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Artículos de revistas sobre el tema "Collapsed paleocave"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 8 de febrero de 2022

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1

McMechan, George A., Robert G. Loucks, Paul Mescher, and Xiaoxian Zeng. "Characterization of a coalesced, collapsed paleocave reservoir analog using GPR and well‐core data." GEOPHYSICS 67, no. 4 (2002): 1148–58. http://dx.doi.org/10.1190/1.1500376.

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The three‐dimensional architecture, spatial complexity, and pore‐type distribution are mapped in a near‐surface analog of a coalesced, collapsed paleocave system in the Lower Ordovician Ellenburger Group near the city of Marble Falls in central Texas. The surface area of the site has dimensions of about 350 × 1000 m. The data collected include about 12 km of 50‐MHz ground‐penetrating radar (GPR) data arranged in a grid of orthogonal lines, 29 cores of about 15‐m length, and detailed facies maps of an adjacent quarry face. Electrical property measurements along with detailed core descriptions w
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2

Reis, João Andrade dos, David Lopes de Castro, Thales Eduardo Silva de Jesus, and Francisco Pinheiro Lima Filho. "Characterization of collapsed paleocave systems using GPR attributes." Journal of Applied Geophysics 103 (April 2014): 43–56. http://dx.doi.org/10.1016/j.jappgeo.2014.01.007.

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3

McMechan, George A., Robert G. Loucks, Xiaoxian Zeng, and Paul Mescher. "Ground penetrating radar imaging of a collapsed paleocave system in the Ellenburger dolomite, central Texas." Journal of Applied Geophysics 39, no. 1 (1998): 1–10. http://dx.doi.org/10.1016/s0926-9851(98)00004-4.

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4

Zeng, Hongliu, Guizhong Wang, Xavier Janson, et al. "Characterizing seismic bright spots in deeply buried, Ordovician Paleokarst strata, Central Tabei uplift, Tarim Basin, Western China." GEOPHYSICS 76, no. 4 (2011): B127—B137. http://dx.doi.org/10.1190/1.3581199.

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Anomalous seismic-amplitude bright spots are a common feature in deeply buried (5500 to 6500 m) Ordovician limestone strata in the Central Tabei Uplift area of the Tarim Basin in northwest China. Those anomalies have proven to be useful indicators of reservoir quality. The bright spots as seen on seismic data are tied to high-gamma ray, low-velocity zones in wireline logs, and correspond to clastic cave sediment-fills in the host limestone in core. Synthetic seismic models confirm this relationship between seismic bright spots and cave-sediment fills. A seismic traveltime map of the top Ordovi
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5

Loucks, Robert G., Paul K. Mescher, and George A. McMechan. "Three-dimensional architecture of a coalesced, collapsed-paleocave system in the Lower Ordovician Ellenburger Group, central Texas." AAPG Bulletin 88, no. 5 (2004): 545–64. http://dx.doi.org/10.1306/12220303072.

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6

dos Reis Júnior, João Andrade, David Lopes de Castro, Albert Casas, Mahjoub Himi, and Francisco Pinheiro Lima‐Filho. "ERT and GPR survey of collapsed paleocave systems at the western border of the Potiguar Basin in northeast Brazil." Near Surface Geophysics 13, no. 4 (2015): 369–81. http://dx.doi.org/10.3997/1873-0604.2015013.

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7

LI, Wenke, Yan ZHANG, Baomin ZHANG, Jinsong LI, Jun WANG, and Xiaoyu MA. "Origin, characteristics and significance of collapsed-paleocave systems in Sinian to Permian carbonate strata in Central Sichuan Basin, SW China." Petroleum Exploration and Development 41, no. 5 (2014): 563–73. http://dx.doi.org/10.1016/s1876-3804(14)60067-7.

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8

Harbi, Hussein, and George A. McMechan. "Conductivity and scattering Q in GPR data: Example from the Ellenburger dolomite, central Texas." GEOPHYSICS 77, no. 4 (2012): H63—H78. http://dx.doi.org/10.1190/geo2011-0337.1.

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Total attenuation ([Formula: see text]) in ground-penetrating radar (GPR) data is a composite of intrinsic and scattering attenuations ([Formula: see text] and [Formula: see text]). For nonmagnetic materials, [Formula: see text] is a combination of the effects of real conductivity and dielectric relaxation. The attenuation for real conductivity [Formula: see text] in the GPR frequency band is a function of frequency while the dielectric relaxation is frequency-independent. These frequency behaviors allow separation of the attenuation types by attributing and fitting the [Formula: see text] dec
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9

Russel-Houston, Jen, and Ken Gray. "Paleokarst in the Grosmont Formation and reservoir implications, Saleski, Alberta, Canada." Interpretation 2, no. 3 (2014): SF29—SF50. http://dx.doi.org/10.1190/int-2013-0187.1.

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We delineated a bitumen-rich paleokarsted carbonate reservoir of the Upper Devonian (Frasnian) Grosmont Formation with a high-resolution 3D seismic survey tied to core and petrophysical log data from 35 wells within a [Formula: see text] study area in northern Alberta, Canada. There were two laterally continuous karst facies: a solution-enhanced vuggy dolostone that resulted from the carbonate dissolution of body fossils and a stratiform breccia that resulted from the dissolution of interbedded evaporites. Three laterally discontinuous karst facies were identified: sinkhole fills, collapsed pa
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10

Harbi, Hussein, and George A. McMechan. "Modeling 3D porosity and permeability from GPR data in the Ellenburger Dolomite, central Texas." GEOPHYSICS 76, no. 6 (2011): J35—J46. http://dx.doi.org/10.1190/geo2011-0051.1.

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Three-dimensional porosity and permeability were modeled in an Ellenburger carbonate reservoir analog from 2D crosshole and 3D surface survey ground-penetrating radar (GPR) data. Two-dimensional GPR crosshole velocity tomography, 3D migration of the GPR surface data, and porosity and permeability calibration to GPR attributes results in 3D porosity and permeability predictions that provide a consistent model of the paleocave structures and facies distributions. Picking the maximum instantaneous amplitude of the direct arrival wavelet for velocity tomography reduces uncertainties caused by a lo
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11

Vellekoop, Johan, Lineke Woelders, Sanem Açikalin, et al. "Ecological response to collapse of the biological pump following the mass extinction at the Cretaceous–Paleogene boundary." Biogeosciences 14, no. 4 (2017): 885–900. http://dx.doi.org/10.5194/bg-14-885-2017.

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Abstract. It is commonly accepted that the mass extinction associated with the Cretaceous–Paleogene (K–Pg) boundary (∼ 66 Ma) is related to the environmental effects of a large extraterrestrial impact. The biological and oceanographic consequences of the mass extinction are, however, still poorly understood. According to the Living Ocean model, the biological crisis at the K–Pg boundary resulted in a long-term reduction of export productivity in the early Paleocene. Here, we combine organic-walled dinoflagellate cyst (dinocyst) and benthic foraminiferal analyses to provide new insights into ch
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12

Wood, David J., and Jason B. Saleeby. "Late Cretaceous-Paleocene Extensional Collapse and Disaggregation of the Southernmost Sierra Nevada Batholith." International Geology Review 39, no. 11 (1997): 973–1009. http://dx.doi.org/10.1080/00206819709465314.

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13

BROWN, DAVID J., EOGHAN P. HOLOHAN, and BRIAN R. BELL. "Sedimentary and volcano-tectonic processes in the British Paleocene Igneous Province: a review." Geological Magazine 146, no. 3 (2009): 326–52. http://dx.doi.org/10.1017/s0016756809006232.

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AbstractResearch on the British Paleocene Igneous Province (BPIP) has historically focused on the emplacement, chemistry and chronology of its elaborate central intrusive complexes and lava fields. However, the BPIP has also been dramatically shaped by numerous erosion, sedimentation and volcano-tectonic events, the significance of which becomes ever clearer as localities in the BPIP are re-investigated and our understanding of volcano-sedimentary processes advances. The resultant deposits provide important palaeo-environmental, palaeo-geographical and stratigraphical information, and highligh
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14

Imbert, Patrice, and Sutieng Ho. "Seismic-scale funnel-shaped collapse features from the Paleocene–Eocene of the North West Shelf of Australia." Marine Geology 332-334 (December 2012): 198–221. http://dx.doi.org/10.1016/j.margeo.2012.10.010.

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15

Blanchette, Robert A., Kory R. Cease, André R. Abad, Todd A. Burnes, and John R. Obst. "Ultrastructural characterization of wood from Tertiary fossil forests in the Canadian Arctic." Canadian Journal of Botany 69, no. 3 (1991): 560–68. http://dx.doi.org/10.1139/b91-076.

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Micromorphological and ultrastructural characterization of fossil gymnosperm wood from Comwallis Island, Axel Heiberg Island, and Ellesmere Island in the Canadian High Arctic showed the changes that have occurred in cell walls of wood during 20–60 million years of burial. No evidence of permineralization was observed. Wood with rounded cells, thick secondary walls, and intercellular spaces was common in all samples. Secondary walls were eroded and swollen. A transition from an organized secondary wall, with altered but visible microfibrillar structure, to an electron-dense, amorphous material
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16

McDonnell, Angela, Robert G. Loucks, and Tim Dooley. "Quantifying the origin and geometry of circular sag structures in northern Fort Worth Basin, Texas: Paleocave collapse, pull-apart fault systems, or hydrothermal alteration?" AAPG Bulletin 91, no. 9 (2007): 1295–318. http://dx.doi.org/10.1306/05170706086.

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17

Gallagher, W. B. "Recent mosasaur discoveries from New Jersey and Delaware, USA: stratigraphy, taphonomy and implications for mosasaur extinction." Netherlands Journal of Geosciences 84, no. 3 (2005): 241–45. http://dx.doi.org/10.1017/s0016774600021028.

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AbstractThe Upper Cretaceous deposits of New Jersey and Delaware produced the first mosasaur specimens collected in North America. Recent recovery of mosasaur specimens from streambank exposures and new excavation sites has increased our knowledge of the stratigraphic distribution of these animals in the northern Atlantic coastal plain. Reassessment of the source and age of mosasaur specimens from the Big Brook site and other localities in Monmouth County (NJ) has greatly increased the number of known Campanian mosasaur specimens from this region. Two main taphonomic occurrence modes are noted
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18

Gallagher, W. B. "Oligotrophic oceans and minimalist organisms: collapse of the Maastrichtian marine ecosystem and Paleocene recovery in the Cretaceous-Tertiary sequence of New Jersey." Netherlands Journal of Geosciences - Geologie en Mijnbouw 82, no. 3 (2003): 225–31. http://dx.doi.org/10.1017/s0016774600020813.

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AbstractThe inner Atlantic Coastal Plain of New Jersey reveals exposures of fossiliferous Maastrichtian and Danian deposits. Recent fossil discoveries in this interval are here reported, and placed in the context of Cretaceous/Tertiary (K/T) faunal changes. The exposure at the Inversand Pit at Sewell (New Jersey) is the last active marl mine in the region, and stands as an important reference section for the many significant discoveries of vertebrate fossils produced by the marl mining industry at its zenith. Changes in planktonic populations across the K/T boundary are related to Maastrichtia
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19

Peña-Alonso, T. A., J. Estrada-Carmona, R. S. Molina-Garza, L. Solari, G. Levresse, and C. Latorre. "Lateral spreading of the middle to lower crust inferred from Paleocene migmatites in the Xolapa Complex (Puerto Escondido, Mexico): Gravitational collapse of a Laramide orogen?" Tectonophysics 706-707 (June 2017): 143–63. http://dx.doi.org/10.1016/j.tecto.2017.04.010.

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20

Králiková, Silvia, Rastislav Vojtko, Ubomír Sliva, et al. "Cretaceous—Quaternary tectonic evolution of the Tatra Mts (Western Carpathians): constraints from structural, sedimentary, geomorphological, and fission track data." Geologica Carpathica 65, no. 4 (2014): 307–26. http://dx.doi.org/10.2478/geoca-2014-0021.

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Abstract The Tatra Mts area, located in the northernmost part of Central Western Carpathians on the border between Slovakia and Poland, underwent a complex Alpine tectonic evolution. This study integrates structural, sedimentary, and geomorphological data combined with fission track data from the Variscan granite rocks to discuss the Cretaceous to Quaternary tectonic and landscape evolution of the Tatra Mts. The presented data can be correlated with five principal tectonic stages (TS), including neotectonics. TS-1 (~95-80 Ma) is related to mid-Cretaceous nappe stacking when the Tatric Unit was
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21

Katrivanos, E., A. Kilias, and D. Mountrakis. "DEFORMATION HISTORY AND CORRELATION OF PAIKON AND TZENA TERRANES (AXIOS ZONE, CENTRAL MACEDONIA, GREECE)." Bulletin of the Geological Society of Greece 50, no. 1 (2017): 34. http://dx.doi.org/10.12681/bgsg.11699.

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Paikon and Tzena terranes are situated in the centre part of Axios zone, between Almopia and Paionia ophiolitic belts. Tectonostratigraphic data reveal that both have been affected by the same polyphase deformation and metamorphism, as well that they have the same lithostratigraphic column. The first deformation phase took place during the Middle to Late Jurassic and is associated with ophiolite obduction, nappe- stacking, terrane accretion and crustal thickening (D1). Metamorphism does not exceed greenschist facies (M1). Relict HP-LT metamorphic assemblages predating M1 metamorphism are possi
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22

Vanderhaeghe, Olivier, Christian Teyssier, and Richard Wysoczanski. "Structural and geochronological constraints on the role of partial melting during the formation of the Shuswap metamorphic core complex at the latitude of the Thor-Odin dome, British Columbia." Canadian Journal of Earth Sciences 36, no. 6 (1999): 917–43. http://dx.doi.org/10.1139/e99-023.

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At the latitude of the Thor-Odin dome, the Shuswap metamorphic core complex exposes a ~15 km thick structural section composed of an upper unit that preserved Mesozoic metamorphism, structures, and cooling ages, separated from the underlying high-grade rocks by low-angle detachment zones. Below the detachments, the core of the complex consists of an amphibolite-facies middle unit overlying a migmatitic lower unit exposed in the core of the Thor-Odin dome. Combined structural and super high resolution ion microprobe (SHRIMP) U-Pb geochronology studies indicate that the pervasive shallowly dippi
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23

Armstrong, Richard Lee, Randall R. Parrish, Peter van der Heyden, Krista Scott, Dita Runkle, and Richard L. Brown. "Early Proterozoic basement exposures in the southern Canadian Cordillera: core gneiss of Frenchman Cap, Unit I of the Grand Forks Gneiss, and the Vaseaux Formation." Canadian Journal of Earth Sciences 28, no. 8 (1991): 1169–201. http://dx.doi.org/10.1139/e91-107.

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The protolith age of high-grade metamorphic rocks exposed in structurally deep parts of the Omineca Crystalline Belt has been the subject of investigation and controversy for decades. We have applied multiple isotopic dating techniques to rocks of three structural culminations: the Monashee complex (which includes the Frenchman Cap and Thor–Odin gneiss domes), the Grand Forks horst, and the Vaseaux Formation, which lies in the footwall of the Okanagan Valley fault.Frenchman Cap core gneisses contain highly radiogenic Sr that scatters about a 2206 ± 117 Ma (1σ) Rb–Sr isochron with 87Sr/86Sr ini
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24

Kontakiotis, George, Leonidas Moforis, Vasileios Karakitsios, and Assimina Antonarakou. "Sedimentary Facies Analysis, Reservoir Characteristics and Paleogeography Significance of the Early Jurassic to Eocene Carbonates in Epirus (Ionian Zone, Western Greece)." Journal of Marine Science and Engineering 8, no. 9 (2020): 706. http://dx.doi.org/10.3390/jmse8090706.

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Sedimentological, micropalaeontological, and marine geological results from the Early Jurassic to Eocene carbonate formations of the Ionian zone, from six localities of Epirus, provide new insights into the basin palaeogeographic evolution and better correlation with coeval analogous tectono-stratigraphic successions along the southern margin of the Neo-Tethys Ocean. Facies analysis allowed the recognition of several microfacies types and their depositional characteristics. During the Early Jurassic, autochthonous carbonates (Pantokrator Limestones) were deposited in shallow-water environment.
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25

Le Roy, Charlotte, and Claude Rangin. "Cenozoic crustal deformation of the offshore Burgos basin region (NE Gulf of Mexico). A new interpretation of deep penetration multichannel seismic reflection lines." Bulletin de la Société Géologique de France 179, no. 2 (2008): 161–74. http://dx.doi.org/10.2113/gssgfbull.179.2.161.

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Abstract Along northeastern Mexico close to the Texas-Mexico border, the Burgos basin and its extension offshore was developed and deformed from the Paleocene up to Present time. This is a key triple junction between the sub meridian dextral transtensive coastal plain of the Gulf of Mexico extending far to the south in Mexico, the NE Corsair fault zone offshore and the sinistral Rio Bravo fault zone, a reactivated segment of the Texas lineament. Offshore NE Mexico, in the main study area covered by available seismic profiles, we have evidenced below the main well known gravitational décolleme
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26

Aguirre, Julio, Robert Riding, and Juan C. Braga. "Diversity of coralline red algae: origination and extinction patterns from the Early Cretaceous to the Pleistocene." Paleobiology 26, no. 4 (2000): 651–67. http://dx.doi.org/10.1666/0094-8373(2000)026<0651:docrao>2.0.co;2.

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Data from a comprehensive literature survey for the first time provide stage-level resolution of Early Cretaceous through Pleistocene species diversity for nongeniculate coralline algae. Distributions of a total of 655 species in 23 genera were compiled from 222 publications. These represent three family-subfamily groupings each with distinctive present-day distributions: (1) Sporolithaceae, low latitude, mainly deep water; (2) Melobesioid corallinaceans, high latitude, shallow water, to low latitude, deep water; (3) Lithophylloid/mastophoroid corallinaceans, mid- to low latitude, shallow wate
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27

BOZKURT, ERDİN. "Extensional v. contractional origin for the southern Menderes shear zone, SW Turkey: tectonic and metamorphic implications." Geological Magazine 144, no. 1 (2006): 191–210. http://dx.doi.org/10.1017/s0016756806002664.

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The southern Menderes Massif in southwest Turkey consists mainly of orthogneisses and overlying Palaeozoic–Middle Paleocene schists and marbles. The contact between the two distinct rock types is almost everywhere structural, herein named the southern Menderes shear zone: a S-facing, high-angle ductile shear zone that separates metamorphic rocks of differing grade. Although there is a consensus that the shear zone was associated with top-to-the-S–SSW shearing and is of Tertiary age, its origin and nature have been highly debated over the last decade. Some claim the contact is a thrust fault, w
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28

R. G. Loucks, Paul Mescher. "Architecture of Collapsed-Paleocave Reservoirs: ABSTRACT." AAPG Bulletin 80 (1996). http://dx.doi.org/10.1306/522b32e5-1727-11d7-8645000102c1865d.

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29

LOUCKS, ROBERT G., Bureau of Econom. "ABSTRACT: Relationship between Paleocave Facies and Associated Pore Networks in Coalesced, Collapsed-Paleocave Systems." AAPG Bulletin 85 (2001). http://dx.doi.org/10.1306/8626c861-173b-11d7-8645000102c1865d.

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30

Loucks, Robert G. "A Review of Coalesced, Collapsed-Paleocave Systems and Associated Suprastratal Deformation." Acta Carsologica 36, no. 1 (2007). http://dx.doi.org/10.3986/ac.v36i1.214.

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31

ADAMS, R. D., J. W. COLLISTER, D. D. "Abstract: Evaluation of Gas Reservoirs in Collapsed Paleocave Systems: Ellenburger Group, Permian Basin, Texas ." AAPG Bulletin 83 (1999) (1999). http://dx.doi.org/10.1306/e4fd48c3-1732-11d7-8645000102c1865d.

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32

Robert G. Loucks1, Paul Mescher2, G. "ABSTRACT: Characterizing the Three-Dimensional Architecture of a Coalesced, Collapsed-Paleocave System in the Lower Ordovician, Ellenburger Group by Integrating Ground-Penetrating Radar, Shallow-Core, and Outcrop Data." AAPG Bulletin 85 (2001). http://dx.doi.org/10.1306/61eec586-173e-11d7-8645000102c1865d.

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33

Zhao, Bin, Guangyou Zhu, Yanjun Shang, and Hui Zhang. "Predicting collapse depth of paleocaves in carbonate reservoirs." Carbonates and Evaporites 36, no. 2 (2021). http://dx.doi.org/10.1007/s13146-021-00700-1.

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34

Tian, Skye Yunshu, Moriaki Yasuhara, Huai-Hsuan M. Huang, Fabien L. Condamine, and Marci M. Robinson. "Shallow marine ecosystem collapse and recovery during the Paleocene-Eocene Thermal Maximum." Global and Planetary Change, September 2021, 103649. http://dx.doi.org/10.1016/j.gloplacha.2021.103649.

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35

Shaw, Jack O., Simon D'haenens, Ellen Thomas, et al. "Photosymbiosis in planktonic foraminifera across the Paleocene–Eocene thermal maximum." Paleobiology, March 5, 2021, 1–16. http://dx.doi.org/10.1017/pab.2021.7.

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Abstract Under stress, corals and foraminifera may eject or consume their algal symbionts (“bleach”), which can increase mortality. How bleaching relates to species viability over warming events is of great interest given current global warming. We use size-specific isotope analyses and abundance counts to examine photosymbiosis and population dynamics of planktonic foraminifera across the Paleocene–Eocene thermal maximum (PETM, ~56 Ma), the most severe Cenozoic global warming event. We find variable responses of photosymbiotic associations across localities and species. In the NE Atlantic (DS
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36

Vice, Lianna, H. Daniel Gibson, and Steve Israel. "Late Cretaceous to Paleocene Tectonometamorphic Evolution of the Blanchard River Assemblage, Southwest Yukon: New Insight into the Terminal Accretion of Insular Terranes in the Northern Cordillera." Lithosphere 2020, no. 1 (2020). http://dx.doi.org/10.2113/2020/2298288.

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Abstract The Intermontane-Insular terrane boundary stretches over 2000 kilometers from British Columbia to Alaska in the western Cordillera. Juxtaposed between these terranes is a series of Jura-Cretaceous basinal and arc assemblages that record a complicated and contested tectonic evolution related to the Mesozoic-Paleocene accretionary history of northwestern North America. In southwest Yukon, west-verging thrust faults facilitated structural stacking of the Yukon-Tanana terrane over these basinal assemblages, including the Early Cretaceous Blanchard River assemblage. These previously undate
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37

Japsen, Peter, Paul F. Green, and James A. Chalmers. "Thermo-tectonic development of the Wandel Sea Basin, North Greenland." GEUS Bulletin 45, no. 1 (2021). http://dx.doi.org/10.34194/geusb.v45.5298.

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The Carboniferous–Palaeogene Wandel Sea Basin of eastern North Greenland (north of 80°N, east of 40°W) is an important piece in the puzzle of Arctic geology. It is particularly important for understanding how the Paleocene–Eocene convergence between Greenland, the Canadian Arctic and Svalbard relates to the compressional tectonics in the High Arctic, collectively known as the Eurekan Orogeny. In this study, we present apatite fission-track analysis (AFTA) data and review published vitrinite reflectance data combined with observations from the stratigraphic record to place firmer constraints on
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