Table 20. Chemical analyses of unstored and stored samples showing the difference between measurements made at different times after core collection.																

"Core, section, interval (cm)"	Storage time (hr)	Cl- before (mM)	Cl- after (mM)	Cl- change (%)	K+ before (mM)	K+ after (mM)	K+ change (%)	Mg2+ before (mM)	Mg2+ after (mM)	Mg2+ change (%)	Ca2+ before (mM)	Ca2+ after (mM)	Ca2+ change (%)	Sr2+ before (uM)	Sr2+ after (uM)	Sr2+ change (%)

164-995A-																
"81X-5, 120-150"	68	515	523	1.6	13.12	16.24	23.7	14.21	9.36	-34.1	5.83	1.78	-69.5	148	109	-26.4

164-995B-																
"8X-2, 120-150            "	36	503	512	1.8	14.37	16.29	13.4	16.64	17.13	2.9	2.38	1.6	-32.6	82	76	-7.3
"11X-2, 120-150"	32	507	508	0.2	18.16	17.86	-1.6	10.99	8.78	-20.1	0.92	0.73	-20.8	47	35	-25.5
"15X-3, 120-150"	25	501	509	1.6										100	37	-63

Average change (%)				1.2			5.9			-8.6			-26.7			-31.9