Chicxulub impact crater

AccessScience ◽  
2017 ◽  
Keyword(s):  
Impact Crater ◽  
Chicxulub Impact Crater ◽  
Chicxulub Impact

POST IMPACT RECOVERY OF THE DEEP GRANITIC BIOSPHERE OF THE CHICXULUB IMPACT CRATER

2021 ◽  
Author(s):  
S.N. Quraish ◽  
K. Grice ◽  
C. Cockell ◽  
A. Holman ◽  
P. Hopper ◽  
...  
Keyword(s):  
Impact Crater ◽  
Chicxulub Impact Crater ◽  
Post Impact ◽  
Chicxulub Impact

Borehole magnetic surveys in weakly magnetic sediments (Chicxulub impact crater) versus strongly magnetic volcanics (Bathurst mining camp)

2019 ◽  
Vol 56 (5) ◽  
pp. 504-524
Author(s):  
William A. Morris ◽  
Sara-Lise Underhay ◽  
Hernan Ugalde ◽  
Bernd Milkereit
Keyword(s):  
Magnetic Property ◽  
Impact Crater ◽  
Magnetic Data ◽  
Coordinate Space ◽  
Systematic Change ◽  
Fluxgate Magnetometer ◽  
Magnetic Vector ◽  
Chicxulub Impact Crater ◽  
Bathurst Mining Camp ◽  
Chicxulub Impact

Borehole navigation surveys performed using a triaxial fluxgate magnetometer record the change in orientation of the magnetic vector versus depth. Variations in the orientation of the magnetic vector arise from either on- or off-hole magnetic sources. On-hole magnetic sources associated with magnetic property fluctuations in the immediate wall of the borehole (i.e., susceptibility) and (or) remanence polarity changes produce sharp-edged anomalies. Off-hole magnetic sources, caused by a magnetic body near, but not penetrated by, the borehole, produce broad smooth anomalies. Prior to the interpretation of borehole magnetic anomaly logs, data corrections must be applied. Data from each of the magnetic and tiltmeter sensors must be corrected for differential gain, base value offset, and nonorthogonality. By using a probe with two sets of triaxial fluxgates, it is possible to detect along hole magnetic field rotations, which compromise the borehole navigation calculations. After rotation into geographic coordinate space, borehole vector magnetic data from the Chicxulub impact crater in Mexico showed no evidence for any systematic change of magnetic property versus depth. What was originally interpreted as reversal stratigraphy has proved to be minor changes in borehole geometry. Borehole magnetic data from a borehole through the Stratmat deposit, located in the Bathurst mining camp, New Brunswick, show strong off-hole and on-hole anomalies associated with the pyrrhotite-rich ore bodies.

Palaeocene–Eocene miospores from the Chicxulub impact crater, Mexico. Part 1: spores and gymnosperm pollen

Palynology ◽  
2019 ◽  
Vol 44 (3) ◽  
pp. 473-487 ◽  
Author(s):  
Vann Smith ◽  
Sophie Warny ◽  
David M. Jarzen ◽  
Thomas Demchuk ◽  
Vivi Vajda ◽  
...  
Keyword(s):  
Impact Crater ◽  
Chicxulub Impact Crater ◽  
Chicxulub Impact

scholarly journals Geochemistry, geochronology and petrogenesis of Maya Block granitoids and dykes from the Chicxulub Impact Crater, Gulf of México: Implications for the assembly of Pangea

2020 ◽  
Vol 82 ◽  
pp. 128-150 ◽  
Author(s):  
Jiawei Zhao ◽  
Long Xiao ◽  
Sean P.S. Gulick ◽  
Joanna V. Morgan ◽  
David Kring ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Impact Crater ◽  
Chicxulub Impact Crater ◽  
Chicxulub Impact

Importance of pre-impact crustal structure for the asymmetry of the Chicxulub impact crater

2008 ◽  
Vol 1 (2) ◽  
pp. 131-135 ◽  
Author(s):  
Sean P. S. Gulick ◽  
Penny J. Barton ◽  
Gail L. Christeson ◽  
Joanna V. Morgan ◽  
Matthew McDonald ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Impact Crater ◽  
Chicxulub Impact Crater ◽  
The Asymmetry ◽  
Chicxulub Impact

Heat flow pattern at the Chicxulub impact crater, northern Yucatan, Mexico

2016 ◽  
Vol 311 ◽  
pp. 135-149 ◽  
Author(s):  
J.M. Espinosa-Cardeña ◽  
J.O. Campos-Enríquez ◽  
M. Unsworth
Keyword(s):  
Heat Flow ◽  
Flow Pattern ◽  
Impact Crater ◽  
Chicxulub Impact Crater ◽  
Chicxulub Impact

scholarly journals Vestiges of a Volcanic Arc Hidden Within Chicxulub Crater

Eos ◽  
2021 ◽  
Vol 102 ◽  
Author(s):  
Alka Tripathy-Lang
Keyword(s):  
Impact Crater ◽  
Granitic Rocks ◽  
Volcanic Arc ◽  
Middle Crust ◽  
Chicxulub Impact Crater ◽  
Chicxulub Crater ◽  
Chicxulub Impact

Scientists discovered magmatic remnants of a volcanic arc by dating granitic rocks of the middle crust excavated by, and hidden within, the Chicxulub impact crater.

scholarly journals Life and death in the Chicxulub impact crater: A record of the Paleocene-Eocene Thermal Maximum

2020 ◽  
Author(s):  
Vann Smith ◽  
Sophie Warny ◽  
Kliti Grice ◽  
Bettina Schaefer ◽  
Michael T. Whalen ◽  
...  
Keyword(s):  
Impact Crater ◽  
Fungal Spores ◽  
Sea Surface ◽  
Purple Sulfur Bacteria ◽  
Marine Biota ◽  
Sea Surface Temperatures ◽  
Surface Temperatures ◽  
Thermal Maximum ◽  
Chicxulub Impact Crater ◽  
Chicxulub Impact

Abstract. Thermal stress on the biosphere during the extreme warmth of the Paleocene-Eocene Thermal Maximum (PETM) was most severe at low latitudes, with sea surface temperatures at some localities exceeding the 35 °C at which marine organisms experience heat stress. Relatively few equivalent terrestrial sections have been identified, and the response of land plants to this extreme heat is still poorly understood. Here, we present a new PETM record from the peak ring of the Chicxulub impact crater that has been identified based on nannofossil biostratigraphy, an acme of the dinoflagellate genus Apectodinium, and a negative carbon isotope excursion. Geochemical and microfossil proxies show that the PETM is marked by elevated TEX86H-based sea surface temperatures (SSTs) averaging ~37.8 °C, an increase in terrestrial input, surface productivity, salinity stratification, and bottom water anoxia, with biomarkers for green and purple sulfur bacteria indicative of photic zone euxinia in the early part of the event. Pollen and plants spores in this core provide the first PETM floral assemblage described from México, Central America, and the northern Caribbean. The source area was a diverse coastal shrubby tropical forest, with a remarkably high abundance of fungal spores indicating humid conditions. Thus, while seafloor anoxia devastated the benthic marine biota, and dinoflagellate assemblages were heat-stressed, the terrestrial plant ecosystem thrived.

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