Chemistry of interstitial waters and sediments in the Norwegian-Greenland Sea, Deep Sea Drilling Project Leg 38

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doi: 10.1016/0009-2541(87)90081-7
Author(s): Gieskes, Joris M.; Lawrence, J. R.; Perry, E. A.; Grady, S. J.; Elderfield, H.
Author Affiliation(s): Primary:
Scripps Inst. Oceanogr., La Jolla, CA, United States
Univ. Houston, United States
Univ. Mass., United States
Univ. Cambridge, United Kingdom
Volume Title: Chemical Geology
Source: Chemical Geology, 63(1-2), p.143-155. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0009-2541 CODEN: CHGEAD
Note: In English. 35 refs.; illus. incl. 5 tables, sketch map
Summary: Interstitial waters of several sites drilled during DSDP Leg 38 revealed substantial changes in dissolved constituents and in the 18O/16O composition of interstitial waters. Studies of the chemical composition of the bulk sediments and their <1 mu m fraction indicate the presence of large amounts of volcanic ash, especially in sites close to Iceland. The presence of authigenic clay minerals (illite/smectite) suggests that alteration of this volcanic ash is an important process. A study of Site 348 shows that dissolved Ca gradients are caused mainly by transport from the underlying basalts, but that decreases in Mg and delta 18O (H2O) are largely due to reactions involving alteration of volcanic ash in the sediments. Studies of 87Sr/86Sr distributions of dissolved Sr confirm this process in sites with high contents of volcanic matter, but in sites where the chemical composition of dissolved constituents has been little influenced by alteration reactions, 87Sr/86Sr ratios reveal complete diffusive exchange with present-day sea-water.
Year of Publication: 1987
Research Program: DSDP Deep Sea Drilling Project
Key Words: 02 Geochemistry; Alkaline earth metals; Arctic Ocean; DSDP Site 336; DSDP Site 343; DSDP Site 344; DSDP Site 345; DSDP Site 348; Deep Sea Drilling Project; Geochemistry; Greenland Sea; Isotopes; Leg 38; Metals; Norwegian Sea; O-18/O-16; Oxygen; Pore water; Ratios; Sea water; Sediments; Solutes; Sr-87/Sr-86; Stable isotopes; Strontium
Coordinates: N632103 N632104 W0074716 W0074717
N684254 N684255 E0054544 E0054543
N760858 N760859 E0075232 E0075231
N695013 N695014 W0011415 W0011416
N683010 N683011 W0122743 W0122744
Record ID: 1987079115
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom