Tracing the provenance and recrystallization processes of the Earth's oldest detritus at Mt. Narryer and Jack Hills, Western Australia: An in situ Sm–Nd isotopic study of monazite

Iizuka, Tsuyoshi; Nebel, Oliver; McCulloch, Malcolm T.

doi:10.1016/j.epsl.2011.06.006

Cited by 24 publications

(6 citation statements)

References 68 publications

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“…The Sm‐Nd isotopic system in monazite has been used as an isotopic tracer [ Tomascak et al ., ; McFarlane and McCulloch , ; Iizuka et al ., ], but it can also be used in tandem with a mineral with contrasting Sm‐Nd as a geochronometer by producing improved isochrons [ Evans and Zalasiewicz , ]. The Sm‐Nd isotopic system is particularly useful for source region investigations, as both Sm and Nd are relatively immobile elements [ DePaolo , ], are part of the monazite structure and would not be expected to readily diffuse out of the crystal during a thermal event, and large‐scale fractionation of Sm and Nd during most crustal processes is not expected.…”

Section: Introductionmentioning

confidence: 99%

“…This is ideal for U‐Th‐Pb detrital monazite studies, in which a large number of grains need to be analyzed in order to obtain a statistically valid data set [ Hietpas et al ., ; Moecher et al ., ]. In detrital studies, Sm‐Nd isotopes can be used as a tracer of the source rocks in which the monazite originally crystallized, and the compositional zoning can reveal information about the metamorphic or igneous history of the monazite [ Ross et al ., ; Iizuka et al ., ]. Recently, Hietpas et al .…”

Section: Introductionmentioning

confidence: 99%

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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

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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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

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“…Alternatively, such highly depleted mantle reservoirs were attributed to early global differentiation of silicate earth by Boyet and Carlson (2005). More recent studies also document the existence of terrestrial crust as old as 4.37 Ga (Holden et al 2009;Iizuka et al 2011;Roth et al 2013). Consequently the above arguments suggest that the Palaeoarchaean mantle was highly heterogeneous but generally variably depleted.…”

Section: Implications For the Archaean Mantlementioning

confidence: 96%

Physical volcanology and geochemistry of Palaeoarchaean komatiite lava flows from the western Dharwar craton, southern India: implications for Archaean mantle evolution and crustal growth

Jayananda

Duraiswami

Aadhiseshan

et al. 2016

International Geology Review

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Palaeoarchaean (3.38-3.35 Ga) komatiites from the Jayachamaraja Pura (J.C. Pura) and Banasandra greenstone belts of the western Dharwar craton, southern India were erupted as submarine lava flows. These high-temperature (1450-1550°C), low-viscosity lavas produced thick, massive, polygonal jointed sheet flows with sporadic flow top breccias. Thick olivine cumulate zones within differentiated komatiites suggest channel/conduit facies. Compound, undifferentiated flow fields developed marginal-lobate thin flows with several spinifex-textured lobes. Individual lobes experienced two distinct vesiculation episodes and grew by inflation. Occasionally komatiite flows form pillows and quench fragmented hyaloclastites. J.C. Pura komatiite lavas represent massive coherent facies with minor channel facies, whilst the Bansandra komatiites correspond to compound flow fields interspersed with pillow facies. The komatiites are metamorphosed to greenschist facies and consist of serpentine-talc ± carbonate, actinolite-tremolite with remnants of primary olivine, chromite, and pyroxene. The majority of the studied samples are komatiites (22.46-42.41 wt.% MgO) whilst a few are komatiitic basalts (12.94-16.18 wt.% MgO) extending into basaltic (7.71 -10.80 wt.% MgO) composition. The studied komatiites are Al-depleted Barberton type whilst komatiite basalts belong to the Al-undepleted Munro type. Trace element data suggest variable fractionation of garnet, olivine, pyroxene, and chromite. Incompatible element ratios (Nb/Th, Nb/U, Zr/Y Nb/Y) show that the komatiites were derived from heterogeneous sources ranging from depleted to primitive mantle. CaO/Al 2 O 3 and (Gd/Yb) N ratios show that the Al-depleted komatiite magmas were generated at great depth (350-400 km) by 40-50% partial melting of deep mantle with or without garnet (majorite?) in residue whilst komatiite basalts and basalts were generated at shallow depth in an ascending plume. The widespread Palaeoarchaean deep depleted mantle-derived komatiite volcanism and sub-contemporaneous TTG accretion implies a major earlier episode of mantle differentiation and crustal growth during ca. 3.6-3.8 Ga.ARTICLE HISTORY

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“…The application of monazite to studies of detrital provenance has begun to receive interest in the geochemical community (e.g., Hietpas et al, ). More recently, in a manner similar to that of measuring the Hf isotope composition of zircon, researchers have begun to apply Sm‐Nd isotope systematics to detrital monazite (Iizuka et al, ), some of them employing the LASS approach (Liu et al, ). The potential precision and accuracy of the LASS method to studies of detrital monazite can be assessed by examining the initial ɛ Nd calculated for each grain, using its measured 207 Pb/ 206 Pb age.…”

Section: Case Studies Utilizing the Newly Developed Iolite Featuresmentioning

confidence: 99%

Data Reduction of Laser Ablation Split‐Stream (LASS) Analyses Using Newly Developed Features Within Iolite: With Applications to Lu‐Hf + U‐Pb in Detrital Zircon and Sm‐Nd +U‐Pb in Igneous Monazite

Fisher

Paton

Pearson

et al. 2017

Geochem Geophys Geosyst

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A robust platform to view and integrate multiple data sets collected simultaneously is required to realize the utility and potential of the Laser Ablation Split‐Stream (LASS) method. This capability, until now, has been unavailable and practitioners have had to laboriously process each data set separately, making it challenging to take full advantage of the benefits of LASS. We describe a new program for handling multiple mass spectrometric data sets collected simultaneously, designed specifically for the LASS technique, by which a laser aerosol is been split into two or more separate “streams” to be measured on separate mass spectrometers. New features within Iolite (https://iolite-software.com) enable the capability of loading, synchronizing, viewing, and reducing two or more data sets acquired simultaneously, as multiple DRSs (data reduction schemes) can be run concurrently. While this version of Iolite accommodates any combination of simultaneously collected mass spectrometer data, we demonstrate the utility using case studies where U‐Pb and Lu‐Hf isotope composition of zircon, and U‐Pb and Sm‐Nd isotope composition of monazite were analyzed simultaneously, in crystals showing complex isotopic zonation. These studies demonstrate the importance of being able to view and integrate simultaneously acquired data sets, especially for samples with complicated zoning and decoupled isotope systematics, in order to extract accurate and geologically meaningful isotopic and compositional data. This contribution provides instructions and examples for handling simultaneously collected laser ablation data. An instructional video is also provided. The updated Iolite software will help to fully develop the applications of both LASS and multi‐instrument mass spectrometric measurement capabilities.

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Tracing the provenance and recrystallization processes of the Earth's oldest detritus at Mt. Narryer and Jack Hills, Western Australia: An in situ Sm–Nd isotopic study of monazite

Cited by 24 publications

References 68 publications

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

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

Physical volcanology and geochemistry of Palaeoarchaean komatiite lava flows from the western Dharwar craton, southern India: implications for Archaean mantle evolution and crustal growth

Data Reduction of Laser Ablation Split‐Stream (LASS) Analyses Using Newly Developed Features Within Iolite: With Applications to Lu‐Hf + U‐Pb in Detrital Zircon and Sm‐Nd +U‐Pb in Igneous Monazite

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