scholarly journals The Habitat of the Nascent Chicxulub Crater

AGU Advances ◽  
2020 ◽  
Vol 1 (4) ◽  
Author(s):  
T. J. Bralower ◽  
J. Cosmidis ◽  
M. S. Fantle ◽  
C. M. Lowery ◽  
B. H. Passey ◽  
...  
Keyword(s):  
Chicxulub Crater

PROBING A POST-IMPACT HYDROTHERMAL SYSTEM IN THE CHICXULUB CRATER WITH CORE RECOVERED BY IODP-ICDP EXPEDITION 364

2017 ◽  
Author(s):  
David A. Kring ◽  
◽  
Martin Schmieder ◽  
Ulrich Riller ◽  
Sarah L. Simpson ◽  
...  
Keyword(s):  
Hydrothermal System ◽  
Post Impact ◽  
Chicxulub Crater

Coeval 40Ar/39Ar Ages of 65.0 Million Years Ago from Chicxulub Crater Melt Rock and Cretaceous-Tertiary Boundary Tektites

Science ◽  
1992 ◽  
Vol 257 (5072) ◽  
pp. 954-958 ◽  
Author(s):  
C. C. Swisher ◽  
J. M. Grajales-Nishimura ◽  
A. Montanari ◽  
S. V. Margolis ◽  
P. Claeys ◽  
...  
Keyword(s):  
Chicxulub Crater

Study of fluid circulation through the chicxulub crater using Rock-Eval pyrolysis and fluid inclusions

2022 ◽  
pp. 105194
Author(s):  
L. Hernandez-Terrones ◽  
L. Martínez ◽  
J. Szamotulski ◽  
E. González-Partida ◽  
J.V. Morgan ◽  
...  
Keyword(s):  
Fluid Inclusions ◽  
Fluid Circulation ◽  
Chicxulub Crater ◽  
Rock Eval

U–Pb ages of single shocked zircons linking distal K/T ejecta to the Chicxulub crater

Nature ◽  
1993 ◽  
Vol 366 (6457) ◽  
pp. 731-734 ◽  
Author(s):  
Thomas E. Krogh ◽  
Sandra L. Kamo ◽  
Virgil L. Sharpton ◽  
Luis E. Marin ◽  
Alan R. Hildebrands
Keyword(s):  
Chicxulub Crater

Rock Magnetic and Magnetostratigraphic Study of Chicxulub Crater Impact Breccias and Post-Impact Carbonates in the Yaxcopoil-1 and Santa Elena Boreholes

2020 ◽  
Author(s):  
Jaime Urrutia-Fucugauchi ◽  
Ligia Perez-Cruz ◽  
Elia Escobar-Sanchez ◽  
Miriam Velasco-Villarreal ◽  
Edgar Garcia-Garnica
Keyword(s):  
Oxygen Isotope ◽  
Carbonate Platform ◽  
Magnetic Hysteresis ◽  
Magnetization Vector ◽  
Carbonate Sediments ◽  
Carbon And Oxygen Isotope ◽  
Post Impact ◽  
Chicxulub Crater ◽  
The Impact ◽  
Santa Elena

<p>Chicxulub crater was formed ~66 Ma ago by an asteroid impact at the Cretaceous/Paleogene (K/Pg) boundary on the Yucatan carbonate platform in the southern Gulf of Mexico. The crater is the youngest and best preserved of the three large impact basins, with a ~200 km diameter and multi-ring and peak ring morphology. The crater, covered by post-impact carbonate sediments with thickness up to ~1.1 km, has been investigated by geophysical studies and drilling programs. Initial drilling in Yucatan was carried out by the Pemex oil company, followed by the National University UNAM Chicxulub program, the ICDP Yaxcopoil-1 project and the IODP-ICDP Expedition 364 marine drilling. Here, results of combined paleomagnetic, rock magnetic, petrographic and geochemical studies are used to characterize the sequence and constrain the unit’s emplacement and crater formation. We analyze core samples of suevitic breccias and Paleogene carbonates from the Yaxcopoil-1 and Santa Elena boreholes drilled in the southern sector, inside and to the south of the crater rim marked by the ring of cenotes.  Magnetic hysteresis, low-field susceptibility and coercitivity analyses indicate that main carriers are titanomagnetites and magnetite. Mineralogical and magnetic properties indicate effects of hydrothermal alteration, associated with the high temperature system generated by the impact. Higher coercitivity minerals are also observed in some samples. In the carbonate sections, hydrothermal effects as marked by the geochemical logs decrease upwards from the breccia-carbonate contact. Alternating field and thermal demagnetization is used to investigate the magnetization vector composition and isolate the characteristic remanent components. Magnetic polarities defined from the inclination data show a sequence of reverse to normal, which correlate to polarity chrons 29r to 26r, with impact occurring within 29r chron.  The correlations of the magnetostratigraphy and stable isotopes indicate a hiatus at the basal Paleocene section. In Santa Elena cores, d<sup>13</sup>C values range from 1.2 to 3.5%<sub>0 </sub>and d<sup>18</sup>O values range from -1.4 to -4.8%<sub>0, </sub>with variation trends correlating with the marine carbon and oxygen isotope records for the late Maastrichtian and early Paleocene. The positive carbon isotopes indicate high productivity after the K/Pg extinction event, while the oxygen isotope values are more negative reflecting regional and local effects. Silica contents decrease from high in the suevites to low values in carbonates showing higher variability and then increased contents at the Paleocene-Eocene Thermal Maximum (PETM). The geochemical trends correlate in other elements including iron, titanium, potassium and aluminum that record impact-induced hydrothermal effects and possibly changing depositional conditions. Ca shows an opposite trend, with lower values in the upper suevitic breccias, higher values in the Paleocene carbonates and lower values in the PETM.</p>

Seismic stratigraphic evidence of a pre-impact basin in the Yucatán Platform: Morphology of the Chicxulub crater and K/Pg boundary deposits

2021 ◽  
pp. 106594
Author(s):  
E. Guzmán-Hidalgo ◽  
J.M. Grajales-Nishimura ◽  
G.P. Eberli ◽  
J.E. Aguayo-Camargo ◽  
J. Urrutia-Fucugauchi ◽  
...  
Keyword(s):  
Chicxulub Crater

scholarly journals Yucatán karst features and the size of Chicxulub crater

1996 ◽  
Vol 127 (3) ◽  
pp. F11-F14 ◽  
Author(s):  
Martin Connors ◽  
Alan R. Hildebrand ◽  
Mark Pilkington ◽  
Carlos Ortiz-Aleman ◽  
Rene E. Chavez ◽  
...  
Keyword(s):  
Chicxulub Crater

scholarly journals Spherules associated with the cretaceous–paleogene boundary in Poland

2014 ◽  
Vol 64 (1) ◽  
pp. 110-119 ◽  
Author(s):  
Tomasz Brachaniec ◽  
Łukasz Karwowski ◽  
Krzysztof Szopa
Keyword(s):  
Clay Fraction ◽  
South Eastern ◽  
Chicxulub Crater ◽  
Impact Glass ◽  
The Impact ◽  
Impact Origin

Abstract The succession of the Lechówka section near Chełm in south-eastern Poland presents the first complete record of the Cretaceous-Paleogene (K-Pg) boundary in Poland. Samples of the boundary clay were examined for microtektites and shocked minerals to confirm the impact origin of the sediment. The spheroidal fraction reveals morphological and mineralogical features, e.g., spherules, similar to material from the K-Pg boundary as described from elsewhere. The impact genesis of the spherules is confirmed by the presence of nickel-rich spinel grains on their surfaces. The spinels are considered to be primary microlites and, thus, the spherules at Lechówka can be classified as microkrystites. No shocked minerals were noted. The deposits with spherules comprise Aland Mg-rich smectite (Cheto smectite). This almost pure Mg-rich smectite, forming up to 100% of the clay fraction, derived from the weathering of the impact glass. It is proposed that the spherules isolated from the Cretaceous- Paleogene boundary clay at Lechówka come from the Chicxulub crater in Mexico.

Dynamic modeling suggests terrace zone asymmetry in the Chicxulub crater is caused by target heterogeneity

2008 ◽  
Vol 270 (3-4) ◽  
pp. 221-230 ◽  
Author(s):  
Gareth S. Collins ◽  
Joanna Morgan ◽  
Penny Barton ◽  
Gail L. Christeson ◽  
Sean Gulick ◽  
...  
Keyword(s):  
Dynamic Modeling ◽  
Chicxulub Crater
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