Ion microprobe dating of fissure monazite in the Western Alps: insights from the Argentera Massif and the Piemontais and Briançonnais Zones

Ricchi, Emmanuelle; Gnos, Edwin; Rubatto, Daniela; Whitehouse, Martin John; Pettke, Thomas

doi:10.1186/s00015-020-00365-3

Swiss Journal of Geosciences

Table 5 LA-ICP-MS analyses of element concentrations in monazite domains (μg/g). Note that Yb and Lu correspond to maximum concentrations because of potential GdO and TbO interferences during measurement

From: Ion microprobe dating of fissure monazite in the Western Alps: insights from the Argentera Massif and the Piemontais and Briançonnais Zones

Sample domain / Element (isotope)	VIU1—A	VIU1—B	VIU1—B	BALZI2—C	BALZI2—C	BALZI2—B	MORI1—B	MORI1—B	MORI1–A	MORI1—A
spot #	7,8,9	10,11,12	13,14,15,16	68,69,70	71,72,73	74,75,76,77	36,37,38,39	40,41,42	43,44,45,46	47,48,49
B11	< 0.24	< 1	< 0.34	< 0.57	< 0.4	< 0.52	0.4 ± 0.1	1 ± 0.1	< 0.23	< 0.36
Na23	< 0.16	< 0.7	< 0.19	< 0.22	6 ± 4	< 0.25	0.8 ± 0.9	5 ± 3	0.7 ± 0.3	< 0.18
Si29	< 149	< 1290	< 341	< 580	< 380	< 390	< 233	< 207	< 214	< 350
P31	109,100 ± 1700	103,900 ± 800	106,500 ± 200	107,700 ± 1800	107,500 ± 200	106,000 ± 800	111,600 ± 1800	111,900 ± 1200	111,200 ± 2200	108,400 ± 700
Ca43	4060 ± 390	3460 ± 230	3090 ± 610	4020 ± 550	1360 ± 110	890 ± 460	3780 ± 170	4230 ± 100	4050 ± 160	2920 ± 130
Ti49	< 0.47	< 3	0.7 ± 0.1	< 0.37	< 0.91	< 1	< 0.41	< 0.31	< 0.40	< 0.64
As75	296 ± 11	252 ± 4	296 ± 13	363 ± 29	367 ± 2	376 ± 27	349 ± 3	347 ± 6	333 ± 7	313 ± 1
Sr88	630 ± 58	677 ± 39	485 ± 136	1540 ± 170	473 ± 12	382 ± 206	871 ± 32	949 ± 22	730 ± 55	503 ± 13
Y89	4150 ± 430	3090 ± 70	5000 ± 500	7800 ± 2100	7700 ± 400	3500 ± 260	11,020 ± 170	9630 ± 430	9040 ± 350	6600 ± 200
Mo95	0.8 ± 0.03	< 0.42	0.8 ± 0.2	0.7 ± 0.1	0.7 ± 0.1	0.9 ± 0.3	1 ± 0.2	0.9 ± 0.1	0.9 ± 0.2	0.9 ± 0.2
Ba137	0.3 ± 0.1	< 1	0.4 ± 0.1	0.4 ± 0.1	0.7 ± 0.5	0.3 ± 0.1	0.5 ± 0.1	1 ± 0.2	0.4 ± 0.1	0.6 ± 0.1
La139	114,500 ± 5700	139,600 ± 900	121,200 ± 7800	154,300 ± 18,400	141,500 ± 2000	144,800 ± 2600	119,750 ± 640	120,700 ± 1100	125,200 ± 3800	137,200 ± 300
Ce140	298,400 ± 2200	319,260 ± 540	301,200 ± 4000	289,900 ± 7400	294,800 ± 1600	307,100 ± 1400	272,400 ± 1700	275,100 ± 2400	287,500 ± 3800	292,700 ± 700
Pr141	29,150 ± 610	28,170 ± 110	29,310 ± 490	31,000 ± 1200	32,500 ± 80	33,110 ± 190	32,910 ± 220	33,000 ± 180	33,290 ± 130	33,010 ± 250
Nd146	119,300 ± 4100	105,320 ± 640	119,900 ± 5500	115,300 ± 10,800	123,300 ± 1200	121,900 ± 1800	133,000 ± 1200	132,740 ± 270	126,600 ± 2100	122,530 ± 860
Sm147	22,600 ± 810	18,300 ± 160	23,600 ± 2000	18,900 ± 3600	19,470 ± 657	17,140 ± 340	27,920 ± 170	27,460 ± 490	23,190 ± 830	21,770 ± 170
Eu151	4400 ± 100	3430 ± 12	4780 ± 410	2270 ± 470	2500 ± 60	1630 ± 120	2230 ± 20	2090 ± 60	1720 ± 50	1544 ± 8
Gd157	15,780 ± 310	11,310 ± 30	17,130 ± 1650	10,910 ± 2270	11,980 ± 400	9720 ± 590	19,430 ± 250	18,830 ± 570	14,420 ± 710	14,020 ± 50
Tb159	1300 ± 10	887 ± 8	1510 ± 190	1040 ± 240	1120 ± 50	783 ± 55	1720 ± 30	1650 ± 50	1310 ± 80	1190 ± 9
Dy163	3560 ± 240	2300 ± 30	4120 ± 510	3890 ± 990	4020 ± 180	2350 ± 210	5450 ± 60	5280 ± 170	4430 ± 220	3550 ± 60
Ho165	234 ± 22	154 ± 3	282 ± 32	394 ± 111	395 ± 19	194 ± 21	494 ± 12	445 ± 22	394 ± 18	301 ± 7
Er167	189 ± 22	134 ± 6	245 ± 23	567 ± 159	531 ± 26	219 ± 26	559 ± 11	475 ± 25	484 ± 17	346 ± 16
Tm169	7 ± 1	5 ± 0.2	10 ± 1	37 ± 9	31 ± 2	11 ± 1	28 ± 1	23 ± 1	28 ± 1	19 ± 1
Yb173	15 ± 2	10.6 ± 0.1	22 ± 2	119 ± 26	90 ± 5	29 ± 4	66 ± 2	53 ± 3	74 ± 3	49 ± 4
Lu175	0.7 ± 0.1	0.54 ± 0.05	1.1 ± 0.1	7 ± 1	5.2 ± 0.2	1.5 ± 0.2	3.1 ± 0.1	2.5 ± 0.2	4 ± 0.2	2.7 ± 0.2
W182	0.14 ± 0.01	0.19 ± 0.04	0.14 ± 0.03	0.2 ± 0.1	0.2 ± 0.1	0.16 ± 0.02	0.17 ± 0.04	0.18 ± 0.03	0.16 ± 0.05	0.15 ± 0.03
Th232	23,700 ± 2700	15,400 ± 1500	15,000 ± 2200	2980 ± 1350	3210 ± 490	3670 ± 1040	5420 ± 1070	3570 ± 390	4830 ± 790	4430 ± 240
U238	349 ± 97	259 ± 3	234 ± 12	85 ± 55	93 ± 9	48 ± 18	121 ± 5	116 ± 5	24 ± 1	29 ± 1

Sample domain / Element (isotope)	VINA1—C2	VINA1—B	VINA1—A	VINA1 – A	VINA1—A	GESS1—B	GESS1—B	GESS1—B	GESS1 – B	GESS1—B
spot #	17,18,19,20	21,22,23,24	25,26,27,28	29,30,31,32	33,34,35	50,51,52,53	54,55,56	57,58,59	60,61,62	63,64,65,66
B11	< 0.34	< 0.16	< 0.36	< 0.54	< 0.51	< 0.68	< 0.75	< 0.53	< 0.43	< 0.67
Na23	< 0.23	< 0.12	< 0.19	< 0.34	< 0.48	< 0.51	6 ± 7	4 ± 2	< 0.19	< 0.38
Si29	< 380	< 203	< 390	< 670	1500 ± 250	< 810	< 840	< 780	< 380	< 760
P31	106,600 ± 1000	109,000 ± 900	106,000 ± 1000	106,300 ± 800	101,900 ± 1800	105,900 ± 1100	107,000 ± 400	106,000 ± 80	107,900 ± 500	107,300 ± 500
Ca43	1140 ± 120	2420 ± 160	3850 ± 120	4840 ± 1010	4700 ± 1100	1860 ± 290	2880 ± 710	2500 ± 60	1720 ± 320	1380 ± 320
Ti49	0.5 ± 0.1	0.4 ± 0.1	0.5 ± 0.1	< 1	< 1	< 0.65	< 2	< 1	< 0.55	< 1
As75	321 ± 8	314 ± 2	303 ± 4	285 ± 17	325 ± 15	363 ± 5	357 ± 8	329 ± 5	328 ± 5	332 ± 5
Sr88	284 ± 18	543 ± 31	861 ± 56	1040 ± 370	1140 ± 220	460 ± 143	655 ± 31	559 ± 13	339 ± 43	332 ± 133
Y89	5400 ± 400	5870 ± 170	5180 ± 80	5440 ± 950	2610 ± 620	8490 ± 790	8600 ± 590	5870 ± 440	6350 ± 140	6700 ± 170
Mo95	0.8 ± 0.1	0.8 ± 0.1	0.8 ± 0.2	0.8 ± 0.2	1.1 ± 0.2	1 ± 0.2	0.9 ± 0.3	1.1 ± 0.3	0.9 ± 0.2	1 ± 0.1
Ba137	0.32 ± 0.04	0.48 ± 0.04	1 ± 0.1	1 ± 1	1.4 ± 0.6	< 0.57	0.8 ± 0.3	< 0.36	0.4 ± 0.1	0.44 ± 0.06
La139	140,900 ± 2900	139,800 ± 800	138,780 ± 960	149,100 ± 12,000	129,400 ± 7100	118,500 ± 3100	118,700 ± 1900	130,700 ± 800	135,500 ± 2100	132,300 ± 2600
Ce140	284,000 ± 2000	285,300 ± 400	282,760 ± 630	287,400 ± 3500	274,500 ± 2970	275,200 ± 4600	273,300 ± 2000	286,500 ± 1000	290,200 ± 200	287,500 ± 700
Pr141	33,170 ± 160	32,550 ± 80	32,240 ± 180	31,640 ± 1110	32,750 ± 660	34,450 ± 160	33,930 ± 140	33,480 ± 34	33,300 ± 160	33,580 ± 400
Nd146	129,500 ± 1800	124,400 ± 600	123,000 ± 1200	116,200 ± 6800	129,300 ± 6800	141,500 ± 2100	138,400 ± 1200	129,550 ± 430	127,300 ± 1600	130,190 ± 3050
Sm147	24,640 ± 610	22,580 ± 230	22,190 ± 330	21,610 ± 1010	26,130 ± 2070	32,470 ± 1230	32,100 ± 1100	27,130 ± 330	23,900 ± 660	27,650 ± 530
Eu151	2070 ± 70	1740 ± 20	1570 ± 20	1430 ± 130	1360 ± 20	2430 ± 220	2230 ± 100	1680 ± 50	1760 ± 80	1980 ± 110
Gd157	16,080 ± 580	13,460 ± 220	14,250 ± 330	12,850 ± 1270	14,170 ± 640	22,430 ± 1340	22,170 ± 1030	16,200 ± 380	15,520 ± 540	16,370 ± 240
Tb159	1260 ± 70	1160 ± 20	1150 ± 20	1050 ± 130	898 ± 86	1850 ± 150	1840 ± 100	1280 ± 50	1270 ± 50	1300 ± 10
Dy163	3410 ± 200	3300 ± 80	3240 ± 70	3010 ± 470	1940 ± 340	5250 ± 470	5230 ± 370	3440 ± 170	3640 ± 120	3620 ± 80
Ho165	255 ± 18	266 ± 7	255 ± 4	241 ± 47	122 ± 28	407 ± 36	398 ± 31	253 ± 17	297 ± 10	286 ± 9
Er167	274 ± 22	310 ± 10	276 ± 10	273 ± 63	104 ± 29	410 ± 43	390 ± 32	244 ± 18	326 ± 9	310 ± 12
Tm169	14 ± 1	17 ± 1	14 ± 1	15 ± 4	4 ± 2	18 ± 2	17 ± 2	11 ± 1	17 ± 1	15 ± 1
Yb173	33 ± 3	45 ± 2	36 ± 2	39 ± 12	10 ± 3	38 ± 6	36 ± 5	25 ± 2	40 ± 2	36 ± 2
Lu175	1.6 ± 0.1	2.3 ± 0.1	1.9 ± 0.2	2 ± 1	0.5 ± 0.2	1.7 ± 0.2	1.7 ± 0.2	1.3 ± 0.1	2.1 ± 0.2	1.8 ± 0.2
W182	0.13 ± 0.03	0.15 ± 0.03	0.14 ± 0.02	0.18 ± 0.03	0.13 ± 0.02	< 0.14	0.2 ± 0.1	0.13 ± 0.02	0.15 ± 0.03	0.2 ± 0.02
Th232	3830 ± 210	8040 ± 690	18,200 ± 2100	11,000 ± 2100	37,300 ± 3200	2440 ± 250	5030 ± 770	8070 ± 320	2350 ± 530	1370 ± 500
U238	32 ± 4	33 ± 1	39 ± 2	24 ± 4	57 ± 37	93 ± 7	118 ± 4	40 ± 3	36 ± 2	34 ± 4

The analysed isotopes correspond to the number following each element. Li7, Al27, Mn55, Fe57, In115 and Bi209 were analysed but are below detection. Data entries " < value" represent measurements below LOD

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