIC AND PARTLY GRANULATED,PARTIALLY
ALTERED TO SERICITE;
PYROXENE
Size(mm): 2.0-4.0
ALTERED TO HEMATITE + CHLORITE ALONG EXSOLUTION
LAMALLAE,PYX COULD BE OPX;
OPAQUE MINERALS
Size(mm): 0.1-2.0 Morphology: IRREGULAR
FE-TI OXIDES USUALLY ASSOCIATED WITH BIOTITE AND
CHLORITE*
Alteration - SERICITE
Location: PHENOS Replacing: PLAG
INCIPIENT ALTERATION;
HEMATITE
Location: EXSOLUTION Replacing: PYX
Location: LAMALLAE
PYX MAY BE HYPERSTHENE;
CHLORITE
Location: EXSOLUTION Replacing: PYX
Location: LAMALLAE
PYX MAY BE HYPERSTHENE*
Leg : 60 Top/Bottom Interval(mm): 600/ 610 Describer:
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: METAMORPHIC
Core: 49 Sample Midpoint(m) : 456.11 Sect/Pc #: 1/PCE 9
ROCK = LEUCOCRATIC META-GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Groundmass - PLAGIOCLASE
Size(mm): 5-10
MOSTLY LARGE FRACTURED AND VEINED WITH TREMOLITE -
ACTINOLITE + SOME IN 1 CM RADIATING CLUSTERS WITH
CHLORITE,MINOR GRANULATION OF PLAG AT GRAIN
BOUNDARIES*
TREMOLITE
ACTINOLITE
Alteration - CHLORITE
SEVERAL 1 CM-SIZED CLUSTERS OF RADIATING TREMOLITE
- ACTINOLITE SHEAFS + OR - CHLORITE*
Leg : 60 Top/Bottom Interval(mm): 1000/1010 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 456.51 Sect/Pc #: 1/PCE 15
ROCK = MAFIC GABBRO
MODERATELY ALTERED;
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA
ALTERED OLIVINE GABBRO,NORITE;
Texture: HYPIDIOMORPHIC-GRANULAR*
Groundmass - PLAGIOCLASE ( 40%)
APPROX COMP AN60;
CLINOPYROXENE ( 30%)
COMBINATION ( 25%)
INCLUDES OL+OPX,ALTERED;
MAGNETITE ( <1%)
Alteration - CHLORITE
Location: GROUNDMASS Replacing: OL + OPX
SERPENTINITE
Location: GROUNDMASS Replacing: OL + OPX
MAGNETITE
Location: GROUNDMASS Replacing: OL + OPX
FERROUS HYDROX MINS
Location: GROUNDMASS Replacing: OL + OPX
OPX IS THE MOST BADLY ALTERED PHASE,ONLY SINGLE
RELICT PRESERVED IN ENTIRE THIN SECTION;
CHLORITE
Location: GROUNDMASS Replacing: PLAG
PUMPELLYITE
Location: GROUNDMASS Replacing: PLAG
SERICITE
Location: GROUNDMASS Replacing: PLAG
Leg : 60 Top/Bottom Interval(mm): 1040/1070 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 456.56 Sect/Pc #: 1/PCE 17
ROCK = PEGMATITIC GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
ORIGINALLY ANORTHOSITIC GABBRO NOW CONVERTED TO
AGGREGATE OF PREHNITE + PUMPELLYITE + CHLORITE +
EPIDOTE + CLAY.MINS,MINOR RELICT PLAG;
Texture: GRANOBLASTIC*
Alteration - PREHNITE
Location: GROUNDMASS Replacing: PLAG
PUMPELLYITE
Location: GROUNDMASS Replacing: PLAG
CHLORITE
Location: GROUNDMASS Replacing: PLAG
EPIDOTE
Location: GROUNDMASS Replacing: PLAG
CLAY MINERALS
Location: GROUNDMASS Replacing: PLAG
SMALL REMNANTS OF PLAG ARE PRESERVED*
Leg : 60 Top/Bottom Interval(mm): 1200/1230 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: METAMORPHIC
Core: 49 Sample Midpoint(m) : 456.72 Sect/Pc #: 1/PCE 18
ROCK = EPIDOSITE
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
SUBANGULAR ROCK FRAGS CEMENTED BY CHLORITE+CLAY+
HEMATITE+FE-HYDROXIDES(CEMENT IS 30%),ROCK HAS 1%
CHLORITIZED ROCKS AND TOTALLY ALTERED PLAG GRAINS
SAME SIZE AS EPIDOTE GRAINS,ROCK IS ABOUT 70%
EPIDOTE GRAINS;
Texture: GRANULAR*
Alteration - CARBONATE ( 70%)
COMBINATION ( 30%)
Location: CEMENT
INCLUDES CHLOR + CLAY + HEMATITE + FE.HYDRX*
Leg : 60 Top/Bottom Interval(mm): 640/ 660 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: UNIDENTIFIED
Core: 49 Sample Midpoint(m) : 457.65 Sect/Pc #: 2/PCE 9
ROCK = POLYMICT BRECCIA
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
ROCK FRAGMENTS COMPOSED OF ALTERED AMPHIBOLITE-
BIOTITE GABBRO + METABASALTS,PROPORTIONS OF CLASTS
AND MATRIX MINS ARE VARIABLE;
Texture: BLASTOCLASTIC*
Groundmass - PLAGIOCLASE
ALBITE
BIOTITE
MAGNETITE
Alteration - COMBINATION
Location: MATRIX
INCLUDES CARB + CHLOR + PUMPELLYITE + PREHNITE +
VERMICULITE + HEMATITE + HYDROXIDES + EPIDOTE*
Leg : 60 Top/Bottom Interval(mm): 680/ 690 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: METAMORPHIC
Core: 49 Sample Midpoint(m) : 457.69 Sect/Pc #: 2/PCE 9
ROCK = PLAG PHYRIC METABASALT
METABASALT FRAGMENT IN GABBRO-METABASALT POLYMICT
BRECCIA,DESCRIBER CALLS THIS A DIABASE;
Texture: SUBOPHITIC;
Where sampled: FRAGMENT IN BRECCIA*
Groundmass - PLAGIOCLASE ( 58%)
Size(mm): 0.3-2.0
ALTERED;
CLINOPYROXENE ( 38%)
Size(mm): 0.3-1.2
ALTERED,RELICTS;
MAGNETITE ( 2%)
Size(mm): 0.1-0.2
Alteration - ALBITE
Location: GROUNDMASS Replacing: PLAG
CLAY MINERALS
Location: GROUNDMASS Replacing: PLAG
PUMPELLYITE
Location: GROUNDMASS Replacing: PLAG
BIOTITE
Location: GROUNDMASS Replacing: CPX
HORNBLENDE
Location: GROUNDMASS Replacing: CPX
Vesicles -
Size(mm): 0.3-0.8
Percent: 1-2
Filling: CHLORITE,
Shape: ROUND-
Filling: CLAY.MINS,
Shape: IRREGULAR
Filling: PREHNITE
Leg : 60 Top/Bottom Interval(mm): 520/ 580 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 455.50 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 459.05 Sect/Pc #: 3/PCE 8
ROCK = HORNBLENDE GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: OPHITIC;
Groundmass - PLAGIOCLASE ( 70%)
Morphology: EUHEDRAL
APPROX COMP AN50-52,PARTLY ALTERED,NORMAL AND
RHYTHMIC ZONATION;
HORNBLENDE ( 27%)
GREEN;
MAGNETITE ( 3%)
FE-TI OXIDE*
Alteration - COMBINATION (20-25%)
Replacing: PLAG
INCLUDES SERICITE + CLAY.MINS*
Leg : 60 Top/Bottom Interval(mm): 520/ 560 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 465.00 Rock Type: METAMORPHIC
Core: 50 Sample Midpoint(m) : 465.54 Sect/Pc #: 1/PCE 5C
ROCK = METABASALT
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
VERY BADLY ALTERED(PREVIOUSLY VESICULAR WITH
TRACHYTIC TEXTURE) AND COMPOSED OF AMYGDULES AND
GROUNDMASS,AMYGDULES (5%) CONSIST OF CHLORITE +
PREHNITE(?)+ QUARTZ + CARBONATE,GROUNDMASS (95%)
CONSISTS OF PREHNITE + PUMPELLYITE + ZOISITE +
CHLORITE + QUARTZ + CLAY.MINS;
Texture: GRANOBLASTIC,AMYGDALOIDAL*
Groundmass - PREHNITE
ID UNCERTAIN FOR PREHNITE;
PUMPELLYITE
ZOISITE
CHLORITE
QUARTZ
CLAY MINERALS
Alteration - COMBINATION ( 95%)
Location: GROUNDMASS
INCLUDES PREHNITE(?) + PUMPELLYITE + ZOISITE +
CHLORITE + QUARTZ + CLAY.MINS*
Vesicles -
Percent: 5
Location: AMYGDULES
Filling: CHLORITE,QUARTZ
Filling: PREHNITE,CARB
Leg : 60 Top/Bottom Interval(mm): 390/ 420 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 465.00 Rock Type: IGNEOUS
Core: 50 Sample Midpoint(m) : 466.91 Sect/Pc #: 2/PCE 6
ROCK = PEGMATITIC OLIVINE GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: POIKILITIC*
Groundmass - CLINOPYROXENE ( 60%)
PLAGIOCLASE ( 25%)
OLIVINE ( 15%)
Alteration - SERPENTINITE
Location: GROUNDMASS Replacing: OL
CHLORITE
Location: GROUNDMASS Replacing: OL
MAGNETITE
Location: GROUNDMASS Replacing: OL
ACTINOLITE
Location: CRACKS
FILLS THE FIRST GENERATION OF CRACKS;
COMBINATION
Location: CRACKS
INCLUDES SERPENTINE + CHLORITE WHICH FILL THE
SECOND GENERATION OF CRACKS AND THIS CUTS ACROSS
THE FIRST GENERATION*
Leg : 60 Top/Bottom Interval(mm): 300/ 330 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 474.50 Rock Type: IGNEOUS
Core: 51 Sample Midpoint(m) : 474.82 Sect/Pc #: 1/PCE 5A
ROCK = LEUCOCRATIC GABBRO
NORITE;
Texture: HYPIDIOMORPHIC-GRANULAR*
Groundmass - PLAGIOCLASE ( 80%)
LABRADORITE;
CLINOPYROXENE ( 13%)
ALTERED TO STILPNOMELANE WHICH IS PROBABLY THE
MINOR BROWN MICA;
ORTHOPYROXENE ( 3-5%)
ALTERED;
MAGNETITE ( 1-2%)
Alteration - MICA
Location: GROUNDMASS Replacing: CPX
BROWN MICA IS PROBABLY STILPNOMELANE,SOMETIMES
DEVELOPED TOGETHER WITH CHLOR;
CHLORITE
Location: GROUNDMASS Replacing: OPX
SERPENTINITE
Location: GROUNDMASS Replacing: OPX
MINOR*
Leg : 60 Top/Bottom Interval(mm): 1230/1270 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 474.50 Rock Type: METAMORPHIC
Core: 51 Sample Midpoint(m) : 477.25 Sect/Pc #: 2/PCE 18
ROCK = METABASALT
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
IDENTITY UNCERTAIN,MAY ORIGINALLY HAVE BEEN
SEDIMENTARY,GREENSTONE;
Texture: GRANOBLASTIC AND LEPIDOBLASTIC*
Groundmass - QUARTZ
EPIDOTE
CHLORITE
SPHENE
MINOR;
OPAQUE MINERALS
IDENTITY UNCERTAIN,MAY BE ILMENITE + CLINOZOISITE
+ MAGN*
Leg : 60 Top/Bottom Interval(mm): 990/1020 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 484.00 Rock Type: METAMORPHIC
Core: 52 Sample Midpoint(m) : 485.01 Sect/Pc #: 1/PCE 12
ROCK = PLAGIOCLASE PHYRIC METABASALT
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: PORPHYRITIC;
Where sampled: FRAGMENT IN POLYMICT BRECCIA*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): 0.7-4.0 Morphology: EUHEDRAL
APPROX COMP AN62,MODERATELY ALTERED TO CLAYS,NORMAL
ZONATION*
Groundmass - CLINOPYROXENE ( 55%)
TOTALLY ALTERED;
PLAGIOCLASE ( 17%)
Size(mm): 0.1-0.4
ALTERED;
MAGNETITE ( 13%)
Alteration - SERICITE
Location: PHENOS Replacing: PLAG
CHLORITE
Location: GROUNDMASS Replacing: GROUNDMASS MINS.
PREHNITE
Location: GROUNDMASS Replacing: GROUNDMASS MINS.
ACTINOLITE
Location: GROUNDMASS Replacing: GROUNDMASS MINS.
EPIDOTE
Location: GROUNDMASS Replacing: GROUNDMASS MINS.
Vesicles -
Size(mm): 0.5-1.0
Percent: <1
Location: SCATTERED
Filling: CHLORITE
Shape: SEMI-ROUND
Leg : 60 Top/Bottom Interval(mm): 940/ 970 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 484.00 Rock Type: IGNEOUS
Core: 52 Sample Midpoint(m) : 486.46 Sect/Pc #: 2/PCE 8
ROCK = HORNBLENDE GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
STRONG ALTERATION;
Texture: HYPIDIOMORPHIC-GRANULAR*
Groundmass - HORNBLENDE ( 50%)
GREEN;
LABRADORITE ( 50%)
Alteration - HORNBLENDE
Replacing: PYX
PRIMARY PYROXENE;
COMBINATION
Replacing: PYX
INCLUDES CHLORITE-ACTINOLITE AGGREGATES,MAYBE
ORIGINALLY THERE WERE 2 PYROXENES IN THE ROCK;
SERICITE
Replacing: PLAG
PLAG RATHER INTENSIVELY REPLACED*
Leg : 60 Top/Bottom Interval(mm): 00/ 50 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 493.50 Rock Type: IGNEOUS
Core: 53 Sample Midpoint(m) : 496.53 Sect/Pc #: 3/PCE 1
ROCK = PEGMATITIC OLIVINE GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: POIKILITIC-GRANULAR*
Groundmass - PLAGIOCLASE ( 75%)
OLIVINE ( 10%)
BADLY ALTERED,SOMETIMES TOTALLY;
CLINOPYROXENE ( 10%)
ORTHOPYROXENE ( 5%)
Alteration - COMBINATION
Replacing: OL
INCLUDES MAGNETITE-IDDINGSITE AGGREGATES;
CHLORITE
Replacing: PYROXENES
HORNBLENDE
Replacing: PYROXENES
GREEN HBLD;
SERICITE
Replacing: PLAG
CLAY MINERALS
Replacing: PLAG
Leg : 60 Top/Bottom Interval(mm): 630/ 670 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 493.50 Rock Type: IGNEOUS
Core: 53 Sample Midpoint(m) : 497.15 Sect/Pc #: 3/PCE 3
ROCK = TONALITE
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
FOLIATED,RECRYSTALLIZATION;
Texture: LEPIDOGRANOBLASTIC*
Groundmass - PLAGIOCLASE ( 50%)
APPROX COMP AN25-AN2-5,OLIGOCLASE-ALBITE,NORMAL
ZONATION;
QUARTZ ( 40%)
HORNBLENDE ( 7-10%)
MAGNETITE ( 1-2%)
BIOTITE
SUBORDINATE;
APATITE
ZIRCON
KFELDSPAR
Leg : 60 Top/Bottom Interval(mm): 790/ 810 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 493.50 Rock Type: UNIDENTIFIED
Core: 53 Sample Midpoint(m) : 497.30 Sect/Pc #: 3/PCE 4D
ROCK = DOLERITE BRECCIA
BASALTIC,SUBANGULAR ROCK AND MINERAL CLASTS,ROCK
FRAGS(65%) ARE BADLY ALTERED MEDIUM TO FINE GRAIN
DOLERITES,ORIGINALLY WERE PLAG(70%) + CPX(27%) +
MAGN(3%),CEMENT IS 35%;
Texture: CLASTIC,CEMENTED*
Groundmass - PLAGIOCLASE ( 70%)
ALMOST TOTALLY ALTERED,SUBOPHITIC TEXTURE;
CLINOPYROXENE ( 27%)
ALMOST TOTALLY ALTERED,SUBOPHITIC TEXTURE;
MAGNETITE ( 3%)
Alteration - COMBINATION ( 35%)
Location: CEMENT
INCLUDES CARB + CHLOR + CLAY.MINS + EPIDOTE +
PREHNITE + PUMPELLYITE;
CHLORITE
Replacing: CPX
EPIDOTE
Replacing: CPX
BIOTITE
Replacing: CPX
MINOR;
MAGNETITE
Replacing: CPX
AGGREGATES;
CHLORITE
Replacing: PLAG
PUMPELLYITE
Replacing: PLAG
CLAY MINERALS
Replacing: PLAG
Leg : 60 Top/Bottom Interval(mm): 810/ 830 Describer:
Hole: 453 Top of Core Depth(m) : 493.50 Rock Type: IGNEOUS
Core: 53 Sample Midpoint(m) : 497.32 Sect/Pc #: 3/PCE 4D
ROCK = ALTERED DOLERITE
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: INTERSERTAL*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): 0.1-2.0
ZONED RIMS,PARTIALLY ALTERED TO SERICITE*
COMBINATION ( 50%)
INTERSTITIAL MATERIAL INCLUDES AMPHIBOLE +
CHLORITE + FE-TI OXIDE + MINOR EUHEDRAL BIOTITE;
AMPHIBOLE
CHLORITE
BIOTITE
FE-TI OXIDE
Alteration - SERICITE
Replacing: PLAG
PARTIAL ALTERATION OF PLAG;
COMBINATION
Location: INTERSTITIAL
Location: MATERIAL
INCLUDES AMPHIBOLE + CHLORITE + FE-TI OXIDE +
MINOR EUHEDRAL BIOTITE*
Leg : 60 Top/Bottom Interval(mm): 310/ 330 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 503.00 Rock Type: UNIDENTIFIED
Core: 54 Sample Midpoint(m) : 503.32 Sect/Pc #: 1/PCE 2
ROCK = POLYMICT BRECCIA CEMENT
CEMENTED ROCK AND MINERAL FRAGS COMPOSED OF
ALTERED DOLERITES + ANORTHOSITIC GABBROS +
SERPENTINITE + PLAG + (R-SPINEL,MATRIX IS ALL
ALTERATION MINS,PROPORTIONS OF CLASTS AND MATRIX
MINERALS ARE VARIABLE;
Texture: BLASTOCLASTIC,CEMENTED*
Groundmass - SERPENTINITE
PLAGIOCLASE
SPINEL
PICOTITE*
Alteration - COMBINATION
Location: MATRIX
INCLUDES CHLOR + ACTINOLITE + EPIDOTE + ALBITE +
BIOTITE + PREHNITE + LAWSONITE + MAGN + FE-OXY
HYDROXIDES + PUMPELLYITE;
CHLORITE
ACTINOLITE
EPIDOTE
ALBITE
BIOTITE
PREHNITE
LAWSONITE
MAGNETITE
FERROUS HYDROX MINS
PUMPELLYITE
ID UNCERTAIN*
Leg : 60 Top/Bottom Interval(mm): 400/ 470 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 503.00 Rock Type: IGNEOUS
Core: 54 Sample Midpoint(m) : 503.44 Sect/Pc #: 1/PCE 4A
ROCK = ANORTHOSITIC GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: POIKILITIC*
Groundmass - LABRADORITE (80-85%)
COMBINATION (15-20%)
INCLUDES CPX + OPX,BOTH ALTERED;
Alteration - CHLORITE
Location: GROUNDMASS Replacing: OPX
HORNBLENDE
Location: GROUNDMASS Replacing: OPX
GREEN;
CHLORITE
Replacing: CPX
PATCHES OF CHLOR IN CPX XTLS;
SERICITE
Replacing: PLAG
CHLORITE
Replacing: PLAG
COMBINATION
Location: NARROW CRACKS
INCLUDES CHLORITE-ACTINOLITE AGGREGATES FILLING
THE CRACKS*
Leg : 60 Top/Bottom Interval(mm): 750/ 770 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 503.00 Rock Type: IGNEOUS
Core: 54 Sample Midpoint(m) : 503.76 Sect/Pc #: 1/PCE 6
ROCK = AMPHIBOLE GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: HYPIDIOMORPHIC GRANULAR*
Groundmass - HORNBLENDE ( 70%)
PLAGIOCLASE ( 30%)
REPLACED BY PREHNITE(?) + PUMPELLYITE(?),DIFFICULT
TO SAY MORE-THIN SECTION IS TOO THIN*
Alteration - PREHNITE
Replacing: PLAG
IS A SECONDARY MINERAL,COMPOSITION UNCERTAIN;
PUMPELLYITE
Replacing: PLAG
IS A SECONDARY MINERAL,COMPOSITION UNCERTAIN*
Leg : 60 Top/Bottom Interval(mm): 550/ 580 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 503.00 Rock Type: METAMORPHIC
Core: 54 Sample Midpoint(m) : 506.57 Sect/Pc #: 3/PCE 8
ROCK = DOLERITE
SPARSELY PHYRIC METAMORPHOSED FRAGMENT IN GABBRO-
METABASALT POLYMICT BRECCIA;
Texture: SPARSELY PORPHYRITIC;
Where sampled: FRAGMENT IN BRECCIA*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): TO 2 Morphology: EUHEDRAL
APPROX COMP AN50-60,NORMAL ZONATION,SLIGHTLY
ALTERED TO PREHNITE*
Groundmass - PLAGIOCLASE ( 67%)
Size(mm): 0.2-1.0
APPROX COMP AN50;
MAGNETITE ( 3%)
Size(mm): 0.1-0.2
OTHER ( 30%)
Size(mm): TO 0.7
Alteration - CHLORITE ( 25%)
Location: GROUNDMASS Replacing: CPX
BIOTITE ( 5%)
Location: GROUNDMASS Replacing: CPX
PREHNITE ( 1-2%)
Location: PLAG GRAINS Replacing: PLAG
Leg : 60 Top/Bottom Interval(mm): 1060/1090 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 503.00 Rock Type: METAMORPHIC
Core: 54 Sample Midpoint(m) : 507.08 Sect/Pc #: 3/PCE 14
ROCK = PLAG-CPX-OL PORPHYRITIC METABASALT
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: PORPHYRITIC,SUBOPHITIC;
Where sampled: FRAGMENT IN BRECCIA*
Phenocrysts- PLAGIOCLASE ( 30%)
Size(mm): TO 5 Morphology: EUHEDRAL
APPROX COMP AN55;
CLINOPYROXENE ( 1%)
Size(mm): TO 2
AUGITE,SOMETIMES GLOMEROPORPHYRITIC;
OLIVINE ( 1%)
Size(mm): 0.7
IS A REACTION ZONE,IDDINGSITIZED*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.3-0.7
APPROX COMP AN50,SUBOPHITIC TEXTURE;
CHLORITE ( 20%)
Size(mm): TO 0.2
CLINOPYROXENE ( 3%)
Size(mm): 0.2-0.5
MAGNETITE ( 3%)
Size(mm): 0.1-0.2
BIOTITE ( 2%)
Size(mm): TO 0.2
Alteration - COMBINATION ( 30%)
Location: GROUNDMASS Replacing: CPX,OL PHENOS
INCLUDES BIOTITE + CHLOR+IDDINGS;
IDDINGSITE
Location: OL PHENOS Replacing: OL
Leg : 60 Top/Bottom Interval(mm): 1440/1480 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 503.00 Rock Type: IGNEOUS
Core: 54 Sample Midpoint(m) : 508.96 Sect/Pc #: 4/PCE 1C
ROCK = ANORTHOSITIC GABBRO
ALTERED FRAGMENT IN GABBRO-METABASALT POLYMICT
BRECCIA;
Texture: PANIDIOMORPHIC-GRANULAR
NOW WITH THE PYX GRAINS CONVERTED INTO
LEPIDOBLASTIC AGGREGATES*
Groundmass - PLAGIOCLASE ( 85%)
LABRADORITE-BYTOWNITE,PARTLY ALTERED;
PYROXENE ( 15%)
ALL PYX GRAINS NOW CONVERTED INTO LEPIDOBLASTIC
AGGREGATES OF ACTINOLITE + CHLORITE + MINOR
CARBONATE + FE-HYDROXIDES
MAGNETITE (TRACE%)
Alteration - SERICITE
Replacing: PLAG
CLAY MINERALS
Replacing: PLAG
COMBINATION
Replacing: ALL PYROXENE GRAINS
INCLUDES AGGREGATES OF ACTINOLITE + CHLOR + MINOR
CARB + FE-HYDROXIDES;
ACTINOLITE
CHLORITE
CARBONATE
FERROUS HYDROX MINS
Leg : 60 Top/Bottom Interval(mm): 250/ 290 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 512.50 Rock Type: IGNEOUS
Core: 55 Sample Midpoint(m) : 515.77 Sect/Pc #: 3/PCE 3B
ROCK = OLIVINE GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: EQUIGRANULAR
WITH SUBPARALLEL ARRANGEMENT OF LIGHT AND DARK-
COLORED MINERALS;
Groundmass - PLAGIOCLASE ( 60%)
ALTERED;
CLINOPYROXENE ( 20%)
ALTERED;
OLIVINE ( 16%)
ALTERED;
ORTHOPYROXENE ( 3%)
MAGNETITE ( 1%)
Alteration - SERPENTINITE
Location: RIMS Replacing: OL GRAINS
HORNBLENDE
Replacing: PYX
MINOR;
SERICITE
Replacing: PLAG
CLAY MINERALS
Replacing: PLAG
Leg : 60 Top/Bottom Interval(mm): 900/ 940 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 512.50 Rock Type: IGNEOUS
Core: 55 Sample Midpoint(m) : 516.42 Sect/Pc #: 3/PCE 5B
ROCK = ALTERED ANORTHOSITIC GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: LEPIDOGRANOBLASTIC*
Groundmass - PLAGIOCLASE ( 85%)
BASIC,PARTLY RECRYSTALLIZED;
PYROXENE ( 13%)
ALTERED CPX AND OPX;
COMBINATION ( 1-2%)
INCLUDES GREEN SPINEL + MAGN*
Alteration - ACTINOLITE
Location: PYROXENES
CHLORITE
Replacing: PYROXENES
MAGNETITE
Replacing: PYROXENES
CHLORITE
Replacing: PLAG
SERICITE
Replacing: PLAG
CLAY MINERALS
Replacing: PLAG
CARBONATE
ZEOLITE
PREHNITE
ID UNCERTAIN,RARE*
Leg : 60 Top/Bottom Interval(mm): 820/ 840 Describer:
Hole: 453 Top of Core Depth(m) : 512.50 Rock Type: UNIDENTIFIED
Core: 55 Sample Midpoint(m) : 517.83 Sect/Pc #: 4/PCE 9A
ROCK = BRECCIA MATRIX
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
CONTAINS PLAG + ALTERATION PRODUCTS OF OTHER
PRIMARY ROCK TYPES,MATRIX IS EXTENSIVELY ALTERED
TO CHLORITE + ZEOLITE + EPIDOTE;
Groundmass - PLAGIOCLASE
Size(mm): 0.1-6.0 Morphology: ANGULAR
LARGE ANGULAR FRAGMENTS ONLY PARTIALLY ALTERED TO
SERICITE BUT REPLACED BY KSPAR *
Alteration - SERICITE
Location: PLAG FRAGS Replacing: PLAG
PLAG PARTIALLY ALTERED BUT REPLACED BY KSPAR ;
CHLORITE
Location: MATRIX
ZEOLITE
Location: MATRIX
EPIDOTE
Location: MATRIX
Leg : 60 Top/Bottom Interval(mm): 1330/1350 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 512.50 Rock Type: IGNEOUS
Core: 55 Sample Midpoint(m) : 518.34 Sect/Pc #: 4/PCE 12C
ROCK = ANORTHOSITIC GABBRO
SOMEWHAT FOLIATED,FRAGMENT IN GABBRO-METABASALT
POLYMICT BRECCIA;
Texture: NEMATO-GRANOBLASTIC*
Groundmass - PLAGIOCLASE ( 65%)
LABRADORITE,ALTERED;
HORNBLENDE ( 25%)
BLUISH GREEN,ALTERED;
SPINEL (TO 10%)
GREEN,ALTERED*
Alteration - CHLORITE
RETROGRADE METAMORPHISM;
ZEOLITE
RETROGRADE METAMORPHISM;
CLAY MINERALS
RETROGRADE METAMORPHISM;
SERICITE
RETROGRADE METAMORPHISM*
Leg : 60 Top/Bottom Interval(mm): 330/ 350 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 522.00 Rock Type: IGNEOUS
Core: 56 Sample Midpoint(m) : 523.84 Sect/Pc #: 2/PCE 6A
ROCK = ALTERED ANORTHOSITIC GABBRO
HYDROTHERMALLY RETROGRADE METAMORPHOSED,FRAGMENT
IN GABBRO-METABASALT POLYMICT BRECCIA,THIN SECTION
IS TOO THICK;
Texture: GRANULAR*
Groundmass - PLAGIOCLASE ( 90%)
COMBINATION ( 10%)
INCLUDES SECONDARY CHLORITE + ACTINOLITE + MAGN*
Alteration - CHLORITE
ACTINOLITE
MAGNETITE
Leg : 60 Top/Bottom Interval(mm): 850/ 870 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 522.00 Rock Type: IGNEOUS
Core: 56 Sample Midpoint(m) : 524.36 Sect/Pc #: 2/PCE 12A
ROCK = ALTERED GABBRO
HYDROTHERMALLY RETROGRADE METAMORPHOSED,FRAGMENT
IN GABBRO-METABASALT POLYMICT BRECCIA;
Groundmass - PLAGIOCLASE
PARTLY CONVERTED TO FINE GRAINED AGGREGATE OF
SERICITE + CHLORITE + CLAY.MINS + PROBABLY
PREHNITE AND PUMPELLYITE;
OPAQUE MINERALS
ALL REPLACED BY CHLORITE + ACTINOLITE + MINOR
EPIDOTE,THESE FILL THE CRACKS AS WELL*
Alteration - SERICITE
Replacing: PLAG
CHLORITE
Replacing: PLAG
CLAY MINERALS
Replacing: PLAG
PREHNITE
Replacing: PLAG
IDENTITY UNCERTAIN;
PUMPELLYITE
Replacing: PLAG
IDENTITY UNCERTAIN;
CHLORITE
Replacing: MAFIC MINERALS
ACTINOLITE
Replacing: MAFIC MINERALS
EPIDOTE
Replacing: MAFIC MINERALS
Leg : 60 Top/Bottom Interval(mm): 100/ 120 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 531.50 Rock Type: METAMORPHIC
Core: 57 Sample Midpoint(m) : 534.61 Sect/Pc #: 3/PCE 2
ROCK = TROCTOLITE
HYDROTHERMALLY RETROGRADE METAMORPHOSED,FRAGMENT
IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: EQUIGRANULAR,CUMULUS*
Groundmass - PLAGIOCLASE ( 85%)
BYTOWNITE,ALTERED;
COMBINATION ( 15%)
INCLUDES ALTERED INTERCUMULUS OL + MAGN;
OLIVINE
MAGNETITE
Alteration - SERPENTINITE
Replacing: OL
CHLORITE
Replacing: OL
MAGNETITE
Replacing: OL
SERICITE
Replacing: PLAG
CLAY MINERALS
Replacing: PLAG
Leg : 60 Top/Bottom Interval(mm): 330/ 360 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 531.50 Rock Type: METAMORPHIC
Core: 57 Sample Midpoint(m) : 536.35 Sect/Pc #: 4/PCE 3A
ROCK = PEGMATITIC OLIVINE ANORTHOSITIC GABBRO
HYDROTHERMALLY RETROGRADE METAMORPHOSED,FRAGMENT
IN GABBRO-METABASALT POLYMICT BRECCIA,ALTERATION
MODERATE TO STRONG;
Texture: POIKILITIC,GRANULAR*
Groundmass - PLAGIOCLASE ( 90%)
CLINOPYROXENE ( 5%)
OLIVINE ( 3%)
MAGNETITE ( 2%)
Alteration - CHLORITE
Replacing: MAFIC MINS.
SERPENTINITE
Replacing: MAFIC MINS.
MAGNETITE
Replacing: MAFIC MINS.
ACTINOLITE
Replacing: MAFIC MINS.
SERICITE
Replacing: PLAG
CHLORITE
Replacing: PLAG
CLAY MINERALS
Replacing: PLAG
Leg : 60 Top/Bottom Interval(mm): 1060/1090 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 531.50 Rock Type: IGNEOUS
Core: 57 Sample Midpoint(m) : 537.08 Sect/Pc #: 4/PCE 11
ROCK = COARSE PEGMATITIC OLIVINE GABBRO
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA,
ALTERATION MODERATE;
Texture: POIKILITIC*
Groundmass - CLINOPYROXENE ( 70%)
PLAGIOCLASE ( 18%)
OLIVINE ( 10%)
MAGNETITE ( 2%)
Alteration - SERPENTINITE
Replacing: OL
CHLORITE
Replacing: PYX
ACTINOLITE
Replacing: PYX
SERICITE
Replacing: PLAG
Leg : 60 Top/Bottom Interval(mm): 1270/1310 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 531.50 Rock Type: IGNEOUS
Core: 57 Sample Midpoint(m) : 537.29 Sect/Pc #: 4/PCE 14
ROCK = ALTERED TROCTOLITE
FRAGMENT IN GABBRO-METABASALT POLYMICT BRECCIA;
Texture: EQUIGRANULAR*
Groundmass - OLIVINE ( 50%)
SERPENTINIZED,SOME RELICT GRAINS STILL PRESERVED;
PLAGIOCLASE ( 50%)
BYTOWNITE;
SPINEL
MINOR,GREEN*
Alteration - SERPENTINITE
Replacing: OL
MAGNETITE
Replacing: OL
CHLORITE
Replacing: OL
BRUCITE
Replacing: OL
CHLORITE
Replacing: PLAG
CLAY MINERALS
Replacing: PLAG
PREHNITE
Replacing: PLAG
IDENTITY UNCERTAIN*
Leg : 60 Top/Bottom Interval(mm): 470/ 490 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 550.50 Rock Type: METAMORPHIC
Core: 59 Sample Midpoint(m) : 550.98 Sect/Pc #: 1/PCE 9
ROCK = TOTALLY ALTERED PYROCLASTIC VOLCANIC ROCK
METAVOLCANIC,MINOR METAGABBRO POLYMICT BRECCIA,
HYDROTHERMALLY ALTERED,COMPOSED OF AMYGDULES AND
MATRIX,AMYGDULES(7% ROCK VOLUME) FILLED BY QUARTZ
+ CARBONATE + ZEOLITE(?),THE SAME MINERALS ARE IN
CRACKS TOGETHER WITH CHLORITE + CLAY.MINS,MATRIX
IS VERY FINE GRAINED AGGREGATE OF CLAY.MINS +
QUARTZ + CHLORITE + CARBONATE + MAGN GRAINS(UP TO
0.1MM);
Texture: AMYGDALOIDAL,GRANO- AND LEPIDOGRANOBLASTIC*
Alteration - CARBONATE
Location: CRACKS
QUARTZ
Location: CRACKS
ZEOLITE
Location: CRACKS
CHLORITE
Location: CRACKS
CLAY MINERALS
Location: CRACKS,MATRIX
QUARTZ
Location: MATRIX
CHLORITE
Location: MATRIX
CARBONATE
Location: MATRIX
MAGNETITE
Location: MATRIX
Vesicles -
Percent: 7.0
Location: AMYGDULES
Filling: CARB,QUARTZ,
Filling: ZEOLITE
Leg : 60 Top/Bottom Interval(mm): 800/ 830 Describer: Sharaskin, A.
Hole: 453 Top of Core Depth(m) : 588.50 Rock Type: METAMORPHIC
Core: 63 Sample Midpoint(m) : 589.32 Sect/Pc #: 1/PCE 4A
ROCK = GABBRO-NORITE
BADLY SHEARED,SERPENTINIZED,COMPOSED OF CLASTS OF
DEFORMED GABBRO WITH ABUNDANT GREEN HBLD
(SECONDARY AFTER PYX) CEMENTED BY A SERPENTINIZED
MATRIX,RARE STILPNOMELANE OR BIOTITE;
Texture: CLASTIC,FOLIATED*
Groundmass - CLINOPYROXENE (80-85%)
COMPLETELY ALTERED;
PLAGIOCLASE (15-18%)
COMPLETELY ALTERED;
OPAQUE MINERALS ( 2-5%)
BIOTITE ( RARE%)
STILPNOMELANE ( RARE%)
Alteration - HORNBLENDE
Replacing: PYX
GREEN;
SERPENTINITE
Location: MATRIX
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