Citation:

PANGAEA.938031

Name: Fission-track age determination of the Southern Malawi Rift from rock sample IE0500004 (LM 7 AFT Age)
Published: 2021-11-10
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Apatite fission track (AFT); low-temperature thermochronology; Malawi Rift; Rift initiation; Shire Rift; Strain accommodation

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Published: 2021-11-10 • DOI registered: 2022-05-09

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Keyword(s):

Apatite fission track (AFT); low-temperature thermochronology; Malawi Rift; Rift initiation; Shire Rift; Strain accommodation

Related to:

Ojo, Oyewande; Thomson, Stuart N; Laó-Dávila, Daniel A (2024): Neogene–Quaternary initiation of the Southern Malawi Rift and linkage to the reactivated Carboniferous–Jurassic Shire Rift. Tectonophysics, 877, 230270, https://doi.org/10.1016/j.tecto.2024.230270

Coverage:

Latitude: -14.670867 * Longitude: 35.167600

Event(s):

IE0500004 * Latitude: -14.670867 * Longitude: 35.167600 * Location: Malawi * Method/Device: Rock sample (ROCK)

Comment:

Sample Number: LM 7

Position (#): 18

Area of Graticule Square: 6.400E-07

No. of Crystals: 20

Zeta Factor ±Error: 305.8 ±8.4

Rho d (% Relative Error): 1.594E+06

N d: 5101

Mineral: Apatite

Glass (U ppm): 15

Irradiation: UA-A39

Analyst: Oyewande Ojo

Locality: Malawi

Rock Type: Gneiss

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Fission-tracks, spontaneous	N s	#	Ojo, Oyewande	Fission-track
2	Fission-tracks, induced	N i	#	Ojo, Oyewande	Fission-track
3	Number of squares	N square	#	Ojo, Oyewande	Fission-track	Number of squares of the microscope grid in which tracks were counted
4	Diameter	Ø	µm	Ojo, Oyewande	Fission-track	Dpar - mean etch pit diameter parallel to the c-axis for each grain
5	Diameter	Ø	µm	Ojo, Oyewande	Fission-track	Dpar - mean etch pit diameter perpendicular to the c-axis for each grain
6	Fission-tracks, spontaneous, density	p s	10⁶ #/cm²	Ojo, Oyewande	Fission-track
7	Fission-tracks, induced, density	p i	10⁶ #/cm²	Ojo, Oyewande	Fission-track
8	Ratio	Ratio		Ojo, Oyewande	Calculated	p s/p i
9	Uranium	U	mg/kg	Ojo, Oyewande	Fission-track	Derived from the ratio between N s/N i
10	Age, mineral	Age mineral	Ma	Ojo, Oyewande	Age, fission-track	Single grain age
11	Age, standard error	Age std e	±	Ojo, Oyewande	Age, fission-track	1 σ

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

220 data points

Data

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

1 N s [#] (Fission-track)	2 N i [#] (Fission-track)	3 N square [#] (Number of squares of the micr...)	4 Ø [µm] (Dpar - mean etch pit diameter...)	5 Ø [µm] (Dpar - mean etch pit diameter...)	6 p s [10⁶ #/cm²] (Fission-track)	7 p i [10⁶ #/cm²] (Fission-track)	8 Ratio (p s/p i, Calculated)	9 U [mg/kg] (Derived from the ratio betwee...)	10 Age mineral [Ma] (Single grain age, Age, fissio...)	11 Age std e [±] (1 σ, Age, fission-track)
75	155	60	1.76	0.50	1.95E6	4.04E6	0.4839	38.0	116.86	16.83
99	176	60	1.83	0.50	2.58E6	4.58E6	0.5625	43.1	135.66	17.55
94	189	64	2.06	0.50	2.30E6	4.61E6	0.4974	43.4	120.09	15.60
113	213	80	2.11	0.50	2.21E6	4.16E6	0.5305	39.1	128.02	15.41
43	104	35	1.97	0.50	1.92E6	4.64E6	0.4135	43.7	99.99	18.39
72	164	50	2.37	0.50	2.25E6	5.13E6	0.4390	48.2	106.12	15.36
108	185	40	2.12	0.50	4.22E6	7.23E6	0.5838	68.0	140.73	17.59
80	150	42	2.29	0.50	2.98E6	5.58E6	0.5333	52.5	128.69	18.25
80	150	45	2.20	0.50	2.78E6	5.21E6	0.5333	49.0	128.69	18.25
76	138	40	2.37	0.50	2.97E6	5.39E6	0.5507	50.7	132.85	19.41
54	106	36	1.85	0.50	2.34E6	4.60E6	0.5094	43.3	122.98	20.91
81	135	50	2.52	0.50	2.53E6	4.22E6	0.6000	39.7	144.60	20.81
59	105	32	1.93	0.50	2.88E6	5.13E6	0.5619	48.2	135.51	22.44
50	80	32	2.39	0.31	2.44E6	3.91E6	0.6250	36.8	150.55	27.54
51	80	70	2.33	0.50	1.14E6	1.79E6	0.6375	16.8	153.53	27.92
64	108	50	1.90	0.50	2.00E6	3.38E6	0.5926	31.8	142.83	22.96
56	130	36	2.40	0.50	2.43E6	5.64E6	0.4308	53.1	104.14	16.95
91	186	50	1.99	0.50	2.84E6	5.81E6	0.4892	54.7	118.15	15.55
66	110	40	2.14	0.50	2.58E6	4.30E6	0.6000	40.4	144.60	22.95
104	271	100	1.90	0.50	1.63E6	4.23E6	0.3838	39.8	92.86	11.09