 | Pope, Kevin O, Ocampo, Adriana C, Fischer, Alfred G, Alvarez, Walter, Fouke, Bruce W, Webster, Clyde L, Vega, Francisco J, Smit, Jan, Fritsche, A.Eugene, Claeys, Philippe (1999) Chicxulub impact ejecta from Albion Island, Belize. Earth and Planetary Science Letters, 170 (4) 351-364 doi:10.1016/s0012-821x(99)00123-5 | Journal (article/letter/editorial) | | com/locate/epsl Chicxulub impact ejecta from Albion Island, Belize Kevin O. Pope a,Ć , Adriana C. Ocampo b...Abstract Impact ejecta from the Albion Formation are exposed in northern Belize. The ejecta come from the outer...360 km to the northwest. The basal unit of the Albion Formation is a Ÿ1-m-thick clay and dolomite spheroid...sorting, and the presence of multiple flows in the Albion Formation indicate that atmospheres play an important...impact features; Chicxulub Crater; Belize 1. Introduction The Albion Formation was first described by |  | | Journal (article/letter/editorial) | | impact origin ejecta sedimentary sequence: Albion Formation in Belize Shoichi Kiyokawa Department of Earth...December 20ïŒ2005 Accepted November 22, 2006 The Albion Formation, which is located in the southeastern...the Chicxulub impact ïŒPope et al., 1999ïŒ . The Albion Formation is preserved above the uppermost Cretaceous...Mexico, 2ïŒ the Albion region of northwestern Belize and 3ïŒ the Armenia region of central Belize. The stratigraphic...stratigraphic characteristics of the Albion Formation indicate that the formation is formed by impact-related |  | | Journal (article/letter/editorial) | | Chicxulub impact â evidence from ejecta deposits in Belize and Mexicoâ Vivi Vajda a,â, Adriana Ocampo b, Embaie...Keywords: Mass extinction Cretaceous Impact-winter Belize a b s t r a c t Life on Earth was sharply disrupted...ejecta deposits occur in Belize and southern Mexico where the so called Albion island spheroid bed is superimposed...very high in the spheroid bed samples from Albion Island (Belize) and from Ramonal South (Mexico), but are...results show that the target rock consists of both calcite and dolomite. We suggest that the heterogeneous |  | | Book | | data on the proximal K/T deposits at Albion Island in northern Belize. These deposits consist of a basal...authors speculate that each sedimentation unit at Albion may represent a separate emplacement event during...studies of calcites of K/T boundary sediments from Belize, Northern Mexico and distal ejecta deposits (Sopelana...quantitative analyses of proximal impact deposits from Belize and southern Mexico group naturally into three...half-circle that is centered approximately at Osmussaar Island. Although several hypotheses have been proposed |  | | Journal (issue) | | 4 Contents July/August 1996 a Features 4 Belize: Rosetta Stone of the KIT Boundary Between the...from the crater flowing all the way to modernday Belize. Today, the crater itself is buried under hundreds...Fortunately, we identified such a site in northern Belize, about 364 kilometers (226 miles), or two to three...limestone quarry on Albion Island in the Rio Hondo gave us insight into what the environment of Belize was...exposure of the ejecta blanket from Chicxulub in Belize. We found many more clues to the catastrophe: tektites |  | | Journal (article/letter/editorial) | | they are micro-fractured and later healed with calcite. The fractures can be continuous through several...several grains. The arenitic bed is composed of calcite (2/3); the remaining lithic clasts and minerals grains...opaque minerals such as pyrite and magnetite. The calcite displays strong and persistent twin lamellation...third is 1.4 m in the Fjacka profile in the Siljan district (NBlvak et al., 1999), -300 km to the south. We...the Chicxulub crater. The deposits at Albion Island (northern Belize), which is located 364 km from the |  | | Report (chapter) | | 2). This spherule bed is capped by a 3 mm thick orange limonite layer that was initially assumed to be...samples) Samples Depth (mbsf) Clays Quartz Calcite Dolomite 17X 02 046-048 17X 02 048-050 17X 02...to smectite. Some calcite crystals are also observed in this matrix. This calcite could be an original...could have taken place. Moreover, dolomite and calcite could have been abundant in the ejecta material...- T ejecta deposits, such as those from Albion Island, Belize, where the ejecta come from the outer portion |  | BELZA, Joke, GODERIS, Steven, KEPPENS, Eddy, VANHAECKE, Frank, CLAEYS, Philippe (2012) An emplacement mechanism for the mega-block zone within the Chicxulub crater, (YucatĂĄn, Mexico) based on chemostratigraphy. Meteoritics & Planetary Science, 47 (3) 400-413 doi:10.1111/j.1945-5100.2012.01345.x | Journal (article/letter/editorial) | | these authors to show some resemblance with the Albion Formation diamictite bed in southern Quintana Roo...procedure was applied to the samples containing both calcite and dolomite phases. First, the sample was reacted...acid at 25 C for 3 h, to liberate CO2 from the calcite phase. After quantitative isolation of this CO2...uncertainties (2 SD) for d13C are ±0.10& for the calcite phase and ±0.12& for the dolomite phase. For d18O...analytical uncertainties are ±0.20& and ±0.21& for calcite and dolomite phases, respectively. All values reported |  | | Journal (article/letter/editorial) | | of Mexico Atlantic Ocean Chicxulub o 20 Albion Island Mexico Caribbean Sea o 10 90 o o 80 ...boundary sections: Bass River, DSDP Site 603 and Albion Island. Nose, most of the plateau is covered with...mostly composed of clays and minor amounts of calcite (Table 1). Zeolites, quartz and small amounts of...the bulk sediments (clay minerals, quartz and calcite) and clay minerals in the <2 mm fraction (smectite...(n = 13) Depth (mbsf) Clay minerals Quartz Calcite Smectite Illite Kaolinite 115.02 124.05 <5 |  | | Journal (article/letter/editorial) | | breater, and exposures near the border of Yucatan and Belize; (b) Gulf of Mexico region, <2500 m from the crater...carbonate platform in Chiapas, Guatamala, and southern Belize, (d ) deep-water sites in the Gulf of Mexico and...to the Chicxulub crater, extending to northern Belize. ATLANTIC COASTAL PLAIN AND CONTINENTAL MARGIN...Guatamala, and Southern Belize The sites in Chiapas, Guatamala, and southern Belize all occur on or around...blanket/curtain sites, for example, in northern Belize and Yucatan, indicates that these blocks are not |  | Salge, T., Stosnach, H., Rosatelli, G., Hecht, L., Reimold, W. U. (2019) Evidence for shockâinduced anhydrite recrystallization and decomposition at the UNAMâ7 drill core from the Chicxulub impact structure. Meteoritics & Planetary Science, 54 (10) 2334-2356 doi:10.1111/maps.13283 | Journal (article/letter/editorial) | | anhydrite, dolomite, and calcite, with minor celestine and feldspars. Calcite-dominated inclusions in...of these components. Vesicular and spherulitic calcite particles may indicate quenching of carbonate melts...Claeys et al. 2003; Osinski et al. 2008), and calcite crystallization by the exothermic back-reaction...Ejecta deposits at the K-Pg boundary reveal that calcite is a common constituent of the Chicxulub impact...between silicic and calcium carbonate components. Calcite inclusions in silicate melt show an equilibrium |  | | Report (issue) | | Department of Geology University of Rhode Island Kingston, Rhode Island 02881 and Stefan Gartner Department...Deposits of the Chicxulub Crater from .4lbion Island, Belize ................ 75 Adriana C. Ocampo, Kevin...Institute David Fastovsky, University of Rhode Island Stefan Ga1tner, Texas A&M University ' âą Geological...taceous/earliest Tertiary transition on Seymour Island, Antarctica: Journal of Paleontology. v. 63, p...Miocene DSDP Site 588B, South Pacific 15 Anticosti Island, Canada Scotland China See Orth, 1989 China Ganapathy |  | Takayama, H, Tada, R, Matsui, T, Iturralde-Vinent, M.A, Oji, T, Tajika, E, Kiyokawa, S, Garcia, D, Okada, H, Hasegawa, T, Toyoda, K (2000) Origin of the Peñalver Formation in northwestern Cuba and its relation to K/T boundary impact event. Sedimentary Geology, 135 (1) 295-320 doi:10.1016/s0037-0738(00)00079-8 | Journal (article/letter/editorial) | | Northern ophiolitic melange, (4) the Cretaceous island-arc, and (5) the Paleogene volcanic arc of southeastern...Arc. In the studied area (Fig. 1), the Cretaceous island-arc is composed of extrusive and volcaniclastic...northwestern part of the allochthonous Cretaceous island-arc unit. According to BroÌnnimann and Rigassi...located 400â500 km to the south of the present Cuban island according to Rosencrantz (1990) (Fig. 3). The Rosario...PenÌalver Formation is well exposed in an abandoned quarry about 100 m to the east of the type locality (BroÌnnimann |  | CLAEYS, Philippe, HEUSCHKEL, Sabine, LOUNEJEVA-BATURINA, Elena, SANCHEZ-RUBIO, Gerardo, STĂFFLER, Dieter (2003) The suevite of drill hole YucatĂ n 6 in the Chicxulub impact crater. Meteoritics & Planetary Science, 38 (9) 1299-1317 doi:10.1111/j.1945-5100.2003.tb00315.x | Journal (article/letter/editorial) | | the heterogeneity of the deep YucatĂ n basement. Calcite with characteristic feathery texture indicates...Chicxulub suevite contains an unusual fine-grained calcite matrix. Suevite is, by definition, an impactite...porous, 10 micron-size matrix composed mainly of calcite, feldspar, and quartz (Nucleo [N] 13: 1100â 1103...(grain size 10â 15 ”m) contains small crystals of calcite (25%), plagioclase (30%), quartz (30%), K-feldspar...composed of single, often angular-shaped sparry calcite crystals (Fig. 3a). They form about 25% of all |  | | Journal (article/letter/editorial) | | that the groundmass of these impactites comprises calcite, silicate impact-melt glass, and anhydrite, which...field photograph of the east wall of the AumĂŒhle quarry near the northern rim of the Ries impact structure...analytical data and microtextures indicate that calcite, silicate glass, francolite (carbonate-hydroxy-fluor-apatite)...not applicable. Groundmass/matrix Mineralogy Calcite Dolomite Anhydrite Silicate glass Other Clastic...the continuous ejecta blanket has been termed the Albion Formation and comprises a basal spheroid bed and |  | | Book | | over a western ocean, painting the clouds with orange and red and yellow and gold, on the last evening...quietly dreams of centu- I never tire re- of walk- looking at the medieval buildings. The book written...about 45 ° insula. In this case the particles are calcite (calcium carbonate, or mostly grains of the mineral...totally new directions, and by the time I finished my walk, I had ery. work on I would try to solve it....health problem kept him from being the And first walk on the Moon. Gene might have expected that uniformitarian |  | | Journal (article/letter/editorial) | | present as interstitial fillings between euhedral calcite and dolomite crystals that may have grown in the...similarities with the Albion formation diamictite bed found in southern Quintana Roo and Belize (Ocampo et al...blanket deposits of the Chicxulub crater from Albion island, Belize. In The Cretaceous-Tertiary event and other...Claeys P. 1999. Chicxulub impact ejecta from Albion island, Belize. Earth and Planetary Science Letters 170:351â364 |  | Mahboubi, A., Moussavi-Harami, R., Carpenter, S. J., Aghaei, A., Collins, L. B. (2010) Petrographical and geochemical evidences for paragenetic sequence interpretation of diagenesis in mixed siliciclasticâcarbonate sediments: Mozduran Formation (Upper Jurassic), south of Agh-Darband, NE Iran. Carbonates and Evaporites, 25 (3) 231-246 doi:10.1007/s13146-010-0028-z | Journal (article/letter/editorial) | | indicates redox conditions during precipitation of calcite cement. Keywords Jurassic Diagenesis Carbonate...microscopemounted dental drill was used to extract calcite powder from polished specimens. About 0.2 mg of...calcium carbonate with low nucleation rate of calcite crystals and low growth rate. This condition can...granular calcite cements (b) in grainstone. Fracture filling in carbonate grains with sparry calcite cement...cement. C Coarse crystalline blocky calcite. D Poikilotopic cement in ooid grainstone. E Syntaxial cement |  | Stinnesbeck, W., Keller, G., Cruz, J. de la, LeĂłn, C. de, MacLeod, N., Whittaker, J. E. (1997) The CretaceousÂTertiary transition in Guatemala: limestone breccia deposits from the South PetĂ©n basin. Geologische Rundschau, 86 (3) 686-709 doi:10.1007/s005310050171 | Journal (article/letter/editorial) | | breccia deposits in southern Mexico, Guatemala and Belize have recently been interpreted as proximal to distal...direction from the Guatemala/Mexico border to southern Belize. In four of the five sections examined, a breccia...deposits in southern Mexico (Chiapas), Guatemala, Belize and northeastern Brazil have recently been interpreted...sections with limestone breccia deposits in Guatemala, Belize and southern Mexico (Chiapas). Circle illustrates...northwards and westwards into Mexico and onshore Belize. To the south the PeteÌn basin is bordered by the |  | Wittmann, A., Kenkmann, T., Schmitt, R. T., Hecht, L., Stöffler, D. (2004) Impact-related dike breccia lithologies in the ICDP drill core Yaxcopoil-1, Chicxulub impact structure, Mexico. Meteoritics & Planetary Science, 39 (6) 931-954 doi:10.1111/j.1945-5100.2004.tb00938.x | Journal (article/letter/editorial) | | Fe3+ (Machel 2000). CL in calcite has been described as characteristically orange to yellow, while dolomite...checked by SEM-EDX to distinguish dolomite and calcite. Quantitative chemical data was produced by electron...light. It is composed of micritic to microsparitic calcite grains. Sometimes, anhedral to euhedral limestone... An earlier generation of brown, fine-grained calcite veins with flow textures displays a reaction rim...20 ”m-diameter pores. Coarser-grained sparitic calcite veins of light color form a superimposed, cross-cutting |  | KELLER, Gerta, ADATTE, Thierry, STINNESBECK, Wolfgang, STĂŒBEN, Doris, BERNER, Zsolt, KRAMAR, Utz, HARTING, Markus (2004) More evidence that the Chicxulub impact predates the K/T mass extinction. Meteoritics & Planetary Science, 39 (7) 1127-1144 doi:10.1111/j.1945-5100.2004.tb01133.x | Journal (article/letter/editorial) | | authors in the southern USA, Mexico, Guatemala, and Belize; b) localities studied on YucatĂĄn within and outside...glass spherule deposits in Haiti, Guatemala, and Belize (Fig. 1) were found interbedded in early Danian...and spheroid layers at Albion Island, Armenia, Santa Theresa and San Jose in Belize, Actela in Guatemala...test calcite is preserved versus the amount that was recrystallized. The foraminiferal calcite will be...of this method is that when foraminiferal test calcite is completely diagenetically altered and recrystallized |  | | Journal (article/letter/editorial) | | calcium carbonate in composition (e.g. aragonite, calcite, dolomite), with dolomite found mostly in association...staining by alizarin red S to differentiate between calcite and dolomite (Dickson, 1966). Cement morphology...micrite to sparry calcite, microgranule texture Clots texture, ïŹne to medium equant calcite cement Grain supported...algae with fully replaced internal structure by calcite Mud-supported, micrite, ostracods, tentaculites...Stromatoporoid, micrite ïŹlling within the framework, calcite replacement on the internal structure Grain supported |  | Schulte, P., Deutsch, A., Salge, T., Berndt, J., Kontny, A., MacLeod, K.G., Neuser, R.D., Krumm, S. (2009) A dual-layer Chicxulub ejecta sequence with shocked carbonates from the CretaceousâPaleogene (KâPg) boundary, Demerara Rise, western Atlantic. Geochimica et Cosmochimica Acta, 73 (4) 1180-1204 doi:10.1016/j.gca.2008.11.011 | Journal (article/letter/editorial) | | causing fast back-reaction with CO2 to reform calcite (Agrinier et al., 2001). Consequently, the amount...sites has been restricted to the presence of few calcite and dolomite clasts (ODP Leg 171 and 174; Norris...The most exciting discovery is the presence of calcite and dolomite clasts next to shocked tectosilicates...Danian claystone above. Note that the occurrence of calcite and dolomite is clearly restricted to the uppermost...The matrix consists of phyllosilicates whereas calcite cements are totally lacking. Disseminated pyrite |  | | Journal (article/letter/editorial) | | structure). The compositions of quartz, K-feldspar, calcite, biotite, and chlorite minerals are similar to...grained than outer zones. The relative abundances of calcite, phyllosilicates, and feldspars are similar in...are texturally layered, with quartz, K-feldspar, calcite, and various phyllosilicates present in nearhomogeneous...with less common similarly sized feldspar and calcite grains. The large grains are rarely found outside...grains of quartz, phyllosilicates, feldspar, and calcite. Note that the lapillus does not have concentric |  | Stöffler, Dieter, Artemieva, Natalya A., Ivanov, Boris A., Hecht, Lutz, Kenkmann, Thomas, Schmitt, Ralf Thomas, Tagle, Roald Alberto, Wittmann, Axel (2004) Origin and emplacement of the impact formations at Chicxulub, Mexico, as revealed by the ICDP deep drilling at Yaxcopoil-1 and by numerical modeling. Meteoritics & Planetary Science, 39 (7) 1035-1067 doi:10.1111/j.1945-5100.2004.tb01128.x | Journal (article/letter/editorial) | | a distance of some 1000 km in southern Mexico, Belize, and Guatemala (Claeys et al. 2002). These deposits...and Lauson 1972). We use input parameters for calcite, granite, and dunite (Pierazzo et al. 1997) to...target consists of a 3 kmthick sedimentary layer (calcite EOS), a 30 km-thick crystalline basement (granite...K-feldspar, quartz, pyroxene, sheet silicates, and calcite (Hecht et al. 2004). Different types of silicate...brecciated impact melt rock unit, is calcite-rich, and it appears that calcite has replaced a primary clastic |
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