Total organic carbon, metal concentrations and metal and aluminium ratios in bulk sediment from the ODP sample 169-1033B-4H-4,54-74

Holocene laminated sediments in Saanich Inlet, British Columbia, are interrupted by frequent, non-laminated, massive layers. These layers may be debris flows released by earthquakes or bioturbated sediments deposited during periods of relatively high bottom water oxygen concentration and/or low surface productivity, or both. We determined the organic carbon content and the concentration of a suite of redox-sensitive metals in bulk sediments at approximately 1-cm resolution across a laminated-massive-laminated interval (ODP Leg 169S Sample 1033B-4H-4,54-74), to determine the redox conditions under which the massive layer was deposited. Our results indicate that this massive interval was deposited under anoxic bottom waters. Manganese/Al ratios are consistently low throughout the massive section, while Mo/Al, Cd/Al, Re/Al, and U/Al ratios are enriched relative to their metal/Al ratios in detrital material (represented by Cowichan River suspended sediments). The concentration of organic carbon in the lower portion of the massive layer is higher than in the upper portion, which has a concentration similar to that in the overlying and underlying laminated sediments. Well-defined peaks in Mo/Al, Cd/Al, and Re/Al and a broad peak in U/Al occur in the lower portion of the massive layer. The positions of the Cd/Al, Re/Al, and Mo/Al peaks, as well as the increase in organic carbon content with depth in the massive layer, are best explained by a process of diagenetic redistribution of metals that occurred after the massive layer was emplaced.

(Table 1) Major and trace elements analyses from FAMOUS-Project and DSDP Site 54-424

Hydrothermal deposits "sensu stricto" have been recovered during the FAMOUS cruise and Leg 54 of the Deep Sea Drilling Project near the Galapagos Spreading Centre. The studied sediments, mainly composed of clay material, have very poor REE concentrations, below about ten ppm. The shale-normalized patterns are characterized by a significant enrichment in heavy rare earths and show a negative Ce anomaly. The magnitude of this anomaly fluctuates but is generally lower than the seawater Ce anomaly. The geochemical characteristics of these hydrothermal deposits are in contrast with those of metalliferous sediments which are more enriched in trace elements, especially in REE.

Revised rules of the Supreme court of the United States : Adopted February 13, 1939. Effective February 27, 1939. (The Acts of February 13, 1925, c. 229, 43 Stat. 936, January 31, 1928, c. 14, 45 Stat. 54, April 26, 1928, c. 440, 45 Stat. 466, and August 24, 1937, c. 754, 50 Stat. 751, are printed in an appendix.).

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Revised rules of the Supreme court of the United States : Adopted June 5, 1928. Effective July 1, 1928. Amended June 1, 1931, and May 31, 1932. (The Acts of February 13, 1925, c.229, 43 Stat. 936, January 31, 1928, c. 14, 45 Stat. 54, and April 26, 1928, c. 440, 45 Stat. 466, are printed in an appendix.).

Act of February 13, 1925: An act to amend the Judicial code, and to further define the jurisdiction of the Circuit courts of appeals and of the Supreme court, and for other purposes; Act of January 31, 1928: An act in reference to writs of error; Act of April 26, 1928: An act to amend section 2 of an act entitled "An act in reference to writs of error" (12 pages at end) Eighty pages: "Amendments effective Sept. 1, 1932" inserted. (c.1).

Variable stars in Milton field 54,

Mode of access: Internet.

Lolita : caprice espagnol : op. 54 /

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