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Volume 40 Issue 1
Feb.  2021
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ZHANG Hongmin, ZHAO Xueqin, WANG Fudong, WU Changda, LI Song. Radioactivity of Nuorilang waterfall travertine dam in Jiuzhaigou valley, Sichuan Province and its implication for the sedimentary environment[J]. CARSOLOGICA SINICA, 2021, 40(1): 157-165. doi: 10.11932/karst20210117
Citation: ZHANG Hongmin, ZHAO Xueqin, WANG Fudong, WU Changda, LI Song. Radioactivity of Nuorilang waterfall travertine dam in Jiuzhaigou valley, Sichuan Province and its implication for the sedimentary environment[J]. CARSOLOGICA SINICA, 2021, 40(1): 157-165. doi: 10.11932/karst20210117

Radioactivity of Nuorilang waterfall travertine dam in Jiuzhaigou valley, Sichuan Province and its implication for the sedimentary environment

doi: 10.11932/karst20210117
  • Publish Date: 2021-02-25
  • Travertine is a good carrier for the study of paleo-climate and paleo-environment. A portable hand-held gamma meter was used to measure the radioactivity in the Nuorilang waterfall travertine dam in Jiuzhaigou valley. Combined with the analysis of the major and trace elements in the travertine samples,the environment of the dam was studied. Results show that the gamma radiation on the surface of the dam averages 27.57 Ur and the variation coefficient is 18.73%. The travertine color is associated with color elements contained and minerals. (La/Yb) N of dam travertine is between 8.57-14.93, 11.78 on average, with a feature of light rare element enrichment. Analysis suggests that the color of dam travertine resulted from multiple factors, including the content of trace elements,climate change,precipitation,and the types and growth of aquatic plants. There is a positive correlation between the content of radioactive elements, travertine color and gamma values. Thus the gamma value can be used to infer the deposition environment of travertine, i.e. the higher the gamma value, the moister the environment is.

     

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