山东省微山县郗山稀土矿床成矿年代学新进展

张鹏; 刘珊珊; 兰君; 李衣鑫; 邢楠; 刘敬杰; 刘袁坤; 康志强; 杨锋

doi:10.19509/j.cnki.dzkq.2022.0265

山东省微山县郗山稀土矿床成矿年代学新进展

doi: 10.19509/j.cnki.dzkq.2022.0265

张鹏^1,,
刘珊珊^2a,
兰君^1, ,,
李衣鑫^2a,
邢楠¹,
刘敬杰¹,
刘袁坤¹,
康志强^{2a, 2b},
杨锋^{2a, 2b}

1.
山东省地质矿产勘查开发局第五地质大队, 山东泰安 271000
2a.
桂林理工大学地球科学学院, 广西桂林 541004
2b.
桂林理工大学有色金属矿产勘查与资源高效利用省部共建协同创新中心, 广西桂林 541004

基金项目:

山东省自然资源厅基金项目鲁勘字（2018）30号

山东省地矿局科技创新项目 KC202104

山东省地矿局科技创新项目 KY202207

广西研究生教育创新计划项目 YCBZ2022119

广西研究生教育创新计划项目 YCSW2022313

详细信息

作者简介:
张鹏, E-mail: zhang_6999@163.com

通讯作者:
兰君, E-mail: lanjun56@126.com

中图分类号: P618.7;P597
计量
- 文章访问数: 273
- PDF下载量: 48
- 被引次数: 0
出版历程
- 收稿日期: 2022-08-15
- 录用日期: 2022-10-14
- 修回日期: 2022-10-12

New progress in the metallogenic chronology of the Chishan REE deposit in Weishan County, Shandong Province

ZHANG Peng^1
,,
LIU Shanshan^2a,
LAN Jun^{1
, ,},
LI Yixin^2a,
XING Nan¹,
LIU Jingjie¹,
LIU Yuankun¹,
KANG Zhiqiang^{2a, 2b},
YANG Feng^{2a, 2b}

1.
No. 5 Exploration Institute of Geology and Mineral Resources, Tai'an Shandong 271000, China
2a.
College of Earth Sciences in Guangxi Guilin University of Technology, Guilin Guangxi 541004, China
2b.
Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources in Guangxi Guilin University of Technology, Guilin Guangxi 541004, China

More Information

Author Bio:
ZHANG Peng, E-mail: zhang_6999@163.com

Corresponding author: LAN Jun, E-mail: lanjun56@126.com

摘要

摘要:
山东省微山县郗山稀土矿床位于华北板块东南缘，是一个以轻稀土为主的岩浆热液型稀土矿床，目前为我国第三大轻稀土矿床，对其成矿年龄还存在争议。为此，以郗山稀土矿最新勘探钻孔矿石样品为研究对象，通过野外调查、矿物学和年代学研究，采用氟碳铈矿Th-Pb同位素定年精确厘定了郗山稀土矿的成矿年代。5件氟碳铈矿Th-Pb同位素定年结果表明，郗山稀土矿床成矿时代可分为2期：早期为（125.5±0.5）~（122.2±0.5）Ma，晚期为（112.3±0.6）Ma，其中早期年龄与前人得出的矿床成矿年龄基本一致，而晚期成矿年龄则是首次报道，表明郗山稀土矿床可能存在2期成矿活动，值得关注并开展进一步工作。
- 郗山稀土矿床 /
- Th-Pb同位素定年 /
- 氟碳铈矿 /
- 微山县 /
- 山东省
Abstract: Objective
The Chishan rare earth deposit in Weishan County, Shandong Province is located on the southeastern edge of the North China Plate. It is a magmatic hydrothermal rare earth deposit mainly composed of light rare earths, and is currently the third largest light rare earth deposit in China. There is still controversy over its mineralization age.
Methods
Therefore, taking the latest exploration borehole ore samples from Chishan rare earth deposit as the research object, the mineralization age of Chishan rare earth deposit was accurately determined through field investigation, mineralogy, and chronology research, using Th-Pb isotope dating of fluorocarbon cerium ore.
Results
The Th-Pb isotope dating results of 5 fluorocarbon cerium deposits indicate that the mineralization age of the Chishan rare earth deposit can be divided into two periods: the early period is (125.5±0.5)-(122.2±0.5)Ma, and the late period is (112.3±0.6) Ma.
Conclusion
The early age is basically consistent with the mineralization age of the deposit determined by previous studies, while the late mineralization age is the first report, indicating that there may be two periods of mineralization activity in the Chishan rare earth deposit, which is worthy of attention and further work.
- Chishan REE deposit /
- Th-Pb dating /
- bastnasite /
- Weishan County /
- Shandong Province
注释:

所有作者声明不存在利益冲突。

HTML全文

图 1 鲁西区域地质简图(底图据文献[20]修改)

Figure 1. Geological sketch of the Luxi Block

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图 2 郗山稀土矿床地质图(含本次勘探线及钻孔位置) (底图据文献[31]修改)

Figure 2. Geological map of the Chishan REE deposit

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图 3 郗山稀土矿床岩心矿石样品主要矿物镜下显微照片(a~e为正交偏光，f为单偏光)

Bsn.氟碳铈矿；Py.黄铁矿；Gn.方铅矿；Sp.闪锌矿；Cp.黄铜矿；Mo.辉钼矿；Qtz.石英；Pth.条纹长石；Kp.钾长石；Cal.方解石；Fl.萤石；Brt.重晶石

Figure 3. Microscopic photographs of the main minerals indrillhole ore samples from the Chishan REE deposit

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图 4 郗山矿床岩心样品典型稀土矿物扫描电镜照片(a, b)及TIMA矿物相分布图(c, d)

Par.氟碳钙铈矿；Bsn.氟碳铈矿；Cal.方解石；Brt.重晶石；Py.黄铁矿；Fl.萤石；Ap.磷灰石；Qtz.石英；Dol(Fe).铁白云石

Figure 4. Scanning electron microscope photographs(a, b)and TIMA mineral distributions(c, d) of rare earth minerals in the drillhole samples from the Chishan deposit

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图 5 郗山稀土矿床氟碳铈矿CL图(a, c, e, g, i)以及加权平均年龄图(b, d, f, h, j)

Figure 5. CL images (a, c, e, g, i) and weighted mean Th-Pb ages (b, d, f, h, j) of bastnasite samples from the Chishan rare earth deposit

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表 1 郗山稀土矿床氟碳铈矿Th-Pb同位素定年结果

Table 1. Th-Pb isotope test results of cerium fluorocarbonate from the Chishan rare earth deposit

分析点号	Pb	Th	U	同位素比值				同位素年龄/Ma
分析点号	w_B/10^-6			²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁸Pb/²³²Th	1σ	²⁰⁸Pb/²³²Th	1σ
ZK5-2-426 m-04	169.73	31 712	21.62	0.152 9	0.025 0	0.006 1	0.000 1	122.1	1
ZK5-2-426 m-06	80.03	14 978	28.34	0.159 9	0.025 0	0.006 1	0.000 1	122.3	1
ZK5-2-426 m-08	82.88	15 731	25.97	0.140 7	0.018 4	0.006 0	0.000 1	121.3	1
ZK5-2-426 m-11	89.62	16 830	19.36	0.191 6	0.023 5	0.006 1	0.000 1	123.5	1
ZK5-2-426 m-12	82.77	15 545	28.47	0.175 3	0.025 1	0.006 1	0.000 1	122.6	1
ZK5-2-426 m-13	71.68	13 515	30.20	0.179 3	0.026 6	0.006 1	0.000 1	122.3	1
ZK5-2-426 m-14	109.87	20 792	31.86	0.213 4	0.023 5	0.006 1	0.000 1	122.9	1
ZK5-2-426 m-16	92.98	17 566	31.14	0.144 6	0.016 6	0.006 1	0.000 1	122.9	1
ZK5-2-426 m-18	121.20	23 202	22.83	0.172 9	0.030 6	0.006 1	0.000 1	122.3	1
ZK5-2-426 m-19	125.20	23 866	26.05	0.163 7	0.032 7	0.006 1	0.000 1	123.3	1
ZK5-2-426 m-20	66.91	12 926	17.46	0.192 5	0.031 6	0.006 1	0.000 1	122.3	1
ZK5-2-426 m-22	93.37	17 931	23.56	0.237 3	0.038 5	0.006 0	0.000 1	121.4	1
ZK5-2-426 m-24	115.94	22 023	23.86	0.234 8	0.038 8	0.006 1	0.000 1	123.4	1
ZK5-2-426 m-25	122.14	23 246	21.58	0.119 8	0.023 5	0.006 1	0.000 1	123.0	1
ZK5-2-426 m-26	66.20	12 733	21.04	0.190 3	0.035 9	0.006 0	0.000 1	121.0	1
ZK5-2-426 m-27	106.78	20 452	24.80	0.156 2	0.022 1	0.006 0	0.000 1	121.6	1
ZK5-2-426 m-28	153.59	29 552	23.96	0.211 7	0.030 4	0.006 0	0.000 1	121.2	1
ZK5-2-426 m-29	109.20	20 519	18.03	0.177 6	0.033 2	0.006 1	0.000 1	123.3	1
ZK5-2-426 m-30	207.57	39 797	63.79	0.146 8	0.014 3	0.006 0	0.000 1	121.5	1
ZK5-2-426 m-31	144.59	27 670	54.04	0.101 8	0.010 3	0.006 0	0.000 1	121.5	1
ZK5-2-426 m-32	77.54	14 606	33.32	0.204 0	0.023 0	0.006 1	0.000 1	122.6	1
ZK5-2-426 m-34	121.49	23 240	34.99	0.150 9	0.017 2	0.006 0	0.000 1	121.2	1
ZK5-2-426 m-35	123.77	23 784	22.47	0.245 6	0.035 7	0.006 0	0.000 1	120.7	1
ZK13-2-116 m-05	109.35	20 883	342.46	0.072 5	0.003 7	0.005 6	0.000 0	111.9	1
ZK13-2-116 m-06	101.81	19 060	289.58	0.141 6	0.006 3	0.005 7	0.000 1	114.1	1
ZK13-2-116 m-07	302.22	60 903	251.06	0.115 9	0.005 2	0.005 5	0.000 0	110.7	1
ZK13-2-116 m-11	395.75	81 395	106.57	0.223 8	0.013 9	0.005 5	0.000 1	110.0	1
ZK13-2-116 m-13	182.07	33 255	855.38	0.059 9	0.002 3	0.005 7	0.000 1	114.7	1
ZK13-2-116 m-14	276.79	55 157	185.27	0.188 6	0.010 5	0.005 6	0.000 0	112.4	1
ZK13-2-116 m-15	130.93	25 449	333.54	0.119 0	0.006 3	0.005 5	0.000 0	111.8	1
ZK13-2-116 m-16	281.57	56 600	195.61	0.097 1	0.005 6	0.005 6	0.000 0	111.9	1
ZK13-2-116 m-17	177.11	34 722	253.47	0.078 0	0.005 1	0.005 6	0.000 0	113.3	1
ZK13-2-116 m-18	370.98	76 067	92.72	0.136 1	0.017 0	0.005 5	0.000 0	111.3	1
ZK13-2-116 m-19	264.75	52 612	257.87	0.083 6	0.005 0	0.005 6	0.000 0	113.7	1
ZK13-2-116 m-20	133.94	25 202	487.28	0.068 2	0.003 1	0.005 6	0.000 0	113.5	1
ZK13-2-116 m-21	142.58	27 089	560.73	0.0603	0.002 6	0.005 5	0.000 0	111.5	1
ZK13-2-116 m-22	269.79	54 743	205.44	0.079 6	0.005 1	0.005 5	0.000 0	110.8	1
ZK13-2-116 m-23	235.59	46 987	150.72	0.130 5	0.012 0	0.005 6	0.000 0	113.0	1
ZK13-2-116 m-24	191.67	37 228	403.45	0.096 0	0.004 0	0.005 6	0.000 0	112.7	1
ZK13-2-116 m-29	299.06	59 755	260.20	0.103 7	0.006 2	0.005 6	0.000 1	112.7	1
ZK13-2-402 m-01	37.75	7 085	6.40	0.606 9	0.090 3	0.006 1	0.000 1	122.6	1
ZK13-2-402 m-02	22.41	4 244	8.78	0.483 2	0.072 4	0.006 0	0.000 1	120.7	1
ZK13-2-402 m-03	21.64	4 032	9.17	0.356 9	0.058 1	0.006 1	0.000 1	122.9	1
ZK13-2-402 m-04	30.85	5 588	12.76	0.725 4	0.094 8	0.006 2	0.000 1	125.5	1
ZK13-2-402 m-06	26.80	5 041	11.34	0.278 0	0.038 5	0.006 1	0.000 1	122.6	1
ZK13-2-402 m-08	24.99	4 731	5.64	0.793 4	0.124 4	0.006 0	0.000 1	121.4	1
ZK13-2-402 m-10	23.13	4 227	9.04	0.797 6	0.105 6	0.006 2	0.000 1	124.0	1
ZK13-2-402 m-11	31.96	5 922	9.98	0.523 0	0.086 0	0.006 2	0.000 1	124.1	1
ZK13-2-402 m-12	21.74	3 969	7.23	0.834 6	0.110 3	0.006 2	0.000 1	125.3	1
ZK13-2-402 m-13	37.47	6 933	10.42	0.204 2	0.035 7	0.006 2	0.000 1	125.1	1
ZK13-2-402 m-14	24.51	4 591	9.10	0.466 5	0.073 9	0.006 1	0.000 1	123.2	2
ZK13-2-402 m-16	23.04	4 340	13.20	0.674 4	0.098 0	0.006 0	0.000 1	121.6	2
ZK13-2-402 m-18	40.98	7 456	4.54	0.995 5	0.093 6	0.006 2	0.000 1	124.7	2
ZK13-2-402 m-19	23.91	4 474	9.03	0.537 4	0.103 1	0.006 1	0.000 1	122.8	1
ZK13-2-402 m-20	26.26	4 881	8.11	0.720 8	0.105 5	0.006 1	0.000 1	122.9	1
ZK13-2-402 m-21	28.81	5 108	11.60	0.706 2	0.052 9	0.006 3	0.000 1	126.0	1
ZK13-2-402 m-24	29.84	5 612	9.61	0.402 0	0.052 5	0.006 1	0.000 1	122.5	1
ZK13-2-402 m-25	75.82	13 883	14.67	0.566 1	0.065 6	0.006 2	0.000 1	125.8	1
ZK13-2-402 m-26	40.69	7 538	4.45	0.367 0	0.061 2	0.006 2	0.000 1	124.8	1
ZK13-2-402 m-27	29.76	5 503	8.35	0.851 5	0.131 1	0.006 1	0.000 1	122.9	1
ZK13-2-402 m-30	37.49	6 847	8.66	0.908 8	0.054 6	0.006 1	0.000 1	122.0	1
ZK13-2-402 m-33	43.66	8 132	6.21	0.348 6	0.054 2	0.006 2	0.000 1	124.6	1
ZK13-2-402 m-35	47.13	8 701	9.04	0.510 6	0.070 1	0.006 2	0.000 1	125.0	1
ZK11-1-379 m-01	105.59	19 182	7.05	0.664 0	0.055 2	0.006 2	0.000 1	124.8	1
ZK11-1-379 m-03	113.78	20 587	9.90	0.694 1	0.070 2	0.006 2	0.000 1	125.3	1
ZK11-1-379 m-04	59.00	10 639	14.30	0.677 3	0.082 5	0.006 3	0.000 1	126.3	1
ZK11-1-379 m-07	87.66	15 911	9.60	0.829 5	0.087 8	0.006 2	0.000 1	125.6	2
ZK11-1-379 m-08	222.80	41 099	54.83	0.141 2	0.010 7	0.006 2	0.000 1	124.0	2
ZK11-1-379 m-09	173.10	31 776	12.03	0.441 9	0.057 4	0.006 2	0.000 1	125.4	2
ZK11-1-379 m-10	129.58	23 688	4.35	0.896 8	0.090 9	0.006 2	0.000 1	125.1	2
ZK11-1-379 m-11	60.02	10 814	16.76	0.743 8	0.093 3	0.006 3	0.000 1	127.6	2
ZK11-1-379 m-12	76.39	13 858	11.47	0.775 0	0.063 9	0.006 2	0.000 1	125.4	1
ZK11-1-379 m-13	86.23	16 008	6.85	0.587 3	0.114 8	0.006 2	0.000 1	124.3	1
ZK11-1-379 m-15	47.49	8 748	19.71	0.489 7	0.051 7	0.006 3	0.000 1	126.2	2
ZK11-1-379 m-16	186.35	34 545	9.17	0.582 6	0.069 9	0.006 3	0.000 1	125.9	1
ZK11-1-379 m-18	174.30	32 015	53.08	0.191 1	0.015 0	0.006 3	0.000 1	127.3	1
ZK11-1-379 m-19	332.72	63 297	64.01	0.169 1	0.018 4	0.006 2	0.000 1	125.1	2
ZK11-1-379 m-20	346.23	64 157	63.69	0.155 1	0.012 4	0.006 3	0.000 1	127.6	1
ZK11-1-379 m-22	417.94	77 323	105.74	0.216 6	0.011 0	0.006 3	0.000 1	127.2	1
ZK11-1-379 m-24	106.66	19 794	25.08	0.385 3	0.045 0	0.006 2	0.000 1	125.2	1
ZK11-1-379 m-25	86.77	16 181	3.26	0.867 0	0.121 9	0.006 2	0.000 1	124.7	1
ZK11-1-379 m-26	87.90	16 204	8.48	0.426 4	0.067 4	0.006 2	0.000 1	125.5	1
ZK11-1-379 m-27	423.09	78 096	88.39	0.183 7	0.012 0	0.006 2	0.000 1	125.5	1
ZK11-1-379 m-28	163.98	30 423	6.06	0.855 8	0.093 2	0.006 2	0.000 1	125.2	1
ZK11-1-379 m-29	111.39	20 459	9.51	0.564 6	0.070 0	0.006 2	0.000 1	125.6	1
ZK11-1-379 m-31	163.49	29 910	24.16	0.321 7	0.033 2	0.006 3	0.000 1	126.7	2
ZK11-1-379 m-32	292.56	54 666	21.20	0.534 3	0.033 1	0.006 1	0.000 1	123.8	1
ZK11-1-379 m-33	90.64	16 301	21.14	0.700 7	0.046 2	0.006 3	0.000 1	126.7	2
ZK11-1-379 m-34	119.21	21 803	18.15	0.746 1	0.042 6	0.006 2	0.000 1	124.9	1
ZK11-1-379 m-36	86.29	16 001	5.71	0.864 2	0.094 1	0.006 1	0.000 1	123.6	1
ZK11-1-628 m-06	154.70	28 199	25.34	0.619 7	0.036 0	0.006 2	0.000 1	124.3	1
ZK11-1-628 m-07	121.40	22 632	86.35	0.214 9	0.013 1	0.006 1	0.000 1	122.1	1
ZK11-1-628 m-08	164.29	30 261	57.80	0.123 9	0.011 1	0.006 2	0.000 1	124.3	1
ZK11-1-628 m-12	121.90	22 711	18.43	0.509 6	0.044 1	0.006 1	0.000 1	122.6	1
ZK11-1-628 m-17	101.47	18 694	16.02	0.241 9	0.026 6	0.006 3	0.000 1	125.9	1
ZK11-1-628 m-19	129.40	24 081	25.87	0.371 1	0.042 1	0.006 3	0.000 1	125.8	1
ZK11-1-628 m-20	72.46	13 594	11.42	0.396 0	0.047 0	0.006 3	0.000 1	126.6	1
ZK11-1-628 m-25	85.39	16 227	36.94	0.701 2	0.055 7	0.006 1	0.000 1	122.1	1
ZK11-1-628 m-29	107.05	21 539	18.44	0.818 8	0.082 9	0.006 0	0.000 1	120.4	1
ZK11-1-628 m-32	93.06	17 772	68.23	0.281 3	0.021 7	0.006 1	0.000 1	122.9	1
ZK11-1-628 m-34	78.60	14 962	16.45	0.598 4	0.063 0	0.006 2	0.000 1	125.1	1
ZK11-1-628 m-35	110.10	21 089	89.53	0.116 7	0.012 2	0.006 1	0.000 1	123.1	1

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