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首页> 外文期刊>Contributions to Mineralogy and Petrology >Modification of fluid inclusions in quartz by deviatoric stress. III: Influence of principal stresses on inclusion density and orientation
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Modification of fluid inclusions in quartz by deviatoric stress. III: Influence of principal stresses on inclusion density and orientation

机译：偏应力对石英中流体包裹体的改性。 III：主应力对夹杂物密度和取向的影响

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摘要

Extraction of useful geochemical, petrologic and structural information from deformed fluid inclusions is still a challenge in rocks displaying moderate plastic strain. In order to better understand the inclusion modifications induced by deviatoric stresses, six deformation experiments were performed with a Griggs piston-cylinder apparatus. Natural NaCl-H_2O inclusions in an oriented quartz crystal were subjected to differential stresses of 250-470 MPa at 700-900 °C and at 700-1,000 MPa confining pressure. Independently of the strain rate and of the crystallographic orientation of the quartz, the inclusions became dismembered and flattened within a crystallographic cleavage plane subperpendicular to ó_1. The neo-nate (newly formed) inclusions that result from dismemberment have densities that tend towards equilibrium with P_(fluid) = ó_1 at T_(shearing).
机译：在表现出中等塑性应变的岩石中，从变形流体包裹体中提取有用的地球化学，岩石学和结构信息仍然是一个挑战。为了更好地理解由偏应力引起的夹杂物变质，使用Griggs活塞缸装置进行了六个变形实验。取向石英晶体中的天然NaCl-H_2O夹杂物在700-900°C和700-1,000 MPa围压下承受250-470 MPa的压差。与应变速率和石英的晶体学取向无关，夹杂物在垂直于ó_1的晶体分裂平面内被分解和弄平。肢解产生的新生儿（新形成的）夹杂物的密度趋向于在T_（剪切）下P_（流体）=ó_1趋于平衡。

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