Using magmatic biotite chemistry to differentiate barren and mineralized Silurian–Devonian granitoids of New Brunswick, Canada

Azadbakht, Zeinab; Lentz, David R.; McFarlane, Christopher R.M.; Whalen, J B

doi:10.1007/s00410-020-01703-2

Cited by 39 publications

(17 citation statements)

References 91 publications

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“…Utilizing the run temperature, the fluid parameter log(fHF/fH2O) = 2100/T(K) + IV(F) (Munoz, 1984) was calculated to range from 2.6 to 4.0 during the crystallization of the neoformed biotite. This range in fluid composition agrees well with the one obtained for F in biotite from the barren and mineralized granitoids of New Brunswick, Canada (Azadbakht et al 2020).…”

Section: Mica Compositionsupporting

confidence: 88%

“…Its biotite composition falls within the interval 2.6 < log(fH2O/fHF) < 3.2 at 700 to 725 °C. Such log(fH2O/fHF) compositions are like those obtained for F-rich granitic biotite from the Sn-W mineralized systems of the New Brunswick pluton, Canada (Azadbakht et al 2020). Enrichment in Li, Be, Cs, Nb, Ta, W, Sn, and U is commonly associated with F-rich peraluminous leucogranitic melts and related fluids (e.g., Cuney et al 2002;Harlaux et al 2017;Linnen et al 2012).…”

Section: Fluorine Partitioning Model Between An Anatectic Melt Micace...mentioning

confidence: 63%

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Fluorine behavior during experimental muscovite dehydration melting and natural partitioning between micas: Implications for the petrogenesis of peraluminous leucogranites and pegmatites

Sallet

Price

Ribeiro

et al. 2023

American Mineralogist

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Fluorine behavior during the partial melting of two-mica bearing protoliths have been experimentally investigated at 700 to 930 °C and 0.4 and 0.6 GPa. Muscovite dehydration and H2O-HF fluid assisted partial melting experiments were carried out using both a natural and synthetic two-mica schist made of natural micas. The mineral composition of the experiments was assessed by BSE imaging and EDS analyses. The F, Cl and major elements contents of the glass and micas were determined by EPMA.The muscovite dehydration melting reaction is muscovite + quartz + plagioclase = peraluminous melt + biotite + sillimanite + potassic feldspar ± hercynite. The starting biotite stays largely stable showing only minor melt + ilmenite and trace magnetite formation in the cleavages. The neo-formed biotite shows similar F contents and a slightly higher XSid component when compared to the starting biotite. HF-added experiments yield F-rich neoformed biotite.The obtained melts consisted of a peraluminous leucogranite with F contents increasing with F-rich protoliths. The bulk partition coefficient DF schist/melt increases from 0.5 to 3.0 when the F content of the protolith rises from 0.05 to 1.2 wt%. The partition coefficient, KdF Bt/melt , increases from 2.0 to 6.0 where the biotite MgO content increases from 5 to 18 wt%.The natural partition coefficient KdF Bt/Ms , measured for a set of rocks with a varied lithology from the Seridó Belt, NE, Brazil, was 2.7 ± 0.5.The obtained F partition coefficients, along with published F partition coefficients, between biotite and melt, biotite and muscovite, and fluid and melt, allow for the modeling of F behavior during muscovite dehydration and fluid-present melting. F-rich, two-mica protoliths will increase F partitioning in favor of the micaceous anatectic residue compared This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America.The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

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Section: Mica Compositionsupporting

confidence: 88%

Section: Fluorine Partitioning Model Between An Anatectic Melt Micace...mentioning

confidence: 63%

Fluorine behavior during experimental muscovite dehydration melting and natural partitioning between micas: Implications for the petrogenesis of peraluminous leucogranites and pegmatites

Sallet

Price

Ribeiro

et al. 2023

American Mineralogist

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“…The melt TiO 2 activity can vary between different granitic melts and at different stages of melt differentiation (e.g., between 0.1 and 0.6; Schiller and Finger 2019) and can, therefore, influence calculated Ti-in-zircon temperatures. Lower Ti activity in the melt could be the result of stabilising amphibole and/ or biotite (in which Ti is compatible; e.g., Nandedkar et al 2016;Azadbakht et al 2020) as earlier and more abundant crystallising phases in the inferred higher water content melts after ~ 60 Ma. Therefore, these estimated temperatures should be treated with caution, and the origin of the marked decrease in zircon Ti concentrations at ~ 60 Ma could be related to temperature, a change in the TiO 2 activity of the melt or other unknown factors.…”

Section: The Zircon Record Of the Evolving Yarabamba Batholith And Quellaveco Porphyry Systemmentioning

confidence: 99%

From long-lived batholith construction to giant porphyry copper deposit formation: petrological and zircon chemical evolution of the Quellaveco District, Southern Peru

Nathwani

Simmons

Large

et al. 2021

Contrib Mineral Petrol

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Porphyry Cu ore deposits are a rare product of arc magmatism that often form spatiotemporal clusters in magmatic arcs. The petrogenetic evolution of igneous rocks that cover the temporal window prior to and during porphyry Cu deposit formation may provide critical insights into magmatic processes that are key in generating these systems. This study documents the magmatic evolution of the Palaeocene–Eocene Yarabamba Batholith, Southern Peru, that was incrementally assembled between ~ 67 and ~ 59 Ma and hosts three, nearly contemporaneous, giant porphyry Cu–Mo deposits that formed at 57–54 Ma (Quellaveco, Toquepala and Cuajone). Whole-rock geochemistry, U–Pb geochronology and zircon trace element chemistry are reported from Yarabamba rocks that span the duration of plutonic activity, and from six porphyry intrusions at Quellaveco that bracket mineralisation. A change in whole-rock chemistry in Yarabamba intrusive rocks to high Sr/Y, high La/Yb and high Eu/Eu* is observed at ~ 60 Ma which is broadly coincident with a change in vector of the converging Nazca plate and the onset of regional compression and crustal thickening during the first stage of the Incaic orogeny. The geochemical changes are interpreted to reflect a deepening of the locus of lower crustal magma evolution in which amphibole ± garnet are stabilised as early and abundant fractionating phases and plagioclase is suppressed. Zircons in these rocks show a marked change towards higher Eu/Eu* (> 0.3) and lower Ti (< 9 ppm) compositions after ~ 60 Ma. Numerical modelling of melt Eu systematics and zircon-melt partitioning indicates that the time series of zircon Eu/Eu* in these rocks can be explained by a transition from shallower, plagioclase-dominated fractionation to high-pressure amphibole-dominated fractionation at deep crustal levels from ~ 60 Ma. Our modelling suggests that any redox effects on zircon Eu/Eu* are subordinate compared to changes in melt composition controlled by the fractionating mineral assemblage. We suggest that growth and intermittent recharge of the lower crustal magma reservoir from ~ 60 Ma produced a significant volume of hydrous and metallogenically fertile residual melt which ascended to the upper crust and eventually generated the three giant porphyry Cu–Mo deposits at Quellaveco, Toquepala and Cuajone from ~ 57 Ma. Our study highlights the importance of high-pressure magma differentiation fostered by strongly compressive tectonic regimes in generating world-class porphyry Cu deposits.

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“…Kondisi tektonik pembentukan batuan dapat diklasifikasikan melalui rasio beberapa konsentrasi unsur jejak, unsur tanah jarang (UTJ), maupun isotop [5][6][7]. Mineralisasi logam tertentu juga sering terjadi pada batuan dengan karakter spesifik, seperti Ni-Co cenderung pada batuan rendah SiO 2 (ultra mafik-mafik) dan Sn-W pada batuan tinggi SiO 2 (felsik) dapat dijelaskan berdasarkan kecenderungan karakter geokimia seperti terdapat pada penelitian terdahulu [8][9][10][11]. Tipikal batuan yang terdapat pada sekitar aliran sungai dapat ditelusuri dengan studi geokimia sedimen aliran [12,13].…”

Section: Pendahuluanunclassified

Komparasi Geokimia Batuan Gunung Api Kuarter dan Tersier di Tepian Selatan Lampung

Irzon

2020

EKSPLORIUM

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ABSTRAK Keterdapatan batuan gunung api di Sumatra diakibatkan oleh penunjaman Lempeng Samudra India-Australia ke bawah Lempeng West Sumatra sejak Eosen. Tanggamus adalah kabupaten di ujung selatan Lampung dengan keterdapatan beberapa unit batuan gunung api berumur Tersier maupun Kuarter. Studi ini bertujuan untuk membandingkan komposisi geokimia batuan gunung api Tersier Formasi Hulusimpang dengan batuan gunung api Kuarter Gunung Tanggamus. Perangkat XRF dan ICP-MS dimanfaatkan untuk mengetahui kadar oksida utama, unsur jejak, dan unsur tanah jarang pada penelitian ini. Berdasarkan karakter geokimia, sampel dari Formasi Hulusimpang adalah batuan gunung api kalk-alkali, metalumina hingga peralumina, dan dalam rentang trakiandesit basaltik hingga riolit. Sampel batuan gunung api berumur Kuarter berada pada rentang kadar silika yang lebih sempit dan cenderung metalumina. Studi ini membuktikan bahwa kedua kelompok batuan berasal dari magma yang sama, tetapi dengan kontaminasi kerak selama diferensiasi. Proses pembentukan yang berbeda pada kedua kelompok batuan diperjelas oleh derajat kemiringan kurva diagram laba-laba UTJ dan jenis anomali Eu.ABSTRACT The presence of volcanic rocks in Sumatra is due to the subduction of the Indian-Australian Ocean Plate under the West Sumatra Plate since the Eocene. Tanggamus Regency situated at the southern edge of Lampung with the occurrence of several Tertiary and Quaternary volcanic rock units. The aim of this study is to compare the geochemical composition of Tertiary volcanic rocks from the Hulusimpang Formation and Quaternary volcanic rocks from Mount Tanggamus in the Tanggamus Regency. XRF and ICP-MS devices were used to determine the compositions of major oxides, trace elements, and rare earth elements in this study. Based on geochemical characters, samples from the Hulusimpang Formation are calc-alkaline volcanic rocks, metaluminous to peraluminous, and in the basaltic trachyandesite to rhyolite ranges. Quaternary samples are in a narrower range of silica content and tend to be metaluminous. This study proves that the two rock groups originate from the same magma but with crustal contamination during differentiation. The two volcanic should experience through different formation processes based on the slope of the heavy-REE and the type of Eu anomaly.

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Using magmatic biotite chemistry to differentiate barren and mineralized Silurian–Devonian granitoids of New Brunswick, Canada

Cited by 39 publications

References 91 publications

Fluorine behavior during experimental muscovite dehydration melting and natural partitioning between micas: Implications for the petrogenesis of peraluminous leucogranites and pegmatites

Fluorine behavior during experimental muscovite dehydration melting and natural partitioning between micas: Implications for the petrogenesis of peraluminous leucogranites and pegmatites

From long-lived batholith construction to giant porphyry copper deposit formation: petrological and zircon chemical evolution of the Quellaveco District, Southern Peru

Komparasi Geokimia Batuan Gunung Api Kuarter dan Tersier di Tepian Selatan Lampung

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