Journal
SCIENCE IN CHINA SERIES D-EARTH SCIENCES
Volume 43, Issue 2, Pages 200-207Publisher
SCIENCE PRESS
DOI: 10.1007/BF02878150
Keywords
spilite-keratophyre formation; isotope geochronology; Cambrian; Dapingzhang; Yunnan
Categories
Ask authors/readers for more resources
On the basis of the geological field investigations and isotope geochronological studies the Sm-Nd isochron age (513 Ma+/-40 Ma), Rb-Sr isochron age (511 Ma+/-8 Ma) and K-Ar age (312-317 Ma) of the Dapingzhang spilite-keratophyre formation in Yunnan Province are presented. From these geochronological data it is evidenced that this suite of volcanic rocks was formed in the Cambrian and the parent magma was derived from a depleted mantle, which was influenced by crustal contamination and/or seawater hydrothermal alteration. During the Late Carboniferous the volcanic rocks experienced relatively strong geological reworking. This study provides geochronological evidence for the occurrence of Cambrian volcanic rocks in the Sanjiang (three-river) area.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available