Discovery of the Silurian andesitic porphyry in the Xiaohulishan Mo-polymetallic deposit, the Beishan district, Inner Mongolia, and its geological significance

doi:10.13745/j.esf.sf.2020.4.25

Abstract

Abstract:

The Xiaohulishan Mo polymetallic deposit is located in the northeastern part of the Beishan district, Inner Mongolia, in which the Ordovician Xianshuihu Formation volcanic rocks occur. In this study, the authors discovered andesitic porphyry intruding into the andesite as stocks during the ore-bearing volcanic rock section observation. The zircon LA-ICP-MS U-Pb dating result of the andesitic porphyry is 419±5 Ma, corresponding to Late Silurian epoch and much younger than the Ordovician andesite 489±11 Ma. The dating results rectify the viewpoint that there are only Ordovician volcanic rocks distributing in the Xiaohulishan deposit. The geochemical characteristics of the Silurian andesitic porphyry in the Xiaohulishan deposit show that the SiO₂ contents are between 57.18% and 58.19%, the K₂O+Na₂O contents are between 5.78% and 6.97%, and the TiO₂ contents are between 0.57% and 0.90%, which indicate the andesitic porphyry is K-Al-rich, Na-poor rocks, and obviously different from the Ordovician low calc-alkaline andesite. The Silurian andesitic porphyry exhibits enriched in LILE (e.g. Rb, Ba, U, K, and Sr), but depleted HFSE (e.g. Nb, Ta, and Ti). The ∑REE concentrations of the andesitic porphyry are from 71.9×10^-6 to 72.24×10^-6, which is lower than andesite (96.89×10^-6). The LREE/HREE ratio of Silurian andesitic porphyry is from 4.68 to 5.91, showing a weak right-leaning trend with weak negative Eu anomalies, which probably experienced lower degree differentiation than andesite. The Silurian andesitic porphyry in the Xiaohulishan deposit is derived from crust-mantle mixing zone, and underwent weak differentiation and contamination during its emplacement. Based on regional geological setting, geochronology, and geochemical characteristics, it is showed that the Beishan district, Inner Mongolia underwent same geological evolution during the Early Paleozoic era, which probably consistently belongs to the island-arc accretion zone between the Siberia and the Tarim plates.

Key words: LA-ICP-MS U-Pb dating, geochemistry, tectonic setting, Xiaohulishan Mo deposit, Beishan district,Inner Mongolia

CLC Number:

ZHANG Dayu, FU Xiang, WEI Ouxiang, YE Longxiang, JIANG Hua, ZHANG Yong, XIN Houtian. Discovery of the Silurian andesitic porphyry in the Xiaohulishan Mo-polymetallic deposit, the Beishan district, Inner Mongolia, and its geological significance[J]. Earth Science Frontiers, 2020, 27(3): 222-238.

Figures/Tables 12

Fig.1 Geological sketch map of the Beishan district, Inner Mongolia (a) (modified after [31]) and geological map of the Xiaohulishan ore deposit (b) (modified after [27])

Fig.2 The measured section (a,b,c,d) and petrographic characteristics (e,f,g,h) of the ore-bearing wallrock in the Xiaohulishan deposit

Table 1 EPMA analysis results of feldspars from the Xiaohulishan andesitic porphyry

样品号	w_B/%											Si	Al	Ca	Na	K	An	Ab	Or
样品号	SiO₂	Al₂O₃	CaO	Na₂O	K₂O	MgO	FeO	MnO	TiO₂	Cr₂O₃	Total	Si	Al	Ca	Na	K	An	Ab	Or
XHLS-1-10	67.94	19.39	0.46	11.19	0.09	0.01	0.14		0.00		99.21	2.99	1.01	0.02	0.96	0.01	2.19	97.30	0.51
XHLS-1-11	67.53	19.42	0.65	11.00	0.20		0.38		0.00	0.01	99.19	2.99	1.01	0.03	0.94	0.01	3.12	95.71	1.17
XHLS-1-17	67.84	20.08	0.69	10.75	0.09	0.03	0.02				99.46	2.98	1.04	0.03	0.91	0.01	3.38	96.09	0.53
XHLS-1-18	67.75	19.78	0.85	10.89	0.13		0.15	0.02	0.03	0.03	99.61	2.98	1.02	0.04	0.93	0.01	4.10	95.16	0.73
XHLS-1-19	62.64	17.50	0.22	0.67	15.86		0.15	0.02	0.01	0.04	97.08	3.00	0.99	0.01	0.06	0.97	1.10	5.98	92.93
XHLS-1-20	44.63	23.34	21.94	0.66	0.11		0.10	0.06		0.02	90.85	2.31	1.42	1.22	0.07	0.01	94.32	5.12	0.56

Table 2 EPMA analysis results of hornblendes from the Xiaohulishan andesitic porphyry

样品号	w_B/%										S $i T *$	Al_T	Al_C	F $e C 3 +$	Ti_C	Mg_C	F $e C 2 +$	F $e B 2 +$	Mn_B	Ca_B	Na_B	Ca_A	Na_A	K_A
样品号	SiO₂	TiO₂	Al₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	Total	S $i T *$	Al_T	Al_C	F $e C 3 +$	Ti_C	Mg_C	F $e C 2 +$	F $e B 2 +$	Mn_B	Ca_B	Na_B	Ca_A	Na_A	K_A
XHLS-1-12	48.09	0.24	6.82	17.50	0.46	10.24	11.54	0.43	0.32	95.65	7.28	0.72	0.50	0.83	0.03	2.31	1.34	0.06	0.06	1.87	0.01		0.11	0.06
XHLS-1-13	44.62	1.07	9.07	15.13	0.37	11.70	10.88	1.25	0.56	94.64	6.82	1.18	0.45	0.52	0.12	2.67	1.24	0.18	0.05	1.78		0.00	0.37	0.11
XHLS-1-14	45.41	1.29	8.33	13.34	0.50	13.06	10.74	1.29	0.55	94.54	6.89	1.11	0.38	0.54	0.15	2.95	0.99	0.17	0.07	1.75	0.02		0.36	0.11
XHLS-1-15	42.73	1.25	11.05	14.19	0.40	11.92	11.02	1.73	0.65	94.97	6.52	1.48	0.51	0.34	0.14	2.71	1.30	0.17	0.05	1.78		0.03	0.51	0.13
XHLS-1-16	44.36	1.24	9.80	13.86	0.49	12.36	10.73	1.51	0.67	95.01	6.72	1.28	0.48	0.45	0.14	2.79	1.14	0.17	0.06	1.74	0.03		0.42	0.13

Table 2 EPMA analysis results of hornblendes from the Xiaohulishan andesitic porphyry

样品号	w_B/%										S $i T *$	Al_T	Al_C	F $e C 3 +$	Ti_C	Mg_C	F $e C 2 +$	F $e B 2 +$	Mn_B	Ca_B	Na_B	Ca_A	Na_A	K_A
样品号	SiO₂	TiO₂	Al₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	Total	S $i T *$	Al_T	Al_C	F $e C 3 +$	Ti_C	Mg_C	F $e C 2 +$	F $e B 2 +$	Mn_B	Ca_B	Na_B	Ca_A	Na_A	K_A
XHLS-1-12	48.09	0.24	6.82	17.50	0.46	10.24	11.54	0.43	0.32	95.65	7.28	0.72	0.50	0.83	0.03	2.31	1.34	0.06	0.06	1.87	0.01		0.11	0.06
XHLS-1-13	44.62	1.07	9.07	15.13	0.37	11.70	10.88	1.25	0.56	94.64	6.82	1.18	0.45	0.52	0.12	2.67	1.24	0.18	0.05	1.78		0.00	0.37	0.11
XHLS-1-14	45.41	1.29	8.33	13.34	0.50	13.06	10.74	1.29	0.55	94.54	6.89	1.11	0.38	0.54	0.15	2.95	0.99	0.17	0.07	1.75	0.02		0.36	0.11
XHLS-1-15	42.73	1.25	11.05	14.19	0.40	11.92	11.02	1.73	0.65	94.97	6.52	1.48	0.51	0.34	0.14	2.71	1.30	0.17	0.05	1.78		0.03	0.51	0.13
XHLS-1-16	44.36	1.24	9.80	13.86	0.49	12.36	10.73	1.51	0.67	95.01	6.72	1.28	0.48	0.45	0.14	2.79	1.14	0.17	0.06	1.74	0.03		0.42	0.13

Fig.3 The discriminative diagrams of silicate minerals from the Xiaohulishan andesitic porphyry

Table 3 LA-ICP-MS U-Pb dating results of zircon grains from the Xiaohulishan volcanic rocks

样号	w_B/10^-6			²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	±1σ	²⁰⁷Pb/²³⁵U		±1σ		²⁰⁶Pb/²³⁸U		±1σ		年龄及误差/Ma
样号	Pb_c	²³⁸U	²³²Th	²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	±1σ	²⁰⁷Pb/²³⁵U		±1σ		²⁰⁶Pb/²³⁸U		±1σ		²⁰⁷Pb/²⁰⁶Pb	±1σ	²⁰⁷Pb/²³⁵U	±1σ	²⁰⁶Pb/²³⁸U	±1σ
XHLS-01-01	0	488	303	0.620 9	0.056 4	0.002 1	0.525 3		0.019 0		0.067 7		0.001 8		478	81	429	13	422	11
XHLS-01-02	15	2 016	746	0.370 0	0.078 6	0.002 8	0.296 2		0.010 7		0.027 3		0.000 8		1 161	72	263	8	174	5
XHLS-01-03	3	340	275	0.808 8	0.061 5	0.002 6	0.580 7		0.022 6		0.068 8		0.001 9		657	91	465	15	429	12
XHLS-01-04	2	190	98	0.516 3	0.086 9	0.003 8	0.832 9		0.033 6		0.069 5		0.002 0		1 359	85	615	19	433	12
XHLS-01-05	17	2 276	964	0.423 6	0.085 6	0.003 5	0.327 7		0.012 4		0.027 8		0.0008		1 331	79	288	10	177	5
XHLS-01-06	3	271	147	0.542 4	0.067 1	0.003 0	0.643 5		0.025 5		0.069 9		0.002 0		843	93	504	16	436	12
XHLS-01-07	4	545	272	0.499 1	0.061 2	0.002 4	0.575 7		0.021 1		0.068 2		0.002 0		656	81	462	14	425	12
XHLS-01-08	15	770	566	0.735 1	0.224 1	0.014 5	0.846 0		0.076 4		0.024 1		0.001 0		3 010	104	622	42	154	6
XHLS-01-09	3	376	239	0.635 6	0.069 6	0.002 9	0.627 1		0.025 2		0.064 9		0.001 8		917	85	494	16	405	11
XHLS-01-10	3	891	305	0.342 3	0.056 5	0.002 0	0.522 1		0.017 5		0.066 5		0.001 8		472	78	427	12	415	11
XHLS-01-11	2	761	383	0.503 3	0.057 0	0.002 2	0.517 8		0.018 6		0.065 6		0.001 8		500	83	424	13	410	11
XHLS-01-12	10	335	119	0.355 2	0.141 4	0.005 1	1.427 0		0.048 7		0.072 8		0.002 0		2 256	63	900	20	453	12
XHLS-01-13	7	523	225	0.430 2	0.096 3	0.003 9	0.858 6		0.033 5		0.063 9		0.001 7		1 555	76	629	18	399	11
XHLS-01-14	2	240	138	0.575 0	0.070 8	0.002 9	0.679 4		0.024 9		0.069 5		0.001 9		950	83	526	15	433	12
XHLS-01-15	3	615	273	0.443 9	0.061 0	0.002 2	0.561 4		0.019 5		0.066 4		0.001 8		639	78	452	13	414	11
XHLS-01-16	1	477	140	0.293 5	0.060 9	0.002 6	0.559 2		0.021 3		0.066 1		0.001 8		635	91	451	14	412	11
XHLS-01-17	2	162	76	0.466 0	0.067 8	0.003 8	0.636 9		0.033 5		0.067 7		0.002 0		865	116	500	21	422	12
XHLS-01-18	2	151	64	0.424 5	0.070 9	0.003 6	0.667 1		0.029 6		0.068 3		0.002 0		955	105	519	18	426	12
XHLS-01-19	6	613	752	1.226 8	0.130 2	0.005 5	0.344 1		0.014 8		0.019 0		0.000 5		2 102	75	300	11	122	3
XHLS-01-20	3	844	254	0.300 9	0.061 0	0.002 3	0.527 9		0.018 9		0.062 4		0.001 7		639	75	430	13	390	10
XHLS-01-21	10	816	107	0.131 1	0.068 4	0.002 7	0.655 1		0.023 0		0.069 2		0.002 0		880	83	512	14	431	12
XHLS-01-22	2	238	73	0.308 0	0.061 3	0.002 8	0.561 7		0.024 4		0.066 4		0.001 9		650	98	453	16	415	11
XHLS-01-23	2	526	210	0.399 2	0.059 0	0.002 3	0.535 1		0.019 0		0.063 8		0.001 7		565	88	435	13	399	11
XHLS-01-24	1	293	80	0.271 3	0.060 8	0.002 4	0.573 1		0.021 6		0.068 4		0.001 9		632	90	460	14	426	11
XHLS-01-25	4	312	236	0.756 4	0.057 1	0.002 4	0.510 5		0.020 2		0.064 8		0.001 8		498	60	419	14	405	11
XHLS-01-26	7	448	156	0.348 2	0.059 8	0.002 4	0.594 5		0.023 0		0.071 9		0.002 0		598	85	474	15	447	12
XHLS-01-27	6	162	44	0.268 5	0.117 7	0.005 7	1.202 9		0.057 6		0.071 2		0.002 0		1 921	87	802	27	443	12
XHLS-01-28	11	193	101	0.523 3	0.134 8	0.005 9	1.367 1		0.056 0		0.073 4		0.002 1		2 161	76	875	24	457	12
XHLS-01-29	7	416	124	0.298 1	0.066 2	0.003 0	0.668 7		0.026 1		0.073 4		0.002 1		813	94	520	16	457	13
XHLS-01-30	5	578	247	0.427 3	0.058 9	0.002 2	0.530 8		0.019 1		0.065 3		0.001 8		561	83	432	13	408	11
XHLS-01-31	3	650	238	0.366 2	0.056 2	0.001 9	0.515 8		0.017 5		0.066 0		0.001 8		461	108	422	12	412	11
XHLS-01-32	3	183	97	0.528 4	0.066 6	0.003 0	0.664 0		0.028 4		0.072 5		0.002 1		828	96	517	17	451	13
XHLS-01-33	11	1 419	660	0.465 1	0.063 3	0.002 0	0.711 8		0.023 1		0.081 1		0.002 3		720	67	546	14	503	14
XHLS-01-34	42	1 270	325	0.255 9	0.168 2	0.011 7	0.745 9		0.089 5		0.027 0		0.001 3		2 540	118	566	52	172	8
XHLS-01-35	4	260	143	0.550 0	0.058 2	0.002 7	0.533 7		0.022 0		0.065 0		0.001 9		600	100	434	15	406	12
XHLS-01-36	11	836	333	0.398 3	0.071 0	0.002 7	0.729 4		0.027 7		0.074 0		0.002 0		967	79	556	16	460	12
XHLS-01-37	0	707	382	0.540 3	0.056 8	0.002 1	0.536 3		0.018 9		0.068 3		0.001 8		483	47	436	13	426	11
XHLS-01-38	3	239	80	0.332 6	0.061 2	0.002 6	0.574 6		0.022 7		0.068 4		0.001 9		656	95	461	15	426	12
XHLS-02-01	3	426	147	0.345 1	0.066 4	0.002 4	0.893 8		0.031 7		0.097 7		0.002 6		818	78	648	17	601	16
样号	w_B/10^-6			²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	±1σ		²⁰⁷Pb/²³⁵U		±1σ		²⁰⁶Pb/²³⁸U		±1σ	年龄及误差/Ma
样号	Pb_c	²³⁸U	²³²Th	²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	±1σ		²⁰⁷Pb/²³⁵U		±1σ		²⁰⁶Pb/²³⁸U		±1σ	²⁰⁷Pb/²⁰⁶Pb	±1σ	²⁰⁷Pb/²³⁵U	±1σ	²⁰⁶Pb/²³⁸U	±1σ
XHLS-02-02	2	251	236	0.940 2	0.069 9	0.003 0		0.734 2		0.028 4		0.076 7		0.002 2	925	89	559	17	477	13
XHLS-02-03	2	137	127	0.927 0	0.076 4	0.003 2		1.020 3		0.042 8		0.096 8		0.002 7	1 106	85	714	22	596	16
XHLS-02-04	3	74	60	0.812 2	0.101 3	0.005 7		1.093 2		0.056 2		0.078 1		0.002 4	1 650	105	750	27	485	15
XHLS-02-05	33	1 196	622	0.520 1	0.096 0	0.003 4		1.458 0		0.047 1		0.110 3		0.003 0	1 550	67	913	20	674	18
XHLS-02-06	13	712	471	0.661 5	0.091 4	0.003 1		0.902 4		0.030 2		0.071 6		0.002 0	1 455	63	653	16	446	12
XHLS-02-07	40	1 334	238	0.178 4	0.127 7	0.004 2		1.774 6		0.055 8		0.101 3		0.003 0	2 066	59	1 036	20	622	17
XHLS-02-08	1	133	89	0.666 9	0.087 7	0.003 8		0.780 0		0.034 5		0.064 8		0.001 9	1 377	79	585	20	405	12
XHLS-02-09	3	308	101	0.327 9	0.066 0	0.002 5		1.209 8		0.040 2		0.132 6		0.003 5	806	80	805	19	803	20
XHLS-02-10	2	376	166	0.441 5	0.062 8	0.002 3		0.669 2		0.023 8		0.077 3		0.002 1	702	72	520	15	480	13
XHLS-02-11	3	179	93	0.519 0	0.119 5	0.003 8		5.539 6		0.174 9		0.336 1		0.009 3	1 948	53	1 907	27	1 868	45
XHLS-02-12	2	81	65	0.798 3	0.105 7	0.003 8		4.704 8		0.157 3		0.316 3		0.008 7	1 728	65	1 768	28	1 772	43
XHLS-02-13	3	562	286	0.508 9	0.061 2	0.002 3		0.544 3		0.019 4		0.064 5		0.001 7	656	80	441	13	403	11
XHLS-02-14	5	377	238	0.631 3	0.070 6	0.002 6		1.257 5		0.043 6		0.128 6		0.003 4	946	72	827	20	780	20
XHLS-02-15	6	404	96	0.237 9	0.077 3	0.002 9		1.533 3		0.054 9		0.144 0		0.003 9	1 128	108	944	22	867	22
XHLS-02-16	3	458	123	0.268 6	0.069 6	0.002 6		1.482 7		0.053 3		0.154 2		0.004 2	917	78	923	22	924	23
XHLS-02-17	4	351	186	0.529 9	0.067 6	0.002 9		0.748 8		0.031 3		0.079 7		0.002 2	857	89	568	18	494	13
XHLS-02-18	4	144	87	0.604 9	0.084 2	0.004 0		0.901 7		0.039 5		0.077 8		0.002 3	1 298	60	653	21	483	14
XHLS-02-19	3	47	45	0.957 8	0.101 8	0.005 1		2.078 7		0.106 5		0.148 0		0.004 6	1 658	94	1 142	35	890	26
XHLS-02-20	1	61	5	0.084 9	0.123 6	0.005 1		6.217 8		0.229 8		0.364 2		0.010 4	2 010	68	2 007	32	2 002	49
XHLS-02-21	6	906	428	0.472 4	0.058 5	0.002 1		0.703 6		0.024 0		0.086 9		0.002 4	550	75	541	14	537	14
XHLS-02-22	1	156	113	0.724 4	0.089 5	0.004 2		0.744 5		0.034 4		0.060 5		0.001 8	1 417	89	565	20	379	11
XHLS-02-23	2	211	49	0.230 8	0.062 7	0.002 7		0.629 2		0.025 0		0.072 1		0.002 1	698	91	496	16	449	13
XHLS-02-24	14	925	389	0.420 5	0.079 5	0.002 8		1.323 1		0.045 1		0.120 3		0.003 3	1 187	66	856	20	732	19
XHLS-02-25	3	188	71	0.375 0	0.064 7	0.003 0		0.701 5		0.030 7		0.079 0		0.002 3	765	100	540	18	490	14
XHLS-02-26	1	394	62	0.157 6	0.062 3	0.002 4		1.150 9		0.041 3		0.133 5		0.003 7	687	77	778	20	808	21
XHLS-02-27	5	250	194	0.776 0	0.076 3	0.0039		0.540 0		0.026 2		0.050 2		0.001 4	1 103	102	438	17	316	9
XHLS-02-28	1	177	160	0.904 0	0.065 7	0.002 7		0.739 1		0.028 8		0.082 2		0.002 5	798	85	562	17	509	15
XHLS-02-29	2	96	64	0.672 6	0.078 4	0.003 4		0.871 6		0.037 5		0.080 8		0.002 3	1 167	54	636	20	501	14
XHLS-02-30	3	606	257	0.424 1	0.060 5	0.002 2		0.712 6		0.026 8		0.084 8		0.002 3	620	78	546	16	525	14
XHLS-02-31	5	242	100	0.412 8	0.067 3	0.002 7		0.698 3		0.028 5		0.075 5		0.002 1	848	85	538	17	469	13
XHLS-02-32	4	454	290	0.638 8	0.056 6	0.002 3		0.633 1		0.021 2		0.080 7		0.002 2	476	89	498	13	500	13
XHLS-02-33	6	389	36	0.091 5	0.075 0	0.002 3		1.902 8		0.063 9		0.183 2		0.005 5	1 133	62	1 082	22	1 084	30
XHLS-02-34	1	192	97	0.506 3	0.060 8	0.002 3		0.624 5		0.024 4		0.074 1		0.002 1	632	86	493	15	461	13
XHLS-02-35	2	328	89	0.270 1	0.064 2	0.002 1		1.354 5		0.042 3		0.150 5		0.004 0	750	71	869	18	904	22
XHLS-02-36	6	649	293	0.451 5	0.070 2	0.002 5		0.843 6		0.029 5		0.086 8		0.002 4	1 000	72	621	16	537	14
XHLS-02-37	1	209	120	0.574 2	0.065 0	0.002 5		0.729 1		0.025 7		0.081 3		0.002 2	772	83	556	15	504	13
XHLS-02-38	1	134	67	0.503 0	0.066 3	0.003 2		0.741 9		0.034 0		0.080 6		0.002 3	817	100	563	20	500	14
XHLS-02-39	2	243	213	0.876 5	0.058 8	0.002 2		0.645 3		0.023 3		0.079 2		0.002 2	567	82	506	14	491	13
XHLS-02-40	14	195	138	0.707 7	0.061 5	0.002 8		0.552 1		0.023 0		0.065 3		0.001 9	657	100	446	15	408	12

Table 3 LA-ICP-MS U-Pb dating results of zircon grains from the Xiaohulishan volcanic rocks

样号	w_B/10^-6			²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	±1σ	²⁰⁷Pb/²³⁵U		±1σ		²⁰⁶Pb/²³⁸U		±1σ		年龄及误差/Ma
样号	Pb_c	²³⁸U	²³²Th	²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	±1σ	²⁰⁷Pb/²³⁵U		±1σ		²⁰⁶Pb/²³⁸U		±1σ		²⁰⁷Pb/²⁰⁶Pb	±1σ	²⁰⁷Pb/²³⁵U	±1σ	²⁰⁶Pb/²³⁸U	±1σ
XHLS-01-01	0	488	303	0.620 9	0.056 4	0.002 1	0.525 3		0.019 0		0.067 7		0.001 8		478	81	429	13	422	11
XHLS-01-02	15	2 016	746	0.370 0	0.078 6	0.002 8	0.296 2		0.010 7		0.027 3		0.000 8		1 161	72	263	8	174	5
XHLS-01-03	3	340	275	0.808 8	0.061 5	0.002 6	0.580 7		0.022 6		0.068 8		0.001 9		657	91	465	15	429	12
XHLS-01-04	2	190	98	0.516 3	0.086 9	0.003 8	0.832 9		0.033 6		0.069 5		0.002 0		1 359	85	615	19	433	12
XHLS-01-05	17	2 276	964	0.423 6	0.085 6	0.003 5	0.327 7		0.012 4		0.027 8		0.0008		1 331	79	288	10	177	5
XHLS-01-06	3	271	147	0.542 4	0.067 1	0.003 0	0.643 5		0.025 5		0.069 9		0.002 0		843	93	504	16	436	12
XHLS-01-07	4	545	272	0.499 1	0.061 2	0.002 4	0.575 7		0.021 1		0.068 2		0.002 0		656	81	462	14	425	12
XHLS-01-08	15	770	566	0.735 1	0.224 1	0.014 5	0.846 0		0.076 4		0.024 1		0.001 0		3 010	104	622	42	154	6
XHLS-01-09	3	376	239	0.635 6	0.069 6	0.002 9	0.627 1		0.025 2		0.064 9		0.001 8		917	85	494	16	405	11
XHLS-01-10	3	891	305	0.342 3	0.056 5	0.002 0	0.522 1		0.017 5		0.066 5		0.001 8		472	78	427	12	415	11
XHLS-01-11	2	761	383	0.503 3	0.057 0	0.002 2	0.517 8		0.018 6		0.065 6		0.001 8		500	83	424	13	410	11
XHLS-01-12	10	335	119	0.355 2	0.141 4	0.005 1	1.427 0		0.048 7		0.072 8		0.002 0		2 256	63	900	20	453	12
XHLS-01-13	7	523	225	0.430 2	0.096 3	0.003 9	0.858 6		0.033 5		0.063 9		0.001 7		1 555	76	629	18	399	11
XHLS-01-14	2	240	138	0.575 0	0.070 8	0.002 9	0.679 4		0.024 9		0.069 5		0.001 9		950	83	526	15	433	12
XHLS-01-15	3	615	273	0.443 9	0.061 0	0.002 2	0.561 4		0.019 5		0.066 4		0.001 8		639	78	452	13	414	11
XHLS-01-16	1	477	140	0.293 5	0.060 9	0.002 6	0.559 2		0.021 3		0.066 1		0.001 8		635	91	451	14	412	11
XHLS-01-17	2	162	76	0.466 0	0.067 8	0.003 8	0.636 9		0.033 5		0.067 7		0.002 0		865	116	500	21	422	12
XHLS-01-18	2	151	64	0.424 5	0.070 9	0.003 6	0.667 1		0.029 6		0.068 3		0.002 0		955	105	519	18	426	12
XHLS-01-19	6	613	752	1.226 8	0.130 2	0.005 5	0.344 1		0.014 8		0.019 0		0.000 5		2 102	75	300	11	122	3
XHLS-01-20	3	844	254	0.300 9	0.061 0	0.002 3	0.527 9		0.018 9		0.062 4		0.001 7		639	75	430	13	390	10
XHLS-01-21	10	816	107	0.131 1	0.068 4	0.002 7	0.655 1		0.023 0		0.069 2		0.002 0		880	83	512	14	431	12
XHLS-01-22	2	238	73	0.308 0	0.061 3	0.002 8	0.561 7		0.024 4		0.066 4		0.001 9		650	98	453	16	415	11
XHLS-01-23	2	526	210	0.399 2	0.059 0	0.002 3	0.535 1		0.019 0		0.063 8		0.001 7		565	88	435	13	399	11
XHLS-01-24	1	293	80	0.271 3	0.060 8	0.002 4	0.573 1		0.021 6		0.068 4		0.001 9		632	90	460	14	426	11
XHLS-01-25	4	312	236	0.756 4	0.057 1	0.002 4	0.510 5		0.020 2		0.064 8		0.001 8		498	60	419	14	405	11
XHLS-01-26	7	448	156	0.348 2	0.059 8	0.002 4	0.594 5		0.023 0		0.071 9		0.002 0		598	85	474	15	447	12
XHLS-01-27	6	162	44	0.268 5	0.117 7	0.005 7	1.202 9		0.057 6		0.071 2		0.002 0		1 921	87	802	27	443	12
XHLS-01-28	11	193	101	0.523 3	0.134 8	0.005 9	1.367 1		0.056 0		0.073 4		0.002 1		2 161	76	875	24	457	12
XHLS-01-29	7	416	124	0.298 1	0.066 2	0.003 0	0.668 7		0.026 1		0.073 4		0.002 1		813	94	520	16	457	13
XHLS-01-30	5	578	247	0.427 3	0.058 9	0.002 2	0.530 8		0.019 1		0.065 3		0.001 8		561	83	432	13	408	11
XHLS-01-31	3	650	238	0.366 2	0.056 2	0.001 9	0.515 8		0.017 5		0.066 0		0.001 8		461	108	422	12	412	11
XHLS-01-32	3	183	97	0.528 4	0.066 6	0.003 0	0.664 0		0.028 4		0.072 5		0.002 1		828	96	517	17	451	13
XHLS-01-33	11	1 419	660	0.465 1	0.063 3	0.002 0	0.711 8		0.023 1		0.081 1		0.002 3		720	67	546	14	503	14
XHLS-01-34	42	1 270	325	0.255 9	0.168 2	0.011 7	0.745 9		0.089 5		0.027 0		0.001 3		2 540	118	566	52	172	8
XHLS-01-35	4	260	143	0.550 0	0.058 2	0.002 7	0.533 7		0.022 0		0.065 0		0.001 9		600	100	434	15	406	12
XHLS-01-36	11	836	333	0.398 3	0.071 0	0.002 7	0.729 4		0.027 7		0.074 0		0.002 0		967	79	556	16	460	12
XHLS-01-37	0	707	382	0.540 3	0.056 8	0.002 1	0.536 3		0.018 9		0.068 3		0.001 8		483	47	436	13	426	11
XHLS-01-38	3	239	80	0.332 6	0.061 2	0.002 6	0.574 6		0.022 7		0.068 4		0.001 9		656	95	461	15	426	12
XHLS-02-01	3	426	147	0.345 1	0.066 4	0.002 4	0.893 8		0.031 7		0.097 7		0.002 6		818	78	648	17	601	16
样号	w_B/10^-6			²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	±1σ		²⁰⁷Pb/²³⁵U		±1σ		²⁰⁶Pb/²³⁸U		±1σ	年龄及误差/Ma
样号	Pb_c	²³⁸U	²³²Th	²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	±1σ		²⁰⁷Pb/²³⁵U		±1σ		²⁰⁶Pb/²³⁸U		±1σ	²⁰⁷Pb/²⁰⁶Pb	±1σ	²⁰⁷Pb/²³⁵U	±1σ	²⁰⁶Pb/²³⁸U	±1σ
XHLS-02-02	2	251	236	0.940 2	0.069 9	0.003 0		0.734 2		0.028 4		0.076 7		0.002 2	925	89	559	17	477	13
XHLS-02-03	2	137	127	0.927 0	0.076 4	0.003 2		1.020 3		0.042 8		0.096 8		0.002 7	1 106	85	714	22	596	16
XHLS-02-04	3	74	60	0.812 2	0.101 3	0.005 7		1.093 2		0.056 2		0.078 1		0.002 4	1 650	105	750	27	485	15
XHLS-02-05	33	1 196	622	0.520 1	0.096 0	0.003 4		1.458 0		0.047 1		0.110 3		0.003 0	1 550	67	913	20	674	18
XHLS-02-06	13	712	471	0.661 5	0.091 4	0.003 1		0.902 4		0.030 2		0.071 6		0.002 0	1 455	63	653	16	446	12
XHLS-02-07	40	1 334	238	0.178 4	0.127 7	0.004 2		1.774 6		0.055 8		0.101 3		0.003 0	2 066	59	1 036	20	622	17
XHLS-02-08	1	133	89	0.666 9	0.087 7	0.003 8		0.780 0		0.034 5		0.064 8		0.001 9	1 377	79	585	20	405	12
XHLS-02-09	3	308	101	0.327 9	0.066 0	0.002 5		1.209 8		0.040 2		0.132 6		0.003 5	806	80	805	19	803	20
XHLS-02-10	2	376	166	0.441 5	0.062 8	0.002 3		0.669 2		0.023 8		0.077 3		0.002 1	702	72	520	15	480	13
XHLS-02-11	3	179	93	0.519 0	0.119 5	0.003 8		5.539 6		0.174 9		0.336 1		0.009 3	1 948	53	1 907	27	1 868	45
XHLS-02-12	2	81	65	0.798 3	0.105 7	0.003 8		4.704 8		0.157 3		0.316 3		0.008 7	1 728	65	1 768	28	1 772	43
XHLS-02-13	3	562	286	0.508 9	0.061 2	0.002 3		0.544 3		0.019 4		0.064 5		0.001 7	656	80	441	13	403	11
XHLS-02-14	5	377	238	0.631 3	0.070 6	0.002 6		1.257 5		0.043 6		0.128 6		0.003 4	946	72	827	20	780	20
XHLS-02-15	6	404	96	0.237 9	0.077 3	0.002 9		1.533 3		0.054 9		0.144 0		0.003 9	1 128	108	944	22	867	22
XHLS-02-16	3	458	123	0.268 6	0.069 6	0.002 6		1.482 7		0.053 3		0.154 2		0.004 2	917	78	923	22	924	23
XHLS-02-17	4	351	186	0.529 9	0.067 6	0.002 9		0.748 8		0.031 3		0.079 7		0.002 2	857	89	568	18	494	13
XHLS-02-18	4	144	87	0.604 9	0.084 2	0.004 0		0.901 7		0.039 5		0.077 8		0.002 3	1 298	60	653	21	483	14
XHLS-02-19	3	47	45	0.957 8	0.101 8	0.005 1		2.078 7		0.106 5		0.148 0		0.004 6	1 658	94	1 142	35	890	26
XHLS-02-20	1	61	5	0.084 9	0.123 6	0.005 1		6.217 8		0.229 8		0.364 2		0.010 4	2 010	68	2 007	32	2 002	49
XHLS-02-21	6	906	428	0.472 4	0.058 5	0.002 1		0.703 6		0.024 0		0.086 9		0.002 4	550	75	541	14	537	14
XHLS-02-22	1	156	113	0.724 4	0.089 5	0.004 2		0.744 5		0.034 4		0.060 5		0.001 8	1 417	89	565	20	379	11
XHLS-02-23	2	211	49	0.230 8	0.062 7	0.002 7		0.629 2		0.025 0		0.072 1		0.002 1	698	91	496	16	449	13
XHLS-02-24	14	925	389	0.420 5	0.079 5	0.002 8		1.323 1		0.045 1		0.120 3		0.003 3	1 187	66	856	20	732	19
XHLS-02-25	3	188	71	0.375 0	0.064 7	0.003 0		0.701 5		0.030 7		0.079 0		0.002 3	765	100	540	18	490	14
XHLS-02-26	1	394	62	0.157 6	0.062 3	0.002 4		1.150 9		0.041 3		0.133 5		0.003 7	687	77	778	20	808	21
XHLS-02-27	5	250	194	0.776 0	0.076 3	0.0039		0.540 0		0.026 2		0.050 2		0.001 4	1 103	102	438	17	316	9
XHLS-02-28	1	177	160	0.904 0	0.065 7	0.002 7		0.739 1		0.028 8		0.082 2		0.002 5	798	85	562	17	509	15
XHLS-02-29	2	96	64	0.672 6	0.078 4	0.003 4		0.871 6		0.037 5		0.080 8		0.002 3	1 167	54	636	20	501	14
XHLS-02-30	3	606	257	0.424 1	0.060 5	0.002 2		0.712 6		0.026 8		0.084 8		0.002 3	620	78	546	16	525	14
XHLS-02-31	5	242	100	0.412 8	0.067 3	0.002 7		0.698 3		0.028 5		0.075 5		0.002 1	848	85	538	17	469	13
XHLS-02-32	4	454	290	0.638 8	0.056 6	0.002 3		0.633 1		0.021 2		0.080 7		0.002 2	476	89	498	13	500	13
XHLS-02-33	6	389	36	0.091 5	0.075 0	0.002 3		1.902 8		0.063 9		0.183 2		0.005 5	1 133	62	1 082	22	1 084	30
XHLS-02-34	1	192	97	0.506 3	0.060 8	0.002 3		0.624 5		0.024 4		0.074 1		0.002 1	632	86	493	15	461	13
XHLS-02-35	2	328	89	0.270 1	0.064 2	0.002 1		1.354 5		0.042 3		0.150 5		0.004 0	750	71	869	18	904	22
XHLS-02-36	6	649	293	0.451 5	0.070 2	0.002 5		0.843 6		0.029 5		0.086 8		0.002 4	1 000	72	621	16	537	14
XHLS-02-37	1	209	120	0.574 2	0.065 0	0.002 5		0.729 1		0.025 7		0.081 3		0.002 2	772	83	556	15	504	13
XHLS-02-38	1	134	67	0.503 0	0.066 3	0.003 2		0.741 9		0.034 0		0.080 6		0.002 3	817	100	563	20	500	14
XHLS-02-39	2	243	213	0.876 5	0.058 8	0.002 2		0.645 3		0.023 3		0.079 2		0.002 2	567	82	506	14	491	13
XHLS-02-40	14	195	138	0.707 7	0.061 5	0.002 8		0.552 1		0.023 0		0.065 3		0.001 9	657	100	446	15	408	12

Fig.4 Zircon CL images and U-Pb concordia age diagrams of the Xiaohulishan volcanic rocks

Table 4 The major and trace elements data of the Xiaohulishan volcanic rocks

样品号	地区	岩性	w_B/%													Mg^#	w_B/10^-6
样品号	地区	岩性	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	LOI	Total	Mg^#	Rb	Ba	Nb
XHLS-01	小狐狸山	安山玢岩	58.19	0.57	16.78	1.06	4.99	0.12	2.71	5.85	4.12	1.66	0.40	2.78	99.23	45.00	31.70	947	3.80
1912-80		安山玢岩	57.18	0.90	14.58	4.95	5.62	0.22	4.69	2.87	3.36	3.61	0.10	1.06	99.14	45.00	333.00	183	26.80
XHLS-02		安山岩	67.24	0.74	14.30	1.28	4.13	0.06	2.28	0.92	6.02	0.38	0.20	1.81	99.36	43.00	9.61	126	7.49
11BS022b	大狐狸山	玄武岩	52.23	0.78	19.19	2.55	4.98	0.16	4.72	7.45	4.24	1.27	0.58	1.73	99.88	53.32	30.90	448	6.07
11BS023b			50.50	1.00	16.22	2.46	7.22	0.19	6.32	6.32	1.86	1.49	0.84	2.11	96.53	54.17	40.80	308	6.06
11BS024b			51.82	1.01	15.11	2.09	7.06	0.16	7.30	7.30	1.69	3.14	0.84	1.91	99.43	59.08	78.20	515	5.53
11BS025b			50.42	0.97	15.47	2.20	7.33	0.22	6.26	6.26	1.96	1.63	0.84	1.92	95.48	54.17	33.60	454	6.00
11BS026b			49.47	1.03	15.40	1.83	7.87	0.21	7.33	7.33	1.49	1.79	0.85	2.03	96.63	57.56	34.50	596	5.71
11BS027b		安山玄武岩	57.20	0.76	16.13	2.40	4.62	0.13	4.87	4.87	3.77	1.19	0.72	1.32	97.98	55.92	21.90	640	5.34
样品号	地区	岩性	w_B/10^-6
样品号	地区	岩性	Sr	Zr	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Y
XHLS-01	小狐狸山	安山玢岩	585	87.60	14.50	24.30	3.65	15.10	3.16	1.07	2.99	0.47	2.71	0.54	1.54	0.24	1.69	0.28	14.00
1912-80		安山玢岩	168	98.70	12.70	25.70	3.35	13.50	3.02	0.98	2.88	0.52	3.19	0.67	2.00	0.33	2.62	0.44	17.10
XHLS-02		安山岩	201	166.00	16.50	42.00	4.46	18.10	3.68	0.74	3.32	0.54	3.08	0.62	1.65	0.25	1.69	0.26	15.40
11BS022b	大狐狸山	玄武岩	920	104.00	13.10	29.50	3.86	17.90	4.09	1.25	3.97	0.53	3.42	0.73	1.70	0.32	2.07	0.27	18.90
11BS023b			792	90.40	16.10	35.30	4.58	19.80	4.34	1.32	4.24	0.62	3.60	0.74	1.82	0.29	1.80	0.24	18.20
11BS024b			562	83.20	14.90	32.90	4.40	18.90	4.43	1.30	4.54	0.62	3.78	0.78	1.89	0.30	1.86	0.25	18.50
11BS025b			805	97.30	15.30	32.80	4.52	19.80	4.51	1.26	4.31	0.63	3.74	0.74	1.85	0.27	1.68	0.24	18.20
11BS026b			689	83.40	13.90	30.70	4.16	18.90	4.87	1.36	4.33	0.60	3.74	0.77	1.79	0.31	1.78	0.26	18.20
11BS027b		安山玄武岩	720	86.50	15.30	32.60	4.25	19.30	4.49	1.21	3.96	0.52	3.44	0.69	1.70	0.29	1.77	0.27	18.10
样品号	地区	岩性	w_B/10^-6										LREE/ HREE	(Gd/ Yb)_N	(La/ Yb)_N	δEu	δCe
样品号	地区	岩性	Cr	V	Cs	Th	U	Ta	Hf	∑REE	LREE	HREE	LREE/ HREE	(Gd/ Yb)_N	(La/ Yb)_N	δEu	δCe
XHLS-01	小狐狸山	安山玢岩	15.90	156.00	1.34	3.20	1.08	0.29	2.71	72.24	61.78	10.46	5.91	1.46	6.15	1.06	0.82
1912-80		安山玢岩	298.00	142.00	44.90	5.65	4.96	2.49	4.35	71.90	59.25	12.65	4.68	0.91	3.48	1.02	0.97
XHLS-02		安山岩	62.00	96.80	1.46	7.45	3.37	0.66	4.98	96.89	85.48	11.41	7.49	1.62	7.00	0.65	1.20
11BS022b	大狐狸山	玄武岩				1.99	0.98	0.54	2.45	82.71	69.70	13.01	5.36	1.58	4.54	0.94	1.02
11BS023b						2.52	1.39	0.47	2.42	94.79	81.44	13.35	6.10	1.94	6.45	0.93	1.01
11BS024b						2.57	1.28	0.47	2.11	90.85	76.83	14.02	5.48	2.01	5.75	0.88	1.00
11BS025b						2.48	1.47	0.51	2.40	91.65	78.19	13.46	5.81	2.12	6.53	0.86	0.97
11BS026b						2.15	1.35	0.50	2.16	87.47	73.89	13.58	5.44	2.01	5.60	0.89	0.99
11BS027b		安山玄武岩				1.94	1.64	0.43	2.15	89.79	77.15	12.64	6.10	1.85	6.20	0.86	0.99

Table 4 The major and trace elements data of the Xiaohulishan volcanic rocks

样品号	地区	岩性	w_B/%													Mg^#	w_B/10^-6
样品号	地区	岩性	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	LOI	Total	Mg^#	Rb	Ba	Nb
XHLS-01	小狐狸山	安山玢岩	58.19	0.57	16.78	1.06	4.99	0.12	2.71	5.85	4.12	1.66	0.40	2.78	99.23	45.00	31.70	947	3.80
1912-80		安山玢岩	57.18	0.90	14.58	4.95	5.62	0.22	4.69	2.87	3.36	3.61	0.10	1.06	99.14	45.00	333.00	183	26.80
XHLS-02		安山岩	67.24	0.74	14.30	1.28	4.13	0.06	2.28	0.92	6.02	0.38	0.20	1.81	99.36	43.00	9.61	126	7.49
11BS022b	大狐狸山	玄武岩	52.23	0.78	19.19	2.55	4.98	0.16	4.72	7.45	4.24	1.27	0.58	1.73	99.88	53.32	30.90	448	6.07
11BS023b			50.50	1.00	16.22	2.46	7.22	0.19	6.32	6.32	1.86	1.49	0.84	2.11	96.53	54.17	40.80	308	6.06
11BS024b			51.82	1.01	15.11	2.09	7.06	0.16	7.30	7.30	1.69	3.14	0.84	1.91	99.43	59.08	78.20	515	5.53
11BS025b			50.42	0.97	15.47	2.20	7.33	0.22	6.26	6.26	1.96	1.63	0.84	1.92	95.48	54.17	33.60	454	6.00
11BS026b			49.47	1.03	15.40	1.83	7.87	0.21	7.33	7.33	1.49	1.79	0.85	2.03	96.63	57.56	34.50	596	5.71
11BS027b		安山玄武岩	57.20	0.76	16.13	2.40	4.62	0.13	4.87	4.87	3.77	1.19	0.72	1.32	97.98	55.92	21.90	640	5.34
样品号	地区	岩性	w_B/10^-6
样品号	地区	岩性	Sr	Zr	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Y
XHLS-01	小狐狸山	安山玢岩	585	87.60	14.50	24.30	3.65	15.10	3.16	1.07	2.99	0.47	2.71	0.54	1.54	0.24	1.69	0.28	14.00
1912-80		安山玢岩	168	98.70	12.70	25.70	3.35	13.50	3.02	0.98	2.88	0.52	3.19	0.67	2.00	0.33	2.62	0.44	17.10
XHLS-02		安山岩	201	166.00	16.50	42.00	4.46	18.10	3.68	0.74	3.32	0.54	3.08	0.62	1.65	0.25	1.69	0.26	15.40
11BS022b	大狐狸山	玄武岩	920	104.00	13.10	29.50	3.86	17.90	4.09	1.25	3.97	0.53	3.42	0.73	1.70	0.32	2.07	0.27	18.90
11BS023b			792	90.40	16.10	35.30	4.58	19.80	4.34	1.32	4.24	0.62	3.60	0.74	1.82	0.29	1.80	0.24	18.20
11BS024b			562	83.20	14.90	32.90	4.40	18.90	4.43	1.30	4.54	0.62	3.78	0.78	1.89	0.30	1.86	0.25	18.50
11BS025b			805	97.30	15.30	32.80	4.52	19.80	4.51	1.26	4.31	0.63	3.74	0.74	1.85	0.27	1.68	0.24	18.20
11BS026b			689	83.40	13.90	30.70	4.16	18.90	4.87	1.36	4.33	0.60	3.74	0.77	1.79	0.31	1.78	0.26	18.20
11BS027b		安山玄武岩	720	86.50	15.30	32.60	4.25	19.30	4.49	1.21	3.96	0.52	3.44	0.69	1.70	0.29	1.77	0.27	18.10
样品号	地区	岩性	w_B/10^-6										LREE/ HREE	(Gd/ Yb)_N	(La/ Yb)_N	δEu	δCe
样品号	地区	岩性	Cr	V	Cs	Th	U	Ta	Hf	∑REE	LREE	HREE	LREE/ HREE	(Gd/ Yb)_N	(La/ Yb)_N	δEu	δCe
XHLS-01	小狐狸山	安山玢岩	15.90	156.00	1.34	3.20	1.08	0.29	2.71	72.24	61.78	10.46	5.91	1.46	6.15	1.06	0.82
1912-80		安山玢岩	298.00	142.00	44.90	5.65	4.96	2.49	4.35	71.90	59.25	12.65	4.68	0.91	3.48	1.02	0.97
XHLS-02		安山岩	62.00	96.80	1.46	7.45	3.37	0.66	4.98	96.89	85.48	11.41	7.49	1.62	7.00	0.65	1.20
11BS022b	大狐狸山	玄武岩				1.99	0.98	0.54	2.45	82.71	69.70	13.01	5.36	1.58	4.54	0.94	1.02
11BS023b						2.52	1.39	0.47	2.42	94.79	81.44	13.35	6.10	1.94	6.45	0.93	1.01
11BS024b						2.57	1.28	0.47	2.11	90.85	76.83	14.02	5.48	2.01	5.75	0.88	1.00
11BS025b						2.48	1.47	0.51	2.40	91.65	78.19	13.46	5.81	2.12	6.53	0.86	0.97
11BS026b						2.15	1.35	0.50	2.16	87.47	73.89	13.58	5.44	2.01	5.60	0.89	0.99
11BS027b		安山玄武岩				1.94	1.64	0.43	2.15	89.79	77.15	12.64	6.10	1.85	6.20	0.86	0.99

Fig.5 The discriminative diagrams of volcanic rock samples from the Xiaohulishan ore deposit

Fig.6 The discriminative diagrams of the trace elements of volcanic rock samples from the Xiaohulishan ore deposit

Table 5 The geochronological results of Early Paleozoic magmatic rocks in the Beishan district, Inner Mongolia

区域	地质体名称	岩性	年龄/Ma	测年方法	资料来源
乌珠尔嘎顺岛弧带	小狐狸山	安山玢岩	419±5	锆石LA-ICP-MSU-Pb	本文
乌珠尔嘎顺岛弧带	小狐狸山	安山岩	489±11	锆石LA-ICP-MS U-Pb	本文
旱山微陆块	石板井	白云母花岗细晶岩	422±47	锆石LA-ICP-MS U-Pb	文献[59]
	石板井	花岗片麻岩	450.4±3.5	LA-ICP-MS	文献[60]
	石板井	混合片麻岩	452±11	LA-ICP-MS	文献[60]
	石板井	糜棱岩	456.8±5.3	LA-ICP-MS	文献[60]
	野马梁子井东	二长花岗岩	482.3±1.8	锆石LA-ICP-MS U-Pb	文献[59]
马鬃山岛弧带	石板井	辉长岩	498.9±2.4	锆石LA-ICP-MS U-Pb	文献[58]
	辉铜山东	钾长花岗岩体	424.4±2.5	U-Pb	文献[61]
	辉铜山	钾长花岗岩体	424.4±2.5	U-Pb	文献[22]
	柳园南	花岗岩Ⅰ	424.3±1.8	U-Pb	文献[20]
	红柳河	辉长岩	425.5±2.3	U-Pb	文献[57]
	牛圈子	辉长岩	446±4	锆石LA-ICP-MS U-Pb	文献[55]
	辉铜山	辉长岩	446±3	锆石LA-ICP-MS U-Pb	文献[56]
	马鬃山西北	糜棱岩化花岗岩	447.6±4.4	锆石LA-ICP-MSU-Pb	文献[60]
	牛圈子	细碧岩	463±18	全岩Rb-Sr	文献[62]
	洗肠井	辉绿岩	470	全岩Sm-Nd	文献[63]
	马鬃山西北	糜棱岩化花岗岩	473.7±9.5	锆石LA-ICP-MSU-Pb	文献[31]
	马鬃山西北	花岗片麻岩	471.1±7.7	锆石LA-ICP-MSU-Pb	文献[31]
	牛圈子	辉长岩	486±18	全岩Rb-Sr	文献[62]
	马鬃山西北	眼球状片麻岩	498.7±6.1	锆石LA-ICP-MSU-Pb	文献[31]
	红柳河	辉长岩	512.6±7.1	SHRIMP U-Pb	文献[52]
	月牙山	辉长岩	527.0±1.3	锆石LA-ICP-MS U-Pb	文献[54]
	月牙山	斜长花岗岩	530.2±1.2	锆石LA-ICP-MS U-Pb	文献[54]
	月牙山	辉长闪长岩	530.2±4.8	锆石LA-ICP-MS U-Pb	文献[54]
	月牙山	斜长花岗岩	533±1.7	锆石LA-ICP-MS U-Pb	文献[51]
	洗肠井	斜长花岗岩	536±7	SHRIMP U-Pb	文献[53]
	月牙山	蚀变辉石岩	542.0±1.3	锆石LA-ICP-MS U-Pb	文献[54]

Table 5 The geochronological results of Early Paleozoic magmatic rocks in the Beishan district, Inner Mongolia

区域	地质体名称	岩性	年龄/Ma	测年方法	资料来源
乌珠尔嘎顺岛弧带	小狐狸山	安山玢岩	419±5	锆石LA-ICP-MSU-Pb	本文
乌珠尔嘎顺岛弧带	小狐狸山	安山岩	489±11	锆石LA-ICP-MS U-Pb	本文
旱山微陆块	石板井	白云母花岗细晶岩	422±47	锆石LA-ICP-MS U-Pb	文献[59]
	石板井	花岗片麻岩	450.4±3.5	LA-ICP-MS	文献[60]
	石板井	混合片麻岩	452±11	LA-ICP-MS	文献[60]
	石板井	糜棱岩	456.8±5.3	LA-ICP-MS	文献[60]
	野马梁子井东	二长花岗岩	482.3±1.8	锆石LA-ICP-MS U-Pb	文献[59]
马鬃山岛弧带	石板井	辉长岩	498.9±2.4	锆石LA-ICP-MS U-Pb	文献[58]
	辉铜山东	钾长花岗岩体	424.4±2.5	U-Pb	文献[61]
	辉铜山	钾长花岗岩体	424.4±2.5	U-Pb	文献[22]
	柳园南	花岗岩Ⅰ	424.3±1.8	U-Pb	文献[20]
	红柳河	辉长岩	425.5±2.3	U-Pb	文献[57]
	牛圈子	辉长岩	446±4	锆石LA-ICP-MS U-Pb	文献[55]
	辉铜山	辉长岩	446±3	锆石LA-ICP-MS U-Pb	文献[56]
	马鬃山西北	糜棱岩化花岗岩	447.6±4.4	锆石LA-ICP-MSU-Pb	文献[60]
	牛圈子	细碧岩	463±18	全岩Rb-Sr	文献[62]
	洗肠井	辉绿岩	470	全岩Sm-Nd	文献[63]
	马鬃山西北	糜棱岩化花岗岩	473.7±9.5	锆石LA-ICP-MSU-Pb	文献[31]
	马鬃山西北	花岗片麻岩	471.1±7.7	锆石LA-ICP-MSU-Pb	文献[31]
	牛圈子	辉长岩	486±18	全岩Rb-Sr	文献[62]
	马鬃山西北	眼球状片麻岩	498.7±6.1	锆石LA-ICP-MSU-Pb	文献[31]
	红柳河	辉长岩	512.6±7.1	SHRIMP U-Pb	文献[52]
	月牙山	辉长岩	527.0±1.3	锆石LA-ICP-MS U-Pb	文献[54]
	月牙山	斜长花岗岩	530.2±1.2	锆石LA-ICP-MS U-Pb	文献[54]
	月牙山	辉长闪长岩	530.2±4.8	锆石LA-ICP-MS U-Pb	文献[54]
	月牙山	斜长花岗岩	533±1.7	锆石LA-ICP-MS U-Pb	文献[51]
	洗肠井	斜长花岗岩	536±7	SHRIMP U-Pb	文献[53]
	月牙山	蚀变辉石岩	542.0±1.3	锆石LA-ICP-MS U-Pb	文献[54]

Fig.7 The tectonic discrimination diagrams of volcanic rock samples from the Xiaohulishan ore deposit. Adapted after [81].

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