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Table T3. Semiquantitative EDS analyses. (See table notes.)

Depth
(mbsf)
Particle S
(at%)
Ti
(at%)
Fe
(at%)
Fe/S
ratio
Fe/Ti
ratio
Identified mineral phase(s) TH
calculated
2Ti/(Ti + Fe)
TM
calculated
3Ti/(Ti + Fe)
14.35 1 10.47 0.00 9.14 0.87 Greigite
14.35 2 6.91 0.00 6.27 0.91 Greigite
14.35 3 8.15 0.00 6.82 0.84 Greigite
14.35 4 0.00 1.50 6.03 4.02 Titanomagnetite TM60
14.35 5 0.00 4.04 4.42 1.09 Titanohematite TH96
14.35 6 0.00 6.57 5.47 0.83 Pseudobrookite/rutile
14.35 7 0.00 0.00 9.14 Magnetite TM0
14.35 8 0.00 1.42 18.83 13.45 Titanomagnetite TM21
14.35 9 0.00 8.95 14.70 1.64 Titanohematite TH76
14.35 10 0.00 0.00 28.75 Magnetite TM0
23.84 11 1.89 0.47 9.90 5.24 21.06 Mixed phase (titanomagnetite + sulfide) TM14
23.84 12 5.67 0.00 3.43 0.60 Pyrite
23.84 13 15.44 0.49 10.24 0.66 20.90 Mixed phase (pyrite + titanomagnetite) TM14
23.84 14 0.00 4.84 8.01 1.65 Titanohematite TH75
23.84 15 0.00 0.00 15.98 Magnetite TM0
23.84 16 1.96 0.65 11.87 6.06 18.26 Mixed phase (titanomagnetite + sulfide) TM16
23.84 17 0.00 3.05 19.81 6.50 Titanomagnetite TM40
23.84 18 0.00 0.00 20.14 Magnetite TM0
23.84 19* 0.00 1.94 13.25 6.83 Titanomagnetite TM38
23.84 20* 0.00 0.00 16.86 Magnetite TM0
23.84 21* 4.80 0.00 3.74 0.78 Greigite
23.84 22* 5.37 0.00 4.04 0.75 Greigite
23.84 23* 5.77 0.00 4.61 0.80 Greigite

Notes: Results give the elemental composition of the individual particles from the Site U1319 magnetic extracts of 14.4 and 23.8 mbsf. Particle numbers refer to numbers given in Figure F8. * = particle not shown in Figure F8. Titanohematite (TH) and titanomagnetite (TM) compositions calculated according to the stoichiometric formulas Fe2–yTiyO3 and Fe3–xTixO4, respectively. — = not applicable.

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