Early Permian age of granite pebbles from an Eocene or Oligocene conglomerate of the Internal Rif belt (Alboran domain, Morocco): hypothesis on their origin

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Table 2

LA-ICPMS U-Pb zircon dating results.

							2 σ error		2 σ error	Rho	Age (Ma)	2 σ error

sample	zircon#	Pb ppm^a	Th ppm^a	U ppm^a	Th/U	²⁰⁷Pb/²³⁵U^b	²⁰⁷Pb/²³⁵U	²⁰⁶Pb/²³⁸U^b	²⁰⁶Pb/²³⁸U		²⁰⁶Pb/²³⁸U	²⁰⁶Pb/²³⁸U
C24F	C1/Zr1	103	222	2351	0.09	0.4131	0.0151	0.04457	0.00153	0.94	281.1	9.5
C24F	C1/Zr2	159	2656	2946	0.90	0.3955	0.0152	0.04462	0.00156	0.91	281.4	9.5
C24F	C4/Zr1	144	454	3408	0.13	0.4060	0.0165	0.04283	0.00150	0.86	270.3	9.2
C24F	C5/Zr1.1	32	76	746	0.10	0.3618	0.0148	0.04505	0.00156	0.85	284.1	9.7
C24F	C5/Zr1.2	29	74	669	0.11	0.3531	0.0137	0.04481	0.00156	0.90	282.6	9.6
C24F	C5/Zr1.3	36	149	826	0.18	0.3573	0.0140	0.04504	0.00156	0.89	284.0	9.6
C24F	C5/Zr1.4	33	131	758	0.17	0.3420	0.0134	0.04499	0.00156	0.89	283.7	9.6
C24F	C5/Zr2	155	295	3524	0.08	0.4418	0.0163	0.04499	0.00156	0.94	283.7	9.6
C24F	C9/Zr1.1	153	253	3547	0.07	0.4017	0.0158	0.04428	0.00153	0.88	279.3	9.5
C24F	C9/Zr1.2	55	79	1192	0.07	0.4901	0.0206	0.04525	0.00159	0.84	285.3	9.8
C24F	C10/Zr1	92	847	2002	0.42	0.3254	0.0128	0.04498	0.00156	0.89	283.6	9.6
C24F	C10/Zr2	71	340	1621	0.21	0.3243	0.0127	0.04512	0.00156	0.88	284.5	9.7
C24F	C10/Zr3	202	1309	4430	0.30	0.4030	0.0154	0.04472	0.00156	0.91	282.0	9.6
C24F	C13/Zr1	50	331	1059	0.31	0.4074	0.0254	0.04441	0.00165	0.60	280.1	10.1
CF Rif	C5/Zr1	59	44	1336	0.03	0.4285	0.0174	0.04563	0.00171	0.92	287.6	10.5
CF Rif	C8/Zr1	92	307	2177	0.14	0.3185	0.0121	0.04406	0.00162	0.97	278.0	10.1
CF Rif	C9/Zr1.1	42	153	1004	0.15	0.3767	0.0148	0.04331	0.00162	0.95	273.3	9.9
CF Rif	C9/Zr1.2	79	170	1832	0.09	0.3528	0.0141	0.04527	0.00168	0.93	285.4	10.4
CF Rif	C11/Zr1	38	126	877	0.14	0.3317	0.0133	0.04502	0.00168	0.93	283.9	10.3
CF Rif	C12/Zr1	73	105	1771	0.06	0.3390	0.0149	0.04344	0.00162	0.85	274.1	10.0
CG Rif	C2/Zr1	74	416	1674	0.25	0.3613	0.0144	0.04413	0.00162	0.92	278.4	10.1
CG Rif	C3/Zr1	20	107	443	0.24	0.3673	0.0180	0.04571	0.00171	0.76	288.2	10.6
CG Rif	C5/Zr1	113	539	2609	0.21	0.3885	0.0147	0.04390	0.00162	0.97	277.0	9.9
CG Rif	C7/Zr1	86	625	1967	0.32	0.3234	0.0125	0.04317	0.00159	0.95	272.5	9.8
CG Rif	C8/Zr1	77	285	1713	0.17	0.4054	0.0159	0.04513	0.00165	0.93	284.5	10.2
CG Rif	C10/Zr1	26	201	568	0.35	0.3432	0.0142	0.04488	0.00165	0.89	283.0	10.1
CG Rif	C10/Zr2	22	304	427	0.71	0.3801	0.0167	0.04529	0.00168	0.85	285.6	10.3
CG Rif	C13/Zr2	76	210	1850	0.11	0.3658	0.0144	0.04342	0.00156	0.91	274.0	9.7

Decay constants of Jaffrey et al. (1971) used.

: concentration uncertainty c.20%.

: data not corrected for common-Pb.

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