Abstract Details
(2020) U-Series Ages of Young Tengchong Volcanoes, Southeast Tibetan Plateau
Zou H, Guo Z, Peng Y, Schmitt A, Fan Q, Zhao Y & Ma M
https://doi.org/10.46427/gold2020.3234
05d: Room 2, Friday 26th June 22:03 - 22:06
Haibo Zou
View abstracts at 6 conferences in series
Zipei Guo View abstracts at 2 conferences in series
Yang Peng
Axel K. Schmitt View all 4 abstracts at Goldschmidt2020 View abstracts at 12 conferences in series
Qicheng Fan View abstracts at 9 conferences in series
Yongwei Zhao
Mingjia Ma
Zipei Guo View abstracts at 2 conferences in series
Yang Peng
Axel K. Schmitt View all 4 abstracts at Goldschmidt2020 View abstracts at 12 conferences in series
Qicheng Fan View abstracts at 9 conferences in series
Yongwei Zhao
Mingjia Ma
Listed below are questions that have been submitted by the community that the author will try and cover in their presentation. To submit a question, ensure you are signed in to the website. Authors or session conveners approve questions before they are displayed here.
Submitted by Lucy McGee on Thursday 25th June 07:39
Hi Haibo - nice to e-meet you and excited to see some U-Th-Ra data being presented. I have some questions about your U-series data. You have quite substantial Ra excesses in the whole rock data, but I noticed your WR data point on your zircon plots is on the equiline for U-Th. Do you have any idea why that might be? We saw the same thing in our dataset from Montserrat (U-Th in equilibrium but Ra excesses present). Also, I get that the blue model line on your Ra/Th vs Th/U plot is the maximum age based on the half life of Ra but I didn't quite get where the red model line was from. Thanks! Lucy
Hi Haibo - nice to e-meet you and excited to see some U-Th-Ra data being presented. I have some questions about your U-series data. You have quite substantial Ra excesses in the whole rock data, but I noticed your WR data point on your zircon plots is on the equiline for U-Th. Do you have any idea why that might be? We saw the same thing in our dataset from Montserrat (U-Th in equilibrium but Ra excesses present). Also, I get that the blue model line on your Ra/Th vs Th/U plot is the maximum age based on the half life of Ra but I didn't quite get where the red model line was from. Thanks! Lucy
Submitted by Haibo Zou on Friday 26th June 21:48
Thanks Lucy! Good questions. The whole rocks have 4 to 11% 230Th excesses. Because of the large range with zircon U-Th data and relatively small 230Th excesses, the whole rocks seem to plot on the equiline. The red line assumes initial (226Ra/230Th) ratio of 3.5. Hope that I answered your questions.
Thanks Lucy! Good questions. The whole rocks have 4 to 11% 230Th excesses. Because of the large range with zircon U-Th data and relatively small 230Th excesses, the whole rocks seem to plot on the equiline. The red line assumes initial (226Ra/230Th) ratio of 3.5. Hope that I answered your questions.
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