Continuity in geochemistry and time of the Tertiary Bergell intrusion (Central Alps)

Gianola, Omar; Schmidt, Max W.; von Quadt, Albrecht; Peytcheva, Irena; Luraschi, Pietro; Reusser, Eric

doi:10.1007/s00015-014-0174-8

Swiss Journal of Geosciences

Table 1 Selected bulk rock compositions

From: Continuity in geochemistry and time of the Tertiary Bergell intrusion (Central Alps)

	Tonalite TZ		K-fsp rich tonalite TZ		Equigranular granodiorite TZ		Hbl rich granodiorite TZ		Granodiorite TZ
	VRU 9	VRU 33	VRU 28	VRU 30	VRU 8	VRU 26	VRU 1A	VRU 31	VRU 29	VRU 40
Longitude	761′525	764′012	762′112	762′108	761′476	762′134	762′290	764′017	762′112	762′137
Latitude	120′918	120′751	121′181	121′165	121′011	121′303	121′424	120′634	121′181	121′425
SiO₂	61.95	64.47	64.03	64.01	67.29	66.40	58.05	63.69	59.10	64.29
TiO₂	0.63	0.55	0.56	0.54	0.42	0.48	0.67	0.57	0.59	0.54
Al₂O₃	16.39	15.79	16.60	16.19	15.80	16.17	18.04	16.62	19.09	17.36
Fe₂O₃	5.48	4.79	4.81	4.53	3.65	4.03	5.82	4.44	4.38	4.03
MnO	0.10	0.10	0.08	0.10	0.06	0.08	0.12	0.09	0.08	0.06
MgO	2.77	2.41	2.36	2.37	1.83	2.09	3.00	2.21	2.16	1.93
CaO	5.44	4.68	4.57	4.61	3.60	3.89	5.28	4.31	3.95	3.81
Na₂O	3.39	3.11	3.84	3.30	3.69	3.86	3.72	3.20	3.67	3.95
K₂O	2.46	3.37	2.08	2.66	2.25	2.16	4.05	4.13	5.60	3.47
P₂O₅	0.22	0.18	0.24	0.21	0.18	0.19	0.47	0.25	0.57	0.27
LOI	0.79	0.62	0.62	0.74	0.55	0.57	0.70	0.65	0.75	0.56
Total	99.63	100.10	99.79	99.26	99.32	99.95	99.93	100.16	99.98	100.28
Sc	17.47	15.05	16.19	13.07	12.94	11.76	20.33	10.17	8.33	3.32
V	119.59	112.24	109.98	116.43	71.03	100.34	120.49	109.78	93.16	77.95
Cr	18.78	18.91	19.91	25.20	19.14	23.64	30.85	21.28	22.91	33.02
Co	12.15	10.78	10.73	12.20	8.43	9.76	13.25	10.60	9.44	7.76
Ni	5.85	6.45	7.61	12.07	9.77	11.86	11.09	8.54	12.89	11.15
Zn	31.48	35.50	40.49	40.55	30.41	30.78	41.68	36.41	50.33	37.97
Ga	14.29	14.34	16.61	15.73	16.00	15.56	18.78	15.90	20.19	17.45
Rb	102.69	118.70	105.74	106.68	99.72	136.37	158.68	159.69	200.60	152.09
Sr	437.84	309.08	355.57	303.30	270.18	256.27	487.16	304.77	394.48	274.86
Y	21.49	21.90	15.92	21.15	15.36	16.81	37.45	17.45	17.91	10.21
Zr	173.59	138.30	180.15	132.04	140.56	148.33	286.74	164.39	232.47	198.21
Nb	11.69	12.34	14.91	11.46	8.99	15.40	18.80	10.68	13.76	14.69
Cs	2.51	2.84	3.08	2.64	2.23	7.51	3.92	3.38	4.39	4.01
Ba	682.80	891.01	360.61	1106.78	435.86	482.75	1744.91	1126.95	2273.85	692.74
La	29.92	13.57	27.69	24.08	30.79	20.72	52.76	30.71	26.11	40.35
Ce	51.40	27.55	51.96	48.67	54.25	42.44	101.51	60.91	54.02	72.46
Pr	5.93	3.55	5.68	5.45	6.19	4.61	11.96	6.35	5.86	7.91
Nd	23.75	15.76	21.47	20.97	23.63	19.55	47.71	23.16	22.05	27.18
Sm	4.21	4.41	4.96	4.86	4.47	4.68	9.58	4.38	5.31	4.11
Eu	1.15	1.01	0.77	1.20	0.73	0.71	1.47	1.07	1.28	0.95
Gd	4.31	4.25	4.08	4.44	4.02	3.33	8.57	3.72	4.39	2.91
Tb	0.64	0.73	0.55	0.72	0.50	0.48	1.12	0.57	0.73	0.34
Dy	3.69	5.01	3.22	5.08	2.93	2.92	6.58	3.99	4.72	1.91
Ho	0.67	0.78	0.52	0.81	0.56	0.50	1.28	0.70	0.71	0.34
Er	2.29	2.18	1.61	2.43	1.55	1.77	3.34	1.85	1.85	0.98
Tm	0.28	0.35	0.21	0.38	0.18	0.23	0.50	0.25	0.28	0.14
Yb	1.89	2.35	1.31	1.68	1.22	1.47	3.23	1.72	1.67	1.01
Lu	0.32	0.36	0.22	0.37	0.14	0.22	0.51	0.32	0.22	0.14
Hf	4.51	4.31	5.32	5.16	3.91	4.86	7.19	5.98	8.30	5.96
Ta	0.96	1.99	1.03	1.05	0.65	1.98	2.38	1.26	1.21	1.40
Pb	13.29	24.30	16.42	21.77	14.33	14.22	21.07	31.99	36.27	21.17
Th	17.07	9.91	13.32	12.91	13.84	20.94	25.29	26.52	12.18	18.44
U	2.49	3.57	2.64	2.35	1.84	9.90	5.35	4.60	3.70	6.67

	Mafic enclave	Aplite	Qz-diorite		Granodiorite main unit	Tonalite Como molasse		Granodiorite Como molasse
	VRU 1B	VRU 11	VRT 1	VRT 2	VRG 1	CMB-4	CMB-9	CMB-5	CMB-15
Longitude	762′290	761′891	763′348	763′382	762′099	723′092	721′448	721′396	723′275
Latitude	121′424	120′757	120′642	120′691	122′591	76′280	76′466	76′560	76′035
SiO₂	49.13	74.84	47.90	53.19	69.06	59.32	62.61	65.02	66.04
TiO₂	1.17	0.01	1.27	0.91	0.36	0.70	0.58	0.18	0.44
Al₂O₃	18.00	14.36	19.44	18.43	15.54	17.34	16.01	17.01	15.99
Fe₂O₃	9.35	0.70	10.32	8.07	2.87	6.50	5.10	2.09	3.52
MnO	0.22	0.18	0.16	0.14	0.05	0.11	0.09	0.04	0.06
MgO	5.48	0.03	5.28	4.30	1.12	3.45	2.64	1.09	1.91
CaO	8.06	0.53	9.51	8.01	2.75	6.41	4.72	2.18	3.50
Na₂O	3.96	4.51	2.99	3.16	3.60	3.21	2.84	2.58	3.59
K₂O	2.62	3.88	1.95	1.92	4.01	2.15	3.88	8.36	3.67
P₂O₅	1.05	0.10	0.37	0.33	0.21	0.16	0.18	0.13	0.26
LOI	0.94	0.44	0.80	0.85	0.51	0.98	1.03	0.85	0.93
Total	100.00	99.57	100.00	99.31	100.08	100.33	99.69	99.53	99.90
Sc	31.84	–	33	23	5	19	16	14	8
V	218.88	3	287	219	40	167	123	40	70
Cr	61.58	1	21	30	10	18	50	57	35
Co	21.41	–	28	26	6	29	23	16	18
Ni	22.53	4	9	14	13	11	8	18	20
Zn	70.45	27	91	75	51	61	54	29	48
Ga	19.84	19	24	20	20	24	23	20	25
Rb	155.86	255	74	79	160	96	157	209	158
Sr	405.71	15	480	496	401	261	301	484	405
Y	53.01	10	51	38	20	26	21	15	16
Zr	342.77	31	201	208	236	167	154	96	192
Nb	27.79	13	11	10	8	8	8	5	11
Cs	4.83	–	–	–	–	–	–	–	–
Ba	498.34	10	725	849	774	419	1143	3200	916
La	30.30	8	17	8	34	4	–	27	30
Ce	85.39	–	72	65	76	48	45	67	66
Pr	12.44	–	–	–	–	–	–	–	–
Nd	56.12	3	29	26	30	24	23	30	30
Sm	12.61	–	–	–	–	–	–	–	–
Eu	2.70	–	–	–	–	–	–	–	–
Gd	11.30	–	–	–	–	–	–	–	–
Tb	1.54	–	–	–	–	–	–	–	–
Dy	9.21	–	–	–	–	–	–	–	–
Ho	1.66	–	–	–	–	–	–	–	–
Er	4.99	–	–	–	–	–	–	–	–
Tm	0.69	-	-	-	-	-	–	–	–
Yb	4.98	-	-	-	-	-	–	–	–
Lu	0.62	-	-	-	-	-	–	–	–
Hf	8.61	2	5	5	5	9	8	8	12
Ta	1.80	–	–	–	–	–	–	–	–
Pb	13.15	–	–	–	–	17	38	52	33
Th	14.64	1	4	3	18	3	10	12	17
U	7.36	11	13	11	13	1	3	3	3

Major elements are given in wt%, trace elements in ppm
TZ transition zone

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