GEOCHRONOLOGY OF AILAOSHAN-JINSHAJING ALKALI-RICH INTRUSIVE ROCKS ANDTHEIR SR AND ND ISOTOPIC CHARACTERISTICS

Authors
ZHANG YQ XIE YW
Citation
Yq. Zhang et Yw. Xie, GEOCHRONOLOGY OF AILAOSHAN-JINSHAJING ALKALI-RICH INTRUSIVE ROCKS ANDTHEIR SR AND ND ISOTOPIC CHARACTERISTICS, SCIENCE IN CHINA SERIES D-EARTH SCIENCES, 40(5), 1997, pp. 524-529
Citations number
13
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
SCIENCE IN CHINA SERIES D-EARTH SCIENCES → ACNP
ISSN journal
10069313
Volume
40
Issue
5
Year of publication
1997
Pages
524 - 529
Database
ISI
SICI code
1006-9313(1997)40:5<524:GOAAIR>2.0.ZU;2-Q
Abstract
Twenty-nine isotopic ages, ranging from 41 to 27 Ma, are presented for the alkali-rich intrusive rocks and their coexisting alkaline volcani c reeks, lamprophyres and acidic porphyries, indicating that they are Tertiary in age. The alkali-rich intrusive rocks have Nd-143/Nd-144 ra tios from 0.512 415 to 0.512 544, and Sr-87/Sr-86 ratios from 0.705 4 td 0.706 8, suggesting that their material originates from an enriched mantle source.