Yung-Tan Lee and Ren-Yi Huang and Jyh-Yi Shih and Meng-Lung Lin and Yen-Tsui Hu and Hsiao-Ling Yu and
Chih-Cheng Chen
Geochemistry of Tektites from Maoming of Guandong Province, China
598 - 603
2011
5
10
International Journal of Geological and Environmental Engineering
https://publications.waset.org/pdf/10025
https://publications.waset.org/vol/58
World Academy of Science, Engineering and Technology
We measured the major and trace element contents
and RbSr isotopic compositions of 12 tektites from the Maoming
area, Guandong province (south China). All the samples studied are
splashform tektites which show pitted or grooved surfaces with
schlieren structures on some surfaces. The trace element ratios BaRb
(avg. 4.33), ThSm (avg. 2.31), SmSc (avg. 0.44), ThSc (avg. 1.01) ,
LaSc (avg. 2.86), ThU (avg. 7.47), ZrHf (avg. 46.01) and the rare
earth elements (REE) contents of tektites of this study are similar to the
average upper continental crust. From the chemical composition, it is
suggested that tektites in this study are derived from similar parental
terrestrial sedimentary deposit which may be related to postArchean
upper crustal rocks. The tektites from the Maoming area have high
positive εSr(0) valuesranging from 176.9190.5 which indicate that
the parental material for these tektites have similar Sr isotopic
compositions to old terrestrial sedimentary rocks and they were not
dominantly derived from recent young sediments (such as soil or
loess). The Sr isotopic data obtained by the present study support the
conclusion proposed by Blum et al. (1992)1 that the depositional age
of sedimentary target materials is close to 170Ma (Jurassic). Mixing
calculations based on the model proposed by Ho and Chen (1996)2
for various amounts and combinations of target rocks indicate that the
best fit for tektites from the Maoming area is a mixture of 40 shale,
30 greywacke, 30 quartzite.
Open Science Index 58, 2011