. Author manuscript; available in PMC: 2021 Sep 15.

Published in final edited form as: Geochim Cosmochim Acta. 2015 Feb 14;155:122–153. doi: 10.1016/j.gca.2015.02.004

Table 2.

Highly siderophile element concentrations (ng/g), ¹⁸⁷Os/¹⁸⁸Os and ¹⁸⁷Re/¹⁸⁸Os data of Apollo 15 and 16 impact melt rocks

Sample	Wt. (g)	Re_meas	Re*calc^a	Os	Ir	Ru	Pt	Pd	¹⁸⁷Os/¹⁸⁸Os±2σ^b		¹⁸⁷Re/¹⁸⁸Os_meas±2σ^b		¹⁸⁷Re/¹⁸⁸Os_calc

Apollo 15 impact melt breccia 15445,299 (10 subsamples, totaling ~0.90 g)
15445_A1	0.1113	0.740	0.724	6.848	7.55	16.2	19.2	15.7	0.13475	±6	0.521	±6	0.500
15445_B1	0.1049	0.410	0.402	3.698	3.99	8.98	10.6	10.0	0.13586	±6	0.535	±12	0.514
15445_C1	0.0946	0.569	0.567	5.378	5.79	12.1	14.3	12.6	0.13462	±6	0.511	±8	0.498
15445_D1	0.1091	0.472	0.472	4.327	4.69	10.3	12.9	11.3	0.13603	±6	0.526	±10	0.516
15445_F1	0.0896	0.631	0.622	5.758	6.31	14.2	17.5	15.6	0.13559	±7	0.529	±8	0.510
15445_A2	0.0984	0.310	0.312	2.971	2.98	6.35	7.40	6.90	0.13452	±8	0.510	±15	0.497
15445_B2	0.0738	0.345	0.350	3.536	4.00	8.40	9.79	9.27	0.13227	±7	0.470	±17	0.468
15445_B3	0.0679	0.810	0.805	7.549	7.20	15.6	17.9	16.2	0.13509	±8	0.517	±9	0.504
15445_D2	0.0802	0.497	0.477	4.534	4.51	9.93	11.23	9.82	0.13458	±5	0.529	±13	0.498
15445_F2	0.0744	0.813	0.814	7.645	7.88	17.1	19.8	16.9	0.13503	±6	0.513	±8	0.503
Average^c		0.56	0.55	5.14	5.43	11.8	13.9	12.3	0.1348	±7	0.524	±11	0.501

Apollo 15 impact melt breccia 15455,326 (11 subsamples, totaling ~1.06 g)
15455_A2	0.1152	0.362	0.351	3.122	3.43	7.82	9.04	8.93	0.13719	±7	0.560	±13	0.531
15455_A3a	0.0988	0.513	0.505	4.530	4.97	11.3	12.9	12.3	0.13690	±6	0.546	±10	0.527
15455_B1a	0.0992	0.645	0.643	5.638	6.06	14.1	16.2	15.3	0.13785	±6	0.552	±8	0.539
15455_B2a	0.1035	0.682	0.684	6.146	6.62	15.1	17.5	16.3	0.13682	±7	0.535	±7	0.526
15455_C1	0.0986	0.638	0.634	5.541	6.05	14.3	16.0	15.3	0.13799	±6	0.556	±8	0.541
15455_A3b	0.0889	0.612	0.574	5.064	5.43	12.9	14.8	14.2	0.13759	±5	0.583	±11	0.536
15455_A3c	0.0965	0.539	0.525	4.870	5.23	11.7	13.4	12.9	0.13553	±5	0.534	±10	0.510
15455_B1b	0.0897	0.856	0.850	7.551	8.27	18.9	21.3	19.5	0.13731	±5	0.547	±7	0.532
15455_B2b	0.0877	0.642	0.636	5.625	6.14	14.2	16.3	15.6	0.13746	±6	0.551	±9	0.534
15455_B1c	0.0953	0.449	0.440	3.935	4.33	9.9	11.4	11.0	0.13702	±6	0.550	±12	0.529
15455_C2	0.0882	0.590	0.580	5.134	5.53	13.1	14.9	14.8	0.13746	±5	0.554	±10	0.534
Average		0.59	0.58	5.15	5.59	12.9	14.8	14.1	0.1372	±4	0.553	±10	0.531

Apollo 16 ancient regolith breccia Clast 60016,286b (7 silicate subsmaples, totaling ~0.291 g)
,286b_A1	0.0603	1.370	1.313	11.25	12.3	28.4	40.8	38.3	0.13884	±7	0.587	±7	0.552
,286b_B1	0.0591	1.421	1.397	12.05	13.0	31.6	36.9	38.2	0.13856	±8	0.569	±6	0.548
,286b_C1	0.0492	1.385	1.411	12.10	13.3	31.9	39.3	40.2	0.13878	±6	0.552	±8	0.551
,286b_D1	0.0743	1.687	1.638	14.54	15.1	35.3	43.6	43.9	0.13732	±7	0.560	±5	0.532
,286b_A2	0.0178	1.230	1.195	10.23	10.7	26.4	31.8	35.0	0.13890	±6	0.580	±25	0.552
,286b_A3	0.0124	1.180	1.108	10.16	10.1	24.7	33.0	30.4	0.13597	±9	0.560	±37	0.515
,286b_C2	0.0181	2.229	2.236	18.65	21.5	45.8	116	53.5	0.14004	±7	0.577	±13	0.567
Average		1.50	1.47	12.75	13.7	32.2	44.3	40.4	0.1383	±10	0.569	±10	0.545

Apollo 16 ancient regolith breccia Clast 60016,290b (9 silicate subsmaples and 2 metal globules, totaling ~0.286 g)
,290b_A1b	0.0218	2.633	2.656	24.30	26.5	55.4	92.7	74.4	0.13607	±8	0.523	±8	0.516
,290b_A1c	0.0193	2.677	2.638	22.16	23.8	56.5	68.7	76.2	0.13973	±7	0.583	±10	0.563
,290b_B1b	0.0279	2.510	2.481	21.05	22.7	53.0	78.2	69.9	0.13926	±7	0.575	±8	0.557
,290b_B1c	0.0294	2.415	2.451	20.44	22.2	54.6	63.2	69.2	0.14003	±9	0.570	±8	0.567
,290b_B2b	0.0189	2.075	1.955	16.24	17.2	42.8	51.3	60.7	0.14023	±8	0.617	±15	0.569
,290b_B2c	0.0200	3.466	3.399	28.62	29.8	73.3	89.5	99.0	0.13962	±8	0.584	±8	0.561
,290b_A1	0.0653	2.862	2.688	23.85	24.3	58.9	70.7	71.4	0.13735	±8	0.579	±3	0.533
,290b_B1a	0.0405	2.662	2.578	21.53	23.2	57.0	65.8	77.2	0.13998	±8	0.597	±6	0.566
,290b_B2a	0.0423	2.407	2.282	19.23	20.5	52.6	58.7	74.7	0.13957	±7	0.604	±6	0.561
Metals
,290b_M1	0.000320	109	102	868	969	2209	3087	2950	0.13911	±11	0.605	±17	0.555
,290b_M2	0.000091	114	110	948	1038	2345	2901	2775	0.13838	±8	0.579	±52	0.546
Average		2.80	2.71	23.20	24.6	59.3	74.0	78.2	0.1390	±8	0.583	±15	0.554

Apollo 16 impact melt 60235,11 (10 silicate subsamples, totalling ~1.16 g)
60235_A1	0.1423	0.721	0.569	5.167	6.00	11.67	14.97	13.23	0.13636	±16	0.672		0.521
60235_A2	0.1321	0.778	0.560	5.343	5.26	11.44	14.53	15.04	0.13444	±16	0.702		0.497
60235_B1	0.1514	1.456	1.436	12.96	13.68	27.52	34.02	30.47	0.13666	±16	0.541		0.525
60235_B2	0.0593	0.653	0.536	4.829	5.64	10.72	15.59	15.21	0.13672	±55	0.651		0.526
60235_C1	0.1032	0.356	0.267	2.525	2.07	5.91	10.43	7.89	0.13477	±16	0.679		0.501
60235_C2	0.0825	0.732	0.681	6.191	6.52	13.17	17.40	16.08	0.13636	±16	0.570		0.521
60235_D1	0.1003	0.764	0.668	5.846	6.04	12.53	17.15	13.23	0.13796	±24	0.630		0.541
60235_D2	0.1426	0.766	0.870	7.760	7.94	16.56	20.17	17.53	0.13715	±32	0.476		0.531
60235_E	0.1152	n.d.	0.754	7.001	7.76	15.08	20.11	19.96	0.13547	±12	1.112		0.510
60235_F	0.1277	0.887	0.747	6.788	6.81	14.84	19.43	16.79	0.13638	±10	0.629		0.521
average		0.744	0.745	6.768	7.10	14.63	19.05	17.12	0.1362	±10	0.645		0.519

Apollo 16 impact melt 60635,18 (10 silicate subsamples, totalling ~1.43 g)
60635_A1	0.1698	1.213	1.232	13.52	14.0	21.2	29.4	18.3	0.12930	±7	0.432		0.432
60635_A2	0.0934	1.374	1.432	15.51	15.7	24.8	35.4	18.5	0.12975	±18	0.440		0.437
60635_A3	0.1741	1.360	1.416	15.40	14.8	26.3	32.5	21.4	0.12960	±15	0.425		0.436
60635_B1	0.1966	0.973	1.057	11.02	10.7	17.6	23.2	n.d.	n.d.		0.425		0.400
60635_B2	0.1441	0.836	1.009	9.416	9.40	15.2	19.3	12.9	0.12970	±23	0.428		0.437
60635_B3	0.1865	0.913	1.015	10.11	9.80	16.4	20.5	9.70	0.13278	±29	0.435		0.476
60635_B4	0.1512	0.929	0.952	10.57	11.0	17.3	20.9	10.4	0.12891	±15	0.424		0.427
60635_C	0.1222	0.927	0.945	10.47	11.3	17.2	20.7	14.2	0.12898	±18	0.427		0.428
60635_D1	0.1019	0.831	0.906	9.391	9.93	15.9	18.0	10.5	0.13129	±78	0.426		0.457
60635_D2	0.0903	1.844	1.961	21.21	21.9	35.6	41.0	28.1	0.12981	±23	0.419		0.438
average		1.063	1.131	11.97	12.4	20.1	25.4	15.5	0.1297	±9	0.428		0.437

Apollo 16 melt breccia 62295,18 (9 silicate subsamples, totalling ~0.90 g)
62295_A	0.0884	0.394	0.382	3.649	3.85	8.58	11.63	12.31	0.13433	±15	0.520		0.495
62295_B1	0.1283	0.373	0.357	3.604	3.75	7.82	10.67	8.94	0.13232	±17	0.499		0.470
62295_B2	0.0754	0.492	0.478	4.571	4.73	9.74	14.29	11.09	0.13436	±22	0.519		0.496
62295_B3	0.0772	0.324	0.375	3.031	3.20	6.95	10.07	8.77	n.d.		0.515
62295_C1	0.1027	n.d.	0.341	3.290	3.53	7.23	10.60	9.05	0.13398	±22	2.844		0.491
62295_C2	0.1165	0.796	1.042	6.857	7.25	15.54	20.59	18.97	0.13573	±22	0.559		0.513
62295_C3	0.0955	0.149	0.124	1.202	1.38	2.85	5.51	3.54	0.13427	±32	0.599		0.495
62295_C4	0.1235	3.266	3.166	28.46	29.35	59.53	80.46	67.76	0.13682	±13	0.553		0.527
62295_C5	0.0912	0.411	0.404	3.958	4.20	8.60	11.78	11.62	0.13289	±24	0.501		0.477
average	0.8988	0.870	0.824	7.223	7.54	15.57	21.45	18.53	0.1343	±10	0.662		0.495

Apollo 16 impact melt 63549,33 (9 silicate subsamples, totalling ~0.69 g)
63549_A1	0.1127	n.d.	0.786	8.531	8.62	14.31	17.20	20.00	0.12971	±23	0.977		0.437
63549_A2	0.0729	n.d.	0.833	9.295	9.46	14.68	19.07	16.16	0.12878	±18	2.173		0.425
63549_B1	0.1023	0.715	0.766	8.337	8.06	13.68	16.88	17.59	0.12961	±15	0.413		0.436
63549_B2	0.0807	0.707	0.749	8.156	8.12	13.34	16.89	16.11	0.12960	±10	0.418		0.436
63549_B3	0.0722	0.766	0.836	9.073	8.88	14.42	21.36	17.43	0.12973	±18	0.407		0.437
63549_B4	0.0503	n.d.	0.733	8.184	8.21	13.16	21.24	15.13	0.12874	±69	0.891		0.425
63549_C1	0.0758	1.071	1.131	12.056	12.35	20.20	26.88	22.03	0.13032	±18	0.428		0.445
63549_C2	0.0718	0.750	0.884	8.656	8.15	14.64	n.d.	12.77	0.13344	±26	0.417		0.484
63549_C3	0.0523	0.959	0.981	10.437	10.03	17.65	23.09	26.19	0.13040	±18	0.443		0.446
average		0.819	0.814	9.114	9.03	15.00	17.76	18.10	0.1300	±9	0.725		0.441

Apollo 16 ancient regolith breccia Clast 65095,106b (8 subsamples, totaling ~0.201 g)
65095_A1	0.0385	4.394	4.348	38.13	38.1	81.5	106.0	84.6	0.13785	±7	0.556	±4	0.539
65095_B1	0.0346	1.805	1.696	14.89	14.6	34.8	43.6	39.9	0.13781	±10	0.585	±9	0.539
65095_C1	0.0406	2.549	2.466	21.23	22.6	51.7	63.1	65.8	0.13864	±6	0.580	±6	0.549
65095_A1	0.0152	6.146	6.427	58.09	60.7	110	169	104	0.13658	±6	0.510	±5	0.523
65095_B1	0.0240	2.918	3.032	27.58	29.1	54.4	81.6	56.7	0.13632	±6	0.510	±7	0.520
65095_C1	0.0199	1.411	1.364	11.46	12.3	29.5	62.5	36.0	0.13972	±10	0.595	±20	0.563
65095_D	0.0142	0.680	0.567	4.384	5.23	17.2	25.4	25.0	0.14353	±15	0.749	±53	0.611
65095_C2	0.0142	0.891	0.800	6.218	7.20	21.7	47.6	29.3	0.14328	±11	0.692	±48	0.608
Average		2.71	2.67	23.50	24.5	52.5	74.3	58.4	0.1392	±20	0.597	±59	0.556

Apollo 16 basaltic impact melt breccia 67095,125 (10 silicate subsamples and 5 metal globules, totaling ~1.20 g)
67095_B1	0.1120	0.244	0.250	2.361	2.45	4.26	6.10	4.58	0.13482	±8	0.499	±16	0.501
67095_B2	0.1672	0.128	0.130	1.198	1.25	2.54	3.27	3.22	0.13570	±10	0.516	±21	0.512
67095_C1	0.1678	0.179	0.187	1.778	1.88	3.97	5.13	4.35	0.13464	±7	0.486	±14	0.498
67095_D1	0.1625	0.270	0.279	2.618	2.73	5.41	7.17	5.68	0.13501	±7	0.497	±10	0.503
67095_E1	0.0975	0.260	0.271	2.579	2.68	5.30	6.90	5.36	0.13456	±8	0.486	±17	0.497
67095_B3	0.0865	0.383	0.378	3.323	3.49	7.33	9.21	8.75	0.13770	±6	0.539	±15	0.537
67095_B4	0.0790	0.154	0.146	1.363	1.47	2.96	3.61	3.78	0.13536	±14	0.503	±39	0.507
67095_C2	0.1308	0.106	0.105	1.015	1.10	2.20	2.79	2.21	0.13386	±11	0.469	±31	0.488
67095_D2	0.1156	0.172	0.168	1.643	1.74	3.51	4.24	3.65	0.13337	±6	0.481	±22	0.482
67095_E2	0.0851	0.706	0.723	6.935	7.16	13.6	17.3	13.4	0.13419	±6	0.483	±7	0.493
Metals
67095_M1	0.000222	159	158	1439	1511	2840	4161	3222	0.13613	±5	0.532	±14	0.517
67095_M3	0.001453	29.5	29.6	275	284	567	1051	590	0.13547	±9	0.517	±11	0.509
67095_M4	0.000168	140	136	1118	1165	2371	3368	3026	0.14056	±10	0.603	±24	0.573
67095_M9	0.000057	186	208	1965	1775	3532	5028	3667	0.13480	±9	0.517	±39	0.500
67095_M10	0.000133	170	160	1412	1458	2972	3793	3353	0.13771	±6	0.582	±24	0.537
Average		0.35	0.35	3.28	3.41	6.74	10.0	7.37	0.1356	±10	0.514	±20	0.527

Apollo 16 impact melt 68416,16 (10 silicate subsamples, totaling ~0.80 g)
68416_A1	0.0865	0.363	0.356	3.737	3.79	7.04	8.47	5.42	0.13080	±10	0.469	±14	0.450
68416_B1	0.0839	0.311	0.306	3.372	3.40	5.80	8.40	4.30	0.12912	±9	0.445	±15	0.428
68416_C1	0.0776	0.350	0.335	3.693	3.78	6.48	7.76	4.72	0.12919	±9	0.456	±16	0.429
68416_D1	0.0923	0.464	0.446	4.910	5.03	8.60	11.45	6.32	0.12919	±8	0.455	±10	0.429
68416_A2	0.0681	1.039	1.062	11.33	11.7	19.9	33.0	15.9	0.13028	±6	0.442	±6	0.443
68416_B2	0.0808	0.323	0.326	3.675	3.73	6.18	8.47	3.10	0.12837	±7	0.424	±15	0.419
68416_C2	0.0811	0.303	0.311	3.434	3.57	6.00	8.71	3.34	0.12914	±8	0.426	±15	0.429
68416_D2	0.0813	1.275	1.279	13.83	14.0	23.5	31.9	18.4	0.12981	±7	0.444	±4	0.437
68416_E	0.0679	0.381	0.385	4.203	4.31	7.32	12.68	4.18	0.12946	±8	0.437	±16	0.433
68416_F1	0.0838	1.489	1.493	15.50	16.3	28.3	37.0	24.0	0.13124	±6	0.463	±4	0.455
Average	0.8032	0.63	0.63	6.72	6.91	11.84	16.54	8.93	0.1297	±6	0.446	±9	0.435

Estimated uncertainties for concentration data are on average better than 0.5 % for Os and Ir, 1 % for Ir, Pt and Pd, and 5 % for Re.

^a.

Re*calc represents calculated Re concentrations as stated in text, so forth ¹⁸⁷Re/¹⁸⁸Os_calc versus ¹⁸⁷Re/¹⁸⁸Os_meas.

^b.

Errors in ¹⁸⁷Os/¹⁸⁸Os and ¹⁸⁷Re/¹⁸⁸Os_meas of subsamples of a given impact rock are shown as ±2σ and refer to the last decimal places (Errors for ¹⁸⁷Re/¹⁸⁸Os_meas were estimated assuming 100 % variation in the blank contribution).

^c.

Mass-weighted averages for the concentration data, and simple averages (±2σ_mean) for ¹⁸⁷Os/¹⁸⁸Os.