The trace element composition of apatite and its application to detrital provenance studies

O’Sullivan, Gary; Chew, David; Kenny, Gavin G.; Henrichs, Isadora; Mulligan, Dónal

doi:10.1016/j.earscirev.2019.103044

Cited by 182 publications

(149 citation statements)

References 125 publications

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“…Apatite trace element Sr/Y versus LREE plots for (a) all apatites; (b) Caledonian‐; and (c) peri‐Gondwanan‐ aged apatites plotted against a database as in O'Sullivan et al (2020). ALK, alkali‐rich igneous rocks; HM, partial‐melts/leucosomes/high‐grade metamorphic; IM, mafic I‐type granitoids and mafic igneous rocks; LM, low‐ and medium‐ grade metamorphic and metasomatic; S, S‐type granitoids and high aluminium saturation index (ASI) ‘felsic’ I‐types; UM, ultramafic rocks including carbonatites, lherzolites and pyroxenites…”

Section: Resultsmentioning

confidence: 99%

“…Data were processed using the Iolite 2.5 package, using NIST612 as the primary standard (Pearce et al., 1997) and Durango and McClure apatites as secondary trace element standards (Chew et al., 2016). Detrital apatite source compositions were determined using the methodology of O'Sullivan et al (2020). In that paper, Principal Component Analysis (PCA) of apatite trace element data from a compilation of 22 publications representing ca.…”

Section: Methodsmentioning

confidence: 99%

“…A machine learning method (support vector machine) is then applied to Sr/Y versus LREE biplots of bedrock data to generate a predictive model for unknown classification. More details on the methodology can be found in O'Sullivan et al (2020).…”

Section: Methodsmentioning

confidence: 99%

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Constraining recycled detritus in quartz‐rich sandstones: Insights from a multi‐proxy provenance study of the Mid‐Carboniferous, Clare Basin, western Ireland

Nauton‐Fourteu

Tyrrell

Morton³

et al. 2020

Basin Research

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Quartz‐rich sandstones can be produced through multiple sedimentary processes, potentially acting in combination, such as extensive sedimentary recycling or intense chemical weathering. Determining the provenance of such sedimentary rocks can be challenging due to low amounts of accessory minerals, the fact that the primary mineralogy may have been altered during transport, storage or burial and difficulties in the recognition of polycyclic components. This study uses zircon and apatite U‐Pb geochronology, apatite trace elements, zircon‐tourmaline‐rutile indices and petrographic observations to investigate the sedimentary history of mineralogically mature mid‐Carboniferous sandstones of the Tullig Cyclothem, Clare Basin, western Ireland. The provenance data show that the sandstones have been dominantly and ultimately sourced from three basement terranes: older Laurentian‐ associated rocks (ca. 900–2500 Ma) which lay to the north of the basin, peri‐Gondwanan terranes (ca. 500–700 Ma) to the south and igneous intrusive rocks associated with the Caledonian Orogenic Cycle (ca. 380–500 Ma). However, the multi‐proxy approach also helps constrain the sedimentary history and suggests that not all grain populations were derived directly from their original source. Grains with a Laurentian or a Caledonian affinity have likely been recycled through Devonian basins to the south. Grains with a peri‐Gondwanan affinity appear to be first cycle and are potentially derived from south/southwest of the basin. Taken as a whole, these data are consistent with input into the basin from the south and southwest, with the reworking of older sedimentary rocks, rather than intensive first‐cycle chemical weathering, likely explaining the compositional maturity of the sandstones. This study highlights the need for a multi‐proxy provenance approach to constrain sedimentary recycling, particularly in compositionally mature sandstones, as the use of zircon geochronology alone would have led to erroneous provenance interpretations. Zircon, together with U‐Pb geochronology from more labile phases such as apatite, can help distinguish first‐cycle versus polycyclic detritus.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Constraining recycled detritus in quartz‐rich sandstones: Insights from a multi‐proxy provenance study of the Mid‐Carboniferous, Clare Basin, western Ireland

Nauton‐Fourteu

Tyrrell

Morton³

et al. 2020

Basin Research

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“…The ATi, in contrast to bulk rock geochemical proxies, allows for palaeoweathering information based on the dissolution of a chemically weathering‐sensitive single grain—apatite, over a more robust grain—tourmaline. Moreover, apatite can be dated using U‐Pb geochronology (Chew & Donelick, 2012) and trace elements can be used to further pinpoint sources (O'Sullivan et al, 2018; 2020). Apatite provenance within a sample can thus be well constrained and the identification of variations in sources from sample to sample can be assessed.…”

Section: Discussionmentioning

confidence: 99%

Heavy mineral variations in mid‐Carboniferous deltaic sandstones: Records of a pre‐depositional sediment history?

Nauton‐Fourteu

Tyrrell

Morton³

2020

The Depositional Record

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Sandstone composition is influenced by multiple factors, including acidic weathering, occurring during storage in the hinterland, prior to deposition. This study aims to better understand and constrain how the nature and duration of such pre‐depositional factors might impact the final sediment composition. Mid‐Carboniferous deltaic sandstones from the Clare Basin, western Ireland, for which depositional environments and provenance are well constrained, are the target of this study. Conventional heavy mineral analysis and specific heavy mineral ratios, such as the apatite–tourmaline index are utilised to examine these phenomena. Relatively high apatite–tourmaline index values observed in channelised sandstones contrast with lower values seen in sandstones associated with mouth bar and interdistributary bay facies. These variations are not linked to changes in provenance and thus potentially indicate differences in weathering intensity due to variable duration of alluvial storage. These changes are probably linked with shorter hinterland residence time in the channelised than in mouth bar and interdistributary bay sandstones. Variations are seen in the rutile‐zircon index without any clear link with facies. These fluctuations could be ascribed to variable supply from a source, which is relatively rich in rutile but poor in zircon and apatite. Despite the apatite component in these sandstones being partially derived from recycled sources, the apatite–tourmaline index stills appears to hold information on the last sedimentary cycle.

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“…Detrital apatite and titanite grains exhibit chondrite-normalized REE abundances between 10 1 and 10 5 and present a range of REE patterns (Figures S2a and S1b). However, most of these grains are LREE-enriched and present a strong negative Eu anomaly associated with a magmatic source rock composition (e.g., Belousova et al, 2002a;Olierook et al, 2019;O'Sullivan et al, 2020). A minor portion of detrital titanite grains reveal a positive Eu anomaly and HREE enrichment, associated with a metamorphic source rock type ( Figure S2b).…”

Section: Detrital Zircon Apatite and Titanite Trace Element Geochemmentioning

confidence: 99%

Scratching the Surface: A Marine Sediment Provenance Record From the Continental Slope of Central Wilkes Land, East Antarctica

Tooze

Halpin

Noble

et al. 2020

Geochem Geophys Geosyst

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The subglacial geology of Wilkes Land, East Antarctica, is poorly characterized, due to its concealment beneath 0.4-4 km of thick ice (Fretwell et al., 2013) with sparse coastal rock outcrop. Yet, a better understanding of the ice-covered continental crust has the potential to provide valuable insights into the dynamic tectonic history of East Antarctica and its role during supercontinent cycles (e.g., Aitken et al., 2016a;

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The trace element composition of apatite and its application to detrital provenance studies

Cited by 182 publications

References 125 publications

Constraining recycled detritus in quartz‐rich sandstones: Insights from a multi‐proxy provenance study of the Mid‐Carboniferous, Clare Basin, western Ireland

Constraining recycled detritus in quartz‐rich sandstones: Insights from a multi‐proxy provenance study of the Mid‐Carboniferous, Clare Basin, western Ireland

Heavy mineral variations in mid‐Carboniferous deltaic sandstones: Records of a pre‐depositional sediment history?

Scratching the Surface: A Marine Sediment Provenance Record From the Continental Slope of Central Wilkes Land, East Antarctica

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