Atlas of Zircon Textures

Corfú, Fernando; Hanchar, John M.; Hoskin, Paul W. O.; Kinny, Peter D.

doi:10.2113/0530469

Cited by 2,806 publications

(1,567 citation statements)

References 118 publications

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“…They have a small abundance range of 162-1,273 ppm for U and 91-480 ppm for Th. The Th/U ratio has a value of 0.27-0.80, indicating typical magmatic origin (Rubatto, 2002;Corfu et al, 2003). The 206 Pb/ 238 U weighted mean age is 151.8 ± 1.4 Ma (n = 17, MSWD=0.63; Fig.…”

Section: Zircon U-pb Agesmentioning

confidence: 93%

“…5. In the images, most of the zircons are transparent, euhedral and prismatic, and have an oscillatory zoning or linear zoning, diagnostic of magmatic origin (Corfu et al, 2003). They are generally colorless or light brown and 80-270 μm long, with a length/width ratio of 1.1-2.6.…”

Section: Zircon U-pb Agesmentioning

confidence: 99%

“…6a). These spots have a variable abundance of U, 390-5,303 ppm and Th, 103-4,286 ppm, with a Th/U ratio of 0.11-1.84, typical of magmatic zircons (Rubatto, 2002;Corfu et al, 2003). After common lead correction, 207 Pb/ 206 Pb ages can be used for zircons which are N1.0 Ga in ages, and 206 Pb/ 238 U ages can be used for younger zircons (Andersen, 2002).…”

Section: Zircon U-pb Agesmentioning

confidence: 99%

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Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Liang

Dong

Jiang

et al. 2016

Ore Geology Reviews

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The Xitian tungsten-tin (W-Sn) polymetallic deposit, located in eastern Hunan Province, South China, is a recently explored region containing one of the largest W-Sn deposits in the Nanling W-Sn metallogenic province. The mineral zones in this deposit comprise skarn, greisen, structurally altered rock and quartz-vein types. The deposit is mainly hosted by Devonian dolomitic limestone at the contact with the Xitian granite complex. The Xitian granite complex consists of Indosinian (Late Triassic, and Yanshanian (Late Jurassic-Early Cretaceous, 165-141 Ma) granites. Zircons from two samples of the Xitian granite dated using laser ablationinductively coupled mass spectrometer (LA-ICPMS) U-Pb analysis yielded two ages of 225.6 ± 1.3 Ma and 151.8±1.4 Ma, representing the emplacement ages of two episodic intrusions of the Xitian granite complex. Molybdenites separated from ore-bearing quartz-veins yielded a Re-Os isochron age of 149.7±0.9 Ma, in excellent agreement with a weighted mean age of 150.3±0.5 Ma. Two samples of muscovites from ore-bearing greisens yielded 40 Ar/ 39 Ar plateau ages of 149.5±1.5 Ma and 149.4±1.5 Ma, respectively. These isotopic ages obtained from hydrothermal minerals are slightly younger than the zircon U-Pb age of 151.8±1.4 Ma of the Yanshanian granite in the Xitian area, indicating that the W-Sn mineralization is genetically related to the Late Jurassic magmatism. The Xitian deposit is a good example of the Early Yanshanian regional W-Sn ore-forming event (160-150 Ma) in the Nanling region. The relatively high Re contents (8.7 to 44.0 ppm, average of 30.5 ppm) in molybdenites suggest a mixture of mantle and crustal sources in the genesis of the ore-forming fluids and melts. Based upon previous geochemical studies of Early Yanshanian granite and regional geology, we argue that the Xitian W-Sn polymetallic deposit can be attributed to back-arc lithosphere extension in the region, which was probably triggered by the break-off of the flat-slab of the Palae-Pacific plate beneath the lithosphere.

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Section: Zircon U-pb Agesmentioning

confidence: 93%

Section: Zircon U-pb Agesmentioning

confidence: 99%

Section: Zircon U-pb Agesmentioning

confidence: 99%

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Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Liang

Dong

Jiang

et al. 2016

Ore Geology Reviews

View full text Add to dashboard Cite

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“…Single zircon grains can record different geological processes that can be dated by means of an ion microprobe, with the aid of cathodoluminescence (CL) images to recognize different growth zones (Vavra et al, 1996;Kempe et al, 2000;Rubatto and Gebauer, 2000;Corfu et al, 2003). However, traditional CL-assisted dating is insufficient in the correct linkage between geochronological data and geological processes in complex zircons from such active areas.…”

mentioning

confidence: 99%

REE-assisted U–Pb zircon age (SHRIMP) of an anatectic granodiorite: Constraints on the evolution of the A Silva granodiorite, Iberian allochthonous complexes

Castiñeiras

García

Barreiro

2010

Lithos

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“…These grains show low length-to-width ratios from 2:1 to 14:1 (with the average of 5:1), which are characteristics for deep-seated and slowly cooled intrusions (Corfu et al 2003). Such morphological features suggest that zircon grains selected for the analysis are magmatic.…”

Section: Zircon Morphology and U-pb Resultsmentioning

confidence: 96%

Zircon U-Pb geochronology, Sm-Nd and Pb-Pb isotope systematics of Ediacaran post-collisional high-silica Acampamento Velho volcanism at the Tupanci area, NW of the Sul-Rio-Grandense Shield, Brazil

et al. 2017

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ABSTRACT:We present new U-Pb zircon ages and Sm-Nd-Pb isotopic data for volcanic and hypabyssal acid rocks from the northernmost exposure of the Acampamento Velho Formation in the NW portion of the Sul-Rio-Grandense Shield, Brazil. The first volcanic episode, grouped in the high-Ti rhyolites from the Tupanci hill, shows age of 579 ± 5.6 Ma, which is in agreement with the post-collisional Acampamento Velho Formation volcanism in the Bom Jardim Group of the Camaquã Basin. A poorly constrained age of 558 +/-39 Ma was obtained for rhyolites from the low-Ti group at the Picados Hill, which may indicate a younger acid volcanism, or a greater time span for the volcanism of the Acampamento Velho Formation in southernmost Brazil. Regarding magmatic sources, Sm/Nd isotopic data coupled to Pb isotopes and a review of trace element geochemistry indicate different amounts of Paleoproterozoic (Dom Feliciano, Pinheiro Machado Suite) to Neoproterozoic (Rio Vacacaí terrane) lower crust melting. Our data, coupled with literature data, contribute to a better understanding of the stratigraphic evolution for the Neoproterozoic post-collisional volcanic successions of the Camaquã Basin in the Sul-Rio-Grandense Shield. KEYWORDS:Volcanism; Acampamento Velho Formation; Camaquã Basin; Tupanci; Geochronology. RESUMO: Novas idades obtidas por meio do método U-Pb em zircão e dados isotópicos Sm-Nd-Pb são apresentados para as rochas vulcânicas e hipabssais ácidas da exposição mais setentrional da Formação Acampamento

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Atlas of Zircon Textures

Cited by 2,806 publications

References 118 publications

Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

REE-assisted U–Pb zircon age (SHRIMP) of an anatectic granodiorite: Constraints on the evolution of the A Silva granodiorite, Iberian allochthonous complexes

Zircon U-Pb geochronology, Sm-Nd and Pb-Pb isotope systematics of Ediacaran post-collisional high-silica Acampamento Velho volcanism at the Tupanci area, NW of the Sul-Rio-Grandense Shield, Brazil

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