CAJ | 학술논문

介绍了一种简单的辉钼矿Re-Os同位素定年中Re的化学分离方法,采用"钽试剂"(N-苯甲酰基苯基羟胺)的氯仿溶液萃取辉钼矿中的主要基体和干扰元素,如Mo、Fe和W,达到Re与这些主要基体元素分离的目的.在此基础上,建立了Carius管溶样-四氯化碳萃取分离Os- "钽试剂"萃取分离Re以及同位素稀释电感耦合等离子体质谱法测定的分析流程.利用该分析流程,对辉钼矿标准物质JDC进行Re-Os同位素年龄测定研究,测得其Re、Os的平均含量及年龄分别为(17.6±0.2)μg/g、(25.9±0.3)ng/g和(140.1±2.4)Ma,该结果在误差范围内与标准参考值一致.与目前常用的辉钼矿Re-Os同位素定年方法相比,该方法具有操作简便、快速、高效以及成本低的优势,非常适合作为辉钼矿Re-Os同位素定年的化学分离常规方法.
개소료일충간단적휘목광Re-Os동위소정년중Re적화학분리방법,채용"단시제"(N-분갑선기분기간알)적록방용액췌취휘목광중적주요기체화간우원소,여Mo、Fe화W,체도Re여저사주요기체원소분리적목적.재차기출상,건립료Carius관용양-사록화탄췌취분리Os- "단시제"췌취분리Re이급동위소희석전감우합등리자체질보법측정적분석류정.이용해분석류정,대휘목광표준물질JDC진행Re-Os동위소년령측정연구,측득기Re、Os적평균함량급년령분별위(17.6±0.2)μg/g、(25.9±0.3)ng/g화(140.1±2.4)Ma,해결과재오차범위내여표준삼고치일치.여목전상용적휘목광Re-Os동위소정년방법상비,해방법구유조작간편、쾌속、고효이급성본저적우세,비상괄합작위휘목광Re-Os동위소정년적화학분리상규방법.
In this study, we introduced a simple method for chemical separation of Re for molybdenite Re-Osdating. N-benzoyl-N-phenylhydroxylamine (BPHA) in chloroform solution was employed for the removal of Mo, Fe and W which are major elements in molybdenite. An analytical procedure is established based on the Carius tube digestion and carbon tetroxide (CCl_4) extraction of Os, BPHA extraction for the separation of Re, then Re and Os concentrations are measured by isotope dilution-inductively coupled plasma mass spectrometry (ICP-MS). The analytical procedure was applied to the determination of the Re-Os dating molybdenite reference materials (JDC),the contents of Re, Os and ages for JDC were (17.6±0.2) μg/g, (25.9±0. 3) ng/g and (140. 1 ±2.4) Ma,respectively. These results are in agreement with the reference values. The characteristics of the method, i.e.,comparative simplicity, efficiency, a shorter period and lower cost, make it especially suitable for routine analysis.