A DIFFERENT PERSPECTIVE ON GLAUCONITE AS A CHRONOMETER FOR GEOLOGIC TIME SCALE STUDIES

被引：44

作者：

Obradovich, John D. ^{[1
]}

机构：

[1] US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA

来源：

PALEOCEANOGRAPHY | 1988年 / 3卷 / 06期

关键词：

D O I：

10.1029/PA003i006p00757

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

There are advocates of the use of glauconite as a chronometer for geologic time scale studies who insist that if the geohistory of the sample in question is known in detail, one can ascertain before hand that the sample will yield a radiometric result that is accurate in the geological sense. Examples are presented indicating that while some glauconite samples may yield the correct age within their assigned analytical uncertainties when compared to high-temperature minerals, others clearly do not and are too young by varying degrees. The outright acceptance of published results on glauconite can result in erroneous age estimates of various biostratigraphic levels and stage or epoch boundaries.

引用

页码：757 / 770

页数：14

共 65 条

[21]

Harris W. B., 1984, GEOL SOC AM ABSTR, V16, P143

[22]

Harris W. B., 1980, GEOL SOC AM BULL, V91, P587

[23]

Harris W. B., 1987, GEOL NOTES S C GEOL, V31, P51

[24]

Harris W. B., 1989, GEOL SOC AM IN PRESS

[25]

Harris W. B., 1982, NUMERICAL DATING STR, P593

[26]

Hazel J. E., 1982, TEXAS OSTRACODA, P127

[27]

HAZEL JE, 1984, GEOL SOC AM BULL, V95, P1040, DOI 10.1130/0016-7606(1984)95<1040:AOTCMO>2.0.CO

[28]

[29]

HESS JC, 1986, CHEM GEOL, V59, P223, DOI 10.1016/0168-9622(86)90073-4

[30]

JEANS CV, 1982, CLAY MINER, V17, P105, DOI 10.1180/claymin.1982.017.1.10

← 1 2 3 4 5 6 7 →