Citation:

epic.29585.d001

Name: Tab. 2: Average geochemical composition of dolerites from Neuschwabenland
Published: 1987
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

In western Neuschwabenland basic dikes occur in the Jurassic lavas and Permian sediments of Vestfjella as weil as in the Precambrian sedimentary-volcanogenic rock sequence of the Ahlmannryggen and in the Precambrian crystalline complexes of Heimefrontfjella and Mannefallknausane. The concentration of the dikes in Vestfjella is conspicuous. Two main directions of strike perpendicular to each other are recognizable, from which the NE-SW striking one is predominant. The direction of the dikes coincides with the Mesozoic and younger fracture tectonics. Age relationships by structural, petrographical and geochemical observations are confirmed by palaeomagnetic and radiometrie age determinations from PETERS et al. (1986). Considerations on the geochemistry of further dolerite occurrences from Antarctica and other regions of the Gondwana continent are pointed out. Finally comparisons with the analogous South African dike system show the geotectonic significance of the dolerite dikes for the break-up of Gondwana.

Coverage:

Median Latitude: -73.233333 * Median Longitude: -9.000000 * South-bound Latitude: -75.000000 * West-bound Longitude: -15.000000 * North-bound Latitude: -71.700000 * East-bound Longitude: -1.000000

Event(s):

Ahlmannryggen * Latitude Start: -72.000000 * Longitude Start: -3.000000 * Latitude End: -71.700000 * Longitude End: -1.000000 * Location: Ahlmannryggen, Neuschwabenland, Antarctica

Heimefrontfjella * Latitude Start: -74.200000 * Longitude Start: -13.000000 * Latitude End: -75.000000 * Longitude End: -9.000000 * Location: Heimefrontfjella, Antarctica

Vestfjella * Latitude Start: -73.000000 * Longitude Start: -15.000000 * Latitude End: -73.500000 * Longitude End: -13.000000 * Location: Vestfjella, Kraul Mountains, Neuschwabenland, Antarctica

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	-	-		Spaeth, Gerhard
3	Loss on ignition	LOI	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
4	Silicon dioxide	SiO2	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
5	Aluminium oxide	Al2O3	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
6	Calcium oxide	CaO	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
7	Magnesium oxide	MgO	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
8	Sodium oxide	Na2O	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
9	Potassium oxide	K2O	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
10	Titanium dioxide	TiO2	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
11	Iron oxide, Fe2O3	Fe2O3	%	Spaeth, Gerhard	X-ray fluorescence (XRF)	as whole iron
12	Manganese oxide	MnO	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
13	Phosphorus pentoxide	P2O5	%	Spaeth, Gerhard	X-ray fluorescence (XRF)
14	Barium	Ba	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
15	Strontium	Sr	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
16	Rubidium	Rb	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
17	Zirconium	Zr	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
18	Yttrium	Y	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
19	Vanadium	V	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
20	Chromium	Cr	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
21	Zinc	Zn	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
22	Nickel	Ni	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
23	Cobalt	Co	mg/kg	Spaeth, Gerhard	X-ray fluorescence (XRF)
24	Potassium/Rubidium ratio	K/Rb		Spaeth, Gerhard	Calculated
25	Potassium/Barium ratio	K/Ba		Spaeth, Gerhard

License:

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

Size:

216 data points

Data

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

1 Event	2 -	3 LOI [%]	4 SiO2 [%]	5 Al2O3 [%]	6 CaO [%]	7 MgO [%]	8 Na2O [%]	9 K2O [%]	10 TiO2 [%]	11 Fe2O3 [%]	12 MnO [%]	13 P2O5 [%]	14 Ba [mg/kg]	15 Sr [mg/kg]	16 Rb [mg/kg]	17 Zr [mg/kg]	18 Y [mg/kg]	19 V [mg/kg]	20 Cr [mg/kg]	21 Zn [mg/kg]	22 Ni [mg/kg]	23 Co [mg/kg]	24 K/Rb	25 K/Ba
Vestfjella	mean (22 samples)	1.68	48.76	13.37	10.43	6.96	2.38	0.53	1.78	13.61	0.18	0.19	397	269	20	137	25	289	275	73	149	46	241.70	10.79
Vestfjella	from	0.48	46.78	10.12	7.49	4.52	1.32	0.14	1.24	11.97	0.14	0.10	124	131	21	85	20	221	42	53	46	37	114.48	6.02
Vestfjella	to	3.67	52.99	15.37	13.44	11.23	3.16	1.06	4.00	19.71	0.20	0.51	1101	378	34	304	57	389	974	147	407	62	338.38	18.22
Ahlmannryggen	mean (27 samples)	2.27	47.86	10.59	9.40	10.24	2.00	0.52	2.72	14.84	0.19	0.29	273	303	30	181	29	396	666	127	481	72	226.11	23.90
Ahlmannryggen	from	0.77	43.11	6.87	5.25	5.05	1.09	0.12	1.39	13.25	0.17	0.10	101	36	21	89	20	301	94	111	57	51	131.42	10.56
Ahlmannryggen	to	5.45	52.20	14.43	13.18	19.15	3.49	0.97	5.51	16.81	0.22	0.73	641	757	47	503	53	507	1514	184	1363	109	489.49	76.98
Heimefrontfjella	mean (18 samples)	0.75	48.37	13.12	9.62	7.06	2.08	0.72	2.45	15.31	0.21	0.28	236	278	39	169	12	389	296	127	179	55	201.64	30.42
Heimefrontfjella	from	0.05	44.25	8.69	6.56	3.53	1.12	0.13	0.92	9.66	0.13	0.07	122	187	20	55	7	188	61	93	38	40	121.76	22.06
Heimefrontfjella	to	2.52	58.49	15.86	12.56	22.54	3.09	1.92	4.53	20.13	0.25	0.54	516	518	78	283	25	594	1462	184	1238	97	288.20	41.73