n.等時(shí)線(瞬壓曲線)

Studies of isochron luminescence dating with sand-sized grains. 粗顆粒的等時(shí)線釋光方法研究。

The same samples were also dated by mineral Rb-Sr isochron method. 結(jié)果表明，花崗巖和片麻巖礦物的氧同位素溫度大小順序?yàn)椋航情W石>磁鐵礦>榍石>石英>黑云母>長(zhǎng)石，遵循緩慢冷卻條件下擴(kuò)散控制的氧同位素交換封閉順序，指示這些巖石沒有受到后期熱液蝕變的擾動(dòng)。

It concludes with a discussion on the scientific validity of isochron dating. 這里包括許多等時(shí)線測(cè)年的科學(xué)有效性討論。

Its age determined by Rb-Sr isochron is 306 Ma, suggesting that it was formed at Hercynian. 據(jù)Rb-Sr等時(shí)線測(cè)定,其年令值為306Ma,說明它形成于海西期。

Through K-Ar isotope age study in pillow basalt,has gained the isochrone age is 139Ma.The age is the formation age of pillow basalt. 在枕狀玄武巖中獲得K-Ar（全巖）同位素年齡為139Ma（測(cè)試單位：宜昌地質(zhì)礦產(chǎn)所同位素室），因此確定其時(shí)代為晚侏羅世晚期。