Table 1 Sr–Nd–Hf–Pb double-spike isotope data for Tristan-Gough hotspot track samples.

From: How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot

Sample	Age	Lat.	Long.	⁸⁷ Sr/ ⁸⁶ Sr	¹⁴³ Nd/ ¹⁴⁴ Nd	²⁰⁶ Pb/ ²⁰⁴ Pb	²⁰⁷ Pb/ ²⁰⁴ Pb	²⁰⁸ Pb/ ²⁰⁴ Pb	¹⁷⁶ Hf/ ¹⁷⁷ Hf
*Tristan Track*
AK–1695–6	27	−36.45	−7.81	—	0.512654	18.9762	15.6093	39.3651	0.282835
*Gough track*
SO233 DR3–1	66	−32.86	2.50	0.705358	0.512483	18.2685	15.5852	38.9360	—
AII–93–11–8	47	−32.97	−0.02	—	0.512631	18.1120	15.5381	38.4782	0.282799
PS69/420–1–DR 21–1	47	−32.81	2.55	—	0.512423	18.3429	15.5607	39.1694	0.282682
PS69/423–1–DR 25–4	46	−34.92	0.55	0.706357	0.512476	18.2090	15.5770	38.9231	0.282704
PS69/424–1–DR 26–1	46.5	−34.92	0.55	0.704158	0.512694	18.4471	15.5623	38.9972	0.282841
V29–9–1	47	−32.63	1.12	0.704664	0.512694	18.3477	15.5671	38.6352	0.282822
AG51–6–5	8	−40.17	−8.55	0.705545	0.512591	18.4323	15.6010	38.9192	0.282783
AG51–7–1	8	−40.17	−8.55	0.704999	0.512565	18.3014	15.5863	38.8299
AG51–7–2	8	−40.17	−8.55	0.704982	0.512551	18.3086	15.5892	38.8399	0.282763
*Walvis Ridge Gough composition*
CH19 DR3–2	114	−19.37	9.33	0.705919	0.512464	17.9161	15.5279	38.3254	0.282724
CH19 DR4–1	113	−19.85	9.02	0.705709	0.512342	17.5458	15.4796	38.1510	0.282668
CH19 DR4–2	112	−19.85	9.02	0.705607	0.512387	17.5932	15.4933	38.1276	0.282683
WALDA–002–CH19–DR4–03	113	−19.85	9.02	0.705574	0.512397	17.5942	15.4930	38.1328	0.282675
SO233 DR84–2	114	−20.35	7.64	0.706235	0.512308	17.4079	15.4574	38.0939	—
SO233 DR66–1	107	−22.72	7.58	0.704928	0.512612	18.2968	15.5608	38.8369	—
SO233 DR71–1	101	−22.67	5.13	0.704192	0.512472	18.7701	15.6325	38.9967	—
SO233 DR62–1	96	−25.85	6.62	0.705231	0.512519	18.1463	15.5903	38.6825	—
SO233 DR34–1–A	87	−26.29	3.47	0.704735	0.512585	17.9160	15.5376	38.4723	—
V29–11–1	85	−26.15	5.58	0.704724	0.512503	17.9811	15.5529	38.4227	0.282774
CIR 139D–2	85	−26.45	5.89	0.704845	0.512496	17.8002	15.5259	38.3248	0.282725
CIR 139D–3	85	−26.45	5.89	0.704853	0.512509	17.8275	15.5310	38.3558	0.282723
Walvis III DR04–35	79	−27.26	4.39	0.704678	0.512649	18.0587	15.5635	38.4937	0.282841
DSDP Leg 74 525A 53 2W 91–102	71	−29.07	2.99	0.704909	0.512516	17.7478	15.5081	38.2496	0.282756
DSDP Leg 74 525A 56 2W 128–134	71	−29.07	2.99	0.704771	0.512490	17.6759	15.4972	38.1620	0.282748
DSDP Leg 74 525A 57 5W 141–148	72	−29.07	2.99	0.704841	0.512489	17.6544	15.4945	38.1603	0.282747
DSDP Leg 74 525A 63 2W 59–78	72	−29.07	2.99	0.705061	0.512431	17.7753	15.4910	38.2252	0.282702
*Walvis Ridge Tristan composition*
DSDP Leg 74 527 41 1W 47–63	67	−28.04	1.76	0.704144	0.512726	18.2048	15.5267	38.6715	0.282987
DSDP Leg 74 527 41 5W 95–105	67	−28.04	1.76	0.703608	0.512901	18.4908	15.5527	38.5336	0.283060
DSDP Leg 74 527 43 4W 59–73	67	−28.04	1.76	0.704547	0.512611	18.6188	15.5347	39.3297	0.282867
DSDP Leg 74 527 44 4W 59–72	67	−28.04	1.76	0.704427	0.512617	18.5224	15.5281	39.1353	0.282866
DSDP Leg 74 528 42 1W 29–45	58	−28.53	2.32	0.704744	0.512563	18.0458	15.5046	38.8273	0.282818
DSDP Leg 74 528 42 5W 31–46	58	−28.53	2.32	0.703996	0.512771	18.2698	15.5165	38.7332	0.283027
DSDP Leg 74 528 43 2W 80–98	67	−28.53	2.32	0.704092	0.512681	18.2553	15.5161	38.7148	0.282920
DSDP Leg 74 528 45 2W 109–119	67	−28.53	2.32	0.704285	0.512648	18.0917	15.5001	38.7408	0.282916
DSDP Leg 74 528 47 3W 66–80	67	−28.53	2.32	0.704456	0.512634	18.2089	15.5113	38.8174	0.282896
*Rio Grande rise*
RC16–11RD 1	84	−30.43	−36.02	0.705578	0.512353	17.7807	15.4787	38.1734	0.282646
RC16–11RD 2	84	−30.43	−36.02	0.705572	0.512344	17.7866	15.4813	38.1861	0.282647
RC16–12RD 1	84	−30.43	−36.02	0.705687	0.512342	17.7822	15.4839	38.1913	0.282616
RC16–12RD 3	84	−30.43	−36.02	0.705952	0.512273	17.7127	15.4736	38.1437	0.282588
DSDP Leg 72 516F 128 2W 63–84	85	−30.28	−35.29	0.704988	0.512543	17.6396	15.4681	38.1425	0.282843

Full data, including errors are provided in Supplementary Dataset 1. Average 2σ within run errors refer to the least significant digits and are ±5 for ⁸⁷Sr/⁸⁶Sr, ±3 for ¹⁴³Nd/¹⁴⁴Nd, ±5 for ¹⁷⁶Hf/¹⁷⁷Hf, ±11, ±11 and ±33 for ²⁰⁶Pb/²⁰⁴Pb, ²⁰⁷Pb/²⁰⁴Pb and ²⁰⁸Pb/²⁰⁴Pb, respectively. External 2σ errors based on standards measured along with the samples are ±13 for ⁸⁷Sr/⁸⁶Sr, ±7 for ¹⁴³Nd/¹⁴⁴Nd, ±8 for ¹⁷⁶Hf/¹⁷⁷Hf, ±24, ±24 and ±61 for ²⁰⁶Pb/²⁰⁴Pb, ²⁰⁷Pb/²⁰⁴Pb and ²⁰⁸Pb/²⁰⁴Pb, respectively. ⁸⁷Sr/⁸⁶Sr are the least radiogenic values obtained on dual analysis of 2 N HCl leached rock chips at 70 °C for 1 h and 6 N HCl leached powders at 150° for 3 days. Ages in bold are from ref. 24. Ages in italics are either from dated samples from the same site or estimated based on a spatial linear age equation²⁴.

Back to article page

Table 1 Sr–Nd–Hf–Pb double-spike isotope data for Tristan-Gough hotspot track samples.

Search

Quick links