To maximize the analytical resolution in identifying drilling mud 
components, sand and coarser material were removed from selected samples. 
Filtered distilled water was used to wash the silts and clays through a 60-ym 
nylon sieve. (A 63-ym sieve, used to separate sand from finer material in the 
standard textural analyis procedures, was unavailable in a _ non-metal 
material.) The resultant slurry was dried in a teflon-coated oven, then 
ground and analyzed by the same methods used for bulk sediments. Corrections 
were made for the weight of salt contributed by the interstitial water using 
the following relation between chlorinity (Cl) and salinity (S); 
S = 0.03 + 1.805 (C1) 
(Sverdrup and others, 1942). Chloride was measured in samples of the 
separated fine fraction using the method of Aruscavage and Campbell (1982). 
This technique utilizes a specific ion electrode that measures most of the 
bromide as chloride and thus estimates the total chlorinity of the sample. 
The ratio of measured chloride to the total precipitated sea salts used to 
make salt corrections was 0.5535. The algorithm for making corrections for 
each metal concentation is: 
Cc = U/ (1 - (C1/0.5535)) 
where C is the corrected metal concentration, U is the_ uncorrected 
concentration, and Cl is the measured chloride concentration in percent 
multiplied by 1072. 
The field numbers (for example, MO09-13-00-G and M10-05-28-BL) that 
identify samples in each data table have the following code. The first three 
characters indicate the cruise number; M09 stands for monitoring cruise 9. 
The station number appears after the first dash. In the examples given, 13-00 
is a station in the regional sample array; station 05-28 is one of the site- 
specific stations around regional station 5 (see fig. 1B). A single alpha 
