Inflation and collapse of the Wai’anae volcano (Oahu, Hawaii, USA): implications from rock magnetic properties and magnetic fabric data of dikes

Earth, Planets and Space

Table 1 Geometry of the dikes and mean AMS data

Area	Dike #	Dike thickness (m)	Dike orientation strike (°)/dip (°)	MZA D (°)/I (°)	Site	n	K_m 10⁻³ SI	K1 D (°)/I (°)	K3 D (°)/I (°)	P′	T	Fabric type
1	DK6	2.5	145/90W		DK6W	23	36.8	88/52	315/28	1.007	0.20	Int
					DK6 E	16	37.4	102/83	356/2	1.011	− 0.07	Int
2	DK2	2.5	96/85S	119/24	DK2W	5	36.3	256/58	113/26	1.011	0.63	Int
					DK2WL	6	19.3	272/61	121/25	1.015	0.47	Int
					DK2M	16	35.5	298/60	31/2	1.012	0.71	N
					DK2E	5	39.5	111/15	201/3	1.015	0.34	N
	DK3	2	96/85S	143/23	DK3W	12	23.4	330/43	114/41	1.007	− 0.35	Int
					DK3M	10	6.6	222/82	48/8	1.009	− 0.07	N
					DK3 E	13	20.5	38/11	133/24	1.013	− 0.08	Inv
	DK4	0.8	352/46E	71/61	DK4W	10	2.8	97/74	247/13	1.005	0.44	N
					DK4M	7	3.1	98/55	256/33	1.007	0.50	N
					DK4 E	12	2.7	113/61	238/18	1.005	− 0.26	N
3	DK1	1	15/90	181/74	DK1W	5	11.6	214/68	308/0	1.008	0.29	N
					DK1M	11	9.8	186/69	322/16	1.012	− 0.88	N
					DK1 E	7	11.9	184/71	87/2	1.009	0.63	N
	DK5	0.4	350/90	177/35	DK5W	13	2432	242/50	357/20	1.002	− 0.10	N
					DK5M	5	2335	323/66	83/13	1.003	− 0.35	N
					DK5 E	8	3560	169/27	265/11	1.008	− 0.38	N
	DK7	0.5	190/52W	208/6	DK7W	14	5817	264/32	114/41	1.009	0.77	N
					DK7M	8	5874	241/29	48/8	1.007	0.40	N
					DK7 E	12	7573	24/30	133/24	1.005	0.03	N

MZA magnetic zone axis, K_m mean susceptibility, K_max maximum susceptibility, K_min minimum susceptibility, D and I declination and inclination of the axes, respectively, P′ and T corrected anisotropy degree and shape parameter of Jelinek (1981), Int, N and Inv intermediate, normal and inverse magnetic fabric, respectively