Issue 51

R. Basirat et alii, Frattura ed Integrità Strutturale, 51 (2020) 71-80; DOI: 10.3221/IGF-ESIS.51.06 78 also presented in this table. According to Fig. 7, the FN is similar for the two scales. There are two main types of joint set in both scales. Although the scattering of micro-fractures is more than the fractures collected at the field scale, the dip and dip direction are close to each other. Therefore, it can be stated that the geometry of the FN in Asmari Formation of Iran is similar at the studied scales. Figure 8: The number of micro-fractures of core samples for region 1 (the left diagram) and region 2 (the right diagram) Scale Joint Set Region 1 Region 2 Field scale First joint set 65/013 31/209 Second joint set 18/180 65/112 Core Sample scale First joint set 70/028 37/249 Second joint set 23/208 79/135 Difference (dip/dip direction) in degree First joint set 5/015 6/040 Second joint set 5/028 14/023 Table 2: Dip/Dip direction for two studied areas in two different scales C ONCLUSION n this paper, the conditions of the fracture network geometry of Asmari Formation were surveyed on a field scale and a core sample scale. Fractures were manually sampled from rocky outcrops on the field scale while micro-fractures were investigated using CT-scan images of core samples. In order to compare the fracture geometry, two related concepts of fractured media were used; i.e., fractal dimensions and orientation of fractures. The results indicated that the fractal dimension has the same value in both scales and the orientation of the fractures also is similar in both scales for Asmari Formation of Iran. Hence, it can be concluded that the fracture network has a similar geometry at different scales for the Asmari Formation of Iran. A CKNOWLEDGMENT uthors would like to sincerely thank Dr. Zhou, Dr. Zhao, and Dr. Lee for answering our emails and giving insightful comments. Special thanks also go to Mr. Khannazer and Mr. Mirkazemian as two Iranian expert geologists for giving valuable notes about Asmari formation of Iran. 0 1 2 3 4 5 6 7 8 9 A1 A2 A3 A4 A5 A6 No. of Fractures Sample 0 2 4 6 8 10 12 B1 B2 B3 B4 B5 B6 No. of Fractures Sample I A