Dinosaur eggshells from the Cretaceous red beds of southern China were selected forelement geochemical study. The concentrations of the major elements indicates that theeggshells did not change much in their chemical ...Dinosaur eggshells from the Cretaceous red beds of southern China were selected forelement geochemical study. The concentrations of the major elements indicates that theeggshells did not change much in their chemical composition after they were formed. Variationsin the contents of trace elements and REEs imply that a palaooclimatic anomaly might occurduring Late Cretaceous.展开更多
The Cretaceous is one of the important periods of global drastic changes in geological history, and the paleoclimate and paleoenvironment in the period are now frontier research fields in geoscience. The record of the...The Cretaceous is one of the important periods of global drastic changes in geological history, and the paleoclimate and paleoenvironment in the period are now frontier research fields in geoscience. The record of the Cretaceous marine facies has been taken as a focal dissected object by 'Global Sedimentary Geological Program (GSGP)'. But the terrestrial sedimentary rocks were mainly formed in China during the Cretaceous,展开更多
Christite （TlHgAsS<sub>3</sub>）, as a thallium sulfosalt mineral and also an independent mineral of the dispersed element thallium, is extremely rare in nature. Christite was discovered as a new mineral ...Christite （TlHgAsS<sub>3</sub>）, as a thallium sulfosalt mineral and also an independent mineral of the dispersed element thallium, is extremely rare in nature. Christite was discovered as a new mineral in 1977 in the Carlin-type gold deposits, Nevada, U. S. A. by A. Radtke et al. The christite discussed in this note occurs in a high-grade Tl ore deposit, Guizhou Province and has been reported for the second time in nature.展开更多
文摘Dinosaur eggshells from the Cretaceous red beds of southern China were selected forelement geochemical study. The concentrations of the major elements indicates that theeggshells did not change much in their chemical composition after they were formed. Variationsin the contents of trace elements and REEs imply that a palaooclimatic anomaly might occurduring Late Cretaceous.
基金Project supported by the National Natural Science Foundation of China
文摘The Cretaceous is one of the important periods of global drastic changes in geological history, and the paleoclimate and paleoenvironment in the period are now frontier research fields in geoscience. The record of the Cretaceous marine facies has been taken as a focal dissected object by 'Global Sedimentary Geological Program (GSGP)'. But the terrestrial sedimentary rocks were mainly formed in China during the Cretaceous,
文摘Christite （TlHgAsS<sub>3</sub>）, as a thallium sulfosalt mineral and also an independent mineral of the dispersed element thallium, is extremely rare in nature. Christite was discovered as a new mineral in 1977 in the Carlin-type gold deposits, Nevada, U. S. A. by A. Radtke et al. The christite discussed in this note occurs in a high-grade Tl ore deposit, Guizhou Province and has been reported for the second time in nature.
