Geochemistry of tetrapyrrole, carotenoid, and perylene pigments in sediments at DSDP Holes 63-467 and 63-471

Autoria(s): Louda, William; Baker, Earl W
Cobertura

MEDIAN LATITUDE: 29.961762 * MEDIAN LONGITUDE: -117.659738 * SOUTH-BOUND LATITUDE: 23.482200 * WEST-BOUND LONGITUDE: -120.757800 * NORTH-BOUND LATITUDE: 33.849500 * EAST-BOUND LONGITUDE: -112.496300 * DATE/TIME START: 1978-10-10T00:00:00 * DATE/TIME END: 1978-11-08T00:00:00
Data(s)

16/09/1981
Resumo

Twenty-one core samples from DSDP/IPOD Leg 63 were analyzed for products of chlorophyll diagenesis. In addition to the tetrapyrrole pigments, perylene and carotenoid pigments were isolated and identified. The 16 core samples from the San Miguel Gap site (467) and the five from the Baja California borderland location (471) afforded the unique opportunity of examining tetrapyrrole diagenesis in clay-rich marine sediments that are very high in total organic matter. The chelation reaction, whereby free-base porphyrins give rise to metalloporphyrins (viz., nickel), is well documented within the downhole sequence of sediments from the San Miguel Gap (Site 467). Recognition of unique arrays of highly dealkylated copper and nickel ETIO-porphyrins, exhibiting nearly identical carbonnumber homologies (viz., C-23 to C-30; mode = C-26), enabled subtraction of this component (thought to be derived from an allochthonous source) and thus permitted description of the actual in situ diagenesis of autochthonous chlorophyll derivatives.
Formato

application/zip, 4 datasets
Identificador

https://doi.pangaea.de/10.1594/PANGAEA.819337

doi:10.1594/PANGAEA.819337
Idioma(s)

en
Publicador

PANGAEA
Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted
Fonte

Supplement to: Louda, William; Baker, Earl W (1981): Geochemistry of tetrapyrrole, carotenoid, and perylene pigments in sediments from the San Miguel Gap (Site 467) and Baja California Borderland (Site 471), Deep Sea Drilling Project Leg 63. In: Yeats, RS; Haq, BU; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 63, 785-818, doi:10.2973/dsdp.proc.63.133.1981
Palavras-Chave ## = refers to extrapolation from two adjacent samples; DSDP grain size - Carbon/carbonate Lab, Scripps Institute of Oceanography, La Jolla, California; 63-467; 63-471; 641-643; Determined using alpha = 63.71 g**-1 cm**-1 for pheophytin-a, in ethyl ether solvent; Acid; As 1, using Sum-mM = 34.82 at 550 nm, with molecular weight of 576 amu for C-32 Ni-deoxophylloerythrin; As 1, using Sum-aM = 26.14 at 570 nm, with molecular weight of 541 amu for C-32 V = O-DPEP; As 1, using Sum-mM = 34.82 at 550-557 nm, with molecular weight of 532 amu for C-32 Ni-DPEP.; As 1, using Sum-mM = 6.54 at 619 nm, with molecular weight of 476 amu for C-32 DPEP; C23 carbon number; C23 C n; C24 carbon number; C24 C n; C25 carbon number; C25 C n; C26 carbon number; C26 C n; C27 carbon number; C27 C n; C28 carbon number; C28 C n; C29 carbon number; C29 C n; C30 carbon number; C30 C n; C31 carbon number; C31 C n; C32 carbon number; C32 C n; C33 carbon number; C33 C n; C34 carbon number; C34 C n; Calculated; Carbon, organic, total; Chlorins; Comment; Co-Ni porphyrins; Copper-Nickel porphyrins; Dealkylated ETIO; As 1, using Sum-mM = 34.82 at 550-557 nm, with molecular weight of 532 amu for C-32 Ni-DPEP.; Deep Sea Drilling Project; Depth; DEPTH, sediment/rock; Determined by drying at 106°C for 18-24 hrs. and repeated to constant dry weight; DPEP/ETIO; DPEP/ETIO: Ratio of ion intensities of each series; DRILL; Drilling/drill rig; Dry tetrapyrrole yield intex; Defined as tetrapyrrole yield in µg/g sediment, dry weight divided by % organic carbon, dry weight (cf., Baker and Louda, 1980); Dry weight. Calculated by summing yields after initial Sephadex LH-20 and Silica Gel chromatographic separations. Amounts determined via electronic spectroscopy in ethyl ether solvent. Chlorins, alpha = 63.7 at 667 nm for pheophytin-a; free-base porphyrins Sum-mM = 6.54 at 619 nm for deoxophylloerythrin; nickel and copper porphyrins, Sum-mM = 34.82 at 550 nm for NiDPEP; vanadyl porphyrins, Sum-mM = 26.14 at 571 nm for V = O DPEP; DSDP; Electronic absorption spectroscopy; Epoch; Event; Free-base porphyrins; From site report; Glomar Challenger; ID; Identification; Index; Label; Leg63; Lithology; Lithology/composition/facies; m/z; Mass of molecular formulas; Mass-to-charge ratio; mbsf; Metalloseries; Nickel-Porphyrins; Ni-Porphyrins; No; North Pacific/FAN; North Pacific/GAP; Number; Number of scans employed in reconstitution of normalized average spectrum covering entire volatility range throughout which porphyrin molecular ions were observed; ODP sample designation; Operation mode; Op mode; Phorbides; Determined using alpha = 63.71 g**-1 cm**-1 for pheophytin-a, in ethyl ether solvent; Phyllo-acid; As 1, using Sum-mM = 34.82 at 583 nm, with molecular weight of 590 amu for C-32 Ni-phylloerythrin; Ratio; Refers to number of spectra employed in averaging processes; Sample code/label; see reference(s); Seires mode; Series; Tetrapyrroles; TOC; Total weighted average mass, including both DPEP and ETIO series; Vanadyl porphyrins; Van porhyrins; Water content of wet mass; Water wm; Weighted average mass of a specific porphyrin; Weighted average mass of the entire metalloporphyrin array for the sample indicated; Wet weight. Calculated by summing yields after initial Sephadex LH-20 and Silica Gel chromatographic separations. Amounts determined via electronic spectroscopy in ethyl ether solvent. Chlorins, alpha = 63.7 at 667 nm for pheophytin-a; free-base porphyrins Sum-mM = 6.54 at 619 nm for deoxophylloerythrin; nickel and copper porphyrins, Sum-mM = 34.82 at 550 nm for NiDPEP; vanadyl porphyrins, Sum-mM = 26.14 at 571 nm for V = O DPEP
Tipo

Dataset
Acesso ao item digital