Microtektites from DSDP Site 573 in East Pacific

Author(s): Yin Yanhong; Wan Tianfeng; Sun Jiashi
Author Affiliation(s): Primary:
Qingdao Institute of Marine Geology, Qingdao, China
Other:
Chinese University of Geosciences, China
Volume Title: Haiyang Dizhi yu Disiji Dizhi Marine Geology & Quaternary Geology
Source: Haiyang Dizhi yu Disiji Dizhi = Marine Geology & Quaternary Geology, 21(4), p.37-42. Publisher: Science Press, Beijing, China. ISSN: 0256-1492
Note: In Chinese with English summary. 22 refs.; illus., incl. 2 tables
Summary: During the study of samples of late Eocene to early Oligocene strata at DSDP Site 573, microtektites were discovered in the layer of metalliferous claystone around the boundary between the late Eocene and the early Oligocene. The microtektites were more abundant at the bottom of the metalliferous claystone with a hole depth of 525.00-526.00 m than in any other part of the hole. At most, 12 microtektite grains were found in a 5-gram sample. The microtektites are black in color, and spherical, ellipsoid or droplet-like in shape. They vary mainly from 0.063 mm to 0.3 mm in size. The chemical composition of these microtektite was researched by EPMA. Their chemical composition has a large range which may be caused by the variable chemical composition of the impact rock. The research shows that the microtektite-strewn field was formed by meteorite impact, and the strewn field's trend may indicate the direction of the impact.
Year of Publication: 2001
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 05 Petrology, Igneous and Metamorphic; Cenozoic; DSDP Site 573; Deep Sea Drilling Project; East Pacific; Eocene; IPOD; Impacts; Leg 85; Lower Oligocene; Meteorites; Microtektites; Oligocene; Pacific Ocean; Paleogene; Stratigraphic boundary; Tektites; Tertiary; Upper Eocene
Coordinates: N002954 N002955 W1331834 W1331835
Record ID: 2009024629
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by National Geological Library, Beijing, China