The Petrogenesis of the Permian Podong Ultramafic Intrusion in the Tarim Craton, Western China: Constraints from C-He-Ne-Ar Isotopes

Table 2

He, Ne, and Ar abundances and isotopic compositions of the magmatic mineral separates in the Podong mafic-ultramafic intrusion, western China.

No.	Rock	Mineral	Contents (10^−6 cm3·STP/g)			^3He/^4He		^20Ne/^22Ne		^21Ne/^22Ne		^40Ar/^36Ar
			^4He	^20Ne	^40Ar	(Ra)	1σ	R	1σ	R	1σ	R	1σ
PD73-1	Pl lherzolite	Pyx	9.49	0.54	41.96	1.16	0.09	9.75	0.23	0.034	0.013	293.05	1.60
PD73-2	Olv gabbro	Olv	33.04	9.55	359.12	0.62	0.03	9.65	0.01	0.029	0.001	297.86	0.50
PD73-4	Gabbro	Pl	27.04	11.50	11.48	1.02	0.04	9.68	0.01	0.029	0.001	126.48	0.52
PD73-5	Gabbro	Pyx	25.06	18.95	682.78	0.90	0.05	9.59	0.21	0.028	0.001	297.19	0.43
PD73-6	Gabbro	Pyx	45.76	3.43	4.15	0.72	0.02	9.75	0.01	0.029	0.002	177.03	7.30
PD73-7	Gabbro	Pyx	29.05	4.60	96.68	1.24	0.03	9.49	0.32	0.028	0.001	295.19	0.78
PD93-1	Pl lherzolite	Pyx	19.75	0.19	22.34	0.41	0.04			0.031	0.001	395.2	1.10
PD93-2	Pl lherzolite	Pyx	3.94	0.17	15.25	1.25	0.15	10.66	0.49	0.032	0.001	398.11	1.50
PD93-3	Gabbro	Pyx	51.81	33.60	68.55	1.10	0.03	9.81	0.01	0.029	0.002	291.92	1.50
PD93-4	Olv gabbro	Olv	41.72	21.26	744.56	1.03	0.04	9.70	0.01	0.029	0.003	294.92	0.40
PD93-7	Olv gabbro	Pyx	50.24	14.40	490.15	1.01	0.04	9.81	0.01	0.028	0.001	301.11	0.52
PD93-6	Gabbro	Pyx	35.07	11.92	451.08	0.84	0.04	9.68	0.01	0.030	0.001	296.23	0.51
PD93-8	Gabbro	Pyx	41.69	1.17	154.42	0.90	0.03			0.023	0.004	296.15	0.73
PD93-9	Gabbro	Pyx	27.83	4.83	185.88	0.98	0.03	9.31	0.51	0.028	0.001	304.69	0.71
PD113-1	Pyroxenite	Pyx	32.70	0.23	18.24	0.29	0.02			0.031	0.001	285.29	9.69