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 7. Fracture, fault, and collapse breccia features from well B. (A) Brecciated laminite host rock (BrLam). The collapse breccia is cemented with calcite (Brcem) and the laminite is silicified in some parts (SiLam). In the detail (inset), breccia clasts have radiaxial-fibrous calcite rims (Srim) and are deposited on the bottom of an irregular cavity. Collapse breccia pore is filled with a stratified infill material (Inf) on the bottom as a geopetal indicator and is cemented with grayish quartz (Gqtz). (B) Calcite vein with radiaxial-fibrous calcite rims and filled with fine Inf locked on the irregularities of the wall toward the bottom as a geopetal feature. (C) Fault plane cuts previously BrLam with radiaxial-fibrous calcite rims and showing oblique downdip striations. (D) The Gqtz and barite (Bar) veins cut brecciated spherulitestone (BrSph). (E) Barite geode (Barg) in a vuggy pore associated with quartz veins. Barite was deposited after Gqtz. (F) Early Srim deposited around a clast of BrSph. Strat. = stratigraphic.
Figure 7. Fracture, fault, and collapse breccia features from well B. (A) Brecciated laminite host rock (BrLam). The collapse breccia is cemented with calcite (Brcem) and the laminite is silicified in some parts (SiLam). In the detail (inset), breccia clasts have radiaxial-fibrous calcite rims (Srim) and are deposited on the bottom of an irregular cavity. Collapse breccia pore is filled with a stratified infill material (Inf) on the bottom as a geopetal indicator and is cemented with grayish quartz (Gqtz). (B) Calcite vein with radiaxial-fibrous calcite rims and filled with fine Inf locked on the irregularities of the wall toward the bottom as a geopetal feature. (C) Fault plane cuts previously BrLam with radiaxial-fibrous calcite rims and showing oblique downdip striations. (D) The Gqtz and barite (Bar) veins cut brecciated spherulitestone (BrSph). (E) Barite geode (Barg) in a vuggy pore associated with quartz veins. Barite was deposited after Gqtz. (F) Early Srim deposited around a clast of BrSph. Strat. = stratigraphic.