Depositional and stratigraphic architecture of a mixed carbonate–siliciclastic depositional system in the Mississippian (Lower Carboniferous) of the Southern Midcontinent, Oklahoma, USA

Bynum, Jamar; Pashin, Jack C.; Wethington, Conn

doi:10.1007/s10347-022-00655-2

Cited by 5 publications

(2 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Adjoining the Huanghekou Sag, the Qingdong Sag, and the Miaoxi Sag, this sag extends to the Ludong Uplift in the east, the Weibei Uplift in the south, the Kendong Uplift in the west, and the Laibei Low Uplift in the north, with a total area of about 1780 km 2 [19,20]. The study area is located in the south of the Laizhou Bay Sag, with an area of about 920 km 2 . The sag mainly includes five secondary structural units: the eastern strike-slip zone, the northern depression, the central structural zone, the southern subdepression, and the southern gentle slope belt (Figure 1).…”

Section: Geological Conditions Of the Study Areamentioning

confidence: 99%

“…It is an important rock combination for global oil and gas exploration. At the same time, sequence research on different rocks developed in the same stratum has been a research hotspot in recent years [1,2]. The southern part of Laizhou Bay, located in the Laizhou Bay Sag in the southern Bohai Sea, is a typical continental rift lake basin [3] and is a symbiotic sedimentary area of volcanic rock, evaporite, and clastic rock [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sequence Stratigraphic Analysis of the Volcanic Rock–Evaporite–Clastic Rock Symbiotic Zone in the Fourth Member of the Shahejie Formation in the South of Laizhou Bay

Zhao,

Wang,

Zhang

2024

Applied Sciences

View full text Add to dashboard Cite

Laizhou Bay Sag is a typical continental rift lake basin, which is affected by strike–slip activity, salt rock activity, volcanic activity, and paleoclimate change in the Tanlu fault zone, where three major lithologies—volcanic rock, clastic rock, and evaporite—mainly develop. In order to determine the sequence correspondence between the different lithologies in the study area based on drilling, logging data, and seismic data, it is determined that the fourth member of the Shahejie Formation in the southern Laizhou Bay mainly develops three types of sequences: clastic rock type sequences, salt lake type sequences, and volcanic rock/clastic rock type sequences. Two second-order sequence boundaries (SBs3L, SBs4L) and one third-order sequence boundary (SBs4U) were identified, and the principle of three divisions of system tracts (LST, TST, HST) and sedimentary processes in different types of sequences were determined by analyzing the stacking patterns of different sequences. Compared with the previous research results, this study provides a more detailed analysis of the sequence boundary definition of different blocks and different lithologic strata, and it improves the previous general sequence stratigraphic division method. Based on the study of distinct types of sequences, a unified stratigraphic framework is established in the whole zone, and the stratum thickness distribution of the fourth member of Shahejie Formation is smaller in the southwest and larger in the northeast. The study area is generally filled with pyroclastic rocks–evaporite–clastic rocks, changing from fan delta–saline lake filling to braided river delta–freshwater lake–fan delta filling from bottom to top. A sequence stratigraphic model for the comparison of steep slope–gentle slope differences is established to provide guidance for future oil and gas field exploration and development.

show abstract

Section: Geological Conditions Of the Study Areamentioning

confidence: 99%