Development of the Arabian-Nubian Shield along the Marsa Alam-Idfu transect, Central-Eastern Desert, Egypt: geochemical implementation of zircon U-Pb geochronology

Table 4 LA-ICP-MS U-th-pb Zircon Data for the studied samples

Sample Code	Gr.	Concentrations		Age (Ma) and 2σ errors								%discordance	Sample
Sample Code	Gr.	²⁰⁴Pb	²³⁸U	²⁰⁶Pb/ ²³⁸U	± 2σ	²⁰⁷Pb/ ²³⁵U	± 2σ	²⁰⁷Pb/ ²⁰⁶Pb	± 2σ	Conc.	± 2σ	%discordance	Conc. (Ma)	± 2σ
Island-arc
MI10	A3	0.001	102	1207	12	1146	10	1032	10	1145	10	-5.3	729	3
	E5	0.009	173	1133	15	1145	14	1168	12	1146	13	1.1
	E8	-0.003	181	1154	16	1159	14	1167	12	1159	14	0.4
Syn-orogenic
MI02	E2	0.003	337	1514	56	1545	53	1588	37	1549	4	2.0	699	4
	E8	-0.005	65	704	11	723	10	781	12	723	10	2.6
MI11	C2	0.008	196	1042	29	1093	27	1194	24	1095	25	4.7	680	5
MI07	E3	-0.045	78	763	7	749	6	708	7	749	6	-1.8	646	2
Post-orogenic / Dokhan eruptions
MI04	D3	0.002	101	579	6	594	5	648	7	594	5	2.4	623	2
Post-orogenic / Magmatic emplacements
MI08	B4	0.006	165	740	10	762	9	772	13	762	9	2.9	582	3
	C7	0.000	128	606	7	621	6	629	14	621	6	2.4
	B6	-0.001	102	555	6	549	5	556	15	549	5	-1.1

ISSN: 1467-4866