Objective The nearly parallel N-S-trending rifts in southern Tibet represent the E-W extension of the Tibet Plateau. Most data which constrained the age of the extensional deformation come from isotopic dating of the...Objective The nearly parallel N-S-trending rifts in southern Tibet represent the E-W extension of the Tibet Plateau. Most data which constrained the age of the extensional deformation come from isotopic dating of the dikes probably related to the activity of the nearly N-S faulting and micas from hydrothermal activity and the low- temperature thermochronology of plateau uplift. Previous research shows that there are at least three different ideas about the age of the rifts： （1） older than 16-12 Ma, （2） 14- 10 Ma, and （3） 8-4 Ma （Fig. la）. For the old sedimentary strata represented the beginning of the rifting, the dating of the sediments helps to better define the initial rifting age.展开更多
We report the high-sensitivity holographic storage in Ce-doped SBN with a low power CW He-Ne laser.A maximum index changeΔnmax=1.07x10-4 a photorefractive sensitivity S=7.9 x10-4 cm2/J,and a maximum diffraction effic...We report the high-sensitivity holographic storage in Ce-doped SBN with a low power CW He-Ne laser.A maximum index changeΔnmax=1.07x10-4 a photorefractive sensitivity S=7.9 x10-4 cm2/J,and a maximum diffraction efficiencyη=78%were obtained.The optical readout characteristics of holograms recorded by the sample were also studied.展开更多
基金supported by the National Natural Science Foundation of China(grant No.41571013)Project of China Geological Survey(grant No.12120114002101)
文摘Objective The nearly parallel N-S-trending rifts in southern Tibet represent the E-W extension of the Tibet Plateau. Most data which constrained the age of the extensional deformation come from isotopic dating of the dikes probably related to the activity of the nearly N-S faulting and micas from hydrothermal activity and the low- temperature thermochronology of plateau uplift. Previous research shows that there are at least three different ideas about the age of the rifts： （1） older than 16-12 Ma, （2） 14- 10 Ma, and （3） 8-4 Ma （Fig. la）. For the old sedimentary strata represented the beginning of the rifting, the dating of the sediments helps to better define the initial rifting age.
文摘We report the high-sensitivity holographic storage in Ce-doped SBN with a low power CW He-Ne laser.A maximum index changeΔnmax=1.07x10-4 a photorefractive sensitivity S=7.9 x10-4 cm2/J,and a maximum diffraction efficiencyη=78%were obtained.The optical readout characteristics of holograms recorded by the sample were also studied.
