Table 2 Zircon LA-ICP-MS U–Pb analytical results. Data in Italics (> 75% common Pb contamination) are excluded for further U–Pb analyses.

From: The Sendai river terraces monitored the co-seismic mega-thrusting

Sample name	Th (ppm)	U (ppm)	Th/U	f_Th/U^a	f₂₀₆%^b	Total^c						Age [Ma]^d		MSWD^e	No	rho1	rho2
Sample name	Th (ppm)	U (ppm)	Th/U	f_Th/U^a	f₂₀₆%^b	²⁰⁷Pb/²⁰⁶Pb	2σ	²⁰⁷Pb/²³⁵U	2σ	²⁰⁶Pb/²³⁸U	2σ	²⁰⁶Pb/²³⁸U	2σ	MSWD^e	No	rho1	rho2
Medeshima tuff measured on 03/06/2023
MDS-7(2)	331	283	1.17	0.29	63.4	0.54461	0.13446	0.00553	0.00156	0.00007	0.00002	0.26	0.10		M07	0.75	0.56
MDS-13	33	57	0.58	0.14	65.0	0.55732	0.26869	0.01366	0.00766	0.00018	0.00008	0.51	0.47		M13	0.74	0.57
MDS-3	31	54	0.58	0.15	49.7	0.43681	0.21914	0.00787	0.00489	0.00013	0.00004	0.53	0.26		M03	0.89	0.59
MDS-19(2)	32	108	0.30	0.07	53.0	0.46275	0.65730	0.00483	0.00270	0.00008	0.00002	0.59	0.16		M19	0.74	− 4.53
MDS-5	11	26	0.45	0.11	64.9	0.55616	0.38130	0.02572	0.00976	0.00034	0.00016	2.26	1.06		M05	0.27	− 0.23
MDS-8	1123	961	1.17	0.29	6.3	0.09573	0.00891	0.01498	0.00114	0.00114	0.00006	6.95	0.36		M08	0.58	0.01
MDS-9	307	747	0.41	0.10	0.3	0.04860	0.00178	0.11272	0.00339	0.01683	0.00022	107.68	1.41		M09	0.80	− 0.33
MDS-12	405	721	0.56	0.14	0.3	0.04875	0.00143	0.11566	0.00388	0.01721	0.00032	110.11	2.01		M12	0.19	0.49
MDS-14	180	339	0.53	0.13	1.5	0.05768	0.01051	0.14833	0.02910	0.01866	0.00058	119.27	3.69		M14	− 0.20	0.51
MDS-17	21	45	0.48	0.12	86.4	0.72524	0.33920	0.04314	0.01409	0.00043	0.00020	2.88	1.28		M17	0.79	0.34
MDS-18	48	81	0.60	0.15	88.4	0.74099	0.17783	0.02099	0.00700	0.00021	0.00005	1.42	0.30		M18	0.31	0.69
MDS-10(2)	42	67	0.63	0.16	92.5	0.77273	0.11504	0.06263	0.02028	0.00059	0.00016	3.88	1.04		M10	0.84	0.89
MDS-11	51	87	0.59	0.15	94.0	0.78445	0.68463	0.00642	0.00309	0.00006	0.00004	0.47	0.25		M11	0.40	− 0.20
MDS-1	40	74	0.54	0.13	96.8	0.80716	15.83737	0.01479	0.00597	0.00013	0.00004	0.95	0.29		M01	0.77	− 1415.17
MDS-2(2)	35	63	0.56	0.14	100.3	0.83461	2.30151	0.02066	0.00594	0.00018	0.00009	1.25	0.58		M02	0.97	− 25.23
MDS-4	47	77	0.61	0.15	105.7	0.87677	0.78614	0.00871	0.00286	0.00007	0.00004	0.56	0.24		M04	0.86	− 1.29
MDS-6(2)	19	37	0.52	0.13	110.2	0.91245	3.15123	0.04134	0.01157	0.00033	0.00012	2.21	0.80		M06	0.89	− 55.06
MDS-20	29	96	0.30	0.08	116.2	0.95927	0.88728	0.04660	0.01908	0.00035	0.00025	2.37	1.60		M20	0.89	− 0.33
MDS-15	13	28	0.45	0.11	133.5	1.09566	1.05862	0.07749	0.02917	0.00051	0.00025	3.40	1.60		M15	0.98	− 1.54
MDS-16	61	86	0.71	0.18	487.9	3.88052	3.10031	1.01851	0.91417	0.00190	0.00060	12.35	3.88		M16	0.59	0.47
											Weighted mean (n = 4)	0.37	0.28	5.0
Medeshima tuff measured on 03/23/2023
MDS-21(2)	138	293	0.47	0.12	0.9	0.05304	0.01221	0.00687	0.00136	0.00094	0.00006	6.11	0.35		No. 01	− 0.92	− 0.45
MDS-22	19	41	0.45	0.11	104.7	0.86895	0.28251	0.10066	0.04326	0.00084	0.00029	5.51	1.86		No. 02	0.90	0.67
MDS-23	25	37	0.68	0.17	192.5	1.55892	2.21866	0.01204	0.00737	0.00006	0.00004	0.45	0.26		No. 03	0.75	− 1.45
MDS-24	13	23	0.55	0.14	92.2	0.77055	15.60260	0.04026	0.01144	0.00038	0.00017	2.54	1.09		No. 04	0.56	− 1620.68
MDS-25	24	39	0.60	0.15	98.9	0.82330	10.80740	0.00685	0.00509	0.00006	0.00004	0.48	0.26		No. 05	0.73	− 178.76
MDS-26(2)	20	36	0.55	0.14	108.9	0.90159	1.17802	0.03643	0.00989	0.00029	0.00012	1.98	0.75		No. 06	0.94	− 6.80
MDS-27(2)	20	37	0.53	0.13	99.0	0.82444	0.07579	0.55354	0.11523	0.00487	0.00103	31.42	6.61		No. 07	0.88	0.90
MDS-28(2)	54	79	0.68	0.17	94.6	0.78970	0.13282	0.08013	0.02567	0.00074	0.00020	4.83	1.26		No. 08	0.97	0.85
MDS-29	35	59	0.59	0.15	136.9	1.12198	0.37482	0.04603	0.02363	0.00030	0.00012	2.01	0.75		No. 09	0.99	0.76
MDS-30	19	28	0.70	0.17	105.1	0.87187	0.13734	0.39594	0.22647	0.00330	0.00172	21.30	11.05		No. 10	0.98	0.96
MDS-31	17	29	0.59	0.15	88.1	0.73852	0.28096	0.04478	0.01043	0.00044	0.00006	2.93	0.36		No. 11	0.20	− 1.28
MDS-32	18	34	0.52	0.13	80.3	0.67679	0.52599	0.02099	0.01107	0.00023	0.00007	1.55	0.43		No. 12	0.75	− 0.77
MDS-33	19	33	0.57	0.14	101.2	0.84119	0.06226	0.99323	0.46182	0.00857	0.00405	55.09	25.95		No. 13	0.98	0.99
MDS-34	25	45	0.55	0.14	78.8	0.66563	0.42226	0.02724	0.00787	0.00030	0.00012	2.01	0.77		No. 14	0.83	− 0.67
MDS-35	31	53	0.60	0.15	85.6	0.71894	0.22427	0.03133	0.00705	0.00032	0.00005	2.13	0.31		No. 15	0.73	− 0.35
TbP1 tuff measured on 03/06/2023
TbP1-12	136	170	0.80	0.20	45.8	0.40606	0.12292	0.00589	0.00176	0.00011	0.00002	0.47	0.13		T12	0.97	0.33
TbP1-2	109	102	1.07	0.27	12.2	0.14172	0.04069	0.04894	0.01673	0.00251	0.00012	14.27	1.06		T02	0.97	1.11
TbP1-15	327	626	0.52	0.13	0.4	0.04929	0.00171	0.10651	0.00414	0.01568	0.00041	100.39	2.62		T15	0.79	0.48
TbP1-1	244	412	0.59	0.15	1.0	0.05381	0.00372	0.11935	0.00909	0.01609	0.00028	103.02	1.82		T01	− 0.55	0.49
TbP1-4(2)	529	570	0.93	0.23	1.4	0.05689	0.00249	0.13838	0.00480	0.01765	0.00052	112.87	3.29		T04	0.10	0.08
TbP1-14(2)	332	477	0.70	0.17	0.5	0.05029	0.00180	0.13161	0.00524	0.01899	0.00029	121.36	1.85		T14	0.92	0.44
TbP1-10	83	91	0.91	0.23	87.4	0.73265	0.18113	0.08155	0.02962	0.00081	0.00023	5.29	1.51		T10	0.95	0.74
TbP1-8	88	104	0.85	0.21	87.8	0.73604	0.11382	0.05991	0.01800	0.00059	0.00011	3.89	0.68		T08	0.98	0.92
TbP1-5	371	274	1.35	0.34	91.8	0.76753	0.07269	0.07599	0.05115	0.00072	0.00042	4.70	2.70		T05	0.99	1.00
TbP1-3	56	70	0.80	0.20	95.1	0.79341	0.14885	0.07975	0.01459	0.00073	0.00017	4.79	1.10		T03	0.99	0.62
TbP1-9	67	78	0.86	0.21	97.6	0.81282	0.09293	0.12184	0.03368	0.00109	0.00027	7.09	1.76		T09	0.97	0.91
TbP1-13	31	40	0.77	0.19	98.3	0.81897	0.13147	0.31251	0.07094	0.00277	0.00060	17.91	3.88		T13	0.93	0.74
TbP1-11(2)	172	141	1.22	0.30	103.3	0.85791	0.17352	0.06864	0.01916	0.00058	0.00014	3.82	0.89		T11	0.98	0.70
TbP1-7	155	134	1.15	0.29	104.8	0.86957	0.15606	0.07843	0.02268	0.00065	0.00015	4.29	0.96		T07	0.98	0.78
TbP1-6(2)	54	68	0.80	0.20	111.5	0.92249	0.07379	0.21415	0.07168	0.00168	0.00053	10.94	3.39		T06	0.97	0.97
Bishop Tuff (reference age: 0.767 ± 0.001 Ma; Crowley et al., 2007) measured on 03/06/2023
BST-P31	1686	2773	0.61	0.20	16.3	0.17445	0.06350	0.00319	0.00161	0.00013	0.00002	0.81	0.11			0.89	1.07
BST-P32	912	1573	0.58	0.19	6.2	0.09487	0.01704	0.00160	0.00034	0.00012	0.00001	0.84	0.05			0.24	0.67
BST-P33	4103	4128	0.99	0.33	2.3	0.06408	0.01949	0.00100	0.00028	0.00011	0.00000	0.80	0.03			0.16	− 0.87
BST-P34	2097	3329	0.63	0.21	8.8	0.11547	0.04159	0.00188	0.00094	0.00012	0.00001	0.79	0.08			0.70	1.19
BST-P35(2)	2275	3344	0.68	0.23	10.8	0.13121	0.02412	0.00215	0.00032	0.00012	0.00001	0.78	0.04			0.28	− 0.65
Arithmetic mean	2215	3029	0.70	0.23							Weighted mean (n = 5)	0.80	0.02	1.0
Fish Canyon Tuff (reference age: 28.402 ± 0.023 Ma; Schmitz and Bowring, 2001) measured on 03/06/2023
FCT20-90-2	263	394	0.67	0.30	2.1	0.06275	0.00467	0.04362	0.00363	0.00504	0.00019	31.85	1.19			0.87	0.45
FCT20-92-2	162	256	0.63	0.29	23.5	0.23046	0.04084	0.19851	0.04663	0.00625	0.00036	30.92	2.66			0.90	1.01
FCT20-93-2	555	595	0.93	0.42	0.2	0.04777	0.00283	0.03020	0.00151	0.00459	0.00007	29.53	0.48			0.01	− 0.47
FCT20-96-3	930	661	1.41	0.64	2.7	0.06699	0.00899	0.04203	0.00561	0.00455	0.00013	28.57	0.84			− 0.17	0.08
FCT20-97	454	672	0.67	0.31	0.2	0.04758	0.00285	0.03076	0.00208	0.00469	0.00014	30.22	0.90			0.13	0.47
Arithmetic mean	473	516	0.86	0.39							Weighted mean (n = 5)	29.70	1.20	5.7
Plešovice (reference age: 337.13 ± 0.37 Ma; Sláma et al., 2008) measured on 03/06/2023
P3-1-1165-2	195	1556	0.13		0.8	0.05270	0.00047	0.39275	0.01303	0.05407	0.00158	339.58	9.69			0.82	0.97
P3-1-1166	120	967	0.12		0.8	0.05241	0.00110	0.38709	0.01080	0.05359	0.00110	336.64	6.76			0.14	0.66
P3-1-1167	120	1022	0.12		1.0	0.05373	0.00111	0.39532	0.01160	0.05339	0.00159	335.41	9.76			0.91	0.76
P3-1-1168	118	1006	0.12		0.8	0.05206	0.00082	0.39166	0.01398	0.05459	0.00133	342.76	8.17			0.75	0.93
P3-1-1169	111	948	0.12		0.9	0.05321	0.00171	0.40165	0.01804	0.05477	0.00132	343.84	8.11			0.87	0.72
P3-1-1170(2)	109	959	0.11		1.0	0.05358	0.00077	0.39455	0.00794	0.05344	0.00123	335.69	7.56			0.82	0.78
P3-1-1171	141	1196	0.12		1.5	0.05770	0.00187	0.42570	0.00929	0.05354	0.00122	336.30	7.53			0.00	− 0.05
P3-1-1172	131	1128	0.12		0.9	0.05304	0.00087	0.39440	0.00480	0.05395	0.00063	338.85	3.89			0.79	0.06
Arithmetic mean	131	1098	0.12								Weighted mean (n = 8)	338.6	2.3	0.6

^af_Th/U = (Th/U)_zircon/(Th/U)_magma. (Th/U)_magma of 4.0 ± 2.0 for unknown, 3.0 ± 1.5 for Bishop Tuff, and 2.2 ± 1.1 for Fish Canyon Tuff were used.
^bf₂₀₆% denotes the percentage of ²⁰⁶Pb that is common Pb and is calculated as follows: f₂₀₆% = 100 × (x − 0.0461)/(0.832–0.0461), where x is a measured ²⁰⁷Pb/²⁰⁶Pb ratio.
^cMeasured isotope ratio, that is before corrections of initial ²³⁰Th and ²³¹Pa disequilibrium and common Pb.
^dIndividual U–Pb (²³⁸U–²⁰⁶Pb) ages were determined using the modified ²⁰⁷Pb method. Error of weighted mean is shown as 95% confidence level.
^eMSWD: mean square weighted deviation.
^fStatistical outlier identified by applying 2σ criterion in Isoplot.

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Table 2 Zircon LA-ICP-MS U–Pb analytical results. Data in Italics (> 75% common Pb contamination) are excluded for further U–Pb analyses.

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