Sulfur geochemistry at ODP Site 112-680 and 112-686

We have measured the concentrations of (1) pore-water sulfide and (2) solid-phase pyrite, iron monosulfide (=acid volatile sulfide), elemental sulfur, and extractable and nonextractable organic ("kerogen") sulfur in sediments from Ocean Drilling Program (ODP) Sites 680 and 686. Pore-water sulfide defines classic "bell-shaped" profiles. Maximum concentrations of 6 to 12 mM occur where sulfate is exhausted, or is most depleted, at depths between 15 and 50 mbsf. Sulfide resulting from bacterial sulfate reduction reacts in three ways: (1) some is reoxidized to elemental sulfur in surface sediments; (2) some reacts with detrital iron minerals to form iron monosulfide and pyrite, primarily in the top meter or two of the sediment; and (3) some reacts with, and is incorporated into, kerogen. Incorporation of reduced sulfur into kerogen occurs over the top 15 m of the sediment at both Sites 680 and 686, after the main phase of pyrite formation. Up to 45% of the total sedimentary sulfur is organically bound, and concentrations of 12 wt% sulfur are reached in the kerogen. These values are like those measured in lithologically similar, but more deeply buried, sediments from the Monterey Formation.

Quatuor pour 2 violons, alto et violoncelle. Op. 112.

Mode of access: Internet.

Schottische Bilder, Op. 112 : componirt für Clarinette und Pianoforte oder Violoncello und Piano ... /

Photocopy with label on title page: availables from J. Boonin, Inc., Music Publications, Hachensack, N.J.

The Department of Defense's inquiry into Project 112/Shipboard Hazard and Defense (SHAD) tests : hearing before the Subcommittee on Personnel of the Committee on Armed Services, United States Senate, One Hundred Seventh Congress, second session, October 10, 2002.

Errata: S.Hrg. 107-861 "was inadvertently printed with the incorrect designation of S.Hrg. 107-810."