Publication Date:
2024-05-22
Description:
Interstitial water samples from Leg 86 were analyzed for Cl-, SO42-, Ca2+, Mg2+, K+ , Li+ , Sr2+, Mn2+, Si, NO3-, NH4+ , and d18O. The principal findings are as follows. (1) The chloride profiles consistently show a about 1.5% downcore increase to about 40 m sub-bottom depth. This increase is consistent with model profiles generated by considering the effects of variations in seawater salinity resulting from Pleistocene glaciation on pore-water composition. d18O profiles support this model. This agreement of model and observation precludes advection of the pore fluids at rates greater than 1 mm/yr. (2) Ca2+ and Mg2+ gradients are small relative to other Deep Sea Drilling Project sites, likely resulting from low diffusive fluxes through underlying chert horizons. (3) Other constituents exhibit profiles consistent with previous observations.
Keywords:
86-576; 86-577; 86-577A; 86-578; 86-579; 86-579A; 86-580; 86-581; Ammonium; Atomic absorption spectrometry (AAS); Calcium; Chloride; Colorimetry; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Latitude of event; Leg86; Lithium; Longitude of event; Magnesium; Manganese 2+; Mass spectrometry; Nitrate; North Pacific; Potassium; Sample code/label; Silicon; Strontium; Sulfate; Titration; δ18O
Type:
Dataset
Format:
text/tab-separated-values, 389 data points
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