Table 7. Gas composition of samples from the PCS at Site 996.																	

Core	"Sample, analysis"	Split volume (mL)	C1 (ppmv)	C2 (ppmv)	C3 (ppmv)	i-C4 (ppmv)	n-C4 (ppmv)	i-C5 (ppmv)	n-C5 (ppmv)	i-C6 (ppmv)	n-C6 (ppmv)	n-C7 (ppmv)	C1/C2	C1/C2+	 N2 (vol%)	O2 (vol%)	CO2 (ppmv)

164-996A-																	
7P	G1-N	10	32300	6	0.3	0.4	 	 		0.3	 	0.8	5475	4195	0.1	0.2	1700
7P	G2-N	20	9900	4	0.2	0.4	 	 		0.2	 	2.2	2750	1500	1.1	3.6	1400
7P	G3-N	35	31300	14	0.4	1.5	0.4	0.1			 	 	2285	1944	18	4.5	1500
7P	G4-N	45	542500	322	8.2	6.5	1.7	1.3		0.1	 	2	1686	1588	14	3.2	700
7P	G5-N	175	1001600	644	13.6	5.4	1.2	3.1	0.4	0.4	 	1	1556	1498	0.8	0.3	200
7P	G6-N	90	864000	590	13.6	4.4	1	3		1.8	 	1.5	1464	1404	0.6	0.3	1300
7P	G7-N	100	921100	574	12.6	4.7	1.2	3.5			 	1.6	1604	1541	2	0.6	400
7P	G8-N	300	986000	678	13	4.9	1.2	3.7	0.1		 	1.4	1455	1404	0.1	0.1	200
7P	G9-N	265	1000400	664	13.8	4.8	1.4	4.2		0.4	 	1.5	1508	1451	0.1	0	300
7P	G10-N	180	997000	681	12.4	4.5	1.2	4.2		0.2	 	1.5	1465	1415	0.1	0	300
7P	G11-N	70	997000	681	12.4	4.5	1.2	4.2		0.2	 	1.5	1465	1415	0.1	0	300
7P	G12-N	100	996900	696	12.3	3.9	1.1	3.8		0.3	 	0.4	1432	1388	0.1	0	400
7P	G13-N	190	969900	655	14.2	4.4	1.3	4.9		0.3	0.2	0.7	1481	1425	0.7	0.3	500
7P	No sample	200															
7P	G14-N	155	787800	501	12.8	4.3	1.3	4.6		0.5	0.2	0.5	1572	1500	15	3.4	800
7P	G15-N	100	943700	594	14.9	5.6	1.7	6	1	0.4	0.2	0.2	1588	1511	1.9	0.5	800
7P	G16-N	490	948700	593	14.7	5.4	1.7	5.8	0.8	0.7	0.3	0.8	1599	1522	1.6	0.4	800
7P	G17-N	600	964800	592	14.3	 	1.5	4.9	0.7	0.3	0.2	0.9	1631	1570	0.2	0	600
7P	G18-N	410	1000200	583	14.3	 	1.7	5.1	0.8	0.3	0.2	0.9	1716	1650	1.1	0.2	600
7P	G19-G	520	852700	538	NA	NA	NA	NA	NA	NA	NA	NA	1586	1586	NA	NA	NA
7P	G19-N		972700	585	18.6	4.7	1.2	3.8	0.5	0.2	0.2	1	1663	1581	1.8	0.2	600
7P	G20-G	470	907800	587	NA	NA	NA	NA	NA	NA	NA	NA	1547	1547	NA	NA	NA
7P	G20-N		907800	610	12.9	4	1.2	3.9	0.7	0.2	0.2	 	1488	1434	1.3	0.2	600
7P	G21-G	185	762200	516	NA	NA	NA	NA	NA	NA	NA	NA	1477	1477	NA	NA	NA
7P	G21-N		987800	618	17.3	4	1.2	3.8	 	0.2	0.2	 	1598	1532	1.6	0.2	700
7P	G22-G	280	762400	521	NA	NA	NA	NA	NA	NA	NA	NA	1462	1462	NA	NA	NA
7P	G22-N		983500	625	15.5	 	1.3	3.7	 	0.3	0.2	1.6	1574	1519	2.1	0.2	500
7P	G23-G	40	863400	594	NA	NA	NA	NA	NA	NA	NA	NA	1454	1454	NA	NA	NA
7P	G23-N		989700	647	18	4.4	1.4	3.9	0.9	0.3	0.2	0.9	1530	1462	1.6	0.2	
7P	G24-G	335	809900	662	NA	NA	NA	NA	NA	NA	NA	NA	1223	1223	NA	NA	NA
7P	G24-N		932400	666	17	4.7	1.6	4.2	 	0.2	0.3	1.4	1400	1341	8.7	1.8	500
7P	G25-G	50	775200	635	NA	NA	NA	NA	NA	NA	NA	NA	1221	1221	NA	NA	NA
7P	G25-N		880600	673	19.3	5.3	1.6	4.6	0.8	0.2	0.2	 	1308	1249	12	2.5	1100

164-996D-																	
7P	G1-G	60	94000	82	NA	NA	NA	NA	NA	NA	NA	NA	1146	1146	NA	NA	NA
7P	G1-N		98600	80	1.4	0.3	0.2	1.5	0.1	 	 	 	1233	1182	5.8	1.6	400
7P	G2-G	70	677100	532	NA	NA	NA	NA	NA	NA	NA	NA	1273	1273	NA	NA	NA
7P	G2-N		755200	548	9.1	2	0.5	2.7	 	0.2	0.1	 	1378	1342	7.5	1.9	300
7P	G3-G	20	742700	538	NA	NA	NA	NA	NA	NA	NA	NA	1380	1380	NA	NA	NA
7P	G3-N		815800	556	11.4	1.7	0.3	4.9	0.3	0.1	 	 	1467	1420	6.2	1.4	700
7P	G4-N	40	738500	535	9.4	2.1	0.6	1.4		0.2	 	 	1382	1347	12	2.8	900
7P	G5-N	620	996800	814	12	3.4	0.7	3.4	0.6	0.2	 	 	1225	1195	0.1	0.1	600
7P	G6-N	825	1001300	830	13.4	5.8	1	4.2		0.6	0.3	 	1206	1171	0.1	0	500
7P	G7-N	215	956000	746	12.1	3.3	0.9	3.5	0.6	0.2		 	1282	1248	3.4	0.9	500
7P	G8-N	720	988900	651	13.2	3.4	1	3.7	0.6	0.2		 	1519	1469	1.4	0.2	100
7P	G9-N	1060	984400	624	12.3	3.5	0.8	3.2	0.6			 	1577	1527	1.5	0.1	
7P	G10-N	525	988900	676	11.4	3.4	0.9	3.3	0.5	0.2		 	1463	1421	1	0	100
7P	G11-N	525	990500	676	12.6	3.3	0.8	3	0.5	0.3		 	1465	1422	1.1	0	100
7P	G12-N	650	953500	651	11.9	3.1	0.7	2.9	0.4	0.3		 	1466	1424	1.5	0	100
7P	G13-N	440	968000	660	11.5	3	0.7	3.1	0.4			 	1467	1426	1.3	0	100
7P	G14-N	990	941400	714	12.6	3.3	0.8	3	0.6	0.2		 	1318	1281	2	0.2	200
7P	G15-N	550	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
7P	G16-N	200	946100	780	14.9	4.5	1	3.8	0.6	0.2		 	1213	1175	2.5	0.3	200
7P	G17-N	200	952700	823	14.7	4.2	1	4.2	0.6	0.1		 	1158	1124	3.1	0.5	200
7P	G18-N	100	972200	837	16.1	4.7	1.3	4.7	1	0.4	0.3	 	1162	1123	2.2	0.3	300
7P	G19-N	260	667500	648	12.7	3.5	0.9	3.5	0.6	0.2	0.1	0.6	1030	996	10	2.2	200
7P	G20-N	30	846300	815	22.3	5.5	1.4	5.8	0.8	0.2	0.1	0.4	1038	994	3	0.5	500

164-996E-																	
8P	G1-N	125	25700	29	0.7	0.5	0.3	6	0.1	 	 	0.2	888	699	2.4	0.8	100
8P	G2-N	450	840600	527	12.6	 	1.4	8	0.4	 	0.1	 	1595	1530	5.1	0.4	400

"Notes: Gas samples taken from the PCS are designated (e.g., G1) in the order in which they were collected (see Fig. 26, ""Downhole Tools and Sampling"" section, ""Site 995"" chapter, this volume). Letters following the sample number refer to the shipboard "																	
"analytical instrument used for gas analyses: G = GC3, and N = NGA (see  Organic Geochemistry  section,  Explanatory Notes  chapter, this volume). Split volume is the total volume of gas from which the sample was taken. NA = not analyzed."