GLASS FROM THE CRETACEOUS TERTIARY BOUNDARY IN HAITI

被引：169

作者：

SIGURDSSON, H

DHONDT, S

ARTHUR, MA

BRALOWER, TJ

ZACHOS, JC

VANFOSSEN, M

CHANNELL, JET

机构：

[1] UNIV N CAROLINA, CHAPEL HILL, NC 27599 USA

[2] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA

[3] UNIV FLORIDA, GAINESVILLE, FL 32611 USA

来源：

NATURE | 1991年 / 349卷 / 6309期

关键词：

D O I：

10.1038/349482a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Tektite-like glasses preserved at the Cretaceous/Tertiary boundary at Beloc in Haiti provide clear evidence of an impact event. The glass composition suggests that the impact occurred on a continental shelf region, generating a silica-rich glass with chemical composition that reflects the melting of continental crustal rocks, and a calcium-rich glass produced by the fusion of marl sediments. These findings indicate that catastrophic release to the atmosphere of 10(15) moles of CO2 from vaporized marl occurred during the impact.

引用

页码：482 / 487

页数：6

共 47 条

[11] RB-SR, SM-ND, K-CA, O, AND H ISOTOPIC STUDY OF CRETACEOUS-TERTIARY BOUNDARY SEDIMENTS, CARAVACA, SPAIN - EVIDENCE FOR AN OCEANIC IMPACT SITE [J].