Glauconite, as a K-rich authigenic phyllosilicate, is an ideal specimen to obtain the isotopic age of sedimentary rock by means of K-Ar isotopic determination, especially in the application of ancient sedimentary rock...Glauconite, as a K-rich authigenic phyllosilicate, is an ideal specimen to obtain the isotopic age of sedimentary rock by means of K-Ar isotopic determination, especially in the application of ancient sedimentary rocks, because of its simultaneous formation with sediments. As for the glauconite in recent marine sediments, there have been also reports on the isotopic age which appears to range from 2 to 70 Myr. It seems that glauconite was terrigenous-allogenic, i.e. it was eroded展开更多
Since the Late Quaternary, eustatism has undergone great changes in the coastal area of eastern China. Sunk paleo-channels have been discovered in some regions at sea bottom of the China Sea. As a result of unequilibr...Since the Late Quaternary, eustatism has undergone great changes in the coastal area of eastern China. Sunk paleo-channels have been discovered in some regions at sea bottom of the China Sea. As a result of unequilibrium of sediment processes,展开更多
文摘Glauconite, as a K-rich authigenic phyllosilicate, is an ideal specimen to obtain the isotopic age of sedimentary rock by means of K-Ar isotopic determination, especially in the application of ancient sedimentary rocks, because of its simultaneous formation with sediments. As for the glauconite in recent marine sediments, there have been also reports on the isotopic age which appears to range from 2 to 70 Myr. It seems that glauconite was terrigenous-allogenic, i.e. it was eroded
文摘Since the Late Quaternary, eustatism has undergone great changes in the coastal area of eastern China. Sunk paleo-channels have been discovered in some regions at sea bottom of the China Sea. As a result of unequilibrium of sediment processes,
