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Early grain-coat formation in Chaco dune field, New Mexico; insight into formation mechanisms, distribution, and implications for predictive modeling to assist in deep play identification


, : Early grain-coat formation in Chaco dune field, New Mexico; insight into formation mechanisms, distribution, and implications for predictive modeling to assist in deep play identification. Annual Meeting - American Association of Petroleum Geologists

Clay grain-coats preserve favorable reservoir quality in deeply buried eolian sandstones by inhibiting quartz cement. Reported mechanisms for clay-coat formation include: 1. Translocation of airfall/rainout dust into eolian sands. 2. Inheritance of coated sand grains from ephemeral fluvial systems. Sparse information exists regarding where the coating processes are most effective, the distribution of clay-coated sands in fluvial-eolian environments, and survivability of coats during eolian transport. Such limited knowledge makes pre-drill predictions of coated grains difficult. Consequently, we are conducting field studies in modern eolian environments focused on the genetics and distribution of clay-coated sands. This work will form the basis for predicting the presence, continuity, and composition of clay grain-coats in ancient eolian strata that are potential reservoir targets. The Chaco dune field, northwest New Mexico, was selected as one of several investigation sites. A transect from the Chaco River to the northeast was sampled that includes sand sheets, barchanoid dunes, parabolic dunes, ephemeral fluvial channels, and Cretaceous age bedrock. Consistent with literature, clay-coated grains are found in Chaco River sediments. These fluvially coated grains appear-to-be transported by wind into the adjacent dune field from the river bed and lose their coats by abrasion. Clay coats are subsequently regenerated in nascent soils by translocation of dust into vegetation-stabilized dunes and sand sheets. Climate is a key control on vegetation which promotes stabilization of the sands and coat regeneration. Climate cyclicity also is important. Conditions must periodically be dry enough to allow eolian transport, but wet enough at intervening times for stabilization and translocation. The results are being incorporated into a probabilistic predictive model.

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Other references

Salama, HS.; Zaki, FN., 1986: Effect of Bacillus thuringiensis Berliner on prepupal and pupal stages of Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae). The effect of Bacillus thuringiensis subsp. kurstaki at 1.25, 2.5, 5, 10 and 20 g/litre on the prepupal and pupal stages of Spodoptera littoralis, a pest of cotton, was assessed in the laboratory. Prepupae were placed in soil which had already bee...

Hadden C.T., 1981: Post replication repair of uv irradiated transforming dna in bacillus subtilis. Repair of UV-irradiated transforming DNA in several strains of B. subtilis was studied in order to determine the effects of excision repair and postreplication repair on transformation. Two mutations that cause a Uvr- phenotype (uvr-1 and uvr-42)...

Ghazal, Y.Abu.; Stahnisch, F.W.; Poetzl, O., 2016: Otto Poetzl (1877-1962). Journal of Neurology 262(3): 795-797

Dincel, G.Cagdas.; Kul, O., 2016: Increased expressions of ADAMTS-13, neuronal nitric oxide synthase, and neurofilament correlate with severity of neuropathology in Border disease virus-infected small ruminants. Border Disease (BD), caused by Pestivirus from the family Flaviviridae, leads to serious reproductive losses and brain anomalies such as hydranencephaly and cerebellar hypoplasia in aborted fetuses and neonatal lambs. In this report it is aimed to...

Chu, N.T.; Clydesdale, F.M., 1976: Decomposition of organic acids during processing and storage. Organic acid solutions (0.1 N) and tissue level concentrations were processed at several temperatures with various FO values. Analyses were done using an automatic organic acid analyzer and paper chromatography. Pyrrolidone-carboxylic acid was pro...

Greene, J.; Grizzle, R.; Adams, J., 2003: Mapping and characterizing eastern oyster reefs using underwater videography and quadrat sampling. Journal of Shellfish Research 22(1): 332, June

Kekelidze, N.; Fishman, G., 1973: Investigations of the essential oils of some citrus fruits. Subtropicheskie kul'tury: 50-54

Tollo Richard; Aleinikoff John N., 2001: Petrologic and temporal characteristics of Grenville-age orogenesis, Blue Ridge Province, Virginia. New data obtained through detailed geologic mapping, petrologic investigations, and SHRIMP and TIMS U-Pb isotopic analyses of zircon and monazite indicate that basement rocks of the Blue Ridge province in northern Virginia preserve evidence of epi...

Dren, C.; Nemeth, I.; Gyorvari, I.; Horvath, P., 1990: Isolation and characterization of reticuloendotheliosis virus originated from turkey. Short autoreview. In large scale turkey flocks with high rates of reticuloendotheliosis (REV) seropositivity, mortality rate due to lymphatic neoplasms was less than 2%. In some of the flocks a high percentage (40 to 50) of egg were infertile. By virus isolation an...

Wood, B.; Collard, M., 1998: Masticatory characters and primate phylogeny estimation. American Journal of Physical Anthropology (SUPPL 26): 234-235