Comparison on Rare Gas Geochemical Characteristics and Gas Originations of Kuche and Southwestern Depressions in Tarim Basin, China

Table 2

Isotopic compositions for some hydrocarbon and rare gases in some gas fields from the Kuche and Southwestern Depressions, Tarim Basin.

Tectonic unit	Gas field	Strata	(‰)	(‰)	^3He/^4He (10^-8)		^20Ne/^22Ne	^21Ne/^22Ne	^40Ar/^36Ar	^38Ar/^36Ar	^129Xe/^130Xe	^132Xe/^130Xe	References
Kuche Depression	Kela2	E	-27.6	-18	3.93	0.028	9.70	0.0298	1211	0.195	6.301	6.663	[15]
		K1, E	-26.4	-17.8	4.31	0.031	9.65	0.0305	1323	0.196	6.433	6.706
		K1, E	-26.8	-18.4	6.77	0.048	9.74	0.0299	589	0.196	6.434	6.745
		K1, E	-28.1	-19.1	8.58	0.061	9.69	0.0307	719	0.198	6.418	6.628
		K1, E	-28	-18.7	5.68	0.041	9.63	0.0301	720	0.197	6.452	6.685
		K1, E	-27.8	-19	7.24	0.052	9.68	0.0302	462	0.195	6.399	6.715
		K1, E	-27.3	-18.5	3.75	0.027							This paper
		K1, E	-27.4	-18.3	4.12	0.029
	Dabei	K1bs	-30.9	-22.1	6.31	0.045	9.56	0.0291	858	0.201	6.446	6.689	[23]
		K1bs	-29.4	-19.4	8.73	0.062	9.60	0.0303	504	0.197	6.436	6.653
		K1bs	-30.4	-21.8	7.14	0.051	9.62	0.0307	521	0.204	6.422	6.638
		K1bs	-30.7	-22.3	8.68	0.062			390	0.196
		K1bs	-31.9	-24.2	11.24	0.08	9.73	0.0299	485	0.199
	Dina	E	-34.5	-21.3	3.33	0.024	9.50	0.0297	387	0.193	6.478	6.759	This paper
		E	-34.6	-22.4	3.56	0.025
		E	-33.3	-22.5	3.82	0.027
	Keshen	K1bs	-27.8	-16.1	6.87	0.049	9.68	0.0304	841	0.194	6.381	6.809
		K1bs	-27.7	-16.3	4.58	0.033	9.54	0.0306	456	0.191	6.422	6.704
		K1bs	-27.6	-17.3	6.07	0.043	9.64	0.0302	412	0.187	6.471	6.775
Southwestern Depression	Akemomu	K	-25.6	-21.9	83.10	0.596			1653	0.198	6.437	6.754
		K	-25.2	-21.8	83.60	0.597	9.71		1665	0.202	6.389	6.828
Air					140	1	9.8	0.029	295.5	0.188	6.496	6.607