The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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AAPG Bulletin; Year: 2025; Issue: April DOI: 10.1306/03182524012
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Figure 3. Fracture and dissolution features observed in the core from well A. (A) Vuggy fracture (Vf) cutting the shrubstone host rock with alteration halo. Most primary pores of the host rock are filled with grayish quartz. Host rock is commonly observed with vuggy aspect. (B) The Vf crossing the core. Vugs are coated with up to 1-mm-sized euhedral quartz crystals. (C) The vuggy fractures filled with yellowish quartz (Yqtz) and shrubstone host rock cemented with grayish quartz (Gqtz). Sparse vugs or geodes filled by quartz crystals are observed in the host rock. (D) The vuggy fractures with centimeter-sized aperture coated by euhedral quartz. (E) Narrow small displacement fault (Sf) swarm, with cataclastic fill. (F) Silica layer bearing bed-perpendicular opening-mode fractures. (G) Silicified spherulitestone host rock and open Vf with euhedral quartz. This fracture is associated with centimeter-sized quartz geodes (Qtzg).
Figure 3. Fracture and dissolution features observed in the core from well A. (A) Vuggy fracture (Vf) cutting the shrubstone host rock with alteration halo. Most primary pores of the host rock are filled with grayish quartz. Host rock is commonly observed with vuggy aspect. (B) The Vf crossing the core. Vugs are coated with up to 1-mm-sized euhedral quartz crystals. (C) The vuggy fractures filled with yellowish quartz (Yqtz) and shrubstone host rock cemented with grayish quartz (Gqtz). Sparse vugs or geodes filled by quartz crystals are observed in the host rock. (D) The vuggy fractures with centimeter-sized aperture coated by euhedral quartz. (E) Narrow small displacement fault (Sf) swarm, with cataclastic fill. (F) Silica layer bearing bed-perpendicular opening-mode fractures. (G) Silicified spherulitestone host rock and open Vf with euhedral quartz. This fracture is associated with centimeter-sized quartz geodes (Qtzg).