Table T2. Representative microprobe analyses of clinopyroxene.
Hole:
195-1201D-
Core, section,
piece, interval (cm):
46R-3 (Piece 10, 99–101)
46R-4 (Piece 6A, 24–27)
47R-2 (Piece 12, 109–111)
Analysis label:
115-126-4
115-126-5
117-29-5
117-29-6
117-30-2
124-46-1
124-46-2
Description:
Microphenocryst, core
Microphenocryst, rim
Microphenocryst, core
Microphenocryst, rim
Altered microlite
Microphenocryst, core
Microphenocryst, rim
Major element oxides (wt%):
SiO2 54.55 51.90 52.82 52.96 51.32 51.95 49.42
TiO2 0.20 0.41 0.18 0.48 0.34 0.45 0.94
Al2O3 1.88 3.92 2.12 3.70 3.44 3.23 5.74
Cr2O3 0.52 0.71 0.87 0.27 1.17 0.47 0.16
FeO 5.83 4.49 4.22 5.04 4.33 5.04 6.42
MnO 0.20 0.21 0.14 0.19 0.03 0.00 0.19
MgO 20.51 17.55 18.03 17.42 17.00 17.76 15.51
CaO 17.11 20.64 20.97 21.35 21.81 21.16 21.13
Na2O 0.10 0.18 0.19 0.18 1.45 0.17 0.17
Totals: 100.90 100.00 99.54 101.59 100.90 100.24 99.67
Fe2O3 0.06 1.68 1.95 1.07 9.75 2.79 2.57
FeO 5.77 2.98 2.47 4.07 -4.44 2.54 4.10
Totals: 100.91 100.17 99.74 101.69 101.88 100.52 99.93
Mineralogy (a.f.p.u.):
Si 1.957 1.888 1.929 1.901 1.837 1.886 1.820
AlIV 0.043 0.112 0.071 0.099 0.145 0.114 0.180
AlVI 0.037 0.056 0.021 0.057 0.000 0.025 0.069
Ti 0.005 0.011 0.005 0.013 0.009 0.012 0.026
Cr 0.015 0.020 0.025 0.008 0.033 0.013 0.005
Fe3+ 0.002 0.046 0.054 0.029 0.263 0.076 0.071
Fe2+ 0.173 0.091 0.075 0.122 -0.133 0.077 0.126
Mn 0.006 0.006 0.004 0.006 0.001 0.000 0.006
Mg 1.097 0.952 0.982 0.932 0.907 0.961 0.851
Ca 0.658 0.804 0.821 0.821 0.837 0.823 0.834
Na 0.007 0.013 0.014 0.012 0.101 0.012 0.012
Totals: 4.000 4.000 0.000 4.000 4.000 4.000 4.000
Composition (at%):
Ca 33.97 42.35 42.39 42.98 44.64 42.49 44.14
Mg 56.67 50.13 50.72 48.80 48.40 49.61 45.07
Fe 9.36 7.52 6.89 8.22 6.97 7.91 10.78
Mg# 85.83 86.95 88.05 85.58 87.42 86.25 80.69

Notes: Formulas calculated on the basis of 6 oxygens (software PYROX; Yavuz, 2001). Mg# = 100 x Mg2+/(Mg2+ + Fe2+ + Mn2+). Fe* = Fe3+ + Fe2+ + Mn2+. BDL = below detection limit, a.p.f.u. = atoms per formula unit, at% = atomic percentage.

Hole:
195-1201D-
Core, section,
piece, interval (cm):
48R-2 (Piece 18, 38-41)
49R-1 (Piece 14C, 145–147)
55R-1 (Piece 5R, 103–106)
Analysis label:
134-105-1
135-107-5
135-107-6
144-123-7
144-123-8
144-122-9
144-122-10
Description:
Altered microlite
Intergrown with plagioclase
Intergrown with plagioclase
Microlite, core
Microlite, rim
Microlite, core
Microlite, rim
Major element oxides (wt%):
SiO2 49.82 49.95 50.47 50.86 51.77 51.71 52.78
TiO2 1.69 0.66 1.00 0.95 0.72 0.66 0.55
Al2O3 4.76 5.07 6.71 4.20 3.13 2.66 2.32
Cr2O3 0.09 0.14 0.22 0.58 0.10 BDL BDL
FeO 9.02 10.12 8.30 6.34 7.86 12.01 9.90
MnO 0.06 0.31 0.17 0.20 0.18 0.46 0.24
MgO 13.72 16.66 16.70 15.74 16.48 17.37 17.35
CaO 21.03 17.16 17.90 21.53 19.75 15.98 18.05
Na2O 0.56 0.23 0.26 0.20 0.23 0.20 0.17
Totals: 100.75 100.31 101.72 100.61 100.22 101.05 101.36
Fe2O3 2.29 3.33 1.50 2.23 1.47 2.66 1.57
FeO 6.96 7.12 6.95 4.33 6.53 9.61 8.49
Totals: 100.98 100.64 101.87 100.84 100.37 101.32 101.52
Mineralogy (a.p.f.u.):
Si 1.838 1.834 1.819 1.860 1.900 1.895 1.920
AlIV 0.162 0.166 0.181 0.140 0.100 0.105 0.080
AlVI 0.045 0.054 0.104 0.041 0.035 0.010 0.019
Ti 0.047 0.018 0.027 0.026 0.020 0.018 0.015
Cr 0.003 0.004 0.006 0.017 0.003 0.000 0.000
Fe3+ 0.064 0.092 0.041 0.061 0.041 0.073 0.043
Fe2+ 0.215 0.219 0.209 0.133 0.201 0.295 0.258
Mn 0.002 0.010 0.005 0.006 0.005 0.014 0.007
Mg 0.755 0.912 0.897 0.858 0.902 0.949 0.941
Ca 0.831 0.675 0.691 0.844 0.777 0.627 0.704
Na 0.040 0.016 0.019 0.014 0.016 0.014 0.012
Totals: 4.000 4.000 4.000 4.000 4.000 4.000 4.000
Composition (at%):
Ca 44.55 35.39 37.48 44.36 40.34 32.03 36.02
Mg 40.44 47.80 48.67 45.12 46.85 48.45 48.17
Fe 15.01 16.80 13.85 10.52 12.81 19.52 15.80
Mg# 72.93 73.99 77.85 81.09 78.53 71.28 75.30