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Volumn 303, Issue 5666, 2004, Pages 2004-2007

Oxygen Isotope Constraints on the Sulfur Cycle over the Past 10 Million Years

Author keywords

[No Author keywords available]

Indexed keywords

MATHEMATICAL MODELS; OXYGEN; PYRITES; SEA LEVEL; SULFUR COMPOUNDS; WEATHERING;

EID: 1642263726     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1092296     Document Type: Article
Times cited : (120)

References (36)
  • 2
    • 0002964308 scopus 로고    scopus 로고
    • H. D. Schulz, M. Zabel, Eds. (Springer-Verlag, Berlin)
    • S. Kasten, B. B. Jørgensen, in Marine Geochemistry, H. D. Schulz, M. Zabel, Eds. (Springer-Verlag, Berlin, 2000), pp. 263-275.
    • (2000) Marine Geochemistry , pp. 263-275
    • Kasten, S.1    Jørgensen, B.B.2
  • 31
    • 1642378479 scopus 로고    scopus 로고
    • note
    • Sediment was digested in 1 M acetic acid (pH ≈ 3) to dissolve the carbonate. The remaining sediment was repeatedly rinsed with distilled water, dried, manually ground to powder, and sieved to 200 μm. We suspended the powder in a 2.85 g/cc lithium poly-tungstate solution to separate barite from clays. All higher density material was extracted and rinsed with distilled water. Residual organic matter was oxidized in sodium hypochlorite warmed to 50°C and acidified with HCl. We washed the residue in 0.02 M hydroxylamine hydrochloride in 10 volume percent acetic acid to clear the barite of transition metal oxyhydroxides. All samples were measured for purity on an x-ray diffractometer (XRD), and samples that had nonbarite XRD lines were further purified or reextracted. All samples run for oxygen isotope analysis were assumed to be 97% pure. Oxygen isotopes were measured through pyrolysis in a Thermal Combustion Element Analyzer coupled to a Delta Plus mass spectrometer, then corrected to Vienna Standard Mean Ocean Water (VSMOW). NB5127 (NBS) barite was measured at 9.73 ± 0.42‰, indicating the measurement technique was sufficiently accurate and precise. Two separate barite standards were run with all samples for internal verification and drift correction. All samples were corrected to an NBS barite value of 9.3‰.
  • 33
    • 1642326418 scopus 로고    scopus 로고
    • note
    • 18O in benthic foraminifera curve from (30). Sea level change between today and the last glacial maximum was assumed to be 130 m.
  • 36
    • 1642324812 scopus 로고    scopus 로고
    • note
    • We thank L. Derry and one anonymous reviewer for suggestions that greatly improved this manuscript. Supported by a Department of Defense American Society for Engineering Education Graduate Fellowship (A.V.T.) and NSF grant no. OCE-0096909 (D.P.S).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.