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SHRIMP U-Pb zircon age of the Jinbaoshan ultramafic intrusion, Yunnan Province, SW China.
- Source :
- Chinese Science Bulletin; Jan2009, Vol. 54 Issue 1, p168-172, 5p, 1 Black and White Photograph, 1 Chart, 2 Graphs
- Publication Year :
- 2009
-
Abstract
- SHRIMP U-Pb zircon dating gives ages of 260.6 ± 3.5 Ma and 260.7 ± 5.6 Ma for serpentinised wehrlite and plag-hornblendite in the Jinbaoshan ultramafic intrusion, respectively. The results indicate that the Jinbaoshan intrusion was emplaced at ca.260 Ma and contemporaneous with the Emeishan continental flood basalts (ECFB), similar to other maficultramafic intrusions of the Emeishan large igneous province (LIP). The new ages provide a geochronological constraint on the origin of the Jinbaoshan ultramafic intrusion. It confirms that the Jinbaoshan ultramafic intrusion belongs to the Emeishan LIP that formed at ca. 260 Ma. [ABSTRACT FROM AUTHOR]
- Subjects :
- ZIRCON
GEMS & precious stones
ULTRABASIC rocks
IGNEOUS intrusions
Subjects
Details
- Language :
- English
- ISSN :
- 10016538
- Volume :
- 54
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Chinese Science Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 36947418
- Full Text :
- https://doi.org/10.1007/s11434-008-0488-x