Citation:

PANGAEA.938031

Name: Fission-track age determination of the Southern Malawi Rift from rock sample IE0500008 (Z 22 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: -15.493750 * Longitude: 35.147600

Event(s):

IE0500008 * Latitude: -15.493750 * Longitude: 35.147600 * Location: Malawi * Method/Device: Rock sample (ROCK)

Comment:

Sample Number: Z 22

Position (#): 18

Area of Graticule Square: 6.400E-07

No. of Crystals: 20

Zeta Factor ±Error: 305.8 ±8.4

Rho d (% Relative Error): 1.442E+06

N d: 4616

Mineral: Apatite

Glass (U ppm): 15

Irradiation: UA-A39

Analyst: Oyewande Ojo

Locality: Malawi

Rock Type: Slightly foliated granite

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)
58	133	25	1.81	0.50	3.63E6	8.31E6	0.4361	86.5	95.44	15.31
71	160	40	1.68	0.50	2.77E6	6.25E6	0.4438	65.0	97.10	14.17
62	166	25	1.79	0.50	3.88E6	1.04E7	0.3735	107.9	81.83	12.44
58	175	60	1.53	0.50	1.51E6	4.56E6	0.3314	47.4	72.66	11.24
35	119	25	1.81	0.50	2.19E6	7.44E6	0.2941	77.4	64.52	12.57
23	79	28	1.47	0.50	1.28E6	4.41E6	0.2911	45.9	63.87	15.26
83	184	50	1.86	0.50	2.59E6	5.75E6	0.4511	59.8	98.70	13.41
44	137	30	1.57	0.50	2.29E6	7.14E6	0.3212	74.2	70.43	12.40
52	136	32	1.86	0.50	2.54E6	6.64E6	0.3824	69.1	83.76	13.90
66	202	50	1.59	0.50	2.06E6	6.31E6	0.3267	65.7	71.64	10.40
30	100	40	1.66	0.50	1.17E6	3.91E6	0.3000	40.6	65.81	13.85
52	153	40	1.60	0.50	2.03E6	5.98E6	0.3399	62.2	74.50	12.18
33	86	25	1.79	0.50	2.06E6	5.38E6	0.3837	55.9	84.05	17.41
49	142	50	1.66	0.31	1.53E6	4.44E6	0.3451	46.2	75.64	12.75
58	138	40	1.50	0.50	2.27E6	5.39E6	0.4203	56.1	92.01	14.68
49	157	30	1.87	0.50	2.55E6	8.18E6	0.3121	85.1	68.45	11.40
27	96	25	1.77	0.50	1.69E6	6.00E6	0.2813	62.4	61.71	13.58
94	237	25	1.47	0.50	5.88E6	1.48E7	0.3966	154.1	86.86	10.93
82	180	50	1.80	0.50	2.56E6	5.63E6	0.4556	58.5	99.67	13.64
55	153	50	1.59	0.50	1.72E6	4.78E6	0.3595	49.7	78.77	12.63