Initial Reports Volume 185 Chapter 4, Table T5. Igneous core description logs, Holes 1149B, 1149C, and 1149D Notes: Lithology is shown diagrammatically in Figure F32C, p. 94. PP = physical properties, - = no analysis, TSB(2) = second thin section billet, TSB = thin section billet, XRF = X-ray fluorescence, Y = yes, N = no. Core, Piece Depth (mbsf) Interval Length (cm) Subunit Chilled margin present section numbers Analysis Top Bottom (cm) Interval Unit Subunit number Lithology Texture Structure Color Comments Top Base 185-1149B- 29R-1 PP 406.80 407.77 0-97 97 - - - Sediment - Sediment Pink Carbonate-rich sediment - N 29R-1 - 407.77 408.28 97-148 51 942 78 1-1 Aphyric basalt breccia with sediment cement Microcrystalline Basalt breccia sediment cement Dark bluish gray and reddish gray Contact with overlying sediment not observed, altered basalts with halos around veins N 29R-2 1 TSB(2), PP 408.28 408.55 0-27 27 942 78 1-1 Pink carbonate cement Microcrystalline Dark bluish gray and reddish gray with dark reddish gray veins Basalt breccia has clasts up to 20 cm and fine-grained pink sedimentary carbonate cement N N 29R-2 2-10 - 408.55 409.23 27-95 68 942 68 1-2 Aphyric basalt Microcrystalline Pillow/flow Dark bluish gray and reddish gray Basalt pieces with halos, rubbly interval N N 29R-2 11-14 TSB 409.23 409.68 95-140 45 942 45 1-3 Aphyric basalt Hypocrystalline to microcrystalline Pillow Dark bluish gray and reddish gray Dark bluish gray halos around dusky red veins and reddish gray altered basalt, chill at base N Y 29R-3 1-3 - 409.68 410.11 0-43 43 942 43 1-4 Aphyric basalt Fine grained to microcrystalline Pillow Dark bluish gray and reddish gray Dark dusky red veins, dark bluish gray halos, reddish gray altered basalt, chill at base N Y 29R-3 4-8 XRF 410.11 410.62 43-94 51 942 51 1-5 Aphyric basalt Microcrystalline Pillow Dark bluish gray and reddish gray Dark dusky red veins, dark bluish gray halos, reddish gray altered basalt, rubbly N N 30R-1 1-9 - 416.40 416.95 0-55 55 942 55 1-6 Aphyric basalt Microcrystalline Pillow Dark bluish gray and reddish gray Fe oxyhydroxides between reddish gray altered basalt and dark bluish gray halos N N 30R-1 10A-12 - 416.95 417.44 55-104 49 942 49 1-7 Aphyric basalt Microcrystalline basalt Pillow breccia Dark greenish grey and gray, dusky red Carbonate cement with <1-cm dusky red and dark green fragments, chilled piece at base N Y 30R-1 13-19 - 417.44 417.90 104-150 46 942 46 1-8 Aphyric basalt Fine grained to microcrystalline Pillow Dark bluish gray and reddish gray Dark greenish gray veins, halos present; altered basalt is dark dusky red in some pieces N N 30R-2 1-4 XRF 417.90 419.02 0-112 112 942 112 1-9 Aphyric basalt Fine grained to microcrystalline Pillow/flow Dark bluish gray and reddish gray Lower rim of pillow is subvertical and highly irregular N Y 30R-2 4-7 - 419.02 419.25 112-135 23 942 40 1-10 Aphyric basalt pillows, interpillow breccia Microcrystalline basalt Pillow breccia Dark reddish gray and dark greenish gray, altered pillow rims white carbonate Carbonate infilling irregular chilled pillow margin N N 30R-3 1 - 419.25 419.42 0-17 17 942 40 1-10 Carbonate-bearing cement Coarse carbonate Various chills and pillow rims, brecciated glassy contact between two pillows at base of subunit N N 30R-3 2-9 - 419.42 419.94 17-69 52 942 52 1-11 Aphyric basalt Microcrystalline Pillow Dark reddish gray Top of Subunit 1-11 is rubbly, chill at top Y N 31R-1 1-22 - 426.00 427.20 0-120 120 942 120 1-12 Breccia Microcrystalline to hypocrystalline Pillow breccia Dark greenish gray and gray, dusky red Green concentric alteration in rounded basalt fragments, red matrix, various glassy chills, rubbly N N 31R-1 23-26 - 427.20 427.50 120-150 30 942 40 1-13 Aphyric basalt Microcrystalline Pillow Gray to light brownish gray Dusky red veins and carbonate veins, dark bluish gray halos, reddish gray altered basalt, rubbly N N 31R-2 1 - 427.50 427.60 0-10 10 942 40 1-13 Aphyric basalt Microcrystalline Gray to light brownish gray Fractured carbonate veins, dark bluish gray halos, reddish gray altered basalt N N 32R-1 1-4 - 435.60 436.19 0-59 59 942 59 1-14 Aphyric basalt Microcrystalline Pillow Reddish gray to greenish gray Dusky red veins, carbonate veins, dark bluish gray halos, reddish gray altered basalt, rubbly N Y? 32R-1 5-17 - 436.19 437.03 59-143 84 942 84 1-15 Aphyric basalt Microcrystalline to fine grained at base Pillow/flow Reddish gray to greenish gray Dusky red veins, carbonate veins, dark bluish gray halos, reddish gray altered basalt, rubbly Y? N 185-1149C- 9R-1 - - 397.90 398.41 0-51 51 - - - Sediment - Sediment Beige brown Cherty sediment N N 9R-1 1-8 - 398.41 399.00 51-110 59 399 59 1-1 Aphyric basalt Microcrystalline Pillow Dark bluish gray, reddish gray Contact with overlying cherty sediment not observed, altered basalts with halos around veins, rubbly N N 10R-1 1-10 - 407.50 408.22 0-72 72 - 72 1-2 Aphyric basalt Microcrystalline Pillow/flow Dark bluish gray, reddish gray Chilled pillow rim at top, some carbonate veins, dark bluish gray halos, reddish gray altered basalt Y Y 10R-1 11-16 - 408.22 408.55 72-105 33 - 33 1-3 Aphyric basalt Microcrystalline Pillow Dark bluish gray, reddish gray Chilled pillow rim at top, basalt pieces with halos, contact with carbonate breccia cement at base not chilled Y N 10R-1 16-22 - 408.55 409.00 105-150 45 - 87 1-4 Breccia Microcrystalline basalt fragments Breccia Dark bluish gray, reddish gray Carbonate breccia matrix with 2.5 to 20 cm subangular to angular microcrystalline basalt fragments N N 10R-2 1-9 - 409.00 409.42 0-42 42 - 87 1-4 Breccia Microcrystalline basalt fragments Breccia Dark bluish gray, reddish gray Carbonate breccia matrix with 2.5 to 20 cm subangular to angular microcrystalline basalt fragments N N 10R-2 9-10 - 409.42 409.52 42-52 10 - 54 1-5 Aphyric basalt Fine grained to microcrystalline Pillow Dark bluish gray, reddish gray Dark dusky red veins, dark bluish gray halos, reddish gray altered basalt, rubbly Y N 11R-1 1A-3 - 417.10 417.54 0-44 44 - 54 1-5 Aphyric basalt Fine grained to microcrystalline Pillow Dark bluish gray, reddish gray Dark bluish gray halos around dusky red veins, reddish gray altered basalt, chill at base N Y 11R-1 3-13 - 417.54 418.48 44-138 94 - 94 1-6 Aphyric basalt Fine grained to microcrystalline Pillow/flow Dark bluish gray, reddish gray Altered hyaloclastite at top, dark dusky red veins, dark bluish gray halos, reddish gray altered basalt Y N 185-1149D- 5R-1 - - 300.30 300.46 0-16 16 - - - Sediment Fine-grained chert Sediment Red brown Cherty sediment, contact with basement not recovered N N 5R-1 1 - 300.46 300.52 16-22 6 6 - 1 Aphyric basalt Microcrystalline Pillow Dark bluish gray, reddish gray More olivine phenocrysts, different alteration style N N 5R-2 2-5 - 300.52 300.71 22-41 19 747 288 2-1 Aphyric basalt Microcrystalline Flow Dark bluish gray, reddish gray Small pieces with pronounced halos, speckled appearance N N 6R-1 1-21 - 310.00 311.34 0-134 134 - Aphyric basalt Microcrystalline Flow Reddish gray, bluish gray Red veins, halos, speckled appearance, no chills N N 6R-2 1-11 - 311.34 312.40 0-106 106 - Aphyric basalt Microcrystalline Flow Reddish gray, bluish gray Very pronounced halos, carbonate veins, no chills N N 7R-1 1-4 - 319.70 319.99 0-29 29 - Aphyric basalt Microcrystalline Flow Reddish gray, bluish gray Fractured pieces with dark red veins and carbonate veins N N 7R-1 5 - 319.99 320.12 29-42 13 - 13 2-2 Hyaloclastite Hypocrystalline Breccia Dark green Elongate green clasts with red rims, clasts up to 3-4 cm long in a green matrix, cement supported N N 7R-1 6-7 - 320.12 320.26 42-56 14 - 14 2-3 Aphyric basalt Microcrystalline Pillow Reddish gray, bluish gray Two pieces, not oriented; there may be material missing N Y 7R-1 8-9 - 320.26 320.40 56-70 14 - 14 2-4 Aphyric basalt Microcrystalline Pillow Reddish gray, bluish gray Two pieces, not oriented; there may be material missing Y N 7R-1 10 - 320.40 320.45 70-75 5 - 5 2-5 Hyaloclastite Hypocrystalline Breccia Dark green and white Dark green altered glassy clasts; cement is carbonate with some pale greenish clays N N 7R-1 11-20 - 320.45 321.20 75-150 75 - 75 2-6 Aphyric basalt Microcrystalline Pillow/flow Reddish gray, bluish gray Pronounced halos, dark red veins, carbonate veins N N 7R-2 1-6 - 321.20 321.75 0-55 55 - 55 2-7 Aphyric basalt Microcrystalline Pillow/flow Reddish gray, bluish gray Small pieces at top and one fractured piece, pronounced halos, dark red veins, carbonate veins N Y 7R-2 7-16 - 321.75 322.40 55-120 65 - 65 2-8 Aphyric basalt Microcrystalline Pillow/flow Reddish gray, bluish gray 2-cm interpillow material and glass at top, halos, carbonate veins, red veins throughout Y Y 7R-2 16-20 - 322.40 322.64 120-144 24 - 53 2-9 Aphyric basalt Microcrystalline Pillow/flow Reddish gray, bluish gray Rubbly and fractured basalt pieces, chill with small amounts of glass in the top piece Y N 7R-3 1-3 - 322.64 322.93 0-29 29 - Aphyric basalt Microcrystalline Pillow/flow Reddish gray, bluish gray 1-cm-wide vein with carbonate or recrystallized interpillow material and a very small amount of breccia N N 8R-1 1-15 - 329.30 330.80 0-150 150 - 165 2-10 Aphyric basalt Microcrystalline Flow Reddish gray, bluish gray Pronounced halos, dark red veins, carbonate veins N N 8R-2 1 - 330.80 330.95 0-15 15 - Aphyric basalt Microcrystalline Flow Reddish gray, bluish gray One fractured piece with pronounced halos, dark red veins, carbonate veins N N 8R-2 2 - 330.95 331.35 15-55 40 713 40 3-1 Aphyric basalt Microcrystalline Pillow Reddish gray, bluish gray 4 cm of interpillow material at top with wavy contact; basalt has a slightly speckled appearance Y Y 8R-2 3 - 331.35 331.40 55-60 5 - 5 3-2 Hyaloclastite Microcrystalline basalt Breccia Dark green and white Glass and altered glass clasts in a carbonate matrix Y Y 8R-2 4-8 - 331.40 331.81 60-101 41 - 41 3-3 Aphyric basalt Microcrystalline Pillow Reddish gray, bluish gray Thin dark red veins, carbonate veins, halos present Y N 8R-2 9-13 - 331.81 332.22 101-142 41 - 41 3-4 Aphyric basalt Microcrystalline, hypocrystalline at base Pillow Reddish gray, bluish gray Thin dark red veins, carbonate veins, halos present Y N 9R-1 1-2 - 338.80 338.90 0-10 10 - 10 3-5 Aphyric basalt Microcrystalline Pillow Reddish gray, bluish gray Subvertical glassy chill on Piece 2, dark red veins, carbonate veins, halos present N Y 9R-1 3-6 - 338.90 339.15 10-35 25 - 25 3-6 Aphyric basalt Microcrystalline Pillow Reddish gray, bluish gray Small pieces with chills near vertical pillow contact or pile of pillows with material not recovered Y Y 9R-1 7-10 - 339.15 339.46 35-66 31 - 31 3-7 Aphyric basalt Microcrystalline Pillow Reddish gray, orange, bluish gray Dark bluish gray halos with orange-brown Fe-oxyhydroxide zone adjacent to reddish gray basalt Y Y 9R-1 11-18 - 339.46 339.98 66-118 52 - 52 3-8 Aphyric basalt Microcrystalline Pillow/flow Reddish gray, orange, greenish gray Abundant carbonate veins, horizontal glassy chill at the base Y Y 9R-2 1-4 - 339.98 340.69 0-71 71 - 71 3-9 Aphyric basalt Microcrystalline with fine-grained center Pillow/flow Reddish gray, bluish gray Pronounced halos, abundant dark red veins and carbonate veins, horizontal chill at the base N Y 9R-2 5-16 - 340.69 341.48 71-150 79 - 79 3-10 Aphyric basalt Microcrystalline with fine-grained center Pillow/flow Reddish gray, bluish gray Glassy chill on pieces at top and base, thin dark-red veins, carbonate veins, halos present Y Y 9R-3 1-10 - 341.48 342.13 0-65 65 - 92 3-11 Aphyric basalt Microcrystalline Pillow/flow Reddish gray, bluish gray, gray Dark bluish gray halos with orange-brown Fe oxyhydroxide zone adjacent to reddish-gray basalt, carbonate, red veins N N 10R-1 1-4 - 348.40 348.67 0-27 27 - Aphyric basalt Microcrystalline Pillow/flow Reddish gray, bluish gray, gray Dark bluish gray halos with orange brown Fe oxyhydroxide zone adjacent to reddish-gray basalt, carbonate, red veins N N 10R-1 5 - 348.67 348.73 27-33 6 - 6 3-12 Hyaloclastite Hypocrystalline altered basalt clasts Breccia Dark greenish gray, white Breccia with carbonate matrix and light greenish gray clays, clasts up to 5 cm N N 10R-1 6A-6C - 348.73 349.47 33-107 74 - 74 3-13 Aphyric basalt Microcrystalline with fine-grained center Pillow/flow Greenish gray One coherent piece, halos present but more diffuse N N 10R-1 7-8 - 349.47 349.70 107-130 23 - 23 3-14 Aphyric basalt Microcrystalline Pillow Dark greenish gray white, gray Contains some brecciated pieces with carbonate cement, mix of large fractured clasts and small ones N N 10R-1 9-10 - 349.70 349.90 130-150 20 - 35 3-15 Aphyric basalt Microcrystalline Pillow Greenish gray to gray Pronounced halos, dark red veins, carbonate veins N N 10R-2 1 - 349.90 350.05 0-15 15 - Aphyric basalt Microcrystalline Pillow Greenish gray to gray Pronounced halos, dark red veins, carbonate veins N N 10R-2 2-7 - 350.05 350.49 15-59 44 - 56 3-16 Aphyric basalt Microcrystalline Pillow Greenish gray to gray Rubbly pieces, some brecciated pieces with carbonate cement N N 11R-1 1-2 - 357.90 358.02 0-12 12 - Aphyric basalt Microcrystalline Pillow Greenish gray to gray Rubbly pieces, some brecciated pieces with carbonate cement N N 11R-1 3-6 - 358.02 358.34 12-44 32 - 32 3-17 Hyaloclastite Microcrystalline to hypocrystalline clasts, fine clay cement Breccia Dark green with weak red alteration Variable clast size 1 mm up to 5 cm, dark grayish green altered glass clasts with light greenish gray matrix N N 11R-1 7-14 - 358.34 359.24 44-134 90 652 233 4-1 Aphyric basalt Microcrystalline to hypocrystalline Flow Variable gray to very dark gray ?Flow top, highly altered with irregular carbonate-filled void spaces, rusty brown to dark brown veins N N 11R-2 1-10 - 359.24 360.67 0-143 143 - Aphyric basalt Microcrystalline to hypocrystalline Flow Variable gray to very dark gray Four thin <5-cm intervals of fine breccia with carbonate cement, highly altered with irregular carbonate-filled voids N N 11R-3 1-6 - 360.67 362.14 0-147 147 - 147 4-2 Breccia Microcrystalline to hypocrystalline clasts, coarse cement Breccia Gray to very dark gray, white One piece (#4) is similar to hyaloclastite in Subunit 3-17; breccia has subangular frayed clasts of variable size N N 11R-4 1-6 - 362.14 362.69 0-55 55 - 91 4-3 Aphyric basalt Microcrystalline Flow Variable gray to very dark gray Pronounced halos present in some pieces, dark red veins, carbonate veins N N 12R-1 1-9 - 367.40 367.76 0-36 36 - Aphyric basalt Microcrystalline Flow Reddish gray, bluish gray, gray Rubbly subunit with some brecciated pieces, several carbonate-filled voids N N 12R-1 9-13 - 367.76 368.07 36-67 31 - 31 4-4 Aphyric basalt Microcrystalline Pillow Reddish gray, bluish gray, gray Rubbly subunit with some brecciated pieces, several carbonate-filled voids Y N 13R-1 1-2 - 377.00 377.26 0-26 26 - 26 4-5 Hyaloclastite Microcrystalline to hypocrystalline clasts, fine clay cement Breccia Dark green with weak red alteration Dark-greenish-gray matrix, variable clast size 1 mm to 5 cm; clasts are subrounded altered glass N N 13R-1 3-12 - 377.26 377.83 26-83 57 - 57 4-6 Aphyric basalt Microcrystalline Pillow Variable gray to very dark gray Fractured rubbly pieces; some are brecciated; carbonate veins present; basalt has a mottled appearance N N 13R-1 13-16 - 377.83 378.08 83-108 25 - 25 4-7 Hyaloclastite Microcrystalline to hypocrystalline clasts, fine clay matrix Breccia Dark green and very dark gray Clast-supported hyaloclastite with small green altered glass clasts and very dark gray basalt clasts up to 5 cm N N 13R-1 17-22 - 378.08 378.50 108-150 42 - 42 4-8 Aphyric basalt Microcrystalline Pillow Variable gray to very dark gray Fractured rubbly pieces, highly altered with mottled appearance, irregular carbonate-filled vesicles up to 1 cm long N N 14R-1 1-2 - 386.60 386.72 0-12 12 649 12 5-1 Aphyric basalt Microcrystalline Pillow Gray to bluish gray Rubbly pieces, halos present in some pieces, thin dark red veins, carbonate veins N N 14R-1 3-4 - 386.72 386.84 12-24 12 - 12 5-2 Breccia Microcrystalline to hypocrystalline Breccia Dark greenish gray and white Hyaloclastite with small green altered glass clasts and very dark gray basalt clasts up to 5 cm, carbonate and clay matrix N N 14R-1 5-8 - 386.84 387.05 24-45 21 - 21 5-3 Aphyric basalt Microcrystalline Pillow Gray to bluish gray Rubbly pieces, halos present in some pieces, thin dark red veins, carbonate veins N N 15R-1 1-3 - 396.30 396.47 0-17 17 - 17 5-4 Breccia Microcrystalline Breccia Greenish gray to bluish gray Small rubbly hyaloclastite pieces with green altered glass clasts and very dark gray basalt clasts, green clay cement N N 15R-1 4-15 - 396.47 397.26 17-96 79 - 79 5-5 Aphyric basalt Microcrystalline Pillow Gray to bluish gray Rubbly pieces, pronounced halos present in some pieces, thin dark red veins, carbonate veins N N 16R-1 1-21 - 405.90 407.40 0-150 150 - 273 5-6 Breccia Microcrystalline to hypocrystalline Breccia Dark greenish, very dark gray Clast-supported breccia/hyaloclastite with small green altered glass clasts and very dark gray basalt clasts, variable size N N 16R-2 1-9 - 407.40 408.63 0-123 123 - Breccia Microcrystalline to hypocrystalline Breccia Variable very dark gray, white Clast-supported breccia with very dark gray basalt clasts, variable size, sub-mm to 10 cm, clay and carbonate cement N N 16R-2 10-13 - 408.63 408.88 123-148 25 - 61 5-7 Aphyric basalt Microcrystalline Pillow/flow Gray to bluish gray Halos present in some pieces, thin carbonate veins, vesicles up to 2 mm in diameter filled with smectite and carbonate N N 16R-3 1-6 - 408.88 409.24 0-36 36 - Aphyric basalt Microcrystalline Pillow/flow Gray to bluish gray Rubbly, halos present in some pieces, thin carbonate veins N N 17R-1 1-20 - 415.50 417.00 0-150 150 - 174 5-8 Breccia Microcrystalline to hypocrystalline Breccia Dark greenish gray, white Basalt clasts range in size up to 10 cm; halos are present in some of the basalt clasts N N 17R-2 1-4 - 417.00 417.24 0-24 24 - Breccia Microcrystalline to hypocrystalline Breccia Dark greenish gray, white Breccia with carbonate and dark grayish green clay matrix; some parts clast supported, other parts matrix supported N N 17R-2 5-14 - 417.24 417.84 24-84 60 315 60 6-1 Aphyric basalt Microcrystalline Pillow/flow Dark gray Rubbly pieces, pronounced halos present in some pieces, thin dark red veins, carbonate veins, last piece finer grained N N 18R-1 1-4 - 425.10 425.52 0-42 42 - 42 6-2 Aphyric basalt Microcrystalline Pillow Dark gray Pronounced halos present in some pieces, carbonate veins N Y 18R-1 5-16 - 425.52 426.49 42-139 97 - 97 6-3 Aphyric basalt Microcrystalline with fine- grained center Pillow/flow Dark gray Chills at top and base of subunit and subvertical glassy chill on Piece 7, carbonate veins and halos present Y Y 19R-1 1-5 - 434.70 434.94 0-24 24 - 24 6-4 Breccia Microcrystalline clasts Breccia Gray to dark gray Angular basalt clasts up to 5 cm; some contain halos in carbonate cement N N 19R-1 6-15 - 434.94 435.47 24-77 53 - 53 6-5 Aphyric basalt Fine grained to microcrystalline Pillow/flow Dark gray Halos present in some pieces, thin dark red veins, carbonate veins N Y 19R-1 16-22 - 435.47 435.86 77-116 39 - 39 6-6 Aphyric basalt Fine grained to microcrystalline Pillow Dark gray Rubbly small pieces, pronounced halos present in some pieces, thin dark red veins, carbonate veins N N