Table T12. Representative analyses of amphibole phenocrysts and phenoclasts.

Table T12. Representative analyses of amphibole phenocrysts and phenoclasts.

Rift basin
Footwall

Northern margin

Sample:
180-1108B-3R-1,
41-44.5 cm
180-1108B-41R-1, 75-78 cm
180-1108B-47R-1,
33-37.5 cm
180-1116A-6R-1, 37-39 cm

180-1118A-68R-3, 24-28 cm

Analysis number:

1

2

3

4

5

7

1

1

2

1

1

Occurrence:

Hbl + Plg

Hbl + Opx

Hbl in qtz-vein

Hbl + Bt intergrowth

Red Hbl core

Hbl phenoclast

Red Hbl

Hbl

Hbl alt chl

Hbl + Bt

Hbl + Bt

Major element oxide (wt%):

SiO₂ 48.36 46.49 51.42 44.55 43.12 51.88 42.35 43.27 46.46 43.94 49.57

TiO₂ 1.27 0.95 0.56 2.51 3.68 0.56 3.56 2.39 0.96 1.97 0.9

Cr₂O₃ 0.51 0.17 0.26 0.36 0.42 0.3 0.27 0.38 0.24 0.32 0.38

Al₂O₃ 7.22 7.54 4.54 10.94 11.21 4.36 10.06 10.31 4.24 10.35 6.29

Fe₂O₃ 4.37 4.54 9.02 0 0.53 7.4 4.23 4.16 9.09 5.52 2.52

FeO 5.98 11.54 2.01 9.6 10.94 2.92 8.17 6.66 15.49 7.75 9.21

MnO 0.33 0.39 0.4 0.29 0.3 0.19 0.22 0.18 0.37 0.31 0.49

MgO 16.46 12.62 17.98 15.02 13.5 17.97 13.85 14.94 9.04 14.38 15.4

NiO 0.17 0 0.13 0.14 0.15 0.11 0.11 0.08 0.06 0.05 0.11

CaO 11.85 12.15 11.99 11.73 12.14 11.88 11.37 11.92 10.04 11.46 11.93

Na₂O 1.87 1.29 0.52 3.67 2.22 0.66 2.33 2.33 1.73 2.83 1.8

K₂O 0.68 0.52 0.4 0.95 1.27 0.28 0.97 0.54 0.82 1.05 0.68

H₂O 2.11 2.04 2.15 2.08 2.06 2.14 2.03 2.05 1.98 2.08 2.1

Total: 101.18 100.23 101.37 101.84 101.55 100.64 99.51 99.2 100.52 102 101.38

Cation (atoms/formula unit):

Si 6.873 6.834 7.179 6.407 6.624 7.274 6.254 6.341 7.023 6.330 7.080

Ti 0.136 0.105 0.059 0.272 0.402 0.059 0.395 0.263 0.109 0.213 0.097

Cr 0.057 0.020 0.029 0.041 0.048 0.033 0.032 0.044 0.029 0.036 0.043

Al 1.209 1.306 0.747 1.854 1.919 0.721 1.751 1.780 0.755 1.757 1.058

Fe³⁺ 0.467 0.502 0.948 0.000 0.058 0.780 0.470 0.459 1.034 0.598 0.271

Fe²⁺ 0.711 1.418 0.234 1.154 1.329 0.342 1.008 0.816 1.958 0.933 1.099

Mn 0.040 0.049 0.047 0.035 0.037 0.023 0.028 0.022 0.047 0.038 0.059

Mg 3.487 2.765 3.742 3.219 2.923 3.755 3.048 3.263 2.036 3.087 3.278

Ni 0.019 0.000 0.015 0.016 0.018 0.012 0.013 0.009 0.007 0.006 0.013

Ca 1.804 1.913 1.793 1.807 1.889 1.784 1.799 1.871 2.626 1.768 1.825

Na 0.515 0.368 0.141 1.023 0.625 0.179 0.667 0.662 0.507 0.791 0.499

K 0.123 0.098 0.071 0.174 0.235 0.050 0.183 0.101 0.158 0.193 0.124

OH^- 2.000 2.000 2.000 2.000 2.000 2.000 2.000 2.000 2.000 2.000 2.000

	Rift basin	Footwall	Northern margin
Sample:	180-1108B-3R-1, 41-44.5 cm	180-1108B-41R-1, 75-78 cm	180-1108B-47R-1, 33-37.5 cm	180-1116A-6R-1, 37-39 cm	180-1118A-68R-3, 24-28 cm
Analysis number:	1	2	3	4	5	7	1	1	2	1	1
Occurrence:	Hbl + Plg	Hbl + Opx	Hbl in qtz-vein	Hbl + Bt intergrowth	Red Hbl core	Hbl phenoclast	Red Hbl	Hbl	Hbl alt chl	Hbl + Bt	Hbl + Bt
Major element oxide (wt%):
SiO₂	48.36	46.49	51.42	44.55	43.12	51.88	42.35	43.27	46.46	43.94	49.57
TiO₂	1.27	0.95	0.56	2.51	3.68	0.56	3.56	2.39	0.96	1.97	0.9
Cr₂O₃	0.51	0.17	0.26	0.36	0.42	0.3	0.27	0.38	0.24	0.32	0.38
Al₂O₃	7.22	7.54	4.54	10.94	11.21	4.36	10.06	10.31	4.24	10.35	6.29
Fe₂O₃	4.37	4.54	9.02	0	0.53	7.4	4.23	4.16	9.09	5.52	2.52
FeO	5.98	11.54	2.01	9.6	10.94	2.92	8.17	6.66	15.49	7.75	9.21
MnO	0.33	0.39	0.4	0.29	0.3	0.19	0.22	0.18	0.37	0.31	0.49
MgO	16.46	12.62	17.98	15.02	13.5	17.97	13.85	14.94	9.04	14.38	15.4
NiO	0.17	0	0.13	0.14	0.15	0.11	0.11	0.08	0.06	0.05	0.11
CaO	11.85	12.15	11.99	11.73	12.14	11.88	11.37	11.92	10.04	11.46	11.93
Na₂O	1.87	1.29	0.52	3.67	2.22	0.66	2.33	2.33	1.73	2.83	1.8
K₂O	0.68	0.52	0.4	0.95	1.27	0.28	0.97	0.54	0.82	1.05	0.68
H₂O	2.11	2.04	2.15	2.08	2.06	2.14	2.03	2.05	1.98	2.08	2.1
Total:	101.18	100.23	101.37	101.84	101.55	100.64	99.51	99.2	100.52	102	101.38
Cation (atoms/formula unit):
Si	6.873	6.834	7.179	6.407	6.624	7.274	6.254	6.341	7.023	6.330	7.080
Ti	0.136	0.105	0.059	0.272	0.402	0.059	0.395	0.263	0.109	0.213	0.097
Cr	0.057	0.020	0.029	0.041	0.048	0.033	0.032	0.044	0.029	0.036	0.043
Al	1.209	1.306	0.747	1.854	1.919	0.721	1.751	1.780	0.755	1.757	1.058
Fe³⁺	0.467	0.502	0.948	0.000	0.058	0.780	0.470	0.459	1.034	0.598	0.271
Fe²⁺	0.711	1.418	0.234	1.154	1.329	0.342	1.008	0.816	1.958	0.933	1.099
Mn	0.040	0.049	0.047	0.035	0.037	0.023	0.028	0.022	0.047	0.038	0.059
Mg	3.487	2.765	3.742	3.219	2.923	3.755	3.048	3.263	2.036	3.087	3.278
Ni	0.019	0.000	0.015	0.016	0.018	0.012	0.013	0.009	0.007	0.006	0.013
Ca	1.804	1.913	1.793	1.807	1.889	1.784	1.799	1.871	2.626	1.768	1.825
Na	0.515	0.368	0.141	1.023	0.625	0.179	0.667	0.662	0.507	0.791	0.499
K	0.123	0.098	0.071	0.174	0.235	0.050	0.183	0.101	0.158	0.193	0.124
OH^-	2.000	2.000	2.000	2.000	2.000	2.000	2.000	2.000	2.000	2.000	2.000

Note: Bt = biotite, Chl = chlorite, Hbl = hornblende, Plg = plagioclase, Opx = orthopyroxene.