Geofluids

Research Article

Geochronology and Geochemistry of the Karadaban Bimodal Volcanic Rocks in the Altyn Area, Xinjiang: Implications for the Tectonic Evolution of the Altyn Ocean

Table 2

LA-ICP-MS zircon U-Pb dating data for Karadaban rhyolite (KB-26, KB-81) from the northern Altyn Tagh region.


Spot no.	Isotopic ratios						Ages (Ma)						Pb (ppm)	Th (ppm)	U (ppm)	Th/U
	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U
	Ratios	1σ	Ratios	1σ	Ratios	1σ	Age	1σ	Age	1σ	Age	1σ

KB-26-1	0.05943	0.00173	0.66147	0.01805	0.08121	0.00092	583.4	69.43	515.5	11.03	503.4	5.50	179.22	370.82	399.64	0.93
KB-26-2	0.05904	0.00197	0.66388	0.02115	0.08200	0.00102	568.6	72.21	517.0	12.91	508.0	6.07	123.32	251.45	301.98	0.83
KB-26-3	0.06160	0.00230	0.69672	0.02517	0.08246	0.00106	661.1	74.99	536.8	15.06	510.8	6.29	99.43	236.65	248.95	0.95
KB-26-4	0.06051	0.00196	0.67705	0.02272	0.08114	0.00115	620.4	74.99	525.0	13.76	502.9	6.83	154.70	317.22	392.62	0.81
KB-26-5	0.06212	0.00171	0.71062	0.02002	0.08284	0.00080	679.6	63.88	545.1	11.88	513.0	4.77	166.46	348.84	435.81	0.80
KB-26-6	0.05778	0.00277	0.64371	0.02960	0.08131	0.00153	520.4	110.17	504.6	18.29	503.9	9.13	119.30	233.79	362.94	0.64
KB-26-7	0.06759	0.00998	0.74943	0.09941	0.08220	0.00236	857.4	313.87	567.9	57.76	509.3	14.03	72.24	126.11	209.43	0.60
KB-26-8	0.06709	0.00357	0.75325	0.04424	0.08096	0.00171	840.4	111.88	570.1	25.63	501.8	10.17	152.07	321.51	385.92	0.83
KB-26-9	0.06001	0.00196	0.68555	0.02180	0.08313	0.00096	605.6	70.36	530.1	13.13	514.8	5.72	138.37	270.60	366.74	0.74
KB-26-10	0.06166	0.00188	0.71332	0.02235	0.08387	0.00096	661.1	66.66	546.7	13.24	519.2	5.69	155.19	331.54	381.97	0.87
KB-26-11	0.06045	0.00200	0.69004	0.02203	0.08306	0.00076	620.4	76.84	532.8	13.24	514.4	4.53	185.01	370.24	446.68	0.83
KB-26-12	0.06368	0.00253	0.71492	0.02687	0.08180	0.00084	731.5	78.70	547.7	15.91	506.9	5.01	138.00	285.23	355.98	0.80
KB-26-13	0.05910	0.00198	0.68358	0.02316	0.08365	0.00076	572.3	74.06	528.9	13.97	517.8	4.54	158.96	331.23	379.46	0.87
KB-26-14	0.05821	0.00232	0.66206	0.02606	0.08279	0.00095	538.9	88.88	515.9	15.92	512.8	5.68	113.33	243.40	306.63	0.79
KB-26-16	0.05920	0.00201	0.70101	0.02393	0.08602	0.00125	576.0	78.69	539.4	14.28	531.9	7.40	190.04	361.89	432.30	0.84
KB-26-17	0.05913	0.00270	0.67400	0.03558	0.08217	0.00146	572.3	127.76	523.1	21.58	509.1	8.70	165.05	378.47	221.56	1.71
KB-26-18	0.05868	0.00262	0.67151	0.03046	0.08362	0.00180	553.7	98.13	521.6	18.50	517.7	10.72	198.49	415.08	424.27	0.98
KB-26-19	0.05990	0.00199	0.68925	0.02301	0.08357	0.00121	611.1	72.21	532.4	13.83	517.4	7.17	173.72	337.42	377.19	0.89
KB-26-20	0.05808	0.00174	0.64937	0.02015	0.08131	0.00126	531.5	66.66	508.1	12.40	504.0	7.51	318.15	645.51	558.34	1.16
KB-26-21	0.05859	0.00189	0.68120	0.02204	0.08464	0.00116	553.7	70.36	527.5	13.31	523.8	6.92	195.70	338.88	417.41	0.81
KB-26-22	0.05928	0.00358	0.68206	0.03900	0.08349	0.00326	576.0	132.23	528.0	23.55	516.9	19.38	159.41	200.48	402.64	0.50
KB-26-23	0.06142	0.00196	0.68436	0.01974	0.08144	0.00093	653.7	68.51	529.4	11.90	504.7	5.52	193.52	293.47	459.68	0.64
KB-26-24	0.06116	0.00484	0.67772	0.04259	0.08179	0.00295	655.6	170.35	525.4	25.78	506.8	17.56	165.11	212.71	383.31	0.55
KB-81-1	0.06004	0.00213	0.66399	0.02230	0.08091	0.00107	605.6	75.91	517.1	13.61	501.6	6.39	26.49	187.64	330.97	0.57
KB-81-2	0.05821	0.00203	0.65346	0.02105	0.08228	0.00114	538.9	77.77	510.6	12.93	509.7	6.77	40.88	352.60	490.77	0.72
KB-81-3	0.06149	0.00381	0.68379	0.03845	0.08167	0.00213	657.4	133.32	529.1	23.19	506.1	12.70	27.98	190.92	345.59	0.55
KB-81-4	0.06088	0.00233	0.68519	0.02497	0.08238	0.00118	635.2	83.32	529.9	15.05	510.3	7.03	35.97	246.22	435.34	0.57
KB-81-5	0.05833	0.00143	0.66421	0.01685	0.08261	0.00082	542.6	53.70	517.2	10.28	511.7	4.88	48.21	329.28	585.66	0.56
KB-81-6	0.06265	0.00597	0.71734	0.07026	0.08308	0.00219	696.0	203.68	549.1	41.56	514.5	13.03	36.85	394.07	406.53	0.97
KB-81-7	0.06094	0.00240	0.69022	0.02642	0.08248	0.00106	636.7	85.17	532.9	15.87	510.9	6.34	27.12	218.68	320.83	0.68
KB-81-8	0.05847	0.00244	0.65658	0.02750	0.08163	0.00098	546.3	90.73	512.5	16.86	505.8	5.85	21.62	130.54	270.59	0.48
KB-81-9	0.05860	0.00201	0.66130	0.02126	0.08232	0.00093	553.7	78.69	515.4	12.99	509.9	5.51	47.42	382.00	561.75	0.68
KB-81-10	0.05723	0.00204	0.65293	0.02387	0.08296	0.00129	501.9	77.77	510.3	14.67	513.7	7.66	41.15	295.92	494.37	0.60
KB-81-11	0.05881	0.00225	0.65222	0.02397	0.08123	0.00140	561.1	83.32	509.8	14.73	503.4	8.37	39.12	298.38	478.59	0.62
KB-81-12	0.06282	0.00263	0.70654	0.02906	0.08236	0.00136	701.9	89.65	542.7	17.29	510.2	8.12	30.47	185.74	375.81	0.49
KB-81-13	0.05858	0.00304	0.66136	0.03487	0.08226	0.00154	550.0	112.95	515.4	21.32	509.6	9.14	34.35	204.96	421.38	0.49
KB-81-14	0.05774	0.00222	0.65190	0.02464	0.08241	0.00126	520.4	87.95	509.6	15.15	510.5	7.53	43.03	280.42	531.47	0.53
KB-81-15	0.06107	0.00232	0.68192	0.02667	0.08146	0.00133	642.6	76.84	527.9	16.10	504.8	7.91	39.98	273.58	493.02	0.55
KB-81-16	0.06055	0.00176	0.69754	0.02070	0.08384	0.00119	633.4	61.10	537.3	12.38	519.0	7.07	84.00	430.41	1047.75	0.41
KB-81-17	0.05988	0.00341	0.67154	0.03465	0.08291	0.00142	598.2	122.21	521.6	21.05	513.5	8.43	18.15	95.22	225.51	0.42
KB-81-18	0.06111	0.00288	0.70427	0.03351	0.08431	0.00127	642.6	101.84	541.3	19.97	521.8	7.56	27.92	147.84	342.84	0.43
KB-81-19	0.05864	0.00216	0.67410	0.02493	0.08355	0.00124	553.7	79.62	523.2	15.12	517.3	7.38	77.50	604.90	919.21	0.66
KB-81-20	0.05860	0.00236	0.67375	0.03269	0.08375	0.00275	553.7	88.88	523.0	19.84	518.5	16.36	74.02	694.08	839.68	0.83
KB-81-21	0.06190	0.00196	0.73603	0.02451	0.08623	0.00126	672.2	62.80	560.1	14.34	533.2	7.48	49.82	345.96	562.44	0.62
KB-81-22	0.06049	0.00282	0.70626	0.03306	0.08539	0.00125	620.4	101.84	542.5	19.67	528.2	7.44	23.17	103.25	282.14	0.37
KB-81-23	0.05967	0.00188	0.67760	0.01948	0.08299	0.00103	590.8	68.51	525.3	11.79	514.0	6.11	54.79	360.50	643.54	0.56
KB-81-24	0.05925	0.00185	0.68230	0.02168	0.08385	0.00130	576.0	68.51	528.2	13.09	519.1	7.72	48.62	343.90	562.80	0.61
KB-81-25	0.05836	0.00160	0.65881	0.01870	0.08181	0.00099	542.6	63.88	513.9	11.45	506.9	5.90	55.56	436.41	655.44	0.67
KB-81-26	0.05794	0.00136	0.65695	0.01507	0.08249	0.00107	527.8	56.47	512.7	9.24	511.0	6.37	98.72	850.43	1118.25	0.76