岩矿测试
巖礦測試
암광측시
Rock and Mineral Analysis
2015年
5期
520-527
,共8页
恐龙蛋壳%生命微量元素%锶和铱%超高异常%电感耦合等离子体发射光谱法
恐龍蛋殼%生命微量元素%鍶和銥%超高異常%電感耦閤等離子體髮射光譜法
공룡단각%생명미량원소%송화의%초고이상%전감우합등리자체발사광보법
dinosaur eggshell%trace elements of life%strontium and iridium%obvious abnormality%Inductively Coupled Plasma-Optical Emission Spectromet ry
恐龙蛋化石是探索恐龙生存和灭绝的重要研究材料，目前对恐龙蛋化石的研究集中在生物学和埋藏特征方面。本文利用电感耦合等离子体发射光谱法（ ICP-OES）对采自河南西峡晚白垩世的12枚恐龙蛋化石壳及部分围岩进行分析测试，研究其生命微量元素组成及其与恐龙灭绝的关系。结果表明，恐龙蛋壳中缺乏碳氮磷硫等有机质元素，而主要由钙铝镁铁钾等生命必需元素和锶锰钡镧锌硼钒钴铱等微量元素组成，其中锶和铱均具有明显的超高异常，这可能与地外撞击事件引起生态环境的急剧变化有关。元素的组合规律表明西峡盆地晚白垩世应为干旱、半干旱的气候环境，来自于环境中异常含量的锶和铱共同作用使这一时期该地区大量的恐龙蛋在恐龙体内遭受污染，发育孵化机能受到影响，成为导致盆地内恐龙灭亡的主要原因之一。这一发现为探讨恐龙生活环境变化、灭绝原因以及揭示晚白垩纪古气候提供了重要依据。
恐龍蛋化石是探索恐龍生存和滅絕的重要研究材料，目前對恐龍蛋化石的研究集中在生物學和埋藏特徵方麵。本文利用電感耦閤等離子體髮射光譜法（ ICP-OES）對採自河南西峽晚白堊世的12枚恐龍蛋化石殼及部分圍巖進行分析測試，研究其生命微量元素組成及其與恐龍滅絕的關繫。結果錶明，恐龍蛋殼中缺乏碳氮燐硫等有機質元素，而主要由鈣鋁鎂鐵鉀等生命必需元素和鍶錳鋇鑭鋅硼釩鈷銥等微量元素組成，其中鍶和銥均具有明顯的超高異常，這可能與地外撞擊事件引起生態環境的急劇變化有關。元素的組閤規律錶明西峽盆地晚白堊世應為榦旱、半榦旱的氣候環境，來自于環境中異常含量的鍶和銥共同作用使這一時期該地區大量的恐龍蛋在恐龍體內遭受汙染，髮育孵化機能受到影響，成為導緻盆地內恐龍滅亡的主要原因之一。這一髮現為探討恐龍生活環境變化、滅絕原因以及揭示晚白堊紀古氣候提供瞭重要依據。
공룡단화석시탐색공룡생존화멸절적중요연구재료，목전대공룡단화석적연구집중재생물학화매장특정방면。본문이용전감우합등리자체발사광보법（ ICP-OES）대채자하남서협만백성세적12매공룡단화석각급부분위암진행분석측시，연구기생명미량원소조성급기여공룡멸절적관계。결과표명，공룡단각중결핍탄담린류등유궤질원소，이주요유개려미철갑등생명필수원소화송맹패란자붕범고의등미량원소조성，기중송화의균구유명현적초고이상，저가능여지외당격사건인기생태배경적급극변화유관。원소적조합규률표명서협분지만백성세응위간한、반간한적기후배경，래자우배경중이상함량적송화의공동작용사저일시기해지구대량적공룡단재공룡체내조수오염，발육부화궤능수도영향，성위도치분지내공룡멸망적주요원인지일。저일발현위탐토공룡생활배경변화、멸절원인이급게시만백성기고기후제공료중요의거。
Dinosaur egg fossils are important for exploring the survival and extinction of the dinosaurs. Current researches on dinosaur egg fossils are concentrated in their biology and burial features. In this study,Inductively Coupled Plasma-Optical Emission Spectrometry( ICP-OES)was used to determine trace element composition of twelve dinosaur eggshell fossils in the late Cretaceous from Xixia basin and their surrounding rocks,in order to the relationship between trace elements and the extinction of dinosaurs. Results show that the dinosaur eggshell fossils are depleted in organic elements such as C,N,P and S,and mainly consist of essential elements such as Ca,Al, Mg,Fe and K and other trace elements such as Sr,Mn,Ba,La,Zn,B,V,Co and Ir. Abnormal high Ir and Sr may be related to the extraterrestrial impact event causing the dramatic changes of the ecological environment. Element assemblages indicated that the climate during the late Cretaceous in this area might have been semiarid to arid. Abnormal high Ir and Sr in the environment probably have caused structure and pathological changes of those eggs within the dinosaurs. Thereby the dinosaur eggs could not be hatched,which probably resulted in the gradual demise of dinosaurs. This study provides an important basis for investigating the living environment of dinosaurs, causes of extinction and the late Cretaceous climate.
