Microfissural mapping of natural cracks in rocks: Implications for fluid transfers quantification in the crust
Microfissural mapping of natural cracks in rocks: Implications for fluid transfers quantification in the crust
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DOI：
10.1016/j.chemgeo.2005.05.009
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发表时间：
2005-11
期刊：
影响因子：
3.9
通讯作者：
M. Lespinasse;L. Désindes;P. Fratczak;V. Petrov
中科院分区：
文献类型：
--
作者：
M. Lespinasse;L. Désindes;P. Fratczak;V. Petrov
流体在地壳中的运移在很大程度上取决于围岩的输运性质。古流体流动的定量化对于更好地理解上地壳中元素（Au、U.）的迁移和蚀变随时间的变化具有重要意义。本文提出了一种利用流体包裹体面等构造特征定量古流体流动的方法。该方法（AnIma）允许切片上F.I.P（长度和方向）几何参数的数字化和岩石基质裂隙孔隙度和渗透率的量化。一个西伯利亚花岗岩的例子。在这项研究中，3241裂纹数字化。F.I.P在整个剖面中都存在，并对其裂隙孔隙度（5.5%）和裂隙渗透率（5.47 mD或5.47 10− 15 m2）进行了量化。AnIma方法的使用允许在空间和时间上快速量化不同的化石流体路径。
Fluid migrations in the crust strongly depend on the transport properties of surrounding rocks. Quantification of paleofluid flow is of great importance in developing a better understanding of element transfers in the upper crust (Au, U …) and alteration propagation as a function of time. This paper presents a method which has the ability to quantify paleofluid flows by using structural features such as Fluid Inclusion Planes (F.I.P). The method (AnIma) permits the digitization of geometrical parameters of F.I.P (length and orientation) on sections and quantification of fissural porosities and permeabilities of the rock matrix. An example from a Siberian granite is presented. In this study 3241 cracks were digitized. The F.I.P are present throughout the section and their fissural porosities (5.5%) and fissural permeabilities (5.47 mD or 5.47 10−15m2) were quantified. The use of the AnIma method permits a rapid quantification of the different fossil fluid pathways in space and time.