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GEOREF RECORD

Carbonate accretionary lapilli in distal deposits of the Chicxulub impact event

Thomas E. Yancey and Renald N. Guillemette
Carbonate accretionary lapilli in distal deposits of the Chicxulub impact event
Geological Society of America Bulletin (September 2008) 120 (9-10): 1105-1118

Abstract

The petrography and chemical composition of carbonate accretionary particles of Chicxulub impact origin are described from Cretaceous-Paleogene boundary deposits at Brazos River, Texas, and Bass River borehole, New Jersey. The particles consist of lapilli and lapilli fragments ranging in size from 0.05 to 0.3 cm; they are white in color, have an accretionary fabric at several scales, and are composed of micrometer-sized microspar of low-Mg calcite with an elevated sulfur content. The internal aggregate microfabric indicates that they formed by accretion of small solid particles, suggesting an origin from carbonate crystals generated within the vapor plume of the Chicxulub impact. Carbonate accretionary lapilli occur with altered glass spherules in Cretaceous-Paleogene boundary deposits at sites in Texas and northern Mexico and in the spherule layer in New Jersey, indicating that a large amount of particulate carbonate was present within the impact plume.


ISSN: 0016-7606
EISSN: 1943-2674
Coden: BUGMAF
Serial Title: Geological Society of America Bulletin
Serial Volume: 120
Serial Issue: 9-10
Title: Carbonate accretionary lapilli in distal deposits of the Chicxulub impact event
Affiliation: Texas A&M University, Department of Geology and Geophysics, College Station, TX, United States
Pages: 1105-1118
Published: 200809
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 40
Accession Number: 2008-120921
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sketch map
N39°36'42" - N39°36'42", W74°26'12" - W74°26'12"
N28°52'60" - N33°04'00", W99°54'00" - W95°24'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200846
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