Gauss’s theorem, mass deficiency at Chicxulub crater (Yucatan, Mexico), and the extinction of the dinosaurs

Author:

Campos‐Enriquez J. O.1,Morales‐Rodrguez H. F.2,Domnguez‐Mendez F.2,Birch F. S.3

Affiliation:

1. Instituto de Geofsica, UNAM, Delegación Coyoacán, 04510 México D.F., Mexico.

2. IPN-ESIA-Ticomán, Ciencias de la Tierra, México D.F., Mexico. Emails:

3. University of New Hampshire, College of Engineering and Physical Sciences, Department of Earth Sciences, James Hall, 56 College Road, Durham, New Hampshire 03824-3589.

Abstract

Using Gauss’s theorem, we estimated the mass deficiencies of the Chicxulub impact structure (Yucatan, Mexico) from its gravity anomaly. The mass deficiency obtained from the residual gravity anomaly map ranges between 1.06 × 1016and 1.67 × 1016kg. Because the gravity anomaly has approximately radial symmetry, we also estimated the mass deficiency from selected profiles. In this way, we obtained slightly lower mass deficiency (6.16 × 1015to 1.35 × 1016kg). The central gravity high, which is supposed to be associated with the central structural high, has a mean excess mass of 1.93 × 1014kg. By assuming a mean density contrast of 100 kg/m3between the country rock and the sedimentary and brecciated rocks, we estimated the equivalent total mass (1.60 × 1017to 4.34 × 1017kg) and volume (6.16 × 1013to 1.67 × 1014m3) of breccias and sedimentary rocks responsible for the gravity anomaly. These figures represent lower bounds on the mass and volume ejected from the impact crater. They represent estimates made from geophysical principles and data, and compare well with independent estimates based on other principles such as scaling relations. According to actual estimations of the sulfur dioxide mass generated by the Cretaceous‐Tertiary impact and our results, only a small fraction (about 1%) of the anhydrite in the target strata was vaporized.

Publisher

Society of Exploration Geophysicists

Subject

Geochemistry and Petrology,Geophysics

Reference53 articles.

1. Extraterrestrial Cause for the Cretaceous-Tertiary Extinction

2. Barlow, B. C., 1979, Gravity investigations of the Gosses Bluff impact structure, central Australia, Bur. Min. Res. Austral. J. Geol. Geophys.4, 323–339.

3. Isotopic comparison of K/T boundary impact glass with melt rock from the Chicxulub and Manson impact structures

4. The Cretaceous-Tertiary extinction: A lethal mechanism involving anhydrite target rocks

5. Camargo‐Zanoguera, A., and Suárez‐Reynoso, G., 1994, Evidencia sı´smica del cráter de impacto de Chicxulub, Boletı´n de la Asociación Mexicana de Geofı´sicos de Exploración:34, 1–28.

Cited by 12 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Mass-constrained basin basement mapping;GEOPHYSICS;2021-04-21

2. Impact‐Induced Porosity and Microfracturing at the Chicxulub Impact Structure;Journal of Geophysical Research: Planets;2019-07

3. Gravity;Geophysics and Geosequestration;2019-04-30

4. Heat flow pattern at the Chicxulub impact crater, northern Yucatan, Mexico;Journal of Volcanology and Geothermal Research;2016-02

5. Multiscale estimation of excess mass from gravity data;Geophysical Journal International;2014-04-12

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3