絕對年代法

通過礦物或岩石的放射性同位素的測定，依據放射性元素蛻變規律計算其絕對年齡，即距今天的年數。

基本介紹

• 中文名：絕對年代法
• 外文名：The method of absolute dating
• 性質：科學
• 類別：化學

解釋

絕對年代法：通過礦物或岩石的放射性同位素的測定，依據放射性元素蛻變規律計算其絕對年齡，即距今天的年數。

英文解釋

Absolute dating, which yields age estimates interms of years before present (yrs BP) – “present” = 1950 ‐‐ plus/minus a margin of error(e.g., 12,000 years BP, +/‐ 180 years).

Two method of absolute dating:

1. 40K–40Ar (or, potassium‐argon) dating, and 40Ar‐39Ar(or, argon‐argon) dating:
   The sites cannot be too young or lack of the vocanic ash sediment deposite, such as the early pioneer settlement in Atlantic Canada.
   
2. Carbon-14 dating (also known as C‐14 dating, or radiocarbon dating):
   It must be carried out on organic material, and cannot be too old, such as fossils Homonid skeletal reamins.