Geochemical Characteristic and Ore-forming Material Sources of Daping-Jinling Barite Deposit in Northern of Daba Mountain

doi:10.19657/j.geoscience.1000-8527.2022.06.05

Abstract

Abstract:

The Daping-Jinling barite deposit is located in southern wing of the Qinling compound anticline in the southern Qinling Mountain, on the southern and western edge of the Pingli dome of Daba Mountain. The geochemical characteristic and ore-forming material sources of Daping-Jinling barite deposit in northern Daba Mountain were studied on geological background, deposit geological characteristics, carbon and oxygen isotopic and rare earth elements. The oxygen isotope compositions showed that the δ¹⁸O_V-SMOW ranged from 1.44‰ to 2.20‰, indicating that the ore-forming temperature was low-or-medium temperature(60.72-122.87 ℃). The ore and surrounding rock had similar rare earth element characteristics to reveal that the material sources of barite and surrounding rock may be the same, with high ratio of HREE/LREE, anomaly negative europium, anomaly negative cerium. The analysis of petrogenesis and tectonic environment indicates that the horizon of barite deposit is hosted the Cambrian Liujiaping Formation. The sedimentary environment is the slope facies of continental margin and provides superior conditions for the formation of $SO_{4}^{2-}$. The Sinian Dengying Formation in the underlying strata contained high abundance of Ba, which may be the main source of barium in the barite deposit.

Key words: Lujiaping Formation, geochemistry, ore-forming material sources, northern of Daba Mountain

CLC Number:

P619.251

CAO Linjie, ZHANG Yunzhou, LI Silong, WANG Zhihong, ZHANG Yao, ZHANG Han. Geochemical Characteristic and Ore-forming Material Sources of Daping-Jinling Barite Deposit in Northern of Daba Mountain[J]. Geoscience, 2022, 36(06): 1497-1502.

Figures/Tables 5

References 21

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序号	矿物	样品编号	δ¹³C_V-PDB/ ‰	δ¹⁸O_V-PDB/ ‰	δ¹⁸O_V-SMOW/ ‰
1	碳质板岩	T-1	-2.66	-12.25	1.83
2	白云岩	T-2	-10.21	-13.20	1.73
3	重晶石	T-3	-6.51	-8.98	2.17
4	重晶石	T-4	-14.26	-16.05	1.44
5	重晶石	T-5	-14.16	-14.59	1.59
6	重晶石	T-7	-13.74	-14.96	1.55
7	重晶石	T-8	-10.83	-8.67	2.20
8	含碳硅质板岩	T-9	-12.18	-13.51	1.70
9	含碳硅质板岩	T-10	-11.40	-13.92	1.66

序号	矿物	样品编号	δ¹³C_V-PDB/ ‰	δ¹⁸O_V-PDB/ ‰	δ¹⁸O_V-SMOW/ ‰
1	碳质板岩	T-1	-2.66	-12.25	1.83
2	白云岩	T-2	-10.21	-13.20	1.73
3	重晶石	T-3	-6.51	-8.98	2.17
4	重晶石	T-4	-14.26	-16.05	1.44
5	重晶石	T-5	-14.16	-14.59	1.59
6	重晶石	T-7	-13.74	-14.96	1.55
7	重晶石	T-8	-10.83	-8.67	2.20
8	含碳硅质板岩	T-9	-12.18	-13.51	1.70
9	含碳硅质板岩	T-10	-11.40	-13.92	1.66

样品编号	稀土元素质量分数/10^-6															LREE/ HREE	δEu	δCe	La/Yb
样品编号	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	∑REE	LREE/ HREE	δEu	δCe	La/Yb
T-1	7.098	11.28	1.647	7.11	1.882	0.376	4.112	0.403	2.468	0.575	1.715	0.245	1.529	0.230	181.22	2.61	0.327	0.77	4.64
T-2	28.65	47.81	6.210	23.97	4.940	1.070	13.431	0.816	5.043	1.106	3.474	0.488	3.093	0.454	183.55	4.04	0.303	0.83	9.26
T-3	9.134	9.511	1.466	6.83	1.895	1.627	6.795	0.312	2.081	0.459	1.403	0.205	1.107	0.176	60.15	2.43	0.973	0.57	8.25
T-4	4.009	2.709	0.528	2.36	0.807	0.511	4.406	0.097	0.583	0.145	0.460	0.069	0.403	0.063	51.13	1.76	0.509	0.39	9.95
T-5	6.743	6.747	1.155	5.07	1.411	1.106	7.088	0.241	1.539	0.368	1.160	0.160	1.042	0.149	75.98	1.89	0.676	0.53	6.47
T-7	7.738	8.119	1.550	6.81	1.829	1.202	8.830	0.291	2.053	0.456	1.458	0.205	1.264	0.206	77.60	1.85	0.586	0.53	6.12
T-8	7.524	8.420	1.252	5.71	1.531	0.964	6.676	0.191	1.206	0.262	0.833	0.128	0.777	0.117	186.32	2.49	0.610	0.60	9.68
T-9	30.26	54.74	6.604	25.67	5.074	1.895	12.528	0.832	5.076	1.053	3.306	0.473	2.799	0.428	332.78	4.69	0.561	0.89	10.81
T-10	37.04	61.63	8.138	32.33	6.550	1.824	12.846	1.207	7.612	1.69	5.252	0.744	4.498	0.683	182.04	4.27	0.490	0.82	8.23
均值	15.355	23.441	3.172	12.87	2.880	1.175	8.524	0.488	3.073	0.679	2.118	0.302	1.835	0.278	147.86	2.89	0.559	0.66	8.16

样品编号	稀土元素质量分数/10^-6															LREE/ HREE	δEu	δCe	La/Yb
样品编号	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	∑REE	LREE/ HREE	δEu	δCe	La/Yb
T-1	7.098	11.28	1.647	7.11	1.882	0.376	4.112	0.403	2.468	0.575	1.715	0.245	1.529	0.230	181.22	2.61	0.327	0.77	4.64
T-2	28.65	47.81	6.210	23.97	4.940	1.070	13.431	0.816	5.043	1.106	3.474	0.488	3.093	0.454	183.55	4.04	0.303	0.83	9.26
T-3	9.134	9.511	1.466	6.83	1.895	1.627	6.795	0.312	2.081	0.459	1.403	0.205	1.107	0.176	60.15	2.43	0.973	0.57	8.25
T-4	4.009	2.709	0.528	2.36	0.807	0.511	4.406	0.097	0.583	0.145	0.460	0.069	0.403	0.063	51.13	1.76	0.509	0.39	9.95
T-5	6.743	6.747	1.155	5.07	1.411	1.106	7.088	0.241	1.539	0.368	1.160	0.160	1.042	0.149	75.98	1.89	0.676	0.53	6.47
T-7	7.738	8.119	1.550	6.81	1.829	1.202	8.830	0.291	2.053	0.456	1.458	0.205	1.264	0.206	77.60	1.85	0.586	0.53	6.12
T-8	7.524	8.420	1.252	5.71	1.531	0.964	6.676	0.191	1.206	0.262	0.833	0.128	0.777	0.117	186.32	2.49	0.610	0.60	9.68
T-9	30.26	54.74	6.604	25.67	5.074	1.895	12.528	0.832	5.076	1.053	3.306	0.473	2.799	0.428	332.78	4.69	0.561	0.89	10.81
T-10	37.04	61.63	8.138	32.33	6.550	1.824	12.846	1.207	7.612	1.69	5.252	0.744	4.498	0.683	182.04	4.27	0.490	0.82	8.23
均值	15.355	23.441	3.172	12.87	2.880	1.175	8.524	0.488	3.073	0.679	2.118	0.302	1.835	0.278	147.86	2.89	0.559	0.66	8.16