| 浙西北上墅组同位素年代地层学研究 |
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| 引用本文：徐步台,邱郁双.1994.浙西北上墅组同位素年代地层学研究[J].地球学报,15(1,2):51-59. |
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| 中文摘要:本文对上墅组火山岩测定了Sm-Nd全岩等时线年龄，其中，上、下岩性段分别为806±59 Ma和894±75 Ma。由此表明，上墅组火山岩系形成于晚元古代早期，相当于青白口系。因此，它可与赣东北登山群（817 Ma,929 Ma）和皖南井潭组（839 Ma）或沥口群（877 Ma）相对比。 |
| 中文关键词:上墅组火山岩系，同位素年龄，青白口系，浙江 |
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| AISOTOPE GEOCHRONOLOGY STUDY OF SHANGSHU FORMATION IN NORTHWESTERN ZHEJIANG PROVINCE |
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| Abstract:The volcanic-rock series of Shangshu formation,which consisting of basic or acidic lava and clas-tic rocks,was distributed in the range Shaoxing-Fuyang to Quzhou-Jiangshan of northwestern Zhejiang Province.Untiil now,there are different opinions about the geological age of this formation,because the available dating data have not been obtained.In this paper,Sm-Nd isochron ages for the volcanic rocks of Shangshu formation are measured,in which upper and lower lithologic members are 806±59 Ma and 894±75 Ma respectively.These results indicate that Shangshu Formation was formed in the early stage of late Proterozoic,and belongs to Qingbaikou System.Therefore,this formation may be correlated with Densshan Group(817 Ma,929 Ma)of northeastern Jiangxi Province and Jingtan For-mation(839 Ma)or Likou Group (877 Ma)of southern Anhui Province. |
| keywords:volcanic-rock series of Shangshu Formation isotopic age Qingbaikou System Zhejiang Province |
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