Paleokarst pp 385-405 | Cite as
Sedimentation and Diagenesis Along an Island-Sheltered Platform Margin, El Abra Formation, Cretaceous of Mexico
Abstract
The mid-Cretaceous El Abra Formation was studied along the eastern margin of the Valles—San Luis Potosi (SLP) platform to determine (1) environments and processes of platform-margin sedimentation, and (2) the diagenetic sequence and mechanisms of porosity evolution in carbonates subjected to extensive early diagenesis, including subaerial exposure and development of microkarst. Syndepositional, late eogenetic, and telogenetic episodes of karst formation are present.
Eight lithofacies are recognized from textural and faunal attributes and sedimentary structures. Platform-lagoon lithofacies include peloid-miliolid, requienid, and bioclastic limestones. Lime mudstone, laminated lime grainstone, cryptalgal laminites, and fenestral limestone record tidal-flat environments. Perireefal islands consisted of storm-deposited rudistid-skeletal limestones cemented by calcrete.
Numerous subaerial discontinuity surfaces marked by microkarst, calcrete, and penecontemporaneous dolomite horizons provide correlation surfaces for identification of laterally equivalent depositional environments. Islands graded bankward through a mosaic of coalescing tidal flats into the platform lagoon. Whereas islands persisted through time, tidal flats were episodically submerged during rapid relative rises in sealevel of less than 10 m net magnitude. Subsequently, tidal flats prograded into the platform lagoon, resulting in asymmetric, shoaling-upward sequences separated by subaerial discontinuity surfaces.
Early diagenetic environments on tidal flats were ephemeral; but comparable environments were recreated at comparable stages of each depositional cycle. Extensive penecontemporaneous meteoric diagenesis occurred as a consequence of enduring exposure of islands and repeated exposure of tidal flats. Dissolution below microkarst surfaces, calcrete formation, and mineralogic stabilization rapidly transformed the sediment to limestone. Upon submergence, marine cementation by radiaxial fibrous Mg-calcite and internal sedimentation were important porosity-reducing processes, further lithifying the limestone and precluding compaction.
The Valles—SLP platform was locally exposed and subjected to a second episode of karst development during latest Turonian to Santonian time. Major porosity occlusion by meteoric calcite cement occurred at this time. Limited burial diagenesis included precipitation of saddle dolomite, stylolitization, and fracturing during the Laramide Orogeny. Uplift and erosion during the Cenozoic resulted in a third episode of karst development, evident in the present landscape as subsurface drainage.
Keywords
Tidal Flat Subaerial Exposure Platform Margin Bioclastic Limestone Internal SedimentPreview
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References
- Aguayo, J.E., 1978, Sedimentary environments and diagenesis of a Cretaceous reef complex, eastern Mexico: An. Centro Cienc. del Mar y Limnol., Univ. Nal. Auton. Mexico, v. 5, p. 83–140.Google Scholar
- Brand, U., Veizer, J., 1980, Chemical diagenesis of a multicomponent carbonate system—1: trace elements: Jour. Sed. Petrology, v. 50, p. 1219–1236.Google Scholar
- Dodd, J.R., Siemers, C.T., 1971, Effect of Late Pleistocene karst topography on Holocene sedimentation and biota, lower Florida Keys: Geol. Soc. America Bull., v. 82, p. 211–218.CrossRefGoogle Scholar
- Dunham, R.J., 1969, Early vadose silt in Townsend Mound (Reef), New Mexico: Soc. Econ. Paleontologists and Mineralogists Spec. Pub. 14, p. 139–181.Google Scholar
- Dunham, R.J., 1971, Meniscus cement, in Bricker, O.P., ed., Carbonate cements: Baltimore, Johns Hopkins, p. 297–300.Google Scholar
- Ebanks, W.J., 1975, Holocene carbonate sedimentation and diagenesis, Ambergris Cay, Belize: Am. Assoc. Petroleum Geologists Studies in Geology 2, p. 234–296.Google Scholar
- Enos, Paul, 1974, Reefs, platforms, and basins of middle Cretaceous of northeast Mexico: Am. Assoc. Petroleum Geologists Bull., v. 58, p. 800–809.Google Scholar
- Enos, Paul, 1983, Introduction, in Minero, C.J., Enos, P., Aguayo, J.E., Sedimentation and diagenesis of mid-Cretaceous platform margin, east-central Mexico, Dallas Geological Society, p. 1–19.Google Scholar
- Enos, Paul, 1986, Diagenesis of mid-Cretaceous rudist reefs, Valles Platform, Mexico, in Purser, B.H., Schroeder, J.H., eds., Reef diagenesis: Berlin, Springer-Verlag, p. 160–185.Google Scholar
- Enos, Paul, Freeman, T., 1978, Shallow-water limestones from the Blake Nose, sites 390 and 392: Initial Reports of D.S.D.P., v. 44, p. 413–461.Google Scholar
- Enos, Paul, Perkins, R.D., 1979, Evolution of Florida Bay from island stratigraphy: Geol. Soc. America Bull., v. 90, p. 59–83.CrossRefGoogle Scholar
- Esteban, M., Klappa, C.F., 1983, Subaerial exposure environment, in Carbonate depositional environments: Am. Assoc. Petroleum Geologists Memoir 33, p. 1–54.Google Scholar
- Fish, J.E., Ford, D.C., 1973, Karst geomorphology and hydrology of the Sierra de El Abra, S.L.P., Tamps., Mexico: Proc. 6th Intl. Congress of Speleology (Prague), v. 2, p. 151–156.Google Scholar
- Füchtbauer, H., Hardie, L.A., 1976, Experimentally determined homogeneous distribution coefficients for precipitated magnesian calcites: applications to marine carbonate cements: Geol. Soc. Amer. Abs. Prog., v. 8, p. 877.Google Scholar
- Graf, D.L., Goldsmith, J.R., 1956, Some hydrothermal syntheses of dolomite and protodolomite: Jour. Geology, v. 64, p. 173–186.CrossRefGoogle Scholar
- Hardie, L.A., Ginsburg, R.N., 1977, Layering—the origin and environmental significance of lamination and thin bedding, in Hardie, L.A., ed., Sedimentation on the modern carbonate tidal flats of northwest Andros Island, Bahamas: Baltimore, Johns Hopkins, p. 50–123.Google Scholar
- Harmon, R.S., 1971, Preliminary results on the groundwater geochemistry of the Sierra de El Abra region, north-central Mexico, Nat. Speleological Soc. Bull., v. 33, p. 73–85.Google Scholar
- Harrison, R.S., 1977, Caliche profiles: indicators of near-surface subaerial diagenesis, Barbados, West Indies: Bull. Can. Petroleum Geology, v. 25, p. 123–173.Google Scholar
- Jennings, J.N., 1971, Karst: Cambridge, MA, MIT Press, 252 p.Google Scholar
- Kendall, A.C., 1985, Radiaxial fibrous calcite: a reappraisal: carbonate cements: Soc. Econ. Paleontologists and Mineralogists Spec. Pub. 36, p. 59–77.Google Scholar
- Kennedy, W.J., 1975, Trace fossils in carbonate rocks, in Frey, R.W., ed., The study of trace fossils: New York, Springer-Verlag, p. 377–398.Google Scholar
- Land, L.S., 1973, Holocene meteoric dolomitization of Pleistocene limestones, North Jamaica: Sedimentology, v. 20, p. 411–424.CrossRefGoogle Scholar
- Lindholm, R.C., Finkelmann, R.B., 1972, Calcite staining: semiquantitative determination of ferrous iron: Jour. Sed. Petrology, v. 42, p. 239–242.Google Scholar
- Lohmann, K.C., Meyers, W.J., 1977, Micro-dolomite inclusions in cloudy prismatic calcites: a proposed criterion for former high-magnesium calcites: Jour. Sed. Petrology, v. 47, p. 1078–1088.Google Scholar
- Matthews, R.K., 1974, A process approach to diagenesis of reefs and reef associated limestones: Soc. Econ. Paleontologists and Mineralogists Spec. Pub. 18, p. 234–256.Google Scholar
- McKee, E.D., 1959, Storm sedimentation on a Pacific atoll: Jour. Sed. Petrology, v. 29, p. 354–364.Google Scholar
- Michard, C.R., 1968, Coprecipitation de l’ion manganeux avec le carbonate de calcium: Comptes Rendus Acad. Sci. Paris, Ser. D., v. 269, p. 1685–1688.Google Scholar
- Minero, C.J., 1983a, Sedimentary environments and diagenesis of the El Abra Formation (Cretaceous), Mexico: Unpubl. Ph.D. thesis, SUNY Binghamton, 367 p.Google Scholar
- Minero, C.J., 1983b, Back-reef facies, El Abra Formation, in Minero, C.J., Enos, P., Aguayo, J.E., Sedimentation and diagenesis of mid-Cretaceous platform margin, east-central Mexico: Dallas Geological Society, p. 32–52.Google Scholar
- Müller, G., 1971, “Gravitational” cement: an indicator for the vadose zone of the subaerial diage- netic environment, in Bricker, O.P., ed., Carbonate cements: Baltimore, Johns Hopkins, p. 301–302.Google Scholar
- Multer, H.G., Hoffmeister, J.E., 1968, Subaerial laminated crust of the Florida Keys: Geol. Soc. America Bull., v. 79, p. 183–192.CrossRefGoogle Scholar
- Nelson, R.A., 1981, Significance of fracture sets associated with stylolite zones: Am. Assoc. Petroleum Geologists Bull., v. 65, p. 2417–2425.Google Scholar
- Perkins, R.D., 1977, Depositional framework of Pleistocene rocks in south Florida: Geol. Soc. America Memoir 147, p. 131–198.Google Scholar
- Pingitore, N.E., 1978, The behavior of Zn2+ and Mn2+ during carbonate diagenesis: theory and applications: Jour. Sed. Petrology, v. 48, p. 799–814.Google Scholar
- Plummer, L.N., 1975, Mixing of sea water with calcium carbonate ground water: Geol. Soc. America Memoir 142, p. 219–238.Google Scholar
- Read, J.F., 1974, Calcrete deposits and Quaternary sediments, Edel province, Shark Bay, western Australia: Am. Assoc. Petroleum Geologists Memoir 22, p. 250–282.Google Scholar
- Richter, D.K., Füchtbauer, H., 1978, Ferroan calcite replacement indicates former magnesian calcite skeletons: Sedimentology, v. 25, p. 843–860.CrossRefGoogle Scholar
- Richter, D.K., Zinkernagel, U., 1981, Zur anwendung der katodolumiszenz in der karbonat- petrographie: Geol. Rundschau, Bd. 70, p. 1276–1302.CrossRefGoogle Scholar
- Shinn, E.A., 1968, Selective dolomitization of recent sedimentary structures: Jour. Sed. Petrology, v. 38, p. 612–615.Google Scholar
- Shinn, E.A., Ginsburg, R.N., Lloyd, R.M., 1965, Recent supratidal dolomite from Andros Island, Bahamas: Soc. Econ. Paleontologists and Mineralogists, Spec. Pub. 13, p. 112–123.Google Scholar
- Shinn, E.A., Lloyd, R.M., Ginsburg, R.N., 1969, Anatomy of a modern carbonate tidal flat, Andros Island, Bahamas: Jour. Sed. Petrology, v. 39, p. 1202–1228.Google Scholar
- Skougstad, M.W., Horr, C.A., 1963, Occurrence and distribution of strontium in natural water: U.S. Geol. Survey Water Supply Paper 1496-D, p. 55–97.Google Scholar
- Stoddart, D.R., Steers, J.A., 1977, The nature and origin of coral reef islands, in Jones, O.A., Endean, R., eds., Biology and geology of coral reefs: New York, Academic Press, v. 4, p. 59–105.Google Scholar
- Sweeting, M.M., 1973, Karst landforms: New York, Columbia Univ. Press, 362 p.Google Scholar
- Walkden, G.M., 1974, Paleokarstic surfaces in Upper Visean (Carboniferous) limestones of the Derbyshire Block, England: Jour. Sed. Petrology, v. 44, p. 1232–1247.Google Scholar
- White, D.E., Hem, J.D., Waring, G.A., 1963, Chemical composition of subsurface waters: U.S. Geol. Survey Prof. Paper 440-F, 67 p.Google Scholar
- Woo, K.S., Sandberg, P.A., Anderson, T.F., 1985, Radiaxial fibrous calcite in mid-Cretaceous rudist limestones, Geol. Soc. America Abstracts with Programs, v. 17, p. 754.Google Scholar
- Wright, V.P., 1982, The recognition and interpretation of paleokarst: two examples from the Lower Carboniferous of South Wales: Jour. Sed. Petrology, v. 52, p. 83–94.Google Scholar