Discovery and occurrence of high-pressure metapelitic rocks from Altun Mountain Areas, Xinjiang Autonomous Region

The Altun tectonic zone is an important left-handed strike-slip fault zone on the Asian continent. Recent studies reveal that the left-handed strike slip of this fault zone was developed not only in the Cenozoic, but also during the Late Ordovician. The fault zone is mainly composed of Proterozoic schists, volcanics, quartzites and carbonate rocks bearing stromatolites. The overlying strata are dominated by plateform carbonate rocks and

高压超高压变泥质岩适用的地质温压计评述

高压超高压变泥质岩形成温压条件及p-T演化轨迹是高压超高压变质作用研究的重要内容。本文介绍了高压超高压变泥质岩适用的几种地质温压计,包括石榴子石-多硅白云母Fe^(2+)-Mg交换温度计、石榴子石-绿泥石Fe^(2+)-Mg交换温度计、硬绿泥石-绿泥石Fe^(2+)-Mg交换温度计、多硅白云母Si含量压力计、金红石Zr含量温度计、榍石Zr含量温压计、锆石Ti含量温度计、石英Ti含量温度计以及氧同位素温度计,并对上述温压计的适用条件及使用时的注意事项做了简要评述。