Application of the microboudin method to palaeodifferential stress analysis of deformed impure marbles from Syros, Greece : Implications for grain-size and calcite-twin palaeopiezometers
Application of the microboudin method to palaeodifferential stress analysis of deformed impure marbles from Syros, Greece : Implications for grain-size and calcite-twin palaeopiezometers
复制标题
微布丁法在希腊锡罗斯岛变形不纯大理石古微分应力分析中的应用：对粒度和方解石孪生古压力计的影响
DOI：
10.1016/j.jsg.2010.11.002
复制
发表时间：
2011
影响因子：
3.1
通讯作者：
A.
中科院分区：
文献类型：
--
作者：
Masuda;T.;Miyake;T.;Kimura;N.;Okamoto;A.
在希腊锡罗斯蓝片岩相不纯大理石的方解石基质中发现了蓝闪石内发育的微石香肠构造。这些结构的存在，使成功的应用微石香肠方法古差异应力分析，这是最初开发的岩石与石英基质。微石香肠法的应用表明，差异应力在大理岩折返过程中增大，估计的最大古差异应力值约为9-15 MPa，比方解石双晶古压差计估计的值低一个数量级。这种差异反映了这两种方法在变形历史的不同阶段评估差异应力的事实。在锡罗斯样品中的差应力估计使用现有的三个公式粒度palaeopiezometry显示出高度的分散性，并没有可靠的结果之间的比较得到的微boudin方法和粒度palaeopiezometry的结果。
Microboudinage structures developed within glaucophane are found in the calcite matrix of blueschist-facies impure marbles from Syros, Greece. The presence of these structures enables the successful application of the microboudin method for palaeodifferential stress analysis, which was originally developed for rocks with a quartzose matrix. Application of the microboudin method reveals that differential stress increased during exhumation of the marble; the estimated maximum palaeodifferential stress values are approximately 9–15 MPa, an order of magnitude lower than the values estimated using the calcite-twin palaeopiezometer. This discrepancy reflects the fact that the two methods assess differential stress at different stages in the deformation history. Differential stresses in the Syros samples estimated using three existing equations for grain-size palaeopiezometry show a high degree of scatter, and no reliable results were obtained by a comparison between the results of the microboudin method and grain-size palaeopiezometry.