Origin of high Zn contents in Jurassic limestone of the Jura mountain range and the Burgundy: evidence from Zn speciation and distribution

Swiss Journal of Geosciences

Table 1 Geological characteristics for selected limestone samples, total content of Zn, Cd, S, Fe, Si and Ca determined by bulk XRF-spectrometry (X_tot), and acid-extractable contents of Zn and Cd (X_ICP)

Sample^a	Age^b	Origin^c	Facies	Zn_tot (mg/kg)	Zn_ICP (mg/kg)	Cd_tot (mg/kg)	Cd_ICP (mg/kg)	S_tot (mg/kg)	Fe_tot (mg/kg)	Si_tot (mg/kg)	Ca_tot (mg/kg)
S32	La. Bajocian	Jura BL	Oosparite	92	95	bdl^d	0.6	212	9,286	38,160	344,500
S105	La. Bajocian	Jura BL	Oosparite	25	ND	bdl^d	1.5	47	1,448	1,713	391,200
S116	La. Bajocian	Jura BL	Oosparite	16	15	bdl^d	1.4	72	1,067	1,709	408,800
S127	La. Bajocian	Jura BL	Oosparite	21	15	bdl^d	1.3	34	1,242	1,518	405,700
S151	La. Bajocian	Jura BL	Oomicrite/sparite	92	324	bdl^d	2.0	220	10,660	46,580	299,600
S153	La. Bajocian	Jura BL	Oomicrite/sparite	117	89	bdl^d	1.0	266	4,465	14,060	373,400
S156	La. Bajocian	Jura BL	Oomicrite	480	381	5	4.2	247	2,977	9,812	390,700
La24BP3	Ea. Bajocian	Jura BL	Oomicrite	829	1,144	8	8.5	1,135	9,256	6,077	390,400
La24BP4	Ea. Bajocian	Jura BL	Oomicrite	606	690	7	5.5	1,149	7,007	12,050	387,000
Da4a	Ea. Bajocian	Burgundy	Biomicrite	145	105	bdl^d	1.2	86	8,958	18,030	364,000
LU2	Ea. Bajocian	Burgundy	Biomicrite	344	240	5	2.7	268	8,135	9,602	382,600
LU1	Ea. Bajocian	Burgundy	Biomicrite	270	178	bdl^d	bdl^d	508	11,690	12,280	368,800
GUR	La. Bajocian	Jura NE	Oomicrite	43	ND	bdl^d	ND	254	1,992	2,421	389,500
DOR	La. Oxfordian	Jura BL	Pelmicrite	207	ND	17	ND	6	413	748	386,600
Pi23	La. Oxfordian	Jura JU	Lagoonal micrite	40	38	bdl^d	0.5	345	1,267	3,258	397,400
Pi17	La. Oxfordian	Jura JU	Lagoonal micrite	12	bdl^d	bdl^d	1.1	110	596	1,462	407,500

ND not determined
^a S Schleifenberg, La Lausen, Da Davayé, LU Lucy-le-Bois, GUR Gurnigel, DOR Dornach, Pi Pichoux, see Fig. 2 for stratigraphical position of the samples
^b La Late, Ea Early
^c BL Canton Baselland, NE Canton Neuchâtel, JU Canton Jura
^d bdl value below detection limit of 10 mg/kg for Zn_ICP, 5 mg/kg for Cd_tot, and 0.1 mg/kg for Cd_ICP