(Table 1) Interstitial water chemistry at DSDP Leg 63 Holes

DOI

Interstitial water studies of drill sites off the California Continental Borderland (Sites 467, 468, 469) reveal that fresh water can penetrate through the sediments as far as the San Miguel Gap (Site 467). In the rapidly deposited sediments of Site 467, decreases in magnesium concentrations can be related to the formation of dolomite in the claystone unit of the sediment column. Decreases in magnesium and increases in calcium at Site 469 at the base of the Patton Escarpment are probably the result of alteration of volcanic matter in the sediments and/or the underlying basalts. Studies of the gradients of calcium, magnesium, potassium, strontium, and lithium at Site 471 indicate that a 150-meter-thick porcellanite-claystone-limestone complex acts as an almost complete barrier to diffusive exchange with the underlying sediments. Uptake reactions involving potassium and magnesium may still occur in the Porcellanite complex. At all sites, with the exception of Site 467, gradients of calcium show concentration increases with depth and simultaneous decreases in dissolved magnesium - a pattern commonly observed in open-ocean environments.

Sediment depth is given in mbsf. #0 = no data available; empty cells = not determined.

Supplement to: Gieskes, Joris M; Nevsky, Brad; Chain, Aileen (1981): Interstitial water studies, Leg 63. In: Yeats, RS; Haq, BU; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 63, 623-629

Identifier
DOI https://doi.org/10.1594/PANGAEA.819254
Related Identifier IsSupplementTo https://doi.org/10.2973/dsdp.proc.63.120.1981
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.819254
Provenance
Creator Gieskes, Joris M; Nevsky, Brad; Chain, Aileen
Publisher PANGAEA
Publication Year 1981
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 604 data points
Discipline Earth System Research
Spatial Coverage (-120.758W, 20.965S, -107.064E, 33.849N); North Pacific/GAP; North Pacific/ESCARPMENT; North Pacific/ABYSSAL FLOOR; North Pacific/FAN; North Pacific/PLATEAU; North Pacific/Gulf of California/CONT RISE
Temporal Coverage Begin 1978-10-10T00:00:00Z
Temporal Coverage End 1978-11-22T00:00:00Z