It was dated by the potassium-argon method to 1. 8 million years old.
由钾―氩法测定其年龄为180万年。
potassium-argon age
钾-氩(法测得的)年龄
STUDY ON UNDETERMINED ARGON SPECTRAL LINES BY LASER INDUCED FLUORESCENCE
激光诱导荧光法研究氩的未定性谱线
Determination of traceable nitrogen in argon with PDHID-GC
高纯氩气中微量氮的(PDHID-GC)测定方法
Potassium-argon dating: Method for determining the age of igneous rocks Based on the amount of argon-40 in the rock.
钾－氩年代测定法: 根据岩石内氩－40的含量来测定火成岩形成年代的方法。
" Determination of trace argon, nitrogen and krypton in oxygen--Gas chromatographic method"
GB/T14605-1993氧气中微量氩、氮和氪的测定气相色谱法
THE ACCURATE MEASUREMENT OF 10~(-8) G. ARGON BY GAS CHROMATOGRAPHY
气相色谱法精确定量测定10~(-8)克微量氩
DETERMINATON OF TRACE He,Ne AND Ar IN GAS SAMPLES BY IDMS
同位素稀释质谱法测定气体样品中微量氦氖氩
A STUDY ON ARGON-OXYGEN COMBINATION BLOWING PROCESS FOR LOW-CARBON CAST STAINLESS STEEL
氩-氧复合吹炼法生产低碳不锈铸钢的试验研究
The Measurement and Analysis of Argon Plasma Arc Temperature Distribution Using Off-axis Peak Intensity Method
用离轴峰值法测定氩等离子体电弧的温度分布
Discussion on analyzing oxygen and argon in hydrogen production by chemical way auxiliarily;
用化学辅助法对氢气中氧氩分析的讨论
The Process Mechanism Analysis and Control Method Research of Steel-Making Bottom Blowing Argon
炼钢底吹氩过程机理分析与控制方法研究
Argon plasma coagulation for Barrett's esophagus:a systematic review
氩离子凝固疗法治疗Barrett食管的系统评价
The application of argon plasma coagulation in the treatment of gastrointestinal diseases
氩离子凝固疗法在消化道疾病中的应用进展
Inspecting methods of porosity welded joints in TIG welding
钨极氩弧焊焊接气孔产生原因查找方法
Clinical application of argon-arc welding in prosthodontics
氩弧焊接方法在口腔修复工艺技术中的应用
Butadiene for industrial use--Determination of oxygen and argon in the gaseous phase above liquid butadiene --Gas chromatographic method
GB/T6021-1985工业用丁二烯液上气相中氧和氩的测定气相色谱法
DETERMINATION OF Ar CONTENT IN AIR SEPARATOR WITH OXYGEN REACTOR
利用氧气反应炉法测定空分装置中氩组分的含量