Table 9. Chemistry of water samples from the PCS at Site 997.														

"Core, interval (cm)"	Depth (mbsf)	pH	Alk (mM)	Sal (g/kg)	Cl- (mM)	Cl-* (mM)	Mg2+ (mM)	Ca2+ (mM)	SO42- (mM)	PO43- (mu M)	NH4+ (mu M)	H4SiO4 (mu M)	K+ (mM)	 Sr2+ (mu M)

164-997A-														
"18P, 25-39"	147.15	7.6	71.4	33.5	527	518	22.7	2.5	4.2	167	13030	109	14.2	75
"25P, 8-28"	202.48			34	531	497	28.5	4.2	12.3	58	10630	653	14.1	81
"25P, 64-74"	203.04	7.97	52.9	34	535	503	27.7	3.3	12.4	82	11120	608	15.1	73
"55P, 10-34"	433.4	7.51	72.7	31.5	476	444	17.1	2.5	7.1		17470		14.9	68

164-997B-														
"10P, 0-5"	462.2			35	527	514	16.9	2.8	5.9	24	21780	834	15.6	89

"Notes: Alk = alkalinity, and Sal = salinity. * = values have been corrected for seawater contamination (see  Inorganic Geochemistry  section,  Site 994  chapter, this volume)."