福建漳平洛阳铁矿床成岩成矿年代学及其地质意义

张达; 吴淦国; 狄永军; 王长明; 姚继明; 张垚垚; 吕良冀; 袁远; 石建基

doi:10.3799/dqkx.2012.130

福建漳平洛阳铁矿床成岩成矿年代学及其地质意义

doi: 10.3799/dqkx.2012.130

张达^{1, 2,},
吴淦国^{1, 2},
狄永军¹,
王长明¹,
姚继明¹,
张垚垚¹,
吕良冀¹,
袁远¹,
石建基³

1.
中国地质大学地质过程与矿产资源国家重点实验室, 北京 100083
2.
中国地质大学岩石圈构造、深部过程及探测技术教育部重点实验室, 北京 100083
3.
福建省地质矿产勘查开发局, 福建福州 350003

基金项目:

地质调查项目 1212011085472

地质调查项目 1212010533105

地质调查项目 1212010813064

"111"计划 B07011

详细信息

作者简介:
张达(1967-), 男, 教授, 研究生, 主要从事构造地质学及区域成矿规律研究.E-mail: zhangda@cugb.edu.cn

中图分类号: P611.1
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- 文章访问数: 177
- HTML全文浏览量: 100
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2012-07-19
- 网络出版日期: 2021-11-09
- 刊出日期: 2012-06-15

Geochronology of Diagenesis and Mineralization of the Luoyang Iron Deposit in Zhangping City, Fujian Province and Its Geological Significance

1.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
2.
Key Laboratory of Lithospheric Tectonics and Lithoprobing Technology of Ministry of Education, China University of Geosciences, Beijing 100083, China
3.
Bureau of Geology and Mineral Resources of Fujian Province, Fuzhou 350003, China

摘要

摘要: 为了确定闽西南地区铁矿床成矿时代及主要成矿作用特征, 选取洛阳铁矿床开展花岗岩LA-ICP-MS锆石U-Pb同位素测龄及辉钼矿Re-Os同位素年代学研究.结果表明洛阳铁矿床中辉钼矿Re-Os同位素模式年龄为(133.0±1.9)~(134.0±4.2)Ma, 为早白垩世成矿.矿区花岗斑岩结晶年龄为131±1 Ma, 细粒斑状花岗岩结晶年龄为131.64 ±0.62 Ma, 说明岩体都形成于早白垩世.通过对洛阳铁矿床花岗岩、磁铁矿体及辉钼矿体空间分布规律及矿化蚀变特征综合分析, 结合岩体与矿床年代学结果, 可以得出洛阳铁矿床主要形成于早白垩世, 与早白垩世花岗岩岩浆热液接触交代石炭纪碎屑岩-碳酸盐岩地层密切相关.
- Re-Os同位素年龄 /
- LA-ICP-MS锆石U-Pb年代学 /
- 辉钼矿 /
- 洛阳铁矿 /
- 岩石学 /
- 成矿预测 /
- 矿床
Abstract: In order to determine the main mineralization time and ore forming genesis in the southwestern Fujian Province, this paper selects the Luoyang iron deposit to develop the study of LA-ICP-MS zircon U-Pb isotopic dating for granite and Re-Os geochronology for molybdenite from the iron ore body. According to the results, the molybdenite Re-Os isotopic model date is (133.0±1.9) to (134.0±4.2) Ma, which belongs to Early Cretaceous; and LA-ICP-MS zircon U-Pb isotopic dates for the granite porphyry and fine grain porphyritic granite are (131±1) Ma and (131.64 ±0.62) Ma respectively, which is very close to the mineralization time achieved by the Re-Os isotopic dating. According to the analysis of the granites, spatial distribution of magnetite and molybdenite ore bodies, and the mineralization and alteration characteristics, combining with the above granite and deposit chronological data, it is suggested that the Luoyang iron deposit mainly formed at Early Cretaceous when the contact thermofluid metasomatism occurred between the Early Cretaceous granites and the Carboniferous clastic and carbonate strata.
- Re-Os isotopic age /
- LA-ICP-MS zircon U-Pb isotopic dating /
- molybdenite /
- Luoyang iron deposit /
- petrology /
- ore prospecting /
- ore deposits

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图 1 福建漳平洛阳铁矿床地质略图(据闽东南地质大队, 1982, 洛阳剑斗地域1:5万区域地质矿产调查报告修改)

1.南园组；2.文宾山组；3.溪口组；4.翠屏山组；5.童子岩组；6.文笔山组；7.栖霞组；8.船山组；9.林地组；10.矽卡岩；11.铁矿；12.整合界线/不整合界线；13.中细粒斑状花岗岩；14.花岗斑岩；15.背斜；16.岩层产状；17.正断层；18.推测断层

Fig. 1. Luoyang iron deposit in Zhangping City, Fujian Province

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图 2 福建漳平洛阳铁矿床8线勘查剖面图(据闽东南地质大队, 1984, 福建省漳平且洛阳铁矿南段详细勘探暨矿区普查地质报告修改)

FeM₁.磁铁矿富矿；FeMS.含硫磁铁矿；FeMS(Mo).含钼磁铁矿；FeMS(Zn).含锌磁铁矿；Zn.锌矿；C₁l.林地组；P₁q-C₃c.栖霞组-船山组；Skg.石榴子石矽卡岩；Skdg.透辉石矽卡岩；γπ.花岗斑岩；Q.第四纪覆盖层

Fig. 2. Geological section map of No.8 exploration line of the Luoyang iron deposit in Zhangping City, Fujian Province

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图 3 福建漳平洛阳铁矿床矿物组合

a.粒状结构磁铁矿(Mt)；b.磁铁矿(Mt)、黄铜矿(Ccp)及磁黄铁矿(Po)共生产出；c.辉钼矿(Mo)、磁铁矿(Mt)及方解石(Cal)共生；d.辉钼矿(Mo)位于磁铁矿(Mt)与方解石(Cal)接触部位

Fig. 3. Mineral assemblages of the Luoyang iron deposit in Zhangping City, Fujian Province

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图 4 洛阳铁矿区中细粒斑状花岗岩(a)及花岗斑岩(b)锆石CL图像(圆圈代表分析点位)

Fig. 4. CL images for zircons from the medium-fine grain porphyry granite (a) and granite porphyry (b) of the Luoyang iron deposit

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图 5 洛阳铁矿区中细粒斑状花岗岩(a)及花岗斑岩(b)锆石U-Pb谐和图

Fig. 5. U-Pb concordia diagram for zircons from the medium-fine grain porphyry granite (a) and granite porphyry (b) of the Luoyang iron deposit

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图 6 福建漳平洛阳铁矿床成矿过程示意(据闽东南地质大队, 1982, 洛阳剑斗地区1:5万区域地质矿产调查报告修改)

1.南园组；2.文宾山组；3.溪口组；4.翠屏山组；5.童子岩组；6.文笔山组；7.栖霞组；8.船山组；9.林地组；10.中细粒斑状花岗岩；11.花岗斑岩；12.矽卡岩；13.铁(钼、锌)矿体；14.切层断裂及顺层断裂

Fig. 6. Mineralization process of the Luoyang iron deposit in Zhangping City, Fujian Province

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表 1 漳平洛阳铁矿床辉钼矿的Re-Os同位素测定(×10^-9)

Table 1. Re-Os isotopic data of molybdenite from the Luoyang iron deposit in Zhangping City

样品编号	Re		普Os		¹⁸⁷Re		¹⁸⁷Os		模式年龄(Ma)
样品编号	测定值	不确定度	测定值	不确定度	测定值	不确定度	测定值	不确定度	测定值	不确定度
B128	29 420	0.23	0.506 1	0.044 4	18 490	0.150	41.02	0.35	133.0	1.9
B129	82 160	1.05	0.164 0	0.014 2	51 640	0.660	114.60	1.00	133.1	2.3
B134	14 450	0.21	0.834 4	0.296 8	9 081	0.135	20.29	0.53	134.0	4.2

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表 2 洛阳铁矿区中细粒花岗岩及花岗斑岩锆石U-Pb同位素LA-MC-ICP-MS分析结果

Table 2. LA-MC-ICP-MSU-Pb lsotopic data for zircons from mediun-grained granite and granite porphyry granite porphyry of the Luoyang iron deposit

样品点号	含量		同位素比值															年龄(Ma)
样品点号	Pb	U	²⁰⁶Pb/²³⁸U	1σ	err	²⁰⁷Pb/²³⁵U	1σ	err	²⁰⁷Pb/²⁰⁶Pb	1σ	err	²⁰⁸Pb/²³²Th	1σ	err	²³²Th/²³⁸U	1σ	err	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ
BL461
1	4	190	0.020 7	0.000 1	0.64	0.141 6	0.008 5	6.03	0.049 6	0.003 0	6.02	0.004 0	0.000 0	1.07	1.002 6	0.005 1	0.50	132	1	134	8	175	141
2	6	228	0.020 6	0.000 1	0.63	0.139 9	0.006 3	4.50	0.049 2	0.002 2	4.41	0.004 7	0.000 0	0.64	1.405 9	0.003 7	0.26	132	1	133	6	156	103
3	5	195	0.020 8	0.000 1	0.66	0.140 3	0.007 7	5.50	0.049 0	0.002 7	5.45	0.005 2	0.000 1	0.99	1.1628	0.001 9	0.16	132	1	133	7	149	128
4	3	117	0.020 8	0.000 2	0.89	0.140 9	0.014 9	10.60	0.049 1	0.005 2	10.60	0.006 1	0.000 1	1.43	1.274 9	0.016 0	1.26	133	1	134	14	151	248
5	7	225	0.020 8	0.000 2	0.78	0.140 7	0.007 1	5.01	0.049 0	0.002 5	5.05	0.006 7	0.000 0	0.46	2.159 9	0.021 4	0.99	133	1	134	7	148	118
6	6	232	0.020 8	0.000 2	0.77	0.140 0	0.007 8	5.56	0.048 8	0.002 6	5.39	0.007 2	0.000 1	0.81	1.132 1	0.011 8	1.04	133	1	133	7	138	127
7	4	154	0.020 7	0.000 2	0.91	0.141 5	0.011 1	7.85	0.049 6	0.003 9	7.82	0.007 1	0.0001	1.52	0.998 9	0.005 5	0.55	132	1	134	11	174	182
8	3	136	0.020 8	0.000 2	0.89	0.141 0	0.011 7	8.27	0.049 3	0.004 0	8.09	0.007 3	0.000 1	1.39	1.073 3	0.003 0	0.28	132	1	134	11	160	189
9	6	226	0.020 5	0.000 1	0.72	0.137 6	0.006 5	4.75	0.048 8	0.002 3	4.70	0.006 6	0.000 1	0.88	1.078 4	0.009 2	0.86	131	1	131	6	138	110
10	6	242	0.020 2	0.000 1	0.72	0.137 7	0.007 0	5.12	0.049 4	0.002 5	4.99	0.006 0	0.000 1	0.88	1.033 3	0.004 3	0.42	129	1	131	7	167	117
11	12	446	0.021 0	0.000 1	0.69	0.140 7	0.004 1	2.90	0.048 7	0.001 4	2.83	0.006 5	0.000 0	0.64	1.264 2	0.002 7	0.21	134	1	134	4	131	67
12	3	128	0.020 7	0.000 2	1.14	0.139 5	0.014 4	10.31	0.048 8	0.004 9	10.06	0.006 4	0.000 2	2.69	0.765 2	0.002 1	0.28	132	2	133	14	139	236
13	4	173	0.020 7	0.000 2	0.81	0.142 0	0.008 1	5.71	0.049 7	0.002 8	5.71	0.006 2	0.000 1	0.92	1.172 5	0.007 9	0.67	132	1	135	8	179	133
14	11	427	0.020 8	0.000 2	0.89	0.142 0	0.004 3	3.03	0.049 5	0.001 4	2.91	0.006 5	0.000 0	0.64	1.214 2	0.007 8	0.64	133	1	135	4	173	68
15	8	299	0.020 7	0.000 2	0.74	0.138 4	0.005 8	4.20	0.048 6	0.002 0	4.18	0.006 4	0.000 0	0.56	1.430 3	0.008 5	0.60	132	1	132	6	126	98
16	5	253	0.020 1	0.000 2	1.09	0.137 2	0.014 3	10.40	0.049 6	0.004 7	9.50	0.007 3	0.000 1	1.82	0.316 9	0.002 7	0.86	128	1	131	14	174	222
17	5	162	0.020 8	0.000 2	0.78	0.140 8	0.011 0	7.83	0.049 1	0.003 8	7.70	0.007 7	0.000 1	0.94	1.396 9	0.011 3	0.81	133	1	134	10	150	180
18	6	228	0.020 3	0.000 2	0.77	0.137 6	0.006 3	4.57	0.049 1	0.002 3	4.58	0.006 9	0.000 0	0.65	1.510 4	0.022 5	1.49	130	1	131	6	152	107
19	8	420	0.020 7	0.000 1	0.64	0.139 4	0.004 4	3.16	0.048 8	0.001 5	3.08	0.007 1	0.000 0	0.58	0.062 8	0.000 7	1.07	132	1	132	4	136	72
20	4	173	0.020 1	0.000 1	0.74	0.138 2	0.009 2	6.62	0.049 7	0.003 3	6.61	0.006 8	0.000 1	1.44	0.881 0	0.008 5	0.96	129	1	131	9	183	154
21	5	224	0.020 6	0.000 2	0.85	0.138 6	0.007 6	5.49	0.048 7	0.002 6	5.34	0.006 7	0.000 1	1.06	0.907 8	0.0021	0.23	132	1	132	7	133	126
22	5	205	0.020 5	0.000 2	0.78	0.140 1	0.007 8	5.56	0.049 5	0.002 8	5.55	0.006 7	0.000 1	0.99	1.216 5	0.012 3	1.01	131	1	133	7	173	130
23	12	468	0.020 8	0.000 2	0.75	0.141 5	0.003 6	2.51	0.049 3	0.001 2	2.39	0.006 4	0.000 0	0.59	1.113 5	0.003 8	0.34	133	1	134	3	161	56
24	7	282	0.020 4	0.000 2	0.78	0.140 2	0.005 6	3.99	0.049 8	0.001 9	3.86	0.006 6	0.000 1	0.80	1.108 2	0.009 1	0.82	130	1	133	5	184	90
LY1407-3
1	7.983 8	317.391 3	0.020 18	0.000 1	0.684 8	0.137 2	0.003 1	2.265 7	0.049 3	0.001 0	2.103 5	0.006 6	0.000 2	2.818 0	1.188 9	0.007 5	0.630 4	128.780 8	0.881 9	130.560 3	2.958 1	163.067 4	3.430 0
2	9.509 8	353.079 9	0.020 66	0.000 1	0.674 3	0.143 4	0.002 2	1.526 6	0.050 4	0.000 8	1.532 4	0.007 3	0.000 2	2.889 1	1.280 3	0.013 5	1.054 1	131.803 6	0.888 8	136.108 8	2.077 8	211.887 4	3.247 0
3	3.909 0	154.566 3	0.020 71	0.000 1	0.723 3	0.138 3	0.004 5	3.239 7	0.048 4	0.001 5	3.188 7	0.006 8	0.000 2	2.841 2	1.086 8	0.004 2	0.383 0	132.144 8	0.955 7	131.559 0	4.262 1	120.992 4	3.858 1
4	6.093 4	247.768 9	0.020 17	0.000 1	0.684 7	0.136 5	0.003 6	2.663 7	0.049 1	0.001 3	2.574 5	0.006 8	0.000 2	2.882 9	1.055 9	0.004 0	0.381 6	128.761 3	0.881 7	129.877 5	3.459 5	150.349 4	3.870 8
5	7.926 0	307.188 9	0.020 52	0.000 1	0.648 6	0.141 2	0.002 7	1.932 1	0.049 9	0.000 9	1.892 9	0.007 0	0.000 2	2.783 6	1.171 9	0.005 9	0.503 7	130.938 5	0.849 3	134.101 7	2.591 0	190.496 5	3.605 8
6	7.081 8	263.272 7	0.020 46	0.000 1	0.730 0	0.139 5	0.002 0	1.442 4	0.049 5	0.000 7	1.390 8	0.007 4	0.000 2	2.835 7	1.277 4	0.006 0	0.469 7	130.535 0	0.952 9	132.572 7	1.912 2	169.240 7	2.353 7
7	4.077 9	168.532 3	0.020 34	0.000 1	0.649 6	0.139 9	0.008 5	6.062 9	0.049 9	0.003 0	5.967 0	0.005 8	0.000 2	2.903 7	1.121 2	0.004 8	0.424 5	129.793 2	0.843 1	132.912 8	8.058 3	189.032 6	11.279 5
8	3.164 9	117.895 1	0.020 37	0.000 2	0.769 6	0.138 6	0.007 1	5.087 4	0.049 3	0.002 4	4.918 9	0.006 8	0.000 2	2.881 8	1.398 8	0.006 5	0.463 3	130.024 4	1.000 7	131.815 0	6.705 9	164.209 1	8.077 3
9	2.935 3	118.925 9	0.020 36	0.000 2	0.905 9	0.138 3	0.013 7	9.929 5	0.049 3	0.004 7	9.591 5	0.006 3	0.000 2	2.983 1	1.124 7	0.008 3	0.738 7	129.959 9	1.177 3	131.523 2	13.059 6	159.854 5	15.332 5
10	5.476 9	216.685 8	0.020 63	0.000 1	0.685 9	0.142 1	0.004 6	3.214 7	0.050 0	0.001 7	3.329 0	0.006 2	0.000 2	2.801 8	1.194 7	0.007 0	0.582 0	131.628 4	0.902 8	134.923 8	4.337 4	193.325 4	6.435 8
11	12.194 8	444.196 8	0.020 45	0.000 1	0.662 1	0.139 9	0.002 5	1.814 4	0.049 6	0.000 9	1.802 1	0.006 2	0.000 2	2.779 6	1.637 9	0.013 1	0.798 2	130.510 0	0.864 1	132.951 7	2.412 3	176.799 3	3.186 2
12	7.600 8	255.751 6	0.020 83	0.000 1	0.653 1	0.139 4	0.006 6	4.702 4	0.048 5	0.002 3	4.675 6	0.005 9	0.000 2	2.788 6	2.105 0	0.008 6	0.407 4	132.895 1	0.868 0	132.520 9	6.231 7	125.818 9	5.882 8
13	4.831 1	194.891 7	0.020 57	0.000 1	0.711 0	0.137 7	0.007 1	5.178 8	0.048 6	0.002 5	5.091 0	0.006 0	0.000 2	2.912 6	1.164 5	0.007 4	0.637 9	131.226 9	0.933 0	131.007 4	6.784 7	127.030 1	6.467 1
14	4.457 1	146.405 9	0.020 95	0.000 2	1.140 3	0.143 0	0.006 4	4.457 8	0.049 5	0.001 7	3.354 4	0.009 6	0.000 4	3.794 8	1.365 8	0.005 7	0.415 2	133.627 1	1.523 7	135.743 4	6.051 2	172.927 0	5.800 7
15	15.704 5	621.633 6	0.020 18	0.000 1	0.645 7	0.137 6	0.002 1	1.495 6	0.049 5	0.000 6	1.203 6	0.006 0	0.000 2	2.800 5	1.315 0	0.005 1	0.389 2	128.796 7	0.831 6	130.942 3	1.958 4	170.050 2	2.046 8
16	5.923 7	246.861 6	0.020 69	0.000 1	0.701 4	0.142 1	0.007 1	4.966 6	0.049 8	0.002 5	5.051 8	0.005 7	0.000 2	2.890 0	1.039 2	0.021 0	2.021 5	132.042 1	0.926 1	134.936 4	6.701 8	186.181 0	9.405 5
17	8.193 5	307.801 6	0.020 65	0.000 1	0.660 5	0.138 2	0.004 2	3.056 6	0.048 5	0.001 4	2.978 2	0.005 5	0.000 2	2.812 9	1.626 8	0.006 9	0.423 7	131.750 9	0.870 2	131.456 6	4.018 2	126.141 3	3.756 7
19	3.811 6	157.429 3	0.020 37	0.000 1	0.726 1	0.140 7	0.005 6	3.994 0	0.050 1	0.001 9	3.778 4	0.006 0	0.000 2	2.872 2	1.090 6	0.008 6	0.784 9	130.002 8	0.944 0	133.628 2	5.337 1	198.560 8	7.502 3
20	4.623 4	176.250 0	0.020 61	0.000 1	0.696 5	0.143 2	0.005 8	4.015 3	0.050 4	0.002 0	3.871 8	0.006 1	0.000 2	2.841 3	1.403 5	0.011 6	0.829 8	131.537 7	0.916 2	135.898 3	5.456 8	212.782 3	8.238 6
21	4.910 8	175.435 9	0.021 18	0.000 2	0.715 9	0.142 3	0.006 5	4.556 9	0.048 7	0.001 9	3.858 9	0.006 6	0.000 2	3.310 1	1.518 0	0.009 3	0.611 7	135.134 5	0.967 5	135.067 7	6.154 8	133.893 4	5.166 8
22	3.826 4	152.263 7	0.020 49	0.000 2	0.773 8	0.138 3	0.007 3	5.258 9	0.048 9	0.002 6	5.231 0	0.005 6	0.000 2	2.988 7	1.329 7	0.007 1	0.537 5	130.770 3	1.011 9	131.522 5	6.916 6	145.129 9	7.591 7
23	7.430 5	308.083 7	0.020 75	0.000 1	0.653 8	0.142 0	0.004 4	3.117 6	0.049 6	0.001 6	3.129 7	0.005 5	0.000 2	2.858 9	1.096 9	0.012 3	1.122 2	132.396 5	0.865 7	134.819 7	4.203 1	177.720 9	5.562 1
24	6.002 3	240.987 9	0.020 81	0.000 2	0.787 3	0.142 2	0.006 2	4.356 0	0.049 6	0.002 0	3.967 0	0.005 9	0.000 2	3.061 4	1.155 7	0.007 6	0.657 4	132.748 3	1.045 2	134.991 9	5.880 2	174.645 9	6.928 2
25	6.535 4	257.026 4	0.020 35	0.000 2	1.055 2	0.141 6	0.009 7	6.829 6	0.050 5	0.002 8	5.561 9	0.006 0	0.000 2	3.723 3	1.312 6	0.006 1	0.467 3	129.876 0	1.370 5	134.461 9	9.183 2	216.243 3	12.027 3
26	18.001 7	638.967 1	0.020 68	0.000 1	0.612 5	0.140 0	0.002 3	1.635 8	0.049 1	0.000 8	1.665 7	0.005 3	0.000 1	2.777 0	2.012 8	0.009 4	0.467 4	131.965 2	0.808 2	133.033 8	2.176 2	152.155 8	2.534 5
27	5.454 7	218.117 2	0.020 64	0.000 2	0.739 9	0.139 9	0.004 4	3.116 2	0.049 2	0.001 5	3.145 7	0.005 3	0.000 2	2.847 2	1.347 4	0.014 5	1.075 0	131.684 2	0.974 4	132.943 4	4.142 8	155.500 9	4.891 6
28	2.834 1	111.842 7	0.020 72	0.000 2	0.770 6	0.139 5	0.009 3	6.692 9	0.048 8	0.003 3	6.811 4	0.009 3	0.000 3	3.104 9	0.800 4	0.003 4	0.427 5	132.232 4	1.018 9	132.606 5	8.875 3	139.313 2	9.489 2
29	4.619 1	179.408 2	0.021 04	0.000 1	0.657 5	0.145 7	0.006 3	4.310 7	0.050 2	0.002 1	4.206 0	0.009 3	0.000 3	3.064 1	0.815 2	0.007 4	0.903 2	134.228 3	0.882 5	138.101 6	5.953 2	205.212 6	8.631 2
31	3.129 8	125.619 0	0.020 80	0.000 2	1.058 0	0.139 5	0.016 2	11.641 3	0.048 7	0.004 6	9.367 2	0.007 6	0.000 7	9.479 1	0.905 6	0.004 5	0.500 8	132.681 9	1.403 8	132.634 4	15.440 3	131.783 7	12.344 4
32	3.468 8	142.346 2	0.020 47	0.000 2	0.742 9	0.141 2	0.006 0	4.262 5	0.050 0	0.001 9	3.888 4	0.006 8	0.000 2	2.999 0	0.968 9	0.006 6	0.678 2	130.613 3	0.970 4	134.144 1	5.717 9	197.119 5	7.664 9
注: 表中所列误差均为1σ; l~17, 19~29.31~32号共30点; ²⁰⁶Pb/²³⁸U表面年龄加权平均值为131±1 Ma; 3, 18.30号点测试异常已删去; err单位为%.

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