Li-Ta-rich topaz-lepidolite granite from Yichun (China) exhibits the highest 87Sr/86Sr ratios for Earth's rocks: Ages and petrogenesis

Key Points

• The highest 87Sr/86Sr ratios found indicate unique geological processes in topaz-lepidolite granite forms.
• Specifically, the granite exhibits ratios exceeding those of previously recorded Earth rocks, reaching significant levels.
• Petrogenesis explains how these unique granite forms develop over geological timescales in varied environments.
• Evidence suggests that understanding these rocks can provide insights into Earth's crustal evolution and mineral compositions.