Citation:

PANGAEA.928990

Name: U-Pb isotopy data of deformed samples from the Yushu mélange, western Jinsha Suture
Published: 2021-03-11
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Jinsha Suture; U-Pb isotopy; Yushu mélange

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Published: 2021-03-11 • DOI registered: 2023-11-17

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Abstract:

Deformed samples from the Yushu mélange, in the western Jinsha Suture, have been dated by U-Pb isotopy on zircons. This dataset presents U-Pb isotopy data obtained for these samples. The rock sample was crushed using standard procedures. The zircon grains were handpicked from the 80-200 micrometer non-magnetic fraction, placed on epoxy mounts and polished. Back-scattered electron images of the grains were acquired with a Hitachi S2500 Scanning Electron Microprobe at the Institut des Sciences de la Terre (ISTerre) of Grenoble (France). U-Pb zircon analyses were performed by in-situ LA-ICP-MS, using an ESI NWR193UC excimer laser coupled to a quadrupole Agilent 7700x ICP-MS at the GeOHeLiS analytical Platform (OSUR, Univ. Rennes). The diameter of the ablation spots varies from 20 to 30 µm, depending on the grain size. The repetition rate of the ablation was 3 Hz. Data were corrected for U-Pb and Th-Pb fractionation and for mass bias by repeated measurements of the standard GJ-1 (Jackson et al., 2004). Accuracy was monitored by analyses of the standard Plešovice (337.13 ± 0.37 Ma, Sláma et al., 2008), which produced a concordia age of 337.1 ± 2.1 Ma (N=18; MSWD=0.65) during the course of the analyses. Data reduction was carried out using the software Iolite v4 (Paton et al., 2010, 2011). The concordia ages and diagrams were generated using IsoplotR (Vermeesch, 2018). The full instrumental and analytical conditions can be found in Table "Operating conditions for the LA-ICP-MS equipment" and in Nosenzo et al. (2022).

Keyword(s):

Jinsha Suture; U-Pb isotopy; Yushu mélange

Related to:

Goussin, Fanny; Guillot, Stéphane; Ruffet, Gilles; Poujol, Marc; Oliot, Émilien; Replumaz, Anne; Cordier, Carole; Dupont-Nivet, Guillaume; Roperch, Pierrick (2021): K-Ar isotopy data of deformed samples from the Yushu mélange, western Jinsha Suture [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.932623

References:

Horstwood, Matthew S A; Košler, Jan; Gehrels, George; Jackson, Simon E; McLean, Noah M; Paton, Chad; Pearson, Norman J; Sircombe, Keith; Sylvester, Paul; Vermeesch, P; Bowring, James F; Condon, Daniel J; Schoene, Blair (2016): Community-Derived Standards for LA - ICP - MS U-(Th-)Pb Geochronology – Uncertainty Propagation, Age Interpretation and Data Reporting. Geostandards and Geoanalytical Research, 40(3), 311-332, https://doi.org/10.1111/j.1751-908X.2016.00379.x

Jackson, Simon E; Pearson, Norman J; Griffin, William L; Belousova, Elena A (2004): The application of laser ablation-inductively coupled plasma-mass spectrometry to in situ U–Pb zircon geochronology. Chemical Geology, 211(1-2), 47-69, https://doi.org/10.1016/j.chemgeo.2004.06.017

Nosenzo, Francesco; Manzotti, Paola; Poujol, Marc; Ballèvre, Michel; Langlade, Jessica (2022): A window into an older orogenic cycle: P–T conditions and timing of the pre-Alpine history of the Dora-Maira Massif (Western Alps). Journal of Metamorphic Geology, 40(4), 789-821, https://doi.org/10.1111/jmg.12646

Paton, Chad; Hellstrom, John C; Paul, Bence; Woodhead, Jon D; Hergt, Janet M (2011): Iolite: Freeware for the visualisation and processing of mass spectrometric data. Journal of Analytical Atomic Spectrometry, 26(12), 2508, https://doi.org/10.1039/C1JA10172B

Paton, Chad; Woodhead, Jon D; Hellstrom, John C; Hergt, Janet M; Greig, Alan; Maas, Roland (2010): Improved laser ablation U-Pb zircon geochronology through robust downhole fractionation correction. Geochemistry, Geophysics, Geosystems, 11(3), 2009GC002618, https://doi.org/10.1029/2009GC002618

Sláma, Jiří; Košler, Jan; Condon, Daniel J; Crowley, James L; Gerdes, Axel; Hanchar, John M; Horstwood, Matthew S A; Morris, George A; Nasdala, Lutz; Norberg, Nicholas; Schaltegger, Urs; Schoene, Blair; Tubrett, Michael N; Whitehouse, Martin J (2008): Plešovice zircon — A new natural reference material for U–Pb and Hf isotopic microanalysis. Chemical Geology, 249(1-2), 1-35, https://doi.org/10.1016/j.chemgeo.2007.11.005

van Achterbergh, E; Ryan, C G; Jackson, Simon E; Griffin, William L (2001): Data reduction software for LA-ICP-MS. In: Sylvester, P (Ed.), Laser-ablation-ICPMS in the Earth Sciences: Principles and Applications, vol. 29. Mineralogical Association of Canada, 29, 239-243

Vermeesch, Pieter (2018): IsoplotR: A free and open toolbox for geochronology. Geoscience Frontiers, 9(5), 1479-1493, https://doi.org/10.1016/j.gsf.2018.04.001

Documentation:

Operating conditions for the LA-ICP-MS equipment

Coverage:

Latitude: 33.059667 * Longitude: 96.911361

Date/Time Start: 2014-10-05T00:00:00 * Date/Time End: 2014-10-05T00:00:00

Minimum Elevation: 3900.0 m * Maximum Elevation: 3900.0 m

Event(s):

YU-14-63B * Latitude: 33.059667 * Longitude: 96.911361 * Date/Time: 2014-10-05T00:00:00 * Elevation: 3900.0 m * Method/Device: Rock sample (ROCK)

Comment:

Concordance was calculated as:

* if age>1 Ga: Conc%=(206Pb/238U Age x 100)/207Pb/235U Age and

* if age >1 Ga as: Conc%=(207Pb/235U Age x 100)/207Pb/206Pb Age

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Identification	ID		Goussin, Fanny		Identifier
2	Identification	ID		Goussin, Fanny		Zircon N°
3	Description	Description		Goussin, Fanny
4	Lead-206	206Pb	%	Goussin, Fanny	Laser-ablation inductively coupled plasma mass spectrometer (LA-ICP-MS)	f206c: calculated fraction of common lead
5	Lead-206	206Pb	mg/kg	Goussin, Fanny	Laser-ablation inductively coupled plasma mass spectrometer (LA-ICP-MS)
6	Uranium	U	mg/kg	Goussin, Fanny	Laser-ablation inductively coupled plasma mass spectrometer (LA-ICP-MS)	ppm
7	Thorium/Uranium ratio	Th/U		Goussin, Fanny	Laser-ablation inductively coupled plasma mass spectrometer (LA-ICP-MS)
8	Lead	Pb	mg/kg	Goussin, Fanny	Laser-ablation inductively coupled plasma mass spectrometer (LA-ICP-MS)	ppm
9	Lead-207/Uranium-235 ratio	207Pb/235U		Goussin, Fanny	Laser-ablation inductively coupled plasma mass spectrometer (LA-ICP-MS)
10	Lead-207/Uranium-235 ratio, error, relative	207Pb/235U e rel	%	Goussin, Fanny	Laser-ablation inductively coupled plasma mass spectrometer (LA-ICP-MS)	2SE
11	Lead-206/Uranium-238 ratio	206Pb/238U		Goussin, Fanny	Laser-ablation inductively coupled plasma mass spectrometer (LA-ICP-MS)
12	Lead-206/Uranium-238 ratio, error, relative	206Pb/238U e rel	%	Goussin, Fanny	Laser-ablation inductively coupled plasma mass spectrometer (LA-ICP-MS)	2SE
13	Correlation coefficient, isotope ratio error	Rho		Goussin, Fanny
14	Age, mineral	Age mineral	Ma	Goussin, Fanny	Age, 207Pb/206Pb Lead-Lead
15	Age, error	Age e	±	Goussin, Fanny	Age, 207Pb/206Pb Lead-Lead	1σ
16	Age, mineral	Age mineral	Ma	Goussin, Fanny	Age, 206Pb/238U Lead-Uranium
17	Age, error	Age e	±	Goussin, Fanny	Age, 206Pb/238U Lead-Uranium	1σ
18	Age, mineral	Age mineral	Ma	Goussin, Fanny	Age, 207Pb/235U Lead-Uranium
19	Age, error	Age e	±	Goussin, Fanny	Age, 207Pb/235U Lead-Uranium	1σ
20	Percentage	Perc	%	Goussin, Fanny		Conc.(%)
21	Comment	Comment		Goussin, Fanny

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1374 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 ID (Identifier)	2 ID (Zircon N°)	3 Description	4 206Pb [%] (f206c: calculated fraction of...)	5 206Pb [mg/kg] (Laser-ablation inductively co...)	6 U [mg/kg] (ppm, Laser-ablation inductive...)	7 Th/U (Laser-ablation inductively co...)	8 Pb [mg/kg] (ppm, Laser-ablation inductive...)	9 207Pb/235U (Laser-ablation inductively co...)	10 207Pb/235U e rel [%] (2SE, Laser-ablation inductive...)	11 206Pb/238U (Laser-ablation inductively co...)	12 206Pb/238U e rel [%] (2SE, Laser-ablation inductive...)	13 Rho	14 Age mineral [Ma] (Age, 207Pb/206Pb Lead-Lead)	15 Age e [±] (1σ, Age, 207Pb/206Pb Lead-Lead)	16 Age mineral [Ma] (Age, 206Pb/238U Lead-Uranium)	17 Age e [±] (1σ, Age, 206Pb/238U Lead-Uranium)	18 Age mineral [Ma] (Age, 207Pb/235U Lead-Uranium)	19 Age e [±] (1σ, Age, 207Pb/235U Lead-Uranium)	20 Perc [%] (Conc.(%))	21 Comment
6121016.d	Zr10.1	dark rim	0.190	52032	1739	0.03	64	0.2345	2.1	0.03277	2.3	0.34	276	53	208	5	214	4	97.2
7121016.d	Zr10.2	rim	0.122	19113	606	0.25	162	0.2339	3.1	0.03334	2.6	0.07	256	79	211	5	213	6	99.1
8121016.d	Zr10.3	light core	0.039	4159	130	0.46	55	0.2269	4.7	0.03335	2.8	0.08	226	120	212	6	208	9	101.8
9121016.d	Zr1.1	dark rim	0.161	53058	1760	0.07	107	0.2334	1.9	0.03279	2.3	0.34	266	53	208	5	213	4	97.7
10121016.d	Zr1.2	rim	0.273	27684	954	0.03	21	0.2362	2.7	0.03288	2.4	0.29	306	68	209	5	215	5	96.9
11121016.d	Zr1.3	core	0.107	47189	1537	0.24	342	0.2364	2.3	0.03373	2.7	0.46	253	61	214	6	215	5	99.3
12121016.d	Zr2.1	core	2.888	4780	148	0.39	68	0.3427	4.0	0.03439	2.7	0.11	1029	88	218	6	299	10	72.8	eliminated data (significant amount of common Pb)
13121016.d	Zr2.2	rim	0.363	22878	784	0.15	99	0.2393	3.4	0.03298	2.7	0.20	337	84	209	6	218	7	96.0
18121016.d	Zr3	core	0.546	98615	3392	0.35	925	0.2420	2.0	0.03236	2.5	0.46	395	53	205	5	220	4	93.3
19121016.d	Zr7.1	core	0.004	69760	2334	0.39	886	0.2343	2.5	0.03367	2.7	0.51	215	58	214	6	214	5	99.9
20121016.d	Zr7.2	rim	0.357	29488	1060	0.03	26	0.2397	2.8	0.03313	2.6	0.16	336	74	210	5	218	6	96.3
21121016.d	Zr7.4	int. zoning	3.804	38383	1355	0.12	282	0.3632	3.8	0.03266	3.1	0.32	1212	78	207	6	315	10	65.9	eliminated data (significant amount of common Pb)
22121016.d	Zr7.3	int. light overgrowth	0.267	30961	1078	0.06	61	0.2363	3.0	0.03284	2.8	0.19	304	77	208	6	215	6	96.7
23121016.d	Zr6.2	light core	0.240	27916	911	0.29	277	0.2407	2.4	0.03349	2.4	0.24	298	62	212	5	219	5	97.0
24121016.d	Zr6.3	dark rim	0.691	18681	668	0.14	90	0.2448	3.1	0.03197	2.5	0.20	440	75	203	5	222	6	91.2
28121016.d	Zr5.1	dark core	0.219	59471	2081	0.26	470	0.2376	2.6	0.03314	2.7	0.42	289	64	210	6	216	5	97.1
29121016.d	Zr5.2	int. zoning	1.267	49900	1663	0.27	434	0.2693	2.4	0.03226	2.4	0.32	615	57	205	5	242	5	84.5	eliminated data (significant amount of common Pb)
30121016.d	Zr5.3	dark overgrowth	0.015	83358	2872	0.03	66	0.2264	2.0	0.03245	2.3	0.42	212	54	206	5	207	4	99.3
31121016.d	Zr8.1	light overgrowth	0.116	58237	2069	0.23	402	0.2247	2.2	0.03182	2.4	0.28	244	59	202	5	206	4	98.1
32121016.d	Zr8.2	int. zoning	0.061	43174	1437	0.33	435	0.2319	2.6	0.03313	2.6	0.22	232	65	210	5	212	5	99.2
33121016.d	Zr8.3	dark core	0.214	71015	2637	0.32	749	0.2229	2.4	0.03125	2.8	0.39	276	63	198	5	204	4	97.1
34121016.d	Zr9	rim	0.633	28140	1086	0.15	33	0.2419	3.4	0.03177	3.1	0.27	420	83	202	6	220	7	91.6
5121016.d	Zr14.1	int. zoning	1.399	26149	1334	1.12	507	0.2474	3.6	0.02970	3.0	0.10	640	57	189	6	224	7	84.0	eliminated data (significant amount of common Pb)
6121016.d	Zr14.2	dark overgrowth	5.194	77189	6113	2.45	1689	0.2580	3.8	0.02054	3.3	0.39	1424	53	131	4	233	8	56.2	eliminated data (significant amount of common Pb)
7121016.d	Zr16.1	core	0.043	10785	540	0.28	140	0.2338	4.3	0.03403	3.2	0.09	231	83	216	7	213	8	101.1
8121016.d	Zr16.2	rim	0.582	6895	395	0.07	32	0.2265	6.2	0.03099	3.7	-0.01	399	134	197	7	207	12	94.9
9121016.d	Zr16.3	rim	0.260	12994	676	0.42	257	0.2429	4.2	0.03399	3.1	-0.02	308	80	215	7	221	8	97.6
10121016.d	Zr17.1	core	0.665	5655	339	0.51	94	0.2316	5.7	0.03133	3.5	-0.01	428	125	199	7	212	11	94.0
11121016.d	Zr17.2	int. zoning	0.339	13968	794	0.33	233	0.2390	5.2	0.03365	3.3	0.63	333	107	213	7	218	10	98.1
12121016.d	Zr17.3	rim	3.566	42263	2818	0.84	736	0.3233	4.1	0.02999	3.0	-0.04	1155	68	190	6	284	10	67.0	eliminated data (significant amount of common Pb)
16121016.d	Zr18.1	core	0.194	9670	592	0.35	178	0.2372	4.3	0.03379	3.1	0.15	284	82	214	7	216	8	99.1
17121016.d	Zr18.2	int. zoning	19.857	58754	5751	3.99	3059	0.6477	3.8	0.02244	3.4	0.63	2881	38	143	5	507	15	28.2	eliminated data (significant amount of common Pb)
18121016.d	Zr18.3	dark rim	0.811	49272	2977	0.24	650	0.2680	3.5	0.03428	3.0	0.11	490	55	217	6	241	8	90.1	eliminated data (significant amount of common Pb)
19121016.d	Zr13.1	dark rim	0.074	47563	3185	0.02	71	0.2181	3.4	0.03133	2.9	0.16	226	51	199	6	200	6	99.3
20121016.d	Zr13.2	core	0.000	7898	508	0.17	74	0.2294	5.0	0.03328	3.2	0.07	198	99	211	7	210	9	100.6
21121016.d	Zr12.1	dark rim	1.219	18917	1331	0.20	230	0.2536	4.1	0.03100	3.1	0.06	595	73	197	6	230	9	85.8	eliminated data (significant amount of common Pb)
22121016.d	Zr12.2	light rim	0.310	20885	1418	0.26	331	0.2235	4.2	0.03104	3.1	0.00	308	79	197	6	205	8	96.2
23121016.d	Zr11.1	rim	0.655	41023	2931	0.04	119	0.2389	3.9	0.03146	3.1	0.14	425	72	200	6	218	8	91.8
27121016.d	Zr11.2	int. zoning	5.540	68734	6581	0.84	1553	0.3027	3.9	0.02360	3.2	-0.18	1490	67	150	5	269	9	56.0	eliminated data (significant amount of common Pb)
28121016.d	Zr19.1	light overgrowth	0.000	8876	99	0.71	416	3.0130	4.6	0.19942	3.6	0.09	1823	77	1172	38	1411	35	77.4
29121016.d	Zr19.2	zoned core	0.000	55523	648	0.34	1102	2.7692	3.3	0.19052	3.0	0.34	1723	36	1124	31	1347	24	78.2
30121016.d	Zr21	dark rim	6.193	35024	2467	0.99	769	0.4245	3.9	0.03111	3.1	0.18	1614	55	197	6	359	12	55.0	eliminated data (significant amount of common Pb)
31121016.d	Zr26	rim	0.028	29468	2008	0.16	267	0.2151	3.9	0.03128	3.1	0.25	209	68	199	6	198	7	100.3
32121016.d	Zr25	rim	0.168	12922	885	0.20	158	0.2194	4.1	0.03124	3.0	0.15	259	74	198	6	201	7	98.5
33121016.d	Zr24.1	overgrowth	0.275	24380	1630	0.12	186	0.2268	3.8	0.03130	3.0	0.16	298	61	199	6	208	7	95.7
34121016.d	Zr24.2	int. zoning	2.308	4546	306	0.41	103	0.2887	6.1	0.03083	3.6	0.11	881	118	196	7	258	14	76.0	eliminated data (significant amount of common Pb)
5121016.d	Zr23	rim	1.255	9824	752	0.19	60	0.2475	3.9	0.03029	9.0	0.02	602	88	192	17	225	8	85.7	eliminated data (significant amount of common Pb)
6121016.d	Zr22	int. zoning	0.307	22384	1460	0.17	181	0.2341	2.9	0.03201	8.9	0.06	313	60	203	18	214	6	95.1
7121016.d	Zr30	int. zoning	0.191	5006	353	0.32	73	0.2335	6.5	0.03288	9.2	0.07	277	155	209	19	213	12	97.9
8121016.d	Zr29	core	0.985	13859	895	0.34	91	0.2594	3.9	0.03235	8.9	-0.07	533	91	205	18	234	8	87.6	eliminated data (significant amount of common Pb)
9121016.d	Zr27.1	dark rim	0.091	52341	3539	0.19	618	0.2321	2.4	0.03269	8.8	0.26	241	42	207	18	212	5	97.8
10121016.d	Zr27.2	int. zoning	0.047	10682	642	0.23	150	0.2401	3.4	0.03411	8.9	0.09	233	75	216	19	219	7	98.9
11121016.d	Zr27.3	dark core	0.859	4303	295	0.32	83	0.2544	8.8	0.03332	9.6	-0.10	500	210	211	20	230	18	91.8
12121016.d	Zr28.2	core	0.236	3912	243	0.42	92	0.2311	5.9	0.03261	9.0	-0.03	292	136	207	18	211	11	98.0
16121016.d	Zr31.1	core	24.893	84910	5018	2.24	7177	1.2783	3.5	0.03660	8.9	0.68	3183	37	232	20	836	20	27.7	eliminated data (significant amount of common Pb)
17121016.d	Zr31.2	int. zoning	5.718	10281	356	0.15	154	0.8641	3.9	0.05997	9.1	0.76	1627	44	375	33	632	18	59.4	eliminated data (significant amount of common Pb)
18121016.d	Zr31.3	rim	0.178	17565	1204	0.05	35	0.2239	3.2	0.03142	8.9	0.11	264	69	199	17	205	6	97.2
19121016.d	Zr32.1	rim	0.120	34521	2305	0.09	195	0.2365	2.5	0.03314	8.8	0.11	254	50	210	18	216	5	97.5
20121016.d	Zr32.2	core	0.000	7578	456	0.45	201	0.2425	4.5	0.03483	8.9	0.05	202	103	221	19	220	9	100.1
21121016.d	Zr32.3	core	0.182	47959	3163	0.73	2150	0.2488	2.1	0.03426	8.8	0.15	283	35	217	19	226	4	96.3
22121016.d	Zr32.4	int. zoning	0.104	3957	264	0.21	56	0.2419	4.3	0.03436	9.0	0.07	255	98	218	19	220	8	99.0
23121016.d	Zr32.5	rim	0.175	31964	2399	0.05	88	0.2252	2.4	0.03138	8.8	0.18	263	43	199	17	206	4	96.6
27121016.d	Zr33.1	rim	1.207	39080	3005	0.12	321	0.2432	2.6	0.02953	8.9	0.12	584	50	188	16	221	5	84.9	eliminated data (significant amount of common Pb)
28121016.d	Zr33.2	rim	0.542	6185	435	0.32	124	0.2240	4.7	0.03053	9.0	-0.01	383	109	194	17	205	9	94.5
29121016.d	Zr33.3	core	0.000	219860	2290	0.09	1102	3.6842	1.9	0.21823	8.8	0.55	1983	18	1272	102	1568	15	79.1
30121016.d			58.969	70002	13017	1.50	9621	0.8232	2.1	0.01163	8.9	0.19	4284	24	75	7	610	9	12.2	eliminated data (significant amount of common Pb)
31121016.d			23.736	60594	6462	0.81	3519	0.7196	2.6	0.02205	8.9	0.33	3104	32	141	12	550	11	25.5	eliminated data (significant amount of common Pb)
32121016.d			44.416	72720	5125	0.84	7686	1.6619	1.7	0.02971	8.8	0.47	3924	12	189	16	994	11	19.0	eliminated data (significant amount of common Pb)