Le gisement à étain–cuivre–indium de Charrier (Allier) : un skarnoïde viséen (340 Ma) traceur de la métallogenèse varisque du nord Massif central

Open Access

Tableau 3

Composition de l’apatite (analyses microsonde CAMECA SX Five, ISTO Orléans sauf U et Pb analyses ICP/MS OSUR Rennes). < ld : sous la limite de détection

Composition of apatite (microprobe analyzes CAMECA SX Five, ISTO Orléans except U and Pb ICP/MS analyzes OSUR Rennes). < ld: below detection limit.

	P₂O₅	CaO	SiO₂	F	La₂O₃	Ce₂O₃	Nd₂O₃	Sm₂O₃	O = F	Total	U (ppm)	Th (ppm)
Cristal 1	43,18	56,25	0,11	4,52	< ld	< ld	< ld	< ld	1,90	102,18
	41,61	54,83	0,34	4,16	< ld	< ld	< ld	< ld	1,75	99,35
	41,86	55,62	0,35	4,60	< ld	< ld	< ld	< ld	1,94	100,58
Moyenne	42,22	55,57	0,27	4,43	< ld	< ld	< ld	< ld	1,86	100,70	154,0	18,4
Cristal 2	43,13	55,85	< ld	3,60	< ld	< ld	0,06	< ld	1,52	101,34
	43,40	55,65	0,07	3,58	< ld	< ld	0,04	< ld	1,51	101,31
	43,13	55,97	< ld	3,60	< ld	< ld	0,11	< ld	1,52	101,35
	43,7	55,83	0,02	3,50	< ld	< ld	0,03	< ld	1,47	101,66
	43,41	55,88	< ld	3,53	< ld	< ld	0,04	< ld	1,49	101,46
	41,77	54,22	0,77	3,23	< ld	< ld	< ld	< ld	1,36	98,83
Moyenne	43,05	55,57	0,29	3,51	< ld	< ld	0,06	< ld	1,48	100,99	6,0	33,1
Limite de détection	0,04	0,05	0,02	0,11	0,08	0,09	0,03	0,32

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