闽西南下古生界东坑口组与魏坊组地层层序与物源区特征——来自碎屑锆石LA-ICP-MSU-Pb测年的约束

肖爱芳; 黎敦朋

闽西南下古生界东坑口组与魏坊组地层层序与物源区特征——来自碎屑锆石LA-ICP-MSU-Pb测年的约束

福州大学紫金矿业学院, 福建福州 350108

基金项目:

福建省自然科学基金项目《福建西部早古生代地层层序的碎屑锆石LA-ICP-MSU-Pb测年的约束》 2014J01157

详细信息

作者简介:
肖爱芳(1969-), 女, 硕士, 副教授, 从事地理信息系统教学与年代学等研究。E-mail:xaf@fzu.edu.cn

中图分类号: P539.2;P597⁺.3
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出版历程
- 收稿日期: 2016-07-15
- 修回日期: 2017-06-11
- 网络出版日期: 2023-08-15
- 刊出日期: 2017-09-30

Stratigraphic sequence and characteristics of the source area of Lower Paleozoic Weifang Formation and Dongkengkou Formation in southwestern Fujian:Constraints from detrital zircon LA-ICP-MS U-Pb dating

College of Zijin Mining, Fuzhou University, Fuzhou 350108, Fujian, China

摘要

摘要:
闽西南地区下古生界魏坊组与东坑口组地层层序长期以来一直存在争议。应用LA-ICP-MS U-Pb测年，对闽西南地区下古生界魏坊组与东坑口组进行了120颗碎屑锆石的U-Pb测年，获得锆石年龄范围为506~3431Ma，主要分布于511~2796Ma之间，主要峰值年龄为964Ma，次要峰值年龄为514Ma，并存在813Ma、1231Ma、2483Ma的次级峰。年龄谱特征显示，魏坊组沉积早于东坑口组，东坑口组时代不属于中上寒武世。下古生界物源以964Ma峰值为代表，反映Grenville构造热事件的物源最显著。还获得了较丰富的峰值年龄为514Ma的泛非期构造热事件年龄，以及古太古代锆石年龄记录，为闽西南地区下古生界地层层序的确立和物源研究提供了重要新资料。
- 地层层序 /
- 魏坊组 /
- 东坑口组 /
- 碎屑锆石 /
- LA-ICP-MS U-Pb测年
Abstract:
The stratigraphic sequence of Lower Paleozoic Weifang Formation and Dongkengkou Formation in southwestern Fujian has long been a problem of controversy. In this paper, the authors studied geochronology of 120 detrital zircon samples from the Lower Paleozoic Weifang Formation and Dongkengkou Formation sedimentary rocks in southwestern Fujian by LA-ICP-MS U-Pb dating, and obtained zircon ages ranging from 506Ma to 3431Ma, with most of the data from 511Ma to 2796Ma, the main peak value 964Ma, a secondary peak value 514Ma, and secondary peak values 813Ma, 1231Ma, 2483Ma. Characteristics of the age spectrum suggest that Weifang Formation was deposited earlier than Dongkengkou Formation. Age of Dongkengkou Formation does not belong to MiddleUpper Cambrian. Lower Paleozoic source with peak value at 964Ma most significantly reflects the Grenville tectonic event. The authors also received peak value age of 514Ma of Pan-African tectonic event. In addition, the authors found Paleoarchean zircon ages record. Important new information is thus provided for the establishment of Lower Paleozoic stratigraphic sequence; source studies.
- stratigraphic sequence /
- Weifang Formation /
- Dongkengkou Formation /
- detrital zircon /
- LA-ICP-MS U-Pb dating

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致谢: 感谢审稿专家对本文提出的宝贵修改建议，感谢西北大学大陆动力学国家重点实验室在锆石电镜、CL照相及测年过程中给予的大力帮助与支持。

图 1 闽西南区域地质简图与样品位置

a－研究区构造位置简图；b－永安地区区域地质图②；c－魏坊地区区域地质图③。①－长乐-南澳断裂；②－政和-大埔断裂；③－宁化-南平断裂；④－邵武-海丰断裂；1－上白垩统沙县组-崇安组；2－上侏罗统南园组；3－上泥盆统桃子坑组-下三叠统溪口组；4－上奥陶统罗峰溪组；5－中奥陶统东坑口组；6－下奥陶统魏坊组；7－中-古生代花岗岩；8－断层；9－角度不整合接触；10－笔石化石产地；11－锆石U-Pb测年采样位置；12－中上奥陶统罗峰溪群；13－下奥陶统魏坊组；14－上寒武统东坑口组；15－下中寒武统林田组

Figure 1. Regional geological map and sampling sites in southwestern Fujian

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图 2 碎屑锆石阴极发光图像及年龄

Figure 2. Detrital zircons cathodoluminescence photos and ages

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图 3 测年结果谐和图

Figure 3. Concordia diagrams of dating results

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图 4 测年结果频率直方图与年龄谱图

Figure 4. Frequency histograms and age spectrum of U-Pb dating results

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表 1 福建下古生界地层划分沿革

Table 1 Lower Paleozoic strata division history of Fujian

地质年代		1:20万永安幅区调(1965)^①		福建区调队(1982)^②李兼海等(1983)^[4]		1:5万贡川幅、安砂幅区调(1988)^③朱玉磷等(1989)^[5]	福建省地矿局(1997)^[3]		本文
志留系	上统中统	罗峰溪群	第八段
	中统		第八段
	下统		第七段						罗峰溪组
奥陶系	上统		第六段	罗峰溪群	上段	罗峰溪组	罗峰溪组	上段	罗峰溪组
	中统		第五段	罗峰溪群	下段	东坑口组	罗峰溪组	下段	东坑口组
	下统		第四段	魏坊群		魏坊组	魏坊组		魏坊组
寒武系	上统		第三段	东坑口群		林田组	东坑口组		林田组
	中统		第二段	林田组	上段		林田组
	下统		第一段	林田组	下段		林田组

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表 2 魏坊组碎屑锆石(S401)U-Th-Pb测年结果

Table 2 U-Th-Pb dating results of detrital zircons from Weifang Formation (S401)

样品号与测点	²³²Th/10^-6	²³⁸U/10^-6	Th/U	Pb^*/10^-6	²⁰⁷Pb/²⁰⁶pb		²⁰⁶Pb/²³⁸U		²⁰⁷Pb/²³⁵U		²⁰⁷Pb/²⁰⁶Pb		²⁰⁶Pb/²³⁸U		²⁰⁷Pb/²³⁵U		谐和度
样品号与测点	²³²Th/10^-6	²³⁸U/10^-6	Th/U	Pb^*/10^-6	比值	1σ	比值	1σ	比值	1σ	年龄/Ma	1σ	年龄/ Ma	1σ	年龄/ Ma	1σ	谐和度
401-01	811.2	1358.6	0.60	25.0	0.0854	0.0018	0.2070	0.0019	2.4401	0.0296	1324.9	41.3	1212.8	10.2	1254.5	8.7	103
401-02	544.4	1401.3	0.39	24.8	0.0923	0.0019	0.2573	0.0023	3.2772	0.0315	1473.7	38.1	1475.8	11.6	1475.7	7.5	100
401-03	393.7	973.3	0.40	37.5	0.0739	0.0063	0.1749	0.0048	1.7837	0.1475	1039.1	162.6	1038.9	26.3	1039.5	53.8	100
401-04	361.1	748.5	0.48	28.6	0.2798	0.0056	0.6627	0.0059	25.5875	0.2310	3361.9	30.8	3277.6	22.8	3330.9	8.8	102
401-05	117.5	137.9	0.85	25.1	0.0661	0.0022	0.1296	0.0015	1.1820	0.0324	809.6	67.5	785.5	8.8	792.2	15.1	101
401-06	104.7	236.3	0.44	29.0	0.1819	0.0038	0.4996	0.0048	12.5372	0.1373	2669.8	34.0	2612.3	20.8	2645.5	10.3	101
401-07	573.7	424.3	1.35	24.6	0.0965	0.0022	0.2729	0.0027	3.6354	0.0487	1558.2	41.3	1555.6	13.4	1557.3	10.7	100
401-08	57.6	58.5	0.98	27.1	0.0638	0.0040	0.1204	0.0024	1.0599	0.0629	735.0	127.5	732.9	13.8	733.8	31.0	100
401-09	125.5	394.7	0.32	28.6	0.1282	0.0029	0.3475	0.0035	6.1474	0.0824	2073.8	38.6	1922.4	16.9	1997.0	11.7	104
401-10	187.8	101.4	1.85	24.3	0.0593	0.0025	0.0826	0.0011	0.6761	0.0254	579.4	89.0	511.5	6.5	524.4	15.4	103
401-11	213.1	1082.3	0.20	47.3	0.1392	0.0049	0.3986	0.0076	7.6565	0.2420	2217.4	59.6	2162.7	35.2	2191.5	28.4	101
401-12	127.9	1153.8	0.11	24.6	0.0655	0.0014	0.1332	0.0012	1.2044	0.0142	791.4	44.5	806.2	6.8	802.6	6.5	100
401-13	106.5	145.0	0.73	35.2	0.0858	0.0071	0.0999	0.0028	1.1814	0.0930	1332.7	151.5	613.5	16.5	791.9	43.3	129
401-14	286.2	462.1	0.62	24.4	0.0704	0.0016	0.1565	0.0015	1.5200	0.0219	940.7	46.8	937.0	8.2	938.5	8.8	100
401-15	97.1	169.1	0.57	29.9	0.1686	0.0037	0.4668	0.0050	10.8578	0.1447	2544.0	36.6	2469.3	21.9	2511.0	12.4	102
401-16	159.8	424.0	0.38	24.8	0.0614	0.0017	0.0986	0.0010	0.8345	0.0174	652.2	58.5	606.0	5.9	616.1	9.6	102
401-17	40.3	125.4	0.32	31.0	0.1718	0.0037	0.4746	0.0049	11.2443	0.1404	2574.7	35.8	2503.7	21.4	2543.6	11.7	102
401-18	265.4	508.4	0.52	26.1	0.0962	0.0022	0.2540	0.0025	3.3721	0.0463	1552.5	42.0	1459.1	12.7	1497.9	10.7	103
401-19	100.9	634.0	0.16	25.4	0.0703	0.0016	0.1556	0.0014	1.5079	0.0199	935.7	45.4	932.3	8.0	933.6	8.1	100
401-20	559.3	954.1	0.59	24.7	0.0735	0.0017	0.1676	0.0016	1.6999	0.0229	1028.3	45.1	999.0	8.6	1008.5	8.6	101
401-21	168.1	99.1	1.70	25.4	0.0700	0.0029	0.1533	0.0022	1.4797	0.0539	928.2	81.9	919.2	12.4	922.1	22.1	100
401-22	87.8	75.1	1.19	27.0	0.0965	0.0027	0.2654	0.0032	3.5329	0.0768	1557.5	52.0	1517.5	16.4	1534.6	17.2	101
401-23	499.0	399.9	1.25	26.9	0.1603	0.0033	0.4482	0.0041	9.9093	0.1008	2458.7	34.6	2387.2	18.3	2426.4	9.4	102
401-24	85.1	139.2	0.61	30.9	0.1964	0.0044	0.5363	0.0060	14.5301	0.1987	2796.7	36.0	2767.9	25.1	2785.0	13.0	101
401-25	130.1	181.3	0.72	34.6	0.2927	0.0075	0.6352	0.0109	25.6408	0.5335	3431.9	39.3	3170.0	42.9	3332.9	20.3	105
401-26	236.8	269.4	0.88	23.7	0.0576	0.0018	0.0831	0.0009	0.6597	0.0165	512.8	67.6	514.6	5.3	514.4	10.1	100
401-27	155.0	84.9	1.83	25.2	0.0578	0.0047	0.0834	0.0018	0.6651	0.0522	523.6	170.2	516.2	10.9	517.7	31.9	100
401-28	89.7	166.0	0.54	26.2	0.0752	0.0021	0.1773	0.0020	1.8377	0.0398	1072.7	56.1	1052.1	10.8	1059.0	14.3	101
401-29	344.6	793.5	0.43	24.5	0.0673	0.0015	0.1290	0.0012	1.1964	0.0157	845.8	46.2	782.1	6.7	798.9	7.3	102
401-30	262.8	438.5	0.60	24.4	0.0713	0.0017	0.1621	0.0015	1.5934	0.0233	965.1	47.2	968.5	8.5	967.6	9.1	100
401-31	185.9	315.4	0.59	25.2	0.0686	0.0019	0.1473	0.0016	1.3927	0.0291	886.1	56.7	885.5	8.8	885.8	12.4	100
401-32	52.7	91.9	0.57	30.6	0.1754	0.0040	0.5007	0.0056	12.1115	0.1722	2609.9	37.4	2616.7	24.0	2613.1	13.3	100
401-33	316.4	102.9	3.07	29.7	0.1482	0.0049	0.4175	0.0075	8.5348	0.2433	2325.6	55.0	2249.2	33.9	2289.6	25.9	102
401-34	508.0	1120.5	0.45	32.4	0.1616	0.0040	0.4379	0.0052	9.7563	0.1598	2472.2	40.2	2341.0	23.5	2412.0	15.1	103
401-35	525.6	1112.5	0.47	26.2	0.1657	0.0035	0.4539	0.0043	10.3714	0.1115	2514.7	35.2	2412.3	18.9	2468.5	10.0	102
401-36	161.7	109.5	1.48	28.5	0.1655	0.0040	0.4759	0.0055	10.8622	0.1683	2512.8	39.1	2509.3	24.2	2511.4	14.4	100
401-37	346.8	592.0	0.59	24.6	0.0727	0.0017	0.1650	0.0015	1.6544	0.0225	1005.8	45.9	984.6	8.5	991.2	8.6	101
401-38	362.6	507.7	0.71	24.3	0.0721	0.0017	0.1684	0.0016	1.6730	0.0235	987.6	46.5	1003.1	8.7	998.3	8.9	100
401-39	34.1	77.0	0.44	27.0	0.0661	0.0026	0.1344	0.0018	1.2250	0.0425	809.7	80.8	812.8	10.2	812.0	19.4	100
401-40	215.1	193.6	1.11	27.0	0.0881	0.0026	0.2221	0.0027	2.6973	0.0608	1383.7	54.9	1293.1	14.0	1327.7	16.7	103
401-41	80.8	89.2	0.91	31.7	0.1748	0.0045	0.4879	0.0066	11.7608	0.2215	2604.3	42.0	2561.5	28.7	2585.5	17.6	101
401-42	43.1	138.1	0.31	31.9	0.1591	0.0036	0.4571	0.0049	10.0269	0.1401	2446.0	38.2	2426.6	21.8	2437.3	12.9	100
401-43	142.4	257.3	0.55	29.4	0.0878	0.0030	0.2223	0.0031	2.6923	0.0776	1379.1	64.3	1293.9	16.3	1326.3	21.4	103
401-44	170.3	641.9	0.27	25.6	0.07400	0.0017	0.1652	0.0016	1.6843	0.0236	1040.4	46.3	985.4	8.6	1002.6	8.9	102
401-45	87.2	201.4	0.43	29.8	0.1891	0.0041	0.5261	0.0052	13.7192	0.1574	2734.5	35.1	2725.0	21.8	2730.5	10.9	100
401-46	671.8	681.7	0.99	23.5	0.0573	0.0017	0.0830	0.0009	0.6558	0.0153	503.8	65.3	513.8	5.2	512.0	9.4	100
401-47	159.2	157.4	1.01	26.2	0.0645	0.0032	0.1261	0.0020	1.1221	0.0513	759.3	101.7	765.5	11.7	764.0	24.5	100
401-48	60.1	49.8	1.21	30.6	0.1600	0.0042	0.4543	0.0061	10.023	0.1935	2455.8	43.5	2414.3	27.0	2436.9	17.8	101
401-49	96.2	172.8	0.56	29.2	0.1026	0.0029	0.2954	0.0036	4.1773	0.0876	1671.2	50.6	1668.3	17.9	1669.6	17.2	100
401-50	106.6	132.8	0.80	26.6	0.0894	0.0024	0.2436	0.0027	3.0032	0.0571	1413.2	50.0	1405.3	13.8	1408.4	14.5	100
401-51	233.1	235.0	0.99	29.2	0.0885	0.0036	0.2268	0.0038	2.7667	0.1018	1392.7	76.9	1317.8	19.9	1346.6	27.4	102
401-52	326.7	190.7	1.71	25.6	0.0598	0.0040	0.0832	0.0016	0.6863	0.0432	597.1	138.1	515.2	9.5	530.6	26.0	103
401-53	138.1	234.4	0.59	25.8	0.0725	0.0020	0.1628	0.0017	1.6277	0.0337	1000.5	55.5	972.3	9.6	981.0	13.0	101
401-54	158.4	317.4	0.50	27.2	0.1153	0.0026	0.3366	0.0032	5.3517	0.0671	1885.0	39.9	1870.1	15.6	1877.2	10.7	100
401-55	352.0	1165.1	0.30	24.1	0.0622	0.0014	0.1010	0.0009	0.8658	0.0117	679.6	48.8	620.4	5.4	633.3	6.4	102
401-56	185.8	262.2	0.71	26.8	0.1075	0.0025	0.3045	0.0030	4.5132	0.0598	1757.5	41.2	1713.5	14.6	1733.4	11.0	101
401-57	194.4	406.6	0.48	25.8	0.0741	0.0019	0.1705	0.0017	1.7413	0.0312	1043.2	51.6	1015.0	9.5	1024.0	11.6	101
401-58	123.0	345.8	0.36	26.3	0.0719	0.0020	0.1526	0.0016	1.5120	0.0230	982.1	54.8	915.5	8.9	935.3	12.1	102
401-59	368.9	579.1	0.64	24.2	0.0622	0.0020	0.1120	0.0012	0.9594	0.0242	679.5	66.1	684.1	6.8	683.0	12.5	100
401-60	539.5	586.7	0.92	25.6	0.0758	0.0022	0.1696	0.0019	1.7720	0.0393	1089.0	57.4	1010.0	10.4	1035.2	14.4	102
注：Pb^为放射性成因铅(Pb^=0.241^²⁰⁶Pb+0.221^207Pb+0.524^*208Pb)，谐和度=100×年龄(²⁰⁷Pb/²³⁵U)/年龄(²⁰⁶Pb/²³8U)

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表 3 东坑口组碎屑锆石(S402)U-Th-Pb测年结果

Table 3 U-Th-Pb dating results of detrital zircons from Dongkengkou Formation (S402)

样品号与测点	²³²Th/10^-6	²³⁸U/10^-6	Th/U	Pb^*/10^-6	²⁰⁷Pb/²⁰⁶Pb		²⁰⁶Pb/²³⁸U		²⁰⁷Pb/²³⁵U		²⁰⁷Pb/²⁰⁶Pb		²⁰⁶Pb/²³⁸U		²⁰⁷Pb/²³⁵U		谐和度
样品号与测点	²³²Th/10^-6	²³⁸U/10^-6	Th/U	Pb^*/10^-6	比值	1σ	比值	1σ	比值	1σ	年龄/Ma	1σ	年龄/Ma	1σ	年龄/Ma	1σ	谐和度
402-01	219.4	399.7	0.55	27.0	0.1577	0.0032	0.4495	0.0039	9.7728	0.0864	2430.8	33.8	2392.8	17.3	2413.6	8.1	101
402-02	143.2	835.6	0.17	25.8	0.0789	0.0016	0.1705	0.0015	1.8559	0.0173	1170.7	39.9	1014.7	8.1	1065.5	6.2	105
402-03	133.2	660.1	0.20	24.7	0.0706	0.0015	0.1535	0.0014	1.4937	0.0157	944.9	42.5	920.5	7.5	927.8	6.4	101
402-04	109.5	135.2	0.81	25.7	0.1034	0.0022	0.2890	0.0026	4.1200	0.0424	1685.4	38.0	1636.7	12.9	1658.3	8.4	101
402-05	609.9	480.6	1.27	25.1	0.0988	0.0020	0.2723	0.0024	3.7106	0.0346	1602.1	37.6	1552.4	12.0	1573.7	7.5	101
402-06	196.4	527.6	0.37	26.7	0.1517	0.0031	0.3921	0.0034	8.2014	0.0756	2365.1	34.3	2132.4	15.9	2253.5	8.3	106
402-07	97.9	235.4	0.42	26.6	0.1074	0.0022	0.2870	0.0026	4.2490	0.0440	1755.5	37.7	1626.2	12.9	1683.5	8.5	104
402-08	53.7	111.0	0.48	27.3	0.0757	0.0021	0.1521	0.0017	1.5880	0.0336	1087.0	55.1	912.9	9.2	965.5	13.2	106
402-09	61.4	170.0	0.36	24.8	0.0714	0.0016	0.1574	0.0014	1.5487	0.0196	967.4	44.6	942.3	8.0	950.0	7.8	101
402-10	462. 5	556.0	0.83	23.1	0.0574	0.0013	0.0818	0.0007	0.6474	0.0077	506.7	47.6	506.7	4.3	506.9	4.8	100
402-11	373.1	771.4	0.48	24.5	0.0737	0.0016	0.1682	0.0015	1.7081	0.0194	1031.9	42.7	1002.1	8.3	1011.6	7.3	101
402-12	529.6	608.9	0.87	24.1	0.0764	0.0016	0.1871	0.0016	1.9719	0.0200	1106.7	41.1	1105.5	8.9	1106.0	6.8	100
402-13	457.5	600.0	0.76	24.3	0.0664	0.0017	0.1234	0.0012	1.1304	0.0210	819.2	53.6	750.4	7.1	767.9	10.0	102
402-14	271.8	358.5	0.76	26.1	0.1171	0.0024	0.3280	0.0029	5.2971	0.0508	1912.6	36.4	1828.8	14.1	1868.4	8.2	102
402-15	112.5	1659.6	0.07	27.3	0.0762	0.0017	0.1605	0.0015	1.6852	0.0198	1099.4	42.8	959.3	8.1	1003.0	7.5	105
402-16	141.8	219.5	0.65	24.3	0.0713	0.0016	0.1609	0.0015	1.5829	0.0193	967.1	44.1	961.8	8.1	963.5	7.6	100
402-17	121.9	272.4	0.45	24.6	0.0773	0.0016	0.1932	0.0017	2.0587	0.0226	1128.3	41.8	1138.7	9.3	1135.2	7.5	100
402-18	94.4	452.7	0.21	27.5	0.0773	0.0019	0.1614	0.0016	1.7207	0.0280	1129.8	48.0	964.3	8.9	1016.3	10.4	105
402-19	218.8	534.3	0.41	31.1	0.0817	0.0030	0.1690	0.0024	1.9043	0.0605	1239.4	70.4	1006.3	13.2	1082.6	21.1	108
402-20	88.4	477.0	0.19	24.7	0.0706	0.0015	0.1517	0.0014	1.4762	0.0159	944.6	42.9	910.7	7.5	920.7	6.5	101
402-21	97.6	694.7	0.14	25.4	0.0821	0.0017	0.2124	0.0019	2.4024	0.0229	1246.6	39.6	1241.3	9.9	1243.3	6.8	100
402-22	165.7	254.8	0.65	27.0	0.1821	0.0037	0.5181	0.0046	13.0061	0.1206	2671.7	33.4	2691.1	19.5	2680.1	8.7	100
402-23	350.1	520.9	0.67	27.2	0.1724	0.0035	0.4597	0.0040	10.9253	0.0991	2580.7	33.6	2438.2	17.8	2516.8	8.4	103
402-24	409.0	614.2	0.67	25.6	0.1005	0.0021	0.2677	0.0023	3.7087	0.0344	1632.9	37.5	1529.0	11.9	1573.2	7.4	103
402-25	71.5	307.8	0.23	26.2	0.1123	0.0023	0.3327	0.0030	5.1518	0.0500	1836.8	36.9	1851.5	14.3	1844.7	8.3	100
402-26	120.8	231.5	0.52	24.8	0.0865	0.0018	0.2365	0.0021	2.8198	0.0305	1348.9	40.4	1368.3	11.1	1360.8	8.1	99
402-27	362.6	627.2	0.58	24.2	0.0712	0.0015	0.1506	0.0014	1.4777	0.0165	962.2	43.1	904.2	7.6	921.3	6.8	102
402-28	194.8	571.8	0.34	24.0	0.0705	0.0015	0.1611	0.0014	1.5662	0.0161	943.7	42.3	962.7	7.9	956.9	6.4	99
402-29	551.2	963.2	0.57	24.4	0.1061	0.0022	0.3355	0.0030	4.9078	0.0443	1733.0	36.8	1865.2	14.1	1803.6	7.6	97
402-30	29.9	49.7	0.60	26.5	0.0965	0.0022	0.2655	0.0026	3.5333	0.0510	1557.5	42.9	1518.1	13.5	1534.7	11.4	101
402-31	51.6	209.6	0.25	26.2	0.1108	0.0023	0.3324	0.0030	5.0803	0.0519	1813.2	37.5	1850.0	14.5	1832.8	8.7	99
402-32	81.6	209.0	0.39	26.6	0.0643	0.002	0.1122	0.0014	0.9950	0.0303	751.9	73.9	685.5	8.1	701.3	15.4	102
402-33	273.2	888.4	0.31	24.0	0.0712	0.0015	0.1612	0.0014	1.5824	0.0155	963.4	41.8	963.2	7.9	963.3	6.1	100
402-34	62.2	313.2	0.20	26.8	0.1294	0.0027	0.3835	0.0034	6.8425	0.0656	2089.9	35.8	2092.5	15.9	2091.2	8.5	100
402-35	78.5	118.4	0.66	24.6	0.0737	0.0017	0.1786	0.0017	1.8144	0.0261	1033.0	46.4	1059.1	9.3	1050.7	9.4	99
402-36	306.5	579.3	0.53	24.5	0.0809	0.0017	0.2051	0.0018	2.2874	0.0227	1218.2	40.3	1202.8	9.7	1208.4	7.0	100
402-37	22.9	1347.0	0.02	29.0	0.1151	0.0024	0.3241	0.0028	5.1425	0.0467	1881.0	36.3	1809.7	13.8	1843.1	7.7	102
402-38	268.9	175.1	1.54	24.0	0.0698	0.0016	0.1514	0.0014	1.4572	0.0189	922.1	45.5	908.9	7.9	912.8	7.8	100
402-39	324.3	295.2	1.10	24.2	0.0735	0.0016	0.1703	0.0016	1.7247	0.0198	1026.3	43.1	1013.7	8.5	1017.8	7.4	100
402-40	117.4	154.0	0.76	25.1	0.0803	0.0018	0.1865	0.0017	2.0635	0.0250	1203.2	42.7	1102.2	9.4	1136.8	8.3	103
402-41	227.9	600.0	0.38	27.1	0.1570	0.0032	0.4483	0.0040	9.7023	0.0933	2423.1	34.6	2387.6	18.0	2406.9	8.9	101
402-42	149.2	708.9	0.21	23.9	0.0736	0.0015	0.1831	0.0016	1.8579	0.0181	1030.2	41.4	1083.8	8.8	1066.2	6.4	98
402-43	58.5	323.7	0.18	30.6	0.1121	0.0024	0.2820	0.0026	4.3594	0.0499	1833.6	38.5	1601.5	13.3	1704.7	9.5	106
402-44	110.7	149.4	0.74	24.9	0.0816	0.0018	0.2088	0.0019	2.3501	0.0275	1236.0	41.8	1222.7	10.3	1227.6	8.3	100
402-45	146.3	147.5	0.99	23.5	0.0588	0.0015	0.0876	0.0008	0.7099	0.0123	559.5	54.3	541.1	5.0	544.7	7.3	101
402-46	215.9	474.8	0.45	24.3	0.0730	0.0016	0.1713	0.0015	1.7248	0.0184	1014.5	42.1	1019.2	8.5	1017.8	6.9	100
402-47	65.8	108.3	0.61	25.6	0.0841	0.0019	0.2129	0.0021	2.4673	0.0341	1293.7	44.1	1244.0	10.9	1262.5	10.0	101
402-48	123.0	168.4	0.73	24.7	0.0874	0.0019	0.2423	0.0022	2.920	0.0323	1369.4	40.6	1398.6	11.5	1387.2	8.4	99
402-49	98.5	158.9	0.62	24.5	0.0718	0.0017	0.1625	0.0015	1.6092	0.0223	980.0	46.1	970.9	8.5	973.8	8.7	100
402-50	136.5	328.4	0.42	24.4	0.0665	0.0015	0.1349	0.0012	1.2366	0.0151	822.1	45.4	815.4	7.0	817.4	6.9	100
402-51	161.7	173.7	0.93	25.0	0.0826	0.0018	0.2042	0.0019	2.3265	0.0271	1260.5	41.8	1197.6	10.1	1220.4	8.3	102
402-52	21.5	797.3	0.03	40.3	0.0755	0.0018	0.1607	0.0016	1.6726	0.0250	1081.5	46.8	960.5	8.7	998.2	9.5	104
402-53	111.0	386.0	0.29	24.5	0.0720	0.0016	0.1614	0.0015	1.6018	0.0179	985.5	43.1	964.3	8.1	970.9	7.0	101
402-54	156.2	294.8	0.53	23.8	0.0597	0.0014	0.0909	0.0009	0.7486	0.0108	593.0	49.4	561.0	5.0	567.4	6.3	101
402-55	121.2	307.9	0.39	25.4	0.0891	0.0019	0.2331	0.0021	2.8659	0.0302	1407.1	39.9	1350.8	11.1	1373.0	7.9	102
402-56	140.8	273.5	0.51	25.1	0.0795	0.0017	0.1966	0.0018	2.1545	0.0256	1183.7	42.6	1156.9	9.8	1166.5	8.2	101
402-57	110.4	142.9	0.77	25.3	0.0796	0.0018	0.1898	0.0018	2.0829	0.0292	1186.1	45.0	1120.5	9.9	1143.2	9.6	102
402-58	132.2	328.1	0.40	27.3	0.1691	0.0035	0.5123	0.0047	11.9482	0.1185	2548.9	34.4	2666.3	20.1	2600.4	9.3	98
402-59	153.1	1178.0	0.13	28.3	0.1412	0.0030	0.3710	0.0035	7.2235	0.0763	2241.6	36.1	2034.1	16.3	2139.4	9.4	105
402-60	159.8	188.4	0.85	26.7	0.1626	0.0034	0.4806	0.0044	10.7806	0.1048	2483.2	34.5	2530.0	19.0	2504.4	9.0	99
注：Pb^为放射性成因铅(Pb^=0.241^²⁰⁶Pb+0.221^²⁰⁷Pb+0.524^*²⁰⁸Pb)，谐和度=100×年龄(²⁰⁷Pb/²³⁵U)/年龄(²⁰⁶Pb/²³⁸U)

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