Citation:

j.gca.2018.11.021

Name: Secondary ion mass spectrometry (SIMS) Uranium-Lead analyses of shock-recrystallised zircon from the Lappajärvi impact crater, Finland
Published: 2019-09-18
License: https://creativecommons.org/licenses/by/4.0/
Keywords: EBSD; impact cratering; Lappajarvi; shock metamorphism; shock-recrystallised zircon; SIMS; U-Pb

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Published: 2019-09-18 • DOI registered: 2019-09-20

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Abstract:

U-Pb data for shock-recrystallised zircon from the Lappajärvi impact crater, Finland.

Keyword(s):

EBSD; impact cratering; Lappajarvi; shock metamorphism; shock-recrystallised zircon; SIMS; U-Pb

Further details:

Stacey, John S; Kramers, Jan Dirk (1975): Approximation of terrestrial lead isotope evolution by a two-stage model. Earth and Planetary Science Letters, 26(2), 207-221, https://doi.org/10.1016/0012-821X(75)90088-6

Coverage:

Latitude: 63.180000 * Longitude: 23.600000

Event(s):

n5747 (Karnaite impact melt rock, Lappajarvi) * Latitude: 63.180000 * Longitude: 23.600000 * Location: Finland * Method/Device: Rock sample (ROCK)

Comment:

* Discordance here refers to the calculated difference between the ²⁰⁶Pb/²³⁸U age and the ²⁰⁷Pb/²³⁵U age, i.e., discordance = (1 - [²⁰⁶Pb/²³⁸U age / ²⁰⁷Pb/²³⁵U age]) x 100. Therefore, positive numbers correspond to normal discordance and negative numbers correspond to reverse discordance.

** % of common ²⁰⁶Pb in measured ²⁰⁶Pb, estimated from measured ²⁰⁴Pb, assuming present-day Stacey and Kramers (1975) common Pb. Figures lagged with # indicate that no correction has been applied because ²⁰⁴Pb counts were insignificant.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Kenny, Gavin
2	Sample ID	Sample ID		Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
3	Comment	Comment		Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
4	Identification	ID		Kenny, Gavin	Secondary ion mass spectrometry (SIMS)	Session ID
5	Size	Size	µm	Kenny, Gavin	Secondary ion mass spectrometry (SIMS)	Spot size
6	Uranium	U	mg/kg	Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
7	Thorium	Th	mg/kg	Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
8	Lead	Pb	mg/kg	Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
9	Thorium/Uranium ratio	Th/U		Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
10	Lead-207/Uranium-235 ratio	207Pb/235U		Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
11	Lead-207/Uranium-235 ratio, error, relative	207Pb/235U e rel	%	Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
12	Lead-206/Uranium-238 ratio	206Pb/238U		Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
13	Lead-206/Uranium-238 ratio, error, relative	206Pb/238U e rel	%	Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
14	Correlation coefficient, isotope ratio error	Rho		Kenny, Gavin		7/35-6/38 rho
15	Lead-207/Lead-206 ratio	207Pb/206Pb		Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
16	Lead-207/Lead-206 ratio, error, relative	207Pb/206Pb e rel	%	Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
17	Discordance	D	%	Kenny, Gavin		See comment *
18	Age, mineral	Age mineral	Ma	Kenny, Gavin	Age, 207Pb/235U Lead-Uranium	²⁰⁷Pb/²³⁵U age
19	Age, error, relative	Age e rel	%	Kenny, Gavin	Age, 207Pb/235U Lead-Uranium	²⁰⁷Pb/²³⁵U age e rel
20	Age, mineral	Age mineral	Ma	Kenny, Gavin	Age, 206Pb/238U Lead-Uranium	²⁰⁶Pb/²³⁸U age
21	Age, error, relative	Age e rel	%	Kenny, Gavin	Age, 206Pb/238U Lead-Uranium	²⁰⁶Pb/²³⁸U age e rel
22	Age, mineral	Age mineral	Ma	Kenny, Gavin	Age, 207Pb/206Pb Lead-Lead	²⁰⁷Pb/²⁰⁶Pb age
23	Age, error, relative	Age e rel	%	Kenny, Gavin	Age, 207Pb/206Pb Lead-Lead	²⁰⁷Pb/²⁰⁶Pb age e rel
24	Lead-206/Lead-204 ratio	206Pb/204Pb		Kenny, Gavin	Secondary ion mass spectrometry (SIMS)
25	Common 206Pb in total 206Pb	f206	%	Kenny, Gavin		See comment **
26	Texture	Texture		Kenny, Gavin

License:

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

Size:

814 data points

Data

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

1 Event	2 Sample ID (Secondary ion mass spectromet...)	3 Comment (Secondary ion mass spectromet...)	4 ID (Session ID, Secondary ion mas...)	5 Size [µm] (Spot size, Secondary ion mass...)	6 U [mg/kg] (Secondary ion mass spectromet...)	7 Th [mg/kg] (Secondary ion mass spectromet...)	8 Pb [mg/kg] (Secondary ion mass spectromet...)	9 Th/U (Secondary ion mass spectromet...)	10 207Pb/235U (Secondary ion mass spectromet...)	11 207Pb/235U e rel [%] (Secondary ion mass spectromet...)	12 206Pb/238U (Secondary ion mass spectromet...)	13 206Pb/238U e rel [%] (Secondary ion mass spectromet...)	14 Rho (7/35-6/38 rho)	15 207Pb/206Pb (Secondary ion mass spectromet...)	16 207Pb/206Pb e rel [%] (Secondary ion mass spectromet...)	17 D [%] (See comment *)	18 Age mineral [Ma] (²⁰⁷Pb/²³⁵U age, Age, 207Pb/23...)	19 Age e rel [%] (²⁰⁷Pb/²³⁵U age e rel, Age, 20...)	20 Age mineral [Ma] (²⁰⁶Pb/²³⁸U age, Age, 206Pb/23...)	21 Age e rel [%] (²⁰⁶Pb/²³⁸U age e rel, Age, 20...)	22 Age mineral [Ma] (²⁰⁷Pb/²⁰⁶Pb age, Age, 207Pb/2...)	23 Age e rel [%] (²⁰⁷Pb/²⁰⁶Pb age e rel, Age, 2...)	24 206Pb/204Pb (Secondary ion mass spectromet...)	25 f206 [%] (See comment **)	26 Texture
n5747	n5747-z2a	U-Pb data for unknowns	1 (June 2017)	10	1437	216	19	0.15	0.076	5.4	0.0123	1.5	0.28	0.0449	5.2	-5.7	75	4	79	1	-60	122	1459	1.28	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z2b	U-Pb data for unknowns	2 (July 2017)	10	1749	279	23	0.16	0.080	5.2	0.0121	1.3	0.26	0.0480	5.0	0.9	78	4	77	1	99	114	1409	1.33	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z2c	U-Pb data for unknowns	3 (August 2018)	10	1509	246	20	0.16	0.079	3.2	0.0123	1.5	0.48	0.0465	2.8	-2.3	77	2	79	1	23	68	2794	0.67	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z2d	U-Pb data for unknowns	3 (August 2018)	10	2081	334	28	0.16	0.081	2.3	0.0123	1.5	0.64	0.0478	1.8	0.4	79	2	79	1	89	42	4000	0.47	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z2e	U-Pb data for unknowns	3 (August 2018)	10	1655	267	22	0.16	0.083	3.2	0.0123	1.5	0.46	0.0489	2.9	2.5	81	3	79	1	142	68	2679	0.70	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z3a	U-Pb data for unknowns	1 (June 2017)	10	2039	95	26	0.05	0.080	2.4	0.0122	1.4	0.59	0.0478	2.0	0.4	78	2	78	1	88	46	12728	0.15	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z3b	U-Pb data for unknowns	1 (June 2017)	10	2385	130	58	0.05	0.236	4.2	0.0225	3.7	0.90	0.0762	1.8	33.4	215	8	143	5	1100	36	26159	0.07	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z3c	U-Pb data for unknowns	2 (July 2017)	10	1975	94	25	0.05	0.078	6.3	0.0120	1.4	0.23	0.0474	6.1	-0.2	77	5	77	1	72	139	607	3.08	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z3d	U-Pb data for unknowns	3 (August 2018)	10	1285	76	16	0.06	0.078	2.3	0.0119	1.2	0.53	0.0476	1.9	0.2	77	2	76	1	81	46	7224	0.26	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z3e	U-Pb data for unknowns	3 (August 2018)	10	2176	107	31	0.05	0.102	4.2	0.0130	2.1	0.50	0.0570	3.6	15.7	99	4	83	2	492	80	929	2.01	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z3f	U-Pb data for unknowns	3 (August 2018)	10	2328	118	32	0.05	0.092	2.0	0.0131	1.0	0.53	0.0509	1.7	6.1	89	2	84	1	238	38	4434	0.42	Granular - multiple domains of similarly oriented neoblasts
n5747	n5747-z4a	U-Pb data for unknowns	1 (June 2017)	10	4762	772	66	0.16	0.090	2.7	0.0126	1.9	0.72	0.0518	1.9	7.8	87	2	80	2	277	42	2953	0.63	Granular - all neoblasts share one orientation
n5747	n5747-z4b	U-Pb data for unknowns	2 (July 2017)	10	2202	342	38	0.16	0.136	4.0	0.0154	1.8	0.46	0.0641	3.5	24.0	130	5	99	2	745	72	1033	1.81	Granular - all neoblasts share one orientation
n5747	n5747-z4c	U-Pb data for unknowns	3 (August 2018)	10	2260	414	43	0.18	0.154	4.5	0.0171	1.6	0.35	0.0652	4.2	24.7	145	6	109	2	780	88	1143	1.64	Granular - all neoblasts share one orientation
n5747	n5747-z4d	U-Pb data for unknowns	3 (August 2018)	10	3221	616	50	0.19	0.109	3.1	0.0140	1.8	0.57	0.0564	2.5	14.6	105	3	90	2	469	56	1561	1.20	Granular - all neoblasts share one orientation
n5747	n5747-z5	U-Pb data for unknowns	1 (June 2017)	10	906	964	202	1.06	3.667	4.2	0.1451	3.8	0.90	0.1833	1.8	44.2	1564	34	874	31	2683	30	8367	0.22	Partial granular but analysis not on granular region
n5747	n5747-z6a	U-Pb data for unknowns	1 (June 2017)	10	523	202	106	0.39	2.706	1.7	0.1638	1.5	0.88	0.1198	0.8	26.5	1330	12	978	13	1953	14	9093	0.21	Partial granular but analysis not on granular region
n5747	n5747-z6b	U-Pb data for unknowns	2 (July 2017)	10	1040	124	91	0.12	1.108	4.9	0.0742	4.8	0.98	0.1083	1.0	39.1	757	26	461	21	1772	18	6015	0.31	Partial granular but analysis not on granular region
n5747	n5747-z8	U-Pb data for unknowns	1 (June 2017)	10	1300	59	116	0.05	1.123	3.0	0.0802	2.6	0.88	0.1017	1.4	35.0	765	16	497	13	1654	26	20539	0.09	Partial granular but analysis not on granular region
n5747	n5747-z11	U-Pb data for unknowns	1 (June 2017)	10	962	73	141	0.08	1.938	2.7	0.1305	2.6	0.97	0.1077	0.6	27.8	1094	18	791	20	1761	11	15126	0.12	No clear shock features
n5747	n5747-z13	U-Pb data for unknowns	1 (June 2017)	10	931	93	43	0.10	0.536	2.3	0.0397	2.0	0.87	0.0980	1.1	42.4	436	8	251	5	1586	21	9156	0.20	Partial granular but analysis not on granular region
n5747	n5747-z17	U-Pb data for unknowns	1 (June 2017)	10	279	212	114	0.76	5.019	1.8	0.2991	1.6	0.89	0.1217	0.8	7.4	1822	16	1687	24	1981	15	>1000000	#0.00	Partial granular but analysis not on granular region
	Tem2_U-Pb_2093@1	standard zircon Temora 2	1 (June 2017)	10	77	26	6	0.34	0.486	4.0	0.0697	1.9	0.48	0.0505	3.5	-8.0	402	13	434	8	220	80	>1000000	#0.00
	Tem2_U-Pb_2093@2	standard zircon Temora 3	1 (June 2017)	10	70	25	5	0.36	0.538	4.9	0.0667	2.4	0.49	0.0585	4.3	4.8	437	17	416	10	548	90	>1000000	#0.00
	Tem2_U-Pb_2093@3	standard zircon Temora 4	1 (June 2017)	10	113	34	9	0.30	0.507	3.9	0.0678	1.8	0.48	0.0542	3.4	-1.6	416	13	423	8	378	75	>1000000	#0.00
	Tem2_U-Pb_2094@1	standard zircon Temora 5	2 (July 2017)	10	89	33	7	0.37	0.512	3.5	0.0664	1.6	0.46	0.0560	3.1	1.3	420	12	414	6	450	68	>1000000	#0.00
	Tem2_U-Pb_2094@2	standard zircon Temora 6	2 (July 2017)	10	126	37	10	0.29	0.514	2.9	0.0673	1.5	0.51	0.0554	2.5	0.2	421	10	420	6	427	55	>1000000	#0.00
	Tem2_U-Pb_2094@3	standard zircon Temora 7	2 (July 2017)	10	118	37	9	0.31	0.484	3.5	0.0672	1.5	0.43	0.0523	3.2	-4.6	401	12	419	6	297	71	>1000000	#0.00
	Tem2_U-Pb_2094@4	standard zircon Temora 8	2 (July 2017)	10	144	72	12	0.50	0.509	2.8	0.0668	1.5	0.54	0.0552	2.3	0.2	418	10	417	6	421	51	>1000000	#0.00
	Tem2_U-Pb_2094@5	standard zircon Temora 9	2 (July 2017)	10	115	57	9	0.50	0.518	3.0	0.0674	1.5	0.51	0.0558	2.6	0.8	424	10	420	6	443	57	>1000000	#0.00
	Tem2_U-Pb_2147@1	standard zircon Temora 10	3 (August 2018)	10	147	74	12	0.51	0.499	2.7	0.0678	1.2	0.46	0.0533	2.4	-3.0	411	9	423	5	342	54	6095	0.31
	Tem2_U-Pb_2147@2	standard zircon Temora 11	3 (August 2018)	10	88	30	7	0.35	0.507	2.6	0.0668	1.4	0.52	0.0550	2.2	-0.1	417	9	417	6	414	50	10415	#0.00
	Tem2_U-Pb_2147@3	standard zircon Temora 12	3 (August 2018)	10	127	31	10	0.24	0.495	2.6	0.0668	1.2	0.49	0.0537	2.2	-2.2	408	9	417	5	357	50	8714	0.21