Geofluids

Research Article

Paleo-Hydrothermal Predecessor to Perennial Spring Activity in Thick Permafrost in the Canadian High Arctic, and Its Relation to Deep Salt Structures: Expedition Fiord, Axel Heiberg Island, Nunavut

Table 1

Apatite fission track data used for Figure 4.


	Age data								Length data
Sample number	Grains counted								Age ± error (Ma, 1σ)	No. of tracks	Mean ± error (μm, 2σ)	Std. dev. (μm)

ft03-038 SF-16	28	0.168	196	0.423	495	98	1.093	5701	75.0 ± 6.6	49	13.50 ± 0.41	1.43
ft03-041 SF-20	25	0.073	127	0.294	509	100	1.093	5701	47.9 ± 4.8	55	13.91 ± 0.31	1.16
ft03-042 SF-23	25	0.062	126	0.242	489	100	1.093	5701	49.4 ± 5.0	37	13.62 ± 0.49	1.48
ft03-046 SF-27	28	0.101	115	0.379	428	100	1.093	5701	51.6 ± 5.5	57	14.13 ± 0.21	0.79
ft03-047 SF-28	27	0.092	113	0.372	457	81	1.093	5701	47.5 ± 5.2	107	14.05 ± 0.23	1.2
ft03-048 SF-30	25	0.153	159	0.487	505	99	1.093	5701	60.4 ± 5.5	129	13.45 ± 0.33	1.88
ft03-052 SF-36	26	0.911	1299	2.65	3777	1.3	1.093	5701	65.4 ± 3.2	148	14.03 ± 0.25	0.11
ft03-055 SF-41	24	1.101	665	3.5	2114	22	1.093	5701	60.3 ± 3.0	140	13.86 ± 0.22	1.29
ft03-059 SF-47	28	0.712	563	2.49	1967	24	1.093	5701	54.9 ± 2.7	118	13.47 ± 0.32	1.77
ft03-063 SF-51	23	0.167	136	0.667	543	98	1.093	5701	48.1 ± 4.7	25	13.49 ± 0.64	1.54
ft03-067 SF-66	29	0.177	157	0.823	729	39	1.093	5701	41.4 ± 3.8	37	12.51 ± 0.45	1.36
ft04-009 SF-59	28	0.063	67	0.297	315	99	1.093	5701	40.8 ± 5.5	25	12.92 ± 0.65	1.57

A summary of the age and track length data for the Strand Fiord region. Ages reported are the central age [139]. Samples with a chi-square probability greater than 5 pass the chi-square test at the 95% confidence level (i.e., appear to be composed of one age population). N_s, N_¡, and N_d are the number of spontaneous, induced, and flux dosimeter (CN-5) tracks, respectively. Rho_s, Rho_¡, Rho_d are the density of spontaneous, induced, and dosimeter tracks, respectively (×10⁶/cm²). A value of 352.5 ± 7.1 (CN-5) was used for the zeta factor. Age error estimates are at the 67% (1σ) confidence level. Mean length error estimates are at the 95% (2σ) confidence level. Alexander M. Grist, Analyst.