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Table T6. Summary of primary and secondary mineralogy determined by thin section microscopy observation and XRD.

Core, section
(Piece)
Lith.
unit
Thin
section
Rock name Grain size Texture Thin section XRD Total
alteration
(%)
Primary
minerals
Secondary
minerals
Primary
minerals
Secondary
minerals
336-U1383C-
2R-1 (7) 1-1               Phillipsite (Na)
Calcite
 
2R-2 (3) 1-1 28 Sparsely plagioclase-olivine-phyric basalt, avesicular Glassy to microcrystalline Hyalophytic Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Glass
Zeolite
Palagonite
Mixed plagioclase, diopside/augite   15
3R-3 (7) 1-1 29 Sparsely plagioclase-olivine-phyric basalt Microcrystalline to fine grained Hyalophytic to fine grained Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
Carbonate
Zeolite
Mixed plagioclase, diopside/augite   7.2
3R-1 (2) 1-1 30 Avesicular sparsely plagioclase-phyric basalt Microcrystalline Hyalophytic Olivine
Plagioclase
Clinopyroxene
Clay
FeOOH
Zeolite
Mixed plagioclase, diopside/augite   39
3R-2 (5) 1-1 31 Sparsely plagioclase-olivine-phyric basalt Microcrystalline Porphyritic Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
FeOOH
Mixed plagioclase, diopside/augite, olivine   10
5R-1 (6) 1-5 32 Sparsely plagioclase-olivine-phyric basalt Cryptocrystalline to microcrystalline Hyalophytic to trachytic Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay Mixed plagioclase, diopside/augite, olivine   4
5R-1 (11) 1-5 33 Sparsely plagioclase-olivine-phyric basalt Microcrystalline Hyalophytic to trachytic Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay
Zeolite
    10
6R-1 (17) 1-7 34 Sparsely plagioclase-olivine-phyric avesicular basalt (chilled margin) Glassy to microcrystalline Hyalophitic to aphanitic to intersertal Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Glass
Clay
Zeolite
Mixed plagioclase, diopside/augite   23.5
6R-1 (7) 1-7 35 Sparsely plagioclase-olivine-phyric avesicular basalt (chilled margin) Glassy to microcrystalline Hyalophitic to aphanitic to intersertal Plagioclase
Fe-Ti oxide
Sulfide
Glass
Clay     5
7R-2 (8) 1-7 36 Sparsely plagioclase-olivine-phyric sparsely vesicular basalt Micro- to cryptocrystalline Intersertal Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay
FeOOH
Mixed plagioclase, diopside/augite, olivine   5
7R-2 (16) 1-9 38 Moderately plagioclase-olivine-phyric sparsely vesicular basalt Micro- to cryptocrystalline Intersertal Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay
Zeolite
Mixed plagioclase, diopside/augite   35.5
9R-3 (10) 2-1 39 Moderately plagioclase-olivine-phyric sparsely vesicular basalt Microcrystalline Intersertal Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay
Zeolite
Mixed plagioclase, diopside/augite   18
9R-4 (9) 2-1 40 Highly plagioclase-olivine-phyric sparsely vesicular basalt Microcrystalline Intersertal Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay Mixed plagioclase, diopside/augite, olivine   1
10R-1 (7) 2-1 41 Plagioclase-olivine-phyric basalt Microcrystalline Porphyritic Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
Zeolite
Mixed plagioclase, diopside/augite   3–15?
10R-2 (1b) 2-3 43 Avesicular, plagioclase-olivine-phyric basalt Fine grained Porphyritic, intersertal groundmass Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay Mixed plagioclase, diopside/augite, olivine   2
13R-1 (5) 3-4 44 Aphyric sparsely vesicular basalt Microcrystalline Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay
FeOOH
Mixed plagioclase, diopside/augite Clay 8.5
16R-1 (3) 3-6 45 Aphyric sparsely vesicular basalt Microcrystalline Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay
FeOOH
Carbonate
Mixed plagioclase, diopside/augite, olivine   6
16R-1 (14) 3-6 46 Aphyric basalt with blotchy alteration Crypto- to microcrystalline Hyalophitic Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay Mixed plagioclase, diopside/augite, olivine   4
16R-2 (6) 3-6 47 Sparsely vesicular aphyric basalt Crypto- to microcrystalline Aphanitic Olivine
Plagioclase
Clay
Carbonate
Zeolite
Mixed plagioclase, diopside/augite, olivine   3
16R-2 (7) 3-6 48 Aphyric sparsely vesicular basalt Microcrystalline Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
Zeolite
    23
19R-1 (6b) 3-6 49 Aphyric basalt with blotchy alteration Cryptocrystalline Hyalophitic Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
Palagonite
    2
20R-1 (28) 3-13 50 Hyaloclastite     Olivine
Plagioclase
Glass
FeOOH
Zeolite
Palagonite
Calcedony
    50
20R-1 (9) 3-10 51 Aphyric sparsely vesicular basalt Microcrystalline Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
FeOOH
Pyrite
Zeolite
Mixed plagioclase, diopside/augite   25
23R-1 (10) 3-20 52 Aphyric sparsely vesicular basalt Microcrystalline Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay
FeOOH
Mixed plagioclase, diopside/augite, olivine   16
25R-1 (14) 3-22 53 Aphyric basalt with blotchy alteration Microcrystalline Aphanitic to hyalophytic Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
Zeolite
Mixed plagioclase, diopside/augite, olivine   12
27R-1 (19) 3-22             Mixed plagioclase, diopside/augite, olivine    
28R-1 (7) 3-22 54 Aphyric basalt Microcrystalline Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay Mixed plagioclase, diopside/augite, olivine   4
29R-1 (14) 3-24 55 Aphyric sparsely vesicular basalt Microcrystalline Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
FeOOH
Pyrite
Carbonate
Mixed plagioclase, diopside/augite, olivine Phillipsite (Na) 15
31R-2 (1) 3-26 56 Aphyric sparsely vesicular basalt Microcrystalline Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
FeOOH
Pyrite
Mixed plagioclase, diopside/augite, olivine   7
31R-2 (6) 3-26 57 Aphyric sparsely vesicular basalt Crypto- to microcrystalline Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Clay
FeOOH
Carbonate
Zeolite
Mixed plagioclase, diopside/augite Phillipsite (Na) 22
32R-2 (9) 3-26 58 Aphyric basalt Fine grained Intersertal Olivine
Plagioclase
Clinopyroxene
Fe-Ti oxide
Sulfide
Clay Mixed plagioclase, diopside/augite   6

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