浙江省常山县上震旦统西峰寺组碳酸盐的δ^(13)C和δ^(18)O测定  

MEASUREMENTS OF δ^(13)C AND δ^(18)O IN CARBONATE OF THE UPPER SINIAN XIFENGSI FORMATION IN CHANGSHAN COUNTY, ZHEJIANG

作　　者：刘鸿允[1] 陈孟莪[1] 鲁刚毅[1] 

机构地区：[1]中国科学院地质研究所

出　　处：《地质科学》1992年第4期342-348,共7页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金4870150项成果之一

摘　　要：作者对浙江省常山县三里亭北九家坞的上震旦统剖面的碳酸盐系统采集的54个样品,作了碳、氧稳定同位素的分析。其中δ^(13)C除4个外几乎全为正值,平均值2.16％,这与前人提到过的文德期以δ^(13)C负迁移为特征的结论不符。离散变为9.0。最大负峰值出现在剖面近中部的磷块岩层中,可能与海流状况的剧变有关。δ^(18)O除最末两个为小的正值外,几乎全为负值。Total 54 samples were collected from the Upper Sinian Xifengsi Formation section at Jiujiawu north of Shanliting in Changshan County, Zhejiang Province. Result of carbon isotope measurement shows that majority of δ^(13)C is positive, but 4 negative. Then, calculated average is 2.16‰ and the deviation is 9.0‰. This record is not coincident with the previous conclusion on negative migration of δ^(13)O during the Vendian. The middle phosphaterich part of the section shows negative peak, indicating probably an abrupt turnover of oceanic current. The δ^(18)O ratio is almost all negative, except for last two samples.

关 键 词：碳酸盐 稳定同位素 上震旦世 

分 类 号：P578.6[天文地球—矿物学]