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- W2267345727 endingPage "231" @default.
- W2267345727 startingPage "219" @default.
- W2267345727 abstract "A suite of 18 zircon gemstones from placers in the Highland/Southwestern Complex, Sri Lanka, were subjected to a comprehensive study of their radiation damages and ages. The investigation included X-ray diffraction, Raman and PL spectroscopy, electron microprobe, PIXE and HRTEM analysis, as well as (U-Th)/He and SHRIMP U-Th-Pb age determinations. Zircon samples described in this study are virtually homogeneous. They cover the range from slightly metamict to nearly amorphous. Generally concordant U-Th-Pb ages averaging 555 ± 11 Ma were obtained. Late Ordovician zircon (U-Th)/He ages scattering around 443 ± 9 Ma correspond reasonably well with previously determined biotite Rb-Sr ages for rocks from the HSWC. Slightly to moderately metamict zircon has retained the radiogenic He whereas only strongly radiation-damaged zircon (calculated total fluences exceeding ~3.5 × 1018 α-events/g) has experienced significant He loss. When compared to unannealed zircon from other localities, Sri Lanka zircon is about half as metamict as would correspond to complete damage accumulation over a ~555 m.y. lasting self-irradiation period, suggesting significant annealing of the structural radiation damage. Insufficient consideration of this has often resulted in significant underestimation of radiation effects in zircon. We suggest to estimate “effective α-doses” for Sri Lanka zircon by multiplying total α-fluences, which were calculated using the zircon U-Th-Pb age, by a correction factor of 0.55. This conversion may be applied to literature data as well, because all gem-zircon samples from Sri Lanka (this work and previous studies) seem to reveal the same general trends of property changes depending on the radiation damage. The use of “effective α-doses” for Sri Lanka zircon contributes to more reliable quantitative estimates of radiation effects and makes possible direct comparison between natural and synthetic radiation-damaged zircon." @default.
- W2267345727 created "2016-06-24" @default.
- W2267345727 creator A5018560948 @default.
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- W2267345727 date "2004-01-01" @default.
- W2267345727 modified "2023-10-11" @default.
- W2267345727 title "Incomplete retention of radiation damage in zircon from Sri Lanka" @default.
- W2267345727 cites W1517752641 @default.
- W2267345727 cites W1551533369 @default.
- W2267345727 cites W1839775070 @default.
- W2267345727 cites W1869545340 @default.
- W2267345727 cites W1929625011 @default.
- W2267345727 cites W1962055747 @default.
- W2267345727 cites W1967635228 @default.
- W2267345727 cites W1967936265 @default.
- W2267345727 cites W1976880424 @default.
- W2267345727 cites W1977834367 @default.
- W2267345727 cites W1979442888 @default.
- W2267345727 cites W1979761517 @default.
- W2267345727 cites W1986135986 @default.
- W2267345727 cites W1986925496 @default.
- W2267345727 cites W1987873006 @default.
- W2267345727 cites W1989515611 @default.
- W2267345727 cites W1990801785 @default.
- W2267345727 cites W1991605575 @default.
- W2267345727 cites W1991608935 @default.
- W2267345727 cites W1991695151 @default.
- W2267345727 cites W1992105013 @default.
- W2267345727 cites W1993478031 @default.
- W2267345727 cites W1997418022 @default.
- W2267345727 cites W1999750072 @default.
- W2267345727 cites W2003690079 @default.
- W2267345727 cites W2007105153 @default.
- W2267345727 cites W2009232200 @default.
- W2267345727 cites W2012636347 @default.
- W2267345727 cites W2015773684 @default.
- W2267345727 cites W2016525143 @default.
- W2267345727 cites W2016886664 @default.
- W2267345727 cites W2020518184 @default.
- W2267345727 cites W2022716705 @default.
- W2267345727 cites W2022737532 @default.
- W2267345727 cites W2027065363 @default.
- W2267345727 cites W2027205703 @default.
- W2267345727 cites W2027483837 @default.
- W2267345727 cites W2028134354 @default.
- W2267345727 cites W2028455433 @default.
- W2267345727 cites W2031932530 @default.
- W2267345727 cites W2042318174 @default.
- W2267345727 cites W2042754000 @default.
- W2267345727 cites W2043081750 @default.
- W2267345727 cites W2044636359 @default.
- W2267345727 cites W2055517641 @default.
- W2267345727 cites W2055649050 @default.
- W2267345727 cites W2057001039 @default.
- W2267345727 cites W2057208829 @default.
- W2267345727 cites W2060434498 @default.
- W2267345727 cites W2063495033 @default.
- W2267345727 cites W2066123425 @default.
- W2267345727 cites W2069921338 @default.
- W2267345727 cites W2072005202 @default.
- W2267345727 cites W2075618823 @default.
- W2267345727 cites W2081828468 @default.
- W2267345727 cites W2081936006 @default.
- W2267345727 cites W2082242071 @default.
- W2267345727 cites W2082925767 @default.
- W2267345727 cites W2089522169 @default.
- W2267345727 cites W2095043082 @default.
- W2267345727 cites W2096494331 @default.
- W2267345727 cites W2096502698 @default.
- W2267345727 cites W2096773693 @default.
- W2267345727 cites W2128394018 @default.
- W2267345727 cites W2131086705 @default.
- W2267345727 cites W2143403257 @default.
- W2267345727 cites W2143771318 @default.
- W2267345727 cites W2145754707 @default.
- W2267345727 cites W2161248155 @default.
- W2267345727 cites W2296521652 @default.
- W2267345727 cites W2303928679 @default.
- W2267345727 cites W2314327123 @default.
- W2267345727 cites W2316459754 @default.
- W2267345727 cites W2320017896 @default.
- W2267345727 cites W2325963710 @default.
- W2267345727 cites W2342640905 @default.
- W2267345727 cites W2461647798 @default.
- W2267345727 cites W2521267078 @default.
- W2267345727 cites W2594613549 @default.
- W2267345727 cites W2745439187 @default.
- W2267345727 cites W2909223431 @default.
- W2267345727 cites W2945742237 @default.
- W2267345727 cites W2970483923 @default.
- W2267345727 cites W2991404140 @default.
- W2267345727 doi "https://doi.org/10.2138/am-2004-0126" @default.
- W2267345727 hasPublicationYear "2004" @default.