High pressure and HP-HT behaviour of lizardite and chlorite

Layered minerals such as lizardite and chlorite are believed to be possible water-carrier in the deep Earth crust. However, the high-pressure behaviour of layered minerals is still poorly constrained. This is due to several factors, including the layered nature of these minerals that often result in the acquisition of low-quality single crystal data. Because of that, we selected several single crystal of both specimens, collected from renowned outcrops. The main target of this proposal is to investigate the structure evolution and the high-pressure behaviour of lizardite and chlorite in order to better constrain their PT stability range.

诸如利蛇纹石（lizardite）与绿泥石（chlorite）等层状矿物，被认为是地球深部地壳中潜在的含水载体。然而，目前学界对这类层状矿物的高压行为的约束仍较为有限。造成这一现状的因素包含多个方面：这类矿物的层状结构特性往往会导致获取的单晶数据质量不佳。为此，我们从知名露头采集的两类标本中挑选了若干单晶。本研究的核心目标为探究利蛇纹石与绿泥石的结构演化及高压行为，以期更精准地限定其压力-温度（PT）稳定区间。