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Published March 2011 | public
Journal Article

Geochemistry and origin of tektites from Guilin of Guangxi, Guangdong and Hainan

Abstract

Six tektites from Guilin of Guangxi, Hainan, and Guangdong were analyzed for the abundances of major elements and 27 trace elements. All samples are splash-form tektites and have SiO_2 contents ranging from 73.1wt% to 76.0wt% (74.6wt% on average). The chemical compositions, except Cr and Ni, of tektites from different areas, are similar. Guangdong tektite shows enrichments of Ni and Cr contents by a factor of 3, and has slightly higher MgO and FeO than Hainan and Guilin tektites. It indicates that the tektites were formed by mixing several target rocks. The major and trace element concentrations of southern China tektites closely resemble previously reported data for average splash-form and Muong Nong-type indochinites, indicating that they have the same source. (La/Lu)_CI (7.99), Zr/Hf (35.45 on average), Ba/Rb (3.59 on average), and the rare earth element (REE) contents of tektites are similar to those of typical post Archean upper crustal rocks. This study suggests that the best fit for the target source of southern China tektites could be a combination of 41% shale, 2% sandstone, 20% greywacke, and 37% quartzite.

Additional Information

© 2011 Science China Press and Springer-Verlag Berlin Heidelberg. Received October 20, 2009; accepted May 10, 2010. We thank Wang Sichao and Zhang Aicheng for their constructive reviews, and Hu Changming and Li Ruqi for the samples used in this study. This work was supported by National Natural Science Foundation of China (Grant Nos. 40773046 and 10621303) and Minor Planet Foundation of China.

Additional details

Created:
August 19, 2023
Modified:
October 23, 2023