MICROTEKTITES, MICROKRYSTITES, AND SPINELS FROM A LATE PLIOCENE ASTEROID IMPACT IN THE SOUTHERN-OCEAN

被引：67

作者：

MARGOLIS, SV ^{[1
]}

CLAEYS, P ^{[1
]}

KYTE, FT ^{[1
]}

机构：

[1] UNIV CALIF LOS ANGELES,INST GEOPHYS & PLANETARY PHYS,LOS ANGELES,CA 90024

来源：

SCIENCE | 1991年 / 251卷 / 5001期

关键词：

D O I：

10.1126/science.251.5001.1594

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：

The properties of glassy spherules found in sedimentary deposits of a late Pliocene asteroid impact into the southeast Pacific are similar to those of both microtektites and microkrystites. These spherules probably formed from molten silicate droplets that condensed from an impact-generated vapor cloud. The spherules contain inclusions of magnesioferrite spinels similar to those in spherules found at the Cretaceous-Tertiary boundary, indicating that both sets of spherules are impact debris formed under similar physical and chemical conditions.

引用

页码：1594 / 1597

页数：4

共 20 条

[1]

BOHOR BF, 1986, EARTH PLANET SC LETT, V81, P51

[2]

DOEHNE E, IN PRESS GEOL SOC AM

[3]

GLASS BP, 1974, GEOL SOC AM BULL, V85, P1305, DOI 10.1130/0016-7606(1974)85<1305:MSS>2.0.CO

[4]

[5]

GLASS BP, 1988, P LUNAR PLANET SCI C, V18, P455

[6]

Haggerty S.E., 1976, OXIDE MINERALS MINER, V3, P101

[7]

Irvine T.N., 1965, CAN J EARTH SCI, V2, P648, DOI [DOI 10.1139/E65-046, 10.1139/e65-046]

[8]

IZETT GA, 1987, GEOL SOC AM BULL, V99, P78, DOI 10.1130/0016-7606(1987)99<78:ASIKBS>2.0.CO

[9]

[10] NEW EVIDENCE ON THE SIZE AND POSSIBLE EFFECTS OF A LATE PLIOCENE OCEANIC ASTEROID IMPACT [J].

KYTE, FT ;

ZHOU, L ;

WASSON, JT .

SCIENCE, 1988, 241 (4861) :63-65

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