Carbonate Submarine Fan Deposits of the Mississippian Lake Valley Formation, Sacramento Mountains, New Mexico
نویسندگان
چکیده
Abstract Deepwater carbonate deposition is relatively poorly understood but an area of vigorous research in academia and industry, where these deposits are a significant component many unconventional petroleum reservoirs. Recent studies modern deepwater carbonates have highlighted the wide variety depositional processes, sediment types resultant geomorphology; however, well‐documented outcrops ancient systems, their rock architecture sparse. The Mississippian Lake Valley Formation provides world‐class exposures slope‐basinal deposits. Tierra Blanca Doña Ana members comprise submarine fans that >14 to 20 km length, >5 wide, exposed strike dip view, affording unique opportunity constrain architecture, sedimentary processes. sedimentation was dominated by crinoids shed from up‐dip platform supplemented sediments sourced locally Waulsortian mounds. Depositional processes include turbidity flows, debris flows hybrid sediment‐gravity flows. fan thins towards its lateral flanks distal fringe, become more mud‐dominated, gravelly grain‐supported less common, fewer beds scoured bases. In proximal settings, bed tracing complemented measured sections allow mapping stratal surfaces identification stories, elements complexes. evolved unconfined confined deposition. Point‐sourced required funnelling mechanism, likely due bathymetry created mounds or possibly margin re‐entrant. Outcrop illustrate younger onlap onto, compensationally stack with, thickest portions antecedent fan. These both similarities differences between siliciclastic gravity flow Similarities comparable deposit types, architecture; relate hydrodynamics grains, mechanisms for point‐sourced sequence stratigraphic forcing.
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ژورنال
عنوان ژورنال: The depositional record
سال: 2023
ISSN: ['2055-4877']
DOI: https://doi.org/10.1002/dep2.246