Zircon, corundum and garnet megacrysts, occurring in Tertiary olivine tholeiites with porphyric texture and vesicular or amgydaloidal structures that are usually filled with calcite, chlorite or analcime. The rocks also contain lherzolite and websterite xenoliths.
Ref.:
- Zhang, H.P., Li, F.T., and Li, J. (2001): Research on gem-quality zircon from Changle, Shandong Province. Journal of Gems and Gemology 3(4), 30-32.
- Qiu Zhili, Wu Fuyuan, Yu Qingyuan, Xie Liewen, and Yang Shufeng (2005): Hf isotopes of zircon megacrysts from the Cenozoic basalts in eastern China. Chinese Science Bulletin 50(22), 2602-2611.
