Citation:

epic.33326.d001

Name: Tab. 1: U-Pb analyses of zircons from rock samples in MT. Newton and Cumpston Massif, East Antarctica
Published: 2009
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

We present new U-Pb zircon (SHRIMP) data on rocks from Mt Newton and Cumpston Massif in the southern Prince Charles Mountains. Our data demonstrate that Mt Newton was affected by a newly proposed Palaeoproterozoic "Newton" Orogeny at c. 2100-2200 Ma. Sedimentation, felsic volcanism (c. 2200 Ma), metamorphism and folding, followed by granite intrusion (c. 2100 Ma), suggest development of a trough or aulacogene in the area during the early Palaeoproterozoic. An orthogneiss from Cumpston Massif yielded an age of c. 3180 Ma for granitic protolith emplacement, which is in good agreement with many U-Pb zircon ages from similar rocks in the southern Mawson Escarpment. A syn- to late-tectonic muscovite-bearing pegmatite from Cumpston Massif yielded a c. 2500 Ma date of emplacement, which indicates early Palaeoproterozoic activity in this block, probably in response to a tectono-magmatic episode in the Lambert Terrane bordering the Ruker Terrane in the northeast. The correlation of tectono-magmatic events in both the Ruker and Lambert terranes of the southern Prince Charles Mountains provides evidence for their common evolution during the Proterozoic.

Coverage:

Median Latitude: -73.775000 * Median Longitude: 66.095000 * South-bound Latitude: -73.950000 * West-bound Longitude: 65.300000 * North-bound Latitude: -73.550000 * East-bound Longitude: 67.000000

Minimum ORDINAL NUMBER: 1.1 * Maximum ORDINAL NUMBER: 12.1

Event(s):

48140-1 * Latitude: -73.650000 * Longitude: 66.680000 * Location: Cumpston Massif, Prince Charles Mountains, East Antarctica * Campaign: (Prince Charles Mountains Expeditin of Germany and Australia) * Basis: Sampling on land * Method/Device: Geological sample (GEOS)

48145-2 * Latitude: -73.950000 * Longitude: 65.300000 * Location: Mt. Newton, Prince Charles Mountains, East Antarctica * Campaign: (Prince Charles Mountains Expeditin of Germany and Australia) * Basis: Sampling on land * Method/Device: Geological sample (GEOS)

48148-6 * Latitude: -73.950000 * Longitude: 65.400000 * Location: Mt. Newton, Prince Charles Mountains, East Antarctica * Campaign: (Prince Charles Mountains Expeditin of Germany and Australia) * Basis: Sampling on land * Method/Device: Geological sample (GEOS)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	ORDINAL NUMBER	Ord No				Geocode
3	Material	Material		Mikhalsky, Evgeny V
4	Lead-206	206Pb	mg/kg	Mikhalsky, Evgeny V		common portion
5	Uranium	U	mg/kg	Mikhalsky, Evgeny V
6	Thorium	Th	mg/kg	Mikhalsky, Evgeny V
7	Thorium-232/Uranium-238 ratio	232Th/238U		Mikhalsky, Evgeny V
8	Lead-206	206Pb	mg/kg	Mikhalsky, Evgeny V		radiogenic portion
9	Age, dated	Age dated	ka	Mikhalsky, Evgeny V	Age, 238U/206Pb Uranium-Lead
10	Discordance	D	%	Mikhalsky, Evgeny V		D=100*{[age(207/206)]/[age(206/238)]-1}
11	Lead-207/Uranium-235 ratio	207Pb/235U		Mikhalsky, Evgeny V
12	Lead-207/Uranium-235, error	207Pb/235U e	±	Mikhalsky, Evgeny V		1 sigma
13	Lead-206/Uranium-238 ratio	206Pb/238U		Mikhalsky, Evgeny V
14	Lead-206/Uranium-238, error	206Pb/238U e	±	Mikhalsky, Evgeny V		1 sigma
15	Error correction	E cor		Mikhalsky, Evgeny V

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

451 data points

Data

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

1 Event	2 Ord No	3 Material	4 206Pb [mg/kg] (common portion)	5 U [mg/kg]	6 Th [mg/kg]	7 232Th/238U	8 206Pb [mg/kg] (radiogenic portion)	9 Age dated [ka]	10 D [%] (D=100*{[age(207/206)]/[age(20...)	11 207Pb/235U	12 207Pb/235U e [±] (1 sigma)	13 206Pb/238U	14 206Pb/238U e [±] (1 sigma)	15 E cor
48148-6	1.1	Felsic gneiss	2900	537	2	0.00	182	2134000	0	7.14	1.70	0.3925	0.89	0.515
48148-6	2.1	Felsic gneiss	5400	664	3	0.00	229	2167000	-2	7.29	1.80	0.3995	0.83	0.464
48148-6	3.1	Felsic gneiss	4900	601	73	0.13	218	2257000	-1	8.17	1.60	0.4193	0.85	0.515
48148-6	4.1	Felsic gneiss	3500	719	86	0.12	232	2051000	8	7.18	1.40	0.3746	0.79	0.548
48148-6	5.1	Felsic gneiss	1000	830	60	0.07	264	2024000	9	7.06	1.30	0.3689	0.86	0.660
48148-6	6.1	Felsic gneiss	4900	831	5	0.01	290	2187000	-5	7.20	1.80	0.4038	0.86	0.477
48148-6	7.1	Felsic gneiss	16200	450	24	0.05	132	1866000	7	5.68	3.90	0.3357	1.10	0.284
48148-6	8.1	Felsic gneiss	3200	556	1	0.00	202	2122000	0	7.15	1.70	0.3922	0.89	0.455
48148-6	9.1	Felsic gneiss	4800	861	2	0.01	224	2187000	0	7.62	1.70	0.4038	0.86	0.466
48148-6	10.1	Felsic gneiss	1300	782	78	0.10	244	2151000	6	7.72	1.40	0.3974	0.82	0.568
48148-6	11.1	Felsic gneiss	5200	611	74	0.13	221	2217000	2	8.01	1.50	0.4073	0.84	0.515
48148-6	12.1	Felsic gneiss	5600	764	2	0.00	235	2089000	6	7.66	2.70	0.3972	0.83	0.344
48145-2	2.1	Granite	2100	2571	30	0.01	831	2054800	2	6745.00	0.43	0.3754	0.25	0.590
48145-2	1.1	Granite	2900	2444	32	0.01	799	2072800	2	6861.00	0.46	0.3793	0.29	0.633
48145-2	6.1	Granite	2700	2316	52	0.02	759	2079100	1	6837.00	0.45	0.3806	0.30	0.668
48145-2	3.1	Granite	700	2111	96	0.05	695	2090600	2	6984.00	0.40	0.3831	0.26	0.658
48145-2	5.1	Granite	1900	2453	54	0.02	813	2100000	1	6969.00	0.52	0.3851	0.42	0.804
48145-2	4.1	Granite	100	7729	114	0.02	3	2199100	-3	7409.00	0.26	0.4065	0.21	0.798
48140-1	1.1	Granite-gneiss		226	123	0.56	111	2912000	7	18.88	2.10	0.5710	1.90	0.874
48140-1	2.1	Granite-gneiss	800	191	92	0.50	100	3069000	3	20.68	2.10	0.6100	1.90	0.902
48140-1	3.1	Granite-gneiss	600	213	89	0.43	90	2584000	15	14.96	2.00	0.4930	1.90	0.932
48140-1	4.1	Granite-gneiss	200	255	132	0.53	101	2444000	22	13.93	2.40	0.4610	2.30	0.944
48140-1	5.1	Granite-gneiss		1144	667	0.60	495	2629000	22	17.56	1.80	0.5037	1.80	0.970
48140-1	6.1	Granite-gneiss		226	120	0.55	122	3152000	1	21.80	1.90	0.6310	1.80	0.960
48140-1	7.1	Granite-gneiss	300	194	104	0.55	109	3249000	-2	22.36	2.00	0.6550	1.90	0.954
48140-1	8.1	Granite-gneiss	100	1308	731	0.58	487	2322000	32	13.84	2.00	0.4336	2.00	0.989
48140-1	9.1	Granite-gneiss		227	105	0.48	129	3270000	-3	22.59	2.00	0.6610	1.90	0.961
48149-5	3.2	Pegmatite	200	3485	9	0.00	699	1352600	24	3481.00	0.45	0.2334	0.29	0.649
48149-5	5.2	Pegmatite	100	3821	14	0.00	827	1448000	21	3901.00	0.38	0.2518	0.26	0.685
48149-5	4.2	Pegmatite	300	3871	10	0.00	881	1515000	20	4209.00	0.53	0.2649	0.25	0.474
48149-5	3.1	Pegmatite	200	2418	773	0.33	725	1928500	16	6977.00	0.42	0.3487	0.29	0.691
48149-5	4.1	Pegmatite	3600	301	36	0.12	106	2210000	8	8.79	1.20	0.4088	0.70	0.605
48149-5	5.1	Pegmatite	20100	1145	358	0.32	419	2246700	7	9.04	1.10	0.4170	0.43	0.374
48149-5	2.1	Pegmatite	5400	457	21	0.05	167	2273000	7	9307.00	0.91	0.4228	0.57	0.627
48149-5	1.1	Pegmatite	2900	397	28	0.07	146	2286000	6	9228.00	0.84	0.4256	0.52	0.625