磷灰石ID-TIMS高精度U-Pb定年方法

涂家润; 周红英; 崔玉荣; 李国占; 耿建珍; 张健

doi:10.15898/j.ykcs.202404170087

磷灰石ID-TIMS高精度U-Pb定年方法

涂家润^{1, 2,},
周红英^{1, 2},
崔玉荣³,
李国占^{1, 2},
耿建珍^{1, 2},
张健^{1, 2}

1.
中国地质调查局天津地质调查中心，天津 300170
2.
中国地质调查局华北地质科技创新中心，天津 300170
3.
中国地质调查局自然资源综合调查指挥中心，北京 100055

基金项目: 国家自然科学基金项目(42103025，42073055，41873066)

详细信息

作者简介:
涂家润，博士，高级工程师，主要从事同位素地质年代学和地球化学研究工作。E-mail：jrtu@mail.nankai.edu.cn

中图分类号: P597；O657.63
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出版历程
- 收稿日期: 2024-04-16
- 修回日期: 2024-05-29
- 录用日期: 2024-06-05
- 网络出版日期: 2024-08-08

A High-Precision ID-TIMS U-Pb Dating Method of Apatite

TU Jiarun^{1, 2,},
ZHOU Hongying^{1, 2},
CUI Yurong³,
LI Guozhan^{1, 2},
GENG Jianzhen^{1, 2},
ZHANG Jian^{1, 2}

1.
Tianjin Center, China Geological Survey, Tianjin 300170, China
2.
North China Center for Geoscience Innovation, Tianjin 300170, China
3.
Command Center for Natural Resources Comprehensive Survey, China Geological Survey, Beijing 100055, China

摘要

摘要:
磷灰石晶体结构呈六方晶系，具有相对高的封闭温度(350～550℃)，能够容纳多种元素置换进入晶格内部，是火成岩、沉积岩、变质岩和矿床研究的重要定年矿物。然而，由于磷灰石通常具有较低铀含量和高普通铅含量，精准测定其年龄仍是当前U-Pb测年技术的一大挑战。本文基于²⁰⁸Pb-²³⁵U混合稀释剂，通过优化样品清洗、溶解以及柱色谱分离纯化U和Pb等化学前处理流程，建立了磷灰石同位素稀释-热电离质谱(ID-TIMS)高精度U-Pb定年方法，并准确测定了磷灰石标样MAD2和MAP-3的年龄，其²⁰⁶Pb/²³⁸U年龄加权平均值分别为474.6±1.7Ma和800.7±1.2Ma，单点定年精度优于0.4%，为磷灰石微区原位标样研发以及样品年龄精准测定提供技术支撑。采用MAP-3作为微区原位校正标样，对磷灰石Durango和Otter Lake进行LA-ICP-MS U-Pb测年分析，通过Tera-Wasserburg谐和图图解法扣除普通铅，获得下交点年龄分别为32.1±0.6Ma(MSWD=1.3，n=36)和910±13Ma(MSWD=1.6，n=36)，与前人研究结果在误差范围内一致，进一步证实普通铅含量极低的MAP-3，是一个理想的磷灰石微区原位测年标样。与高普通铅的磷灰石标样相比，使用MAP-3作为外标能直接在数据处理软件中进行数据校正，有效地简化了数据处理过程，提高磷灰石微区原位U-Pb测年结果的可靠性。
- 同位素稀释-热电离质谱法 /
- U-Pb定年 /
- 稀释剂 /
- 普通铅 /
- 标样
Abstract:
Apatite belongs to the hexagonal crystal system and has a relatively high (350-550℃) closure temperature, which can accommodate multiple element substitutions into the crystal lattice. It is an important dating mineral for the study of igneous rocks, sedimentary rocks, metamorphic rocks and ore deposits. However, due to the low uranium content and high common lead content of apatite, accurate age determination remains a major challenge for current U-Pb dating techniques. Based on the ²⁰⁸Pb-²³⁵U mixed spike, a high-precision isotope dilution-thermal ionization mass spectrometry (ID-TIMS) U-Pb dating method of apatite was established by optimizing the chemical pre-treatment process of sample cleaning, dissolution, and column chromatography separation and purification of U and Pb. The proposed method accurately determined the ages of apatite MAD2 and MAP-3, with ²⁰⁶Pb/²³⁸U weighted average ages of 474.6±1.7Ma and 800.7±1.2Ma, respectively. The precision of single-point analysis was better than 0.4%, providing technical support for accurately and precisely dating apatite and development of apatite standards. Moreover, taking MAP-3 as a calibration standard, LA-ICP-MS U-Pb dating was performed on apatite in Durango and Otter Lake, resulting in lower intercept ages of 32.1±0.6Ma (MSWD=1.3, n=36) and 910±13Ma (MSWD=1.6, n=36) in a Tera-Wasserburg diagram, which were consistent with the previous research results within error. This gives further evidence that MAP-3, with extremely low common lead content, is an ideal apatite in situ U-Pb dating standard. Compared with high common lead apatite standards, MAP-3 as an external standard can directly calibrate the isotopic data, effectively simplifying the data analysis process and improving the reliability of in situ apatite U-Pb dating results.
- isotope dilution-thermal ionization-mass spectrometry /
- U-Pb dating /
- spike /
- common lead /
- standards

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图 1 磷灰石MAP-3 ID-TIMS U-Pb年龄(a)谐和图；(b)权重平均年龄

Figure 1. ID-TIMS U-Pb ages of apatite MAP-3. (a) Concordia diagram; (b) Weighted mean age diagram

下载: 全尺寸图片幻灯片

图 2 磷灰石LA-ICP-MS微区分析U-Pb 含量协变图

Figure 2. Binary plot of U vs Pb content in the apatite by LA-ICP-MS

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图 3 磷灰石LA-ICP-MS微区原位U-Pb测年：(a) Durango；(b) Otter Lake

Figure 3. In situ apatite U-Pb dating results of (a) Durango and (b) Otter Lake by LA-ICP-MS

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表 1 磷灰石ID-TIMS U-Pb定年结果

Table 1 ID-TIMS U-Pb dating results of apatite

MAD2样品	元素含量 (μg/g)		同位素比值							年龄(Ma)						Rho
MAD2样品	Pb	U	²⁰⁶Pb/²⁰⁴Pb	²⁰⁶Pb/²³⁸U	误差 (%)	²⁰⁷Pb/²³⁵U	误差 (%)	²⁰⁷Pb/²⁰⁶Pb	误差 (%)	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	Rho
1	9.8	22.4	92.8	0.07646	0.26	0.5975	1.36	0.05668	1.19	475.0	1.2	475.7	6.5	479	26	0.716
2	9.2	21.6	93.3	0.07634	0.26	0.5961	1.37	0.05663	1.20	474.3	1.2	474.8	6.5	477	26	0.700
MAP-3样品	元素含量 (μg/g)		同位素比值							年龄(Ma)						Rho
MAP-3样品	Pb	U	²⁰⁶Pb/²⁰⁴Pb	²⁰⁶Pb/²³⁸U	误差 (%)	²⁰⁷Pb/²³⁵U	误差 (%)	²⁰⁷Pb/²⁰⁶Pb	误差 (%)	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	Rho
1	3.9	16.0	106.9	0.1321	0.29	1.200	1.05	0.06593	0.90	799.9	2.3	800.8	8.4	803	38	0.623
2	4.2	16.3	100.5	0.1321	0.27	1.206	0.91	0.06622	0.72	799.9	2.2	803.2	7.3	812	30	0.794
3	3.1	16.3	274.9	0.1323	0.11	1.202	0.55	0.06589	0.49	801.1	0.9	801.3	4.4	802	20	0.635
4	3.4	16.0	187.8	0.1322	0.15	1.200	0.55	0.06588	0.47	800.3	1.2	800.6	4.4	802	20	0.678
5	4.3	17.0	105.5	0.1322	0.25	1.196	0.89	0.06564	0.71	800.6	2.0	798.9	7.1	794	30	0.792
6	4.5	16.2	87.61	0.1325	0.34	1.185	1.11	0.06487	0.86	802.1	2.8	793.5	8.8	769	36	0.790

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表 2 磷灰石LA-ICP-MS U-Pb定年结果

Table 2 LA-ICP-MS U-Pb dating results of apatite

MAP-3 样品	元素含量(μg/g)			同位素比值						年龄(Ma)
MAP-3 样品	Pb	Th	U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
1	0.05	46.2	30.1	0.0648	0.0025	1.1805	0.0440	0.1318	0.0013	769	84	792	20	798	8
2	0.07	43.8	29.2	0.0663	0.0018	1.2173	0.0340	0.1334	0.0013	817	53	809	16	807	7
3	0.10	42.5	29.5	0.0652	0.0019	1.1789	0.0372	0.1311	0.0014	789	63	791	17	794	8
4	0.05	44.1	30.7	0.0649	0.0019	1.1792	0.0357	0.1323	0.0013	772	64	791	17	801	7
5	0.05	39.0	29.1	0.0666	0.0021	1.2170	0.0416	0.1322	0.0014	833	61	808	19	801	8
6	0.08	41.8	30.3	0.0671	0.0021	1.2135	0.0382	0.1309	0.0014	839	63	807	18	793	8
7	0.05	32.8	24.7	0.0644	0.0024	1.1828	0.0435	0.1336	0.0018	755	78	793	20	809	10
8	0.06	28.4	21.3	0.0666	0.0026	1.2091	0.0461	0.1321	0.0017	833	81	805	21	800	10
9	0.05	30.1	22.7	0.0649	0.0024	1.1871	0.0449	0.1324	0.0018	772	78	795	21	802	10
10	0.06	33.5	26.8	0.0673	0.0021	1.2221	0.0402	0.1316	0.0015	850	69	811	18	797	9
11	0.07	34.7	27.8	0.0641	0.0021	1.1741	0.0416	0.1329	0.0017	746	69	789	19	805	9
12	0.07	35.4	27.8	0.0655	0.0022	1.1893	0.0409	0.1315	0.0014	791	70	796	19	797	8
13	0.05	26.8	24.9	0.0659	0.0024	1.2069	0.0454	0.1329	0.0015	806	78	804	21	805	9
14	0.06	26.5	23.3	0.0659	0.0024	1.2034	0.0447	0.1326	0.0018	806	76	802	21	803	11
15	0.07	31.9	26.3	0.0656	0.0023	1.1928	0.0429	0.1319	0.0016	791	74	797	20	799	9
16	0.07	31.7	26.4	0.0640	0.0023	1.1545	0.0415	0.1312	0.0017	740	78	779	20	795	10
17	0.09	36.4	26.5	0.0675	0.0023	1.2417	0.0448	0.1332	0.0016	854	68	820	20	806	9
18	0.06	37.7	27.9	0.0648	0.0021	1.1770	0.0381	0.1319	0.0015	766	67	790	18	798	8
19	0.08	32.3	26.3	0.0667	0.0022	1.2193	0.0401	0.1326	0.0015	829	69	809	18	803	8
20	0.07	38.5	32.3	0.0641	0.0033	1.1835	0.0586	0.1340	0.0029	746	107	793	27	811	17
21	0.04	33.6	26.6	0.0646	0.0021	1.1695	0.0382	0.1314	0.0015	763	67	786	18	796	9
22	0.02	37.5	30.1	0.0668	0.0025	1.2268	0.0469	0.1331	0.0019	831	78	813	21	806	11
23	0.06	37.7	27.4	0.0672	0.0025	1.2194	0.0470	0.1318	0.0018	844	78	810	22	798	11
24	0.07	41.5	30.2	0.0643	0.0027	1.1768	0.0515	0.1327	0.0020	750	91	790	24	803	11
25	0.07	40.5	29.6	0.0649	0.0026	1.1802	0.0463	0.1324	0.0017	772	85	791	22	801	10
26	0.07	36.0	26.3	0.0666	0.0025	1.2160	0.0462	0.1321	0.0015	833	78	808	21	800	8
27	0.09	26.2	29.7	0.0643	0.0029	1.1701	0.0516	0.1320	0.0019	750	94	787	24	799	11
28	0.05	27.6	20.8	0.0654	0.0027	1.2025	0.0515	0.1334	0.0015	787	87	802	24	807	9
29	0.05	35.5	28.1	0.0655	0.0026	1.1997	0.0460	0.1330	0.0017	791	83	800	21	805	10
30	0.09	34.2	26.9	0.0660	0.0022	1.1966	0.0394	0.1315	0.0016	806	66	799	18	797	9
31	0.08	40.3	32.0	0.0678	0.0030	1.2244	0.0523	0.1314	0.0018	861	94	812	24	796	10
32	0.06	40.4	26.6	0.0668	0.0023	1.1941	0.0427	0.1299	0.0015	831	68	798	20	787	9
33	0.03	29.4	24.2	0.0647	0.0024	1.2021	0.0484	0.1346	0.0017	765	80	802	22	814	10
34	0.07	31.9	24.9	0.0642	0.0024	1.1775	0.0435	0.1331	0.0018	748	50	790	20	806	10
35	0.06	29.7	22.4	0.0673	0.0026	1.2187	0.0466	0.1314	0.0018	856	80	809	21	796	10
36	0.06	29.7	22.6	0.0672	0.0025	1.2232	0.0476	0.1321	0.0016	843	80	811	22	800	9
Durango 样品	元素含量(μg/g)			同位素比值						年龄(Ma)
Durango 样品	Pb	Th	U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
1	0.08	431.4	28.8	0.2609	0.0390	0.1497	0.0152	0.0059	0.0003	3254	238	142	13	38	2
2	0.16	559.8	37.9	0.2094	0.0432	0.1321	0.0279	0.0056	0.0006	2901	340	126	25	36	4
3	0.10	433.2	28.8	0.1793	0.0460	0.1610	0.0182	0.0060	0.0002	2646	439	152	16	38	1
4	0.10	422.8	28.2	0.3682	0.0938	0.1775	0.0180	0.0061	0.0002	3784	397	166	16	39	1
5	0.11	450.0	30.0	0.2383	0.0354	0.1548	0.0150	0.0061	0.0002	3109	239	146	13	39	1
6	0.13	441.0	29.3	0.2216	0.0464	0.1468	0.0359	0.0059	0.0002	2992	342	139	32	38	1
7	0.12	443.7	29.4	0.2602	0.1103	0.0983	0.0158	0.0058	0.0002	3248	724	95	15	37	1
8	0.09	445.7	29.5	0.2118	0.0395	0.1282	0.0149	0.0062	0.0002	2919	307	122	13	40	2
9	0.11	427.5	28.4	0.0000	0.0000	0.1779	0.0144	0.0064	0.0002	−	−	166	12	41	1
10	0.09	433.5	29.1	0.2339	0.0267	0.1431	0.0141	0.0056	0.0002	3079	183	136	13	36	2
11	0.09	423.3	28.5	0.2342	0.0271	0.1430	0.0140	0.0056	0.0002	3081	186	136	12	36	2
12	0.09	411.9	27.7	0.2208	0.0279	0.1462	0.0141	0.0061	0.0002	2987	204	139	13	39	1
13	0.10	417.3	28.4	0.1753	0.0392	0.1312	0.0136	0.0057	0.0002	2609	375	125	12	37	1
14	0.12	399.9	27.0	0.0774	0.0990	0.1272	0.0158	0.0058	0.0003	1132	1488	122	14	37	2
15	0.10	414.8	27.8	0.1731	0.0434	0.1216	0.0142	0.0059	0.0002	2588	430	117	13	38	2
16	0.10	431.4	28.8	0.1954	0.0215	0.1444	0.0134	0.0064	0.0003	2789	181	137	12	41	2
17	0.12	433.4	28.9	0.2054	0.0628	0.0858	0.0144	0.0057	0.0002	2869	519	84	13	36	2
18	0.10	430.5	28.6	0.1547	0.1071	0.1729	0.0148	0.0061	0.0002	2398	1591	162	13	39	2
19	0.10	449.8	29.4	0.1582	0.0499	0.1346	0.0166	0.0061	0.0003	2437	559	128	15	39	2
20	0.11	437.4	28.6	0.2234	0.0260	0.1710	0.0156	0.0064	0.0002	3005	188	160	14	41	2
21	0.08	437.2	28.6	0.4834	0.2508	0.1420	0.0145	0.0058	0.0002	4192	1122	135	13	38	1
22	0.08	441.5	28.8	0.2613	0.0529	0.1755	0.0182	0.0058	0.0002	3255	324	164	16	37	2
23	0.11	502.3	33.0	0.2055	0.0281	0.1446	0.0190	0.0061	0.0003	2870	224	137	17	39	2
24	0.07	442.4	29.0	0.2263	0.0602	0.1714	0.0167	0.0058	0.0003	3026	440	161	14	37	2
25	0.12	428.2	28.0	0.2170	0.0418	0.1360	0.0149	0.0059	0.0002	2958	316	129	13	38	2
26	0.13	499.2	32.8	0.1948	0.0392	0.1548	0.0223	0.0060	0.0003	2784	335	146	20	38	2
27	0.10	419.7	27.8	0.1378	0.0305	0.1292	0.0145	0.0063	0.0002	2200	393	123	13	40	1
28	0.11	423.3	28.0	0.1976	0.0239	0.1311	0.0140	0.0060	0.0002	2806	199	125	13	39	1
29	0.09	462.6	30.5	0.2353	0.0340	0.1545	0.0171	0.0060	0.0003	3089	233	146	15	38	2
30	0.09	500.1	33.2	0.2165	0.0291	0.1526	0.0184	0.0060	0.0003	2955	223	144	16	38	2
31	0.09	431.8	28.4	0.2207	0.0427	0.1393	0.0151	0.0061	0.0003	2987	321	132	13	39	2
32	0.10	440.8	28.9	0.1693	0.0335	0.1382	0.0158	0.0061	0.0002	2551	337	131	14	39	2
33	0.07	444.7	28.8	0.2302	0.0773	0.1586	0.0161	0.0059	0.0002	3053	560	150	14	38	2
34	0.10	439.3	28.5	0.2513	0.0501	0.1576	0.0162	0.0059	0.0003	3194	321	149	14	38	2
35	0.09	447.6	29.5	0.2095	0.0381	0.1414	0.0161	0.0060	0.0003	2902	299	134	14	39	2
36	0.15	457.4	29.8	0.2327	0.0289	0.1741	0.0167	0.0066	0.0003	3072	200	163	14	43	2
Otter Lake 样品	元素含量(μg/g)			同位素比值						年龄(Ma)
Otter Lake 样品	Pb	Th	U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
1	1.74	553.4	147.8	0.1408	0.0155	3.2691	0.3406	0.1664	0.0041	2239	191	1474	81	992	23
2	1.41	263.3	93.4	0.1445	0.0099	3.4504	0.2251	0.1714	0.0026	2283	118	1516	51	1020	14
3	1.77	182.6	56.8	0.2146	0.0054	5.4643	0.1614	0.1843	0.0034	2940	40	1895	25	1090	19
4	0.95	178.6	38.6	0.2521	0.0051	6.8339	0.1775	0.1957	0.0027	3198	32	2090	23	1152	15
5	1.39	437.1	60.0	0.1715	0.0036	4.0178	0.1046	0.1687	0.0018	2573	34	1638	21	1005	10
6	1.23	330.8	39.1	0.1935	0.0042	4.8208	0.1160	0.1807	0.0021	2773	35	1789	20	1071	11
7	1.23	666.1	104.9	0.1343	0.0025	3.0840	0.0610	0.1661	0.0013	2155	31	1429	15	990	7
8	1.11	383.3	69.6	0.1691	0.0035	4.0172	0.0975	0.1711	0.0015	2550	35	1638	20	1018	8
9	1.13	498.6	84.0	0.1606	0.0036	3.7315	0.1008	0.1664	0.0014	2462	33	1578	22	992	8
10	0.88	103.1	19.1	0.2963	0.0087	8.4443	0.2636	0.2052	0.0027	3451	45	2280	28	1203	14
11	1.14	159.7	21.1	0.3107	0.0099	9.0356	0.3412	0.2082	0.0028	3524	48	2342	35	1219	15
12	1.30	231.7	40.2	0.2126	0.0047	5.2309	0.1247	0.1781	0.0016	2926	30	1858	20	1057	9
13	1.24	136.3	32.1	0.2111	0.0052	5.2680	0.1336	0.1806	0.0022	2914	40	1864	22	1070	12
14	0.98	329.4	51.8	0.1909	0.0039	4.6007	0.1112	0.1735	0.0018	2750	33	1749	20	1031	10
15	1.12	238.0	36.6	0.2253	0.0047	5.6751	0.1391	0.1815	0.0020	3020	34	1928	21	1075	11
16	1.20	140.6	42.7	0.1820	0.0040	4.3601	0.1006	0.1733	0.0015	2672	36	1705	19	1030	9
17	1.21	119.6	40.0	0.1788	0.0033	4.3273	0.0882	0.1748	0.0015	2642	29	1699	17	1038	8
18	1.34	533.7	71.4	0.1597	0.0045	3.8424	0.1145	0.1733	0.0018	2454	48	1602	24	1030	10
19	0.86	346.3	48.2	0.1794	0.0050	4.1841	0.1245	0.1680	0.0030	2647	47	1671	24	1001	17
20	1.17	165.4	46.2	0.2051	0.0062	5.1698	0.1756	0.1809	0.0024	2878	50	1848	29	1072	13
21	0.93	225.6	28.2	0.2170	0.0052	5.5341	0.1614	0.1838	0.0024	2958	39	1906	25	1087	13
22	1.26	202.3	54.5	0.1911	0.0052	4.8397	0.1826	0.1796	0.0022	2752	45	1792	32	1065	12
23	1.23	120.1	45.2	0.1886	0.0049	4.6458	0.1577	0.1759	0.0024	2731	42	1758	28	1044	13
24	1.20	95.0	26.7	0.2904	0.0085	8.3242	0.2427	0.2085	0.0040	3420	45	2267	26	1221	22
25	0.81	306.3	20.0	0.3252	0.0093	10.0052	0.3691	0.2188	0.0038	3594	44	2435	34	1275	20
26	0.81	587.8	35.9	0.2186	0.0056	5.4828	0.1482	0.1810	0.0020	2970	41	1898	23	1073	11
27	0.76	193.6	33.3	0.2319	0.0051	5.9810	0.1408	0.1863	0.0018	3065	35	1973	21	1101	10
28	0.82	515.3	30.1	0.2139	0.0051	5.3590	0.1448	0.1803	0.0018	2935	38	1878	23	1068	10
29	1.49	552.5	96.7	0.1562	0.0053	3.7183	0.1717	0.1693	0.0029	2417	53	1575	37	1008	16
30	0.82	146.4	28.9	0.2685	0.0093	7.5063	0.2963	0.1995	0.0029	3297	54	2174	35	1173	16
31	1.50	243.4	36.4	0.2164	0.0048	5.5621	0.1449	0.1847	0.0018	2955	36	1910	22	1092	10
32	1.11	264.0	36.1	0.2655	0.0094	7.5285	0.3287	0.1988	0.0027	3280	56	2176	39	1169	15
33	1.05	294.6	44.3	0.2400	0.0057	6.4487	0.2019	0.1916	0.0022	3120	37	2039	28	1130	12
34	1.46	289.1	41.1	0.2489	0.0065	6.6652	0.2106	0.1928	0.0027	3189	42	2068	28	1136	15
35	0.83	96.1	33.2	0.2127	0.0075	5.5419	0.1837	0.1878	0.0027	2928	58	1907	29	1109	15
36	1.09	671.2	106.2	0.1675	0.0079	4.6291	0.4488	0.1750	0.0049	2533	79	1755	81	1039	27

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磷灰石ID-TIMS高精度U-Pb定年方法

作者简介: 涂家润，博士，高级工程师，主要从事同位素地质年代学和地球化学研究工作。E-mail：jrtu@mail.nankai.edu.cn

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A High-Precision ID-TIMS U-Pb Dating Method of Apatite

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作者简介:
涂家润，博士，高级工程师，主要从事同位素地质年代学和地球化学研究工作。E-mail：jrtu@mail.nankai.edu.cn