Sm–Nd isotope systematics by laser ablation-multicollector-inductively coupled plasma mass spectrometry: Methods and potential natural and synthetic reference materials

Fisher, Colleen; McFarlane, Christopher R.M.; Hanchar, John M.; Schmitz, Mark D.; Sylvester, Paul J.; Lam, Rebecca; Longerich, Henry P.

doi:10.1016/j.chemgeo.2011.01.012

Cited by 101 publications

(88 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Our 143 Nd/ 144 Nd results for Ap1 and Ap2 of 0.511341 ± 23 (2SD) and 0.510999 ± 56 (2SD), respectively, agree well with those reported by from Yang et al (2008); Ap1 = 0.511342 ± 31 (2SD) and Ap2 = 0.510977 ± 39 (2SD). Our analyses of Durango apatite gave 143 Nd/ 144 Nd values of 0.512467 ± 48 (2SD), which is in good agreement with the ratios acquired by LA-MC-ICP-MS reported in Foster and Vance (2006) (0.512469 ± 25) (2SD) and by Fisher et al (2011) (0.512463 ± 48), and the TIMS value of 0.512489 ± 12 (Fisher et al 2011). Our 143 Nd/ 144 Nd result for the LREE glass is 0.512096 ± 16 (2SD) which is indistinguishable from the value determined by TIMS (0.512098 ± 13, (Fisher et al 2011).…”

Section: In Situ Sm-nd Isotope Microanalysissupporting

confidence: 92%

“…Our analyses of Durango apatite gave 143 Nd/ 144 Nd values of 0.512467 ± 48 (2SD), which is in good agreement with the ratios acquired by LA-MC-ICP-MS reported in Foster and Vance (2006) (0.512469 ± 25) (2SD) and by Fisher et al (2011) (0.512463 ± 48), and the TIMS value of 0.512489 ± 12 (Fisher et al 2011). Our 143 Nd/ 144 Nd result for the LREE glass is 0.512096 ± 16 (2SD) which is indistinguishable from the value determined by TIMS (0.512098 ± 13, (Fisher et al 2011). Sm-Nd isochrons were calculated from 147 Sm/ 144 Nd and 147 Sm/ 144 Nd ratios of coexisting allanite and apatite using Isoplot (Ludwig 2012).…”

Section: In Situ Sm-nd Isotope Microanalysissupporting

confidence: 92%

“…In situ laser ablation analyses were conducted on polished thin sections over 60 s with spot sizes of 16-90 μm, pulse rates of 4 Hz, and a laser energy density at the sample site of 3-6 J/cm 2 . Interference and mass bias corrections were made according to the method of Fisher et al (2011). The 147 Sm/ 144 Nd ratios were calibrated against a synthetic LREE-rich silicate glass ( 147 Sm/ 144 Nd = 0.2451; (Fisher et al 2011), which was routinely analysed throughout each session.…”

Section: In Situ Sm-nd Isotope Microanalysismentioning

confidence: 99%

“…The 147 Sm/ 144 Nd ratios were calibrated against a synthetic LREE-rich silicate glass ( 147 Sm/ 144 Nd = 0.2451; (Fisher et al 2011), which was routinely analysed throughout each session. Sample mineral 143 Nd/ 144 Nd ratios were further normalised to bracketing analyses of Nd-doped glass (JNdi-1, TIMS 143 Nd/ 144 Nd = 0.512098 ± 13, (Fisher et al 2011).…”

Section: In Situ Sm-nd Isotope Microanalysismentioning

confidence: 99%

See 3 more Smart Citations

Genesis of the central zone of the Nolans Bore rare earth element deposit, Northern Territory, Australia

Schoneveld

Spandler

Hussey³

2015

Contrib Mineral Petrol

View full text Add to dashboard Cite

north and south-east zones. Breccia types BX2, BX3, and BX4 represent progressive stages of ore brecciation and development of calc-silicate mineral (amphibole, epidote, allanite, calcite) infill. Comparison of bulk ore sample geochemistry between breccia types indicates that REEs were not mobilised more than a few centimetres during hydrothermal alteration and brecciation. Instead, most of the REEs were partitioned from the original REE fluorapatite into newly formed allanite, REE-poor fluorapatite and minor REE carbonate in the breccias. Negative europium (Eu) anomalies in the breccia minerals are accounted for by a large positive Eu anomaly in epidote from the alteration zones surrounding the ore breccias. This observation provides a direct link between ore recrystallisation and brecciation, and the formation of the alteration halo in the surrounding host rocks. Where allanite and fluorapatite are texturally related, the fluorapatite is relatively depleted in the light rare earth elements (LREEs), whereas allanite is relatively LREE enriched, suggesting co-crystallisation. We tentatively date the BX1 ore stage to 1440 ± 80 Ma based on U-Pb dating of thorianite. Sm-Nd isotope isochrons derived from in situ isotope analysis of cognate apatite and allanite date the BX2 and BX3 events to ca. 400 Ma, while U-Pb dating of late-stage monazite from the BX4 ore stage returned an age of ca. 350 Ma. Therefore, formation of the central zone at Nolans Bore involved multiple alteration/brecciation events that collectively span over 1 billion years in duration. We suggest that the BX1-type veins and breccias were formed from REE-rich, saline (Fand Cl-bearing) fluids that infiltrated the granulite-grade host rocks in association with either shear activation events of the Redbank Shear Zone (1500-1400 Ma) or intrusion of late-stage pegmatites of the Mt Boothby area. BX2, BX3, and BX4 events record deformation and hydrothermal alteration associated with the Alice Springs Orogeny Abstract The Nolans Bore rare earth element (REE) deposit consists of a network of fluorapatite-bearing veins and breccias hosted within Proterozoic granulites of the Reynolds Range, Central Australia. Mineralisation is divided into three zones (north, central, and south-east), with the north and south-east zones consisting of massive REE-bearing fluorapatite veins, with minor brecciation and carbonate infill. The central zone is distinctively different in mineralogy and structure; it features extensive brecciation, a high allanite content, and a large, epidote-rich enveloping alteration zone. The central zone is a reworking of the original solid apatite veins that formed during the Chewings Orogeny at ca. 1525 Ma. These original apatite veins are thought to derive from phosphate-rich magmatic-hydrothermal fluid exsolved from as-yet unrecognised alkaline magmatic bodies at depth. We define four ore breccia types (BX1-4) in the central zone on the basis of detailed petrological and geochemical analysis of drillcore and thin sections. BX1 ore comprises fl...

show abstract

Section: In Situ Sm-nd Isotope Microanalysissupporting

confidence: 92%

Section: In Situ Sm-nd Isotope Microanalysissupporting

confidence: 92%

Section: In Situ Sm-nd Isotope Microanalysismentioning

confidence: 99%

Section: In Situ Sm-nd Isotope Microanalysismentioning

confidence: 99%

See 2 more Smart Citations

Genesis of the central zone of the Nolans Bore rare earth element deposit, Northern Territory, Australia

Schoneveld

Spandler

Hussey³

2015

Contrib Mineral Petrol

View full text Add to dashboard Cite

show abstract

“…The 147 Sm/ 149 Sm ratio of 1.08680 (Dubois et al, 1992) and 144 Sm/ 149 Sm ratio of 0.22332 (Isnard et al, 2005) were used for correction. The in-house AFK perovskite standard was used for the external corrections of 147 Sm/ 144 Nd and 143 Nd/ 144 Nd (cf., Fisher et al, 2011;Iizuka et al, 2011). Our analyses yielded an average 143 Nd/ 144 Nd ratio of 0.512592 ± 22 for the AFK perovskite (reference value of 0.512609 ± 27, Wu et al, 2013a).…”

Section: Sample Preparation and Analytical Methodsmentioning

confidence: 96%

Repeated kimberlite magmatism beneath Yakutia and its relationship to Siberian flood volcanism: Insights from in situ U–Pb and Sr–Nd perovskite isotope analysis

Sun

Liu

Tappe

et al. 2014

Earth and Planetary Science Letters

118

View full text Add to dashboard Cite

Simultaneous in situ determination of U‐Pb and Sm‐Nd isotopes in monazite by laser ablation ICP‐MS

Goudie

Fisher

Hanchar

et al. 2014

Geochem Geophys Geosyst

Self Cite

View full text Add to dashboard Cite

Results are presented for in situ simultaneous determination of U-Pb and Sm-Nd isotopes in monazite using the Laser Ablation Split-Stream (LASS) method. This method uses a laser ablation system coupled to a magnetic-sector inductively coupled plasma mass spectrometer (HR) (ICP-MS) for measuring U-Pb isotopes and a multicollector (MC) ICP-MS for measuring Sm-Nd isotopes. Ablated material is split using a Y-connector and transported simultaneously to both mass spectrometers. In addition to Sm and Nd isotopes, the MC-ICP-MS is configured to also acquire Ce, Nd, Sm, Eu, and Gd elemental abundances. This approach provides age, tracer isotope, and trace element data in the same ablation volume, reducing sampling problems associated with fine-scale zoning in accessory minerals and minimizing the material needed for ablation. Precision and accuracy of the U-Pb method (and the precision of the Sm-Nd method) is demonstrated with results from well-characterized monazite reference materials. The LASS results agree within uncertainty with the isotope dilution thermal ionization mass spectrometry (ID-TIMS) U-Pb dates. The accuracy of the Sm-Nd method is assessed by comparing the LA-MC-ICP-MS results with ID-TIMS determinations on a well-characterized, in-house monazite reference material. The LASS method is then applied to monazite from the Birch Creek Pluton in the White Mountains of California as a case study to illustrate the utility of this method for solving geologic problems. The U-Pb ages and Sm-Nd isotopic data from the LASS method support the conclusions drawn from previous results that monazite can record timing and information about the source region(s) of hydrothermal fluids.

show abstract

Sm–Nd isotope systematics by laser ablation-multicollector-inductively coupled plasma mass spectrometry: Methods and potential natural and synthetic reference materials

Cited by 101 publications

References 32 publications

Genesis of the central zone of the Nolans Bore rare earth element deposit, Northern Territory, Australia

Genesis of the central zone of the Nolans Bore rare earth element deposit, Northern Territory, Australia

Repeated kimberlite magmatism beneath Yakutia and its relationship to Siberian flood volcanism: Insights from in situ U–Pb and Sr–Nd perovskite isotope analysis

Simultaneous in situ determination of U‐Pb and Sm‐Nd isotopes in monazite by laser ablation ICP‐MS

Contact Info

Product

Resources

About