9批正品龙骨药材的年代测定及年代与成分的相关性分析  

The Dating of 9Batches of Authentic Os Draconis and the Correlation Between the Age Range and the Ingredients

作　　者：陈迪 宋晨 宋杉杉 张志杰[1] 张海燕[1] CHEN Di;SONG Chen;SONG Shan-shan;ZHANG Zhi-jie;ZHANG Hai-yan(Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences,Beijing 100700,China)

机构地区：[1]中国中医科学院中药研究所,北京100700

出　　处：《光谱学与光谱分析》2023年第6期1900-1904,共5页Spectroscopy and Spectral Analysis

基　　金：中国中医科学院创新工程项目(C12021A04009)资助。

摘　　要：采用^(14)C测年法对采集的龙骨样品进行了年代测定,选取其中9批符合化石年代的正品龙骨,采用X射线粉末衍射技术(XRD)和电子探针微区分析技术对样品的物相组成及元素赋存形态进行了分析,结果显示龙骨的主体物相为羟磷酸钙,部分样品为羟磷酸钙和碳酸钙共存;样品中的羟磷酸钙以羟基磷灰石为主要存在形式,碳酸钙则多以方解石型碳酸钙存在,少部分以白云石形式存在。采用ARF、ICP-AES、ICP-MS、AES法对9批正品龙骨样品进行了元素含量的测定,结果显示:龙骨中钙磷的比值均大于2,推测因化石形成过程中,骨骼的有机磷在地质过程中较多被分解而造成;9批龙骨的微量元素具有大致相同的分配模式:Sc、V、Cr、Co、Ni、Cu六种元素相对原始地幔均为亏损,Ba、Sr、As为异常富集,元素U为高度富集;9批龙骨中的稀土元素分布也具有大致相同的分配模式,表现为轻稀土富集型,Ce负异常,Eu部分正异常、部分负异常,Y轻微正异常;6批年代在4.35万年以前的龙骨,稀土元素总量明显高于3批年代在1.8~3.7万年之间的样品,推测一方面与其埋藏成岩环境有关,另一方面与其埋葬年代更为久远有关。In this paper,the carbon-14 dating was used,and 9 batches of Os Draconis samples correspond to the fossil age range:3 batches of samples are between 18000 and 37000 years,and 6 batches of samples are 43500 years before.XRD and EPMA were used to determine the phase composition and elemental morphology of 9 batches of authentic Os Draconis.The main component of the Os Draconis was calcium hydroxyphosphate and some samples were hydroxyphosphate Symbiosis of calcium and calcium carbonate;the micro-phase is mainly hydroxyapatite,while calcium carbonate is mostly in the form of calcite-type calcium carbonate,and a small part is in the form of dolomite.The ARF,ICP-AES,ICP-MS,and AES were used to determine the element content of the samples.The results showed that the Ga/P ratio in the Os Draconis was greater than 2.The trace elements of the 9 batches of Os Draconis had approximately the same Distribution pattern:Sc,V,Cr,Co,Ni,Cu are all depleted relative to the original mantle,Ba,Sr,As are abnormally enriched,and element U is highly enriched;the distribution of rare earth elements in 9 batches of Os Draconis is also It has roughly the same distribution pattern,showing LREE enrichment type,with Ce negative anomaly,Eu partial positive anomaly,partial negative anomaly,LREE positive anomaly;6 batches of Os Draconis before 43500 years,the total amount of rare earth elements is significantly higher The three batches of samples between 18000 and 37000 years are presumed to be related to their burial diagenetic environment on the one hand,and to the older the age,the higher the concentration of some elements.

关 键 词：龙骨 ^(14)C年代测定法 物相组成 微区成分 微量元素 稀土元素 

分 类 号：P575.1[天文地球—矿物学]