海南岛上泥盆统发现微球粒  

Microspherules Found from the Upper Devonian Limestone of Hainan Island

作　　者：张仁杰[1,2] 张华[2] 姚华舟[1,2] 王建雄[1] 牛志军[1] 

机构地区：[1]中国地质调查局武汉地质矿产研究所,武汉430223 [2]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,南京210008

出　　处：《科学技术与工程》2010年第33期8123-8127,共5页Science Technology and Engineering

基　　金：国家自然科学基金(40772022、40702017);现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)(103111);中国地质调查局国土资源大调查项目(No1212010811040)资助

摘　　要：海南岛昌江县鸡实村上泥盆统昌江组上部灰岩含丰富的炭质微球粒及少量硅质球粒。海南炭质球粒的化学组成、产出状况等,与加拿大前寒武系方解石脉内的焦沥青球粒十分接近,但前者具有类似撞击球粒的表面特征。硅质球的化学组成及表面特征与撞击成因的微球相似,但球粒数量少,且赋存于粗晶方解石脉内,与典型的撞击微球粒不同。海南的微球粒是以冰醋酸酸解灰岩获得,因而可以排除是工业飞灰。它们的内部未见任何结构,不同于火山成因微球。Fairly abundant microspherules including carbon microspherules and siliceous microspherules recovered from the Upper Devonian limestone of Jishi Village,Changjiang County,Hainan Island.The chemical composition and occurrence status of carbon microspherules are very similar to that of globular blebs of pyrobitumen found in veins of Precambrian,Canada.However,the Hainan carbon microspherules have very similar surface sculptures of impact microspherules,and differ from the Canada＇s.It is a unique kind of microspherules.The siliceous microspherules show the same surface sculptures as the impact microtektites＇.But there are very few siliceous microspherules in amount,in Hainan.No any structure has been examined from the polished section of the Hainan microspherules.So,they differ from the volcanic origin.In addition,the Hainan microspherules are recovered from the limestone by the method of acid digestion analysis.So,they are not the industrial fly ashes.

关 键 词：海南岛 上泥盆统 微球粒 

分 类 号：P534.44[天文地球—古生物学与地层学]