کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4734059 | 1357069 | 2006 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Vein deflections and thickness variations of epithermal quartz veins as indicators of fracture coalescence Vein deflections and thickness variations of epithermal quartz veins as indicators of fracture coalescence](/preview/png/4734059.png)
Epithermal quartz veins at the Broken Hills gold deposit, New Zealand, strike N-S and dip steeply westward. Small changes in the orientations of the three main lodes and associated mesoscopic veins define deflection lines that rake steeply in the vein plane. A method of constructing the opening vector from the three-dimensional geometry of a vein deflection is presented. The resulting vectors plunge steeply and are at low angles to the main veins and the deflection lines, indicating a large component of normal dip-slip shear during the opening of these veins. Vein thickness distributions are power-law, with similar fractal dimensions to previously reported values for non-stratabound vein arrays. The vein system at Broken Hills developed by linking of isolated extension-dominated shear veins with shear-dominated veins, generating sub-vertical and sub-horizontal fluid flow pathways.
Journal: Journal of Structural Geology - Volume 28, Issue 8, August 2006, Pages 1396–1405