搜索结果: 1-3 共查到“同位素地质年代学 Constraints”相关记录3条 . 查询时间(0.125 秒)
Two Types of Granites in the Western Yangtze Block and Their Implications for Regional Tectonic Evolution: Constraints from Geochemistry and Isotopic Data
I-type granite S-type granite geochemistry petrogenesis tectonic setting Western Yangtze Block
2018/4/10
In the western Yangtze Block, widespread Mesoproterozoic to Neoproterozoic rocks are the key to understanding the Precambrian tectonic-magmatic evolution of the region. However, their petrogenesis and...
The I-Xe chronometer and its constraints on the accretion and evolution of planetesimals
extinct radioisotopes iodine-xenon chondrites early solar system chronology
2017/4/10
We report a –1.6 ± 2.6 Myr (1s error) I-Xe age of the ungrouped achondrite NWA 7325 relative to the Shallowater
standard. We re-evaluate the calibration of the relative I-Xe dating system against the...
U–Pb zircon age, geochemical, and Sr–Nd isotopic constraints on the age and origin of granodiorite porphyries in the Guilong area, southern Yunnan Province, South China
granodiorite porphyries U–Pb age-dating origin southern Yunnan Province South China
2017/4/11
Associated with several important polymetallic mineral deposits, the origin of the investigated Guilong area granodiorite
porphyries (southern Yunnan Province) are presently poorly understood. For th...