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2篇 您的检索式:作者名="KONG FanFan"
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1New data regarding acritarch biostratigraphy from the Early-Middle Cambrian Kaili Formation in Chuandong,Guizhou Province,China显示文摘Previous studies had evaluated acritarchs from the Balang and Pingzhai sections of the Early-Middle Cambrian Kaili Formation in east Guizhou,China.The results of these studies suggest that the acritarchs in these sections have potential biostratigraphic significance.More recently,34 samples collected from 83 m lower part of the Lower-Middle Cambrian Kaili Formation in the Jianshan section of Chuandong,Guizhou Province were prepared for palynological analysis.Analysis of these samples revealed a distinct change in the acritarch assemblages at the bed,which was approximately 46 m above the bottom of the Kaili Formation.These findings suggest a boundary represented by an important alteration of the ecological environment.In addition,the position of the acritarch biostratigraphic change is somewhat higher than the boundary between Cambrian Series 2 and Series 3 based on trilobites found in the same section.This indicates that the distinct change in acritarch assemblages is similar to the change in trilobite assemblages that occurs around the boundary between Cambrian Series 2 and Series 3.Therefore,acritarch biostratigraphy can provide data that can be used to define the base of Cambrian Series 3 in this region,and possibly worldwide.Leiming Yin Ruidong Yang Jin Peng Fanfan Kong 2009Progress in Natural Science:Materials International2009,19,1:9
2Paleoproterozoic glaciation: Evidence from carbon isotope record of the Hutuo Group, Wutai Mountain area of Shanxi Province, China显示文摘Palaeoproterozoic 全球冻结成冰(2.3 Ga ) 可以是地球历史上的第一个雪球地球事件。诺思中国暴露得好沉积存款这次有最小的 postdepositional 的时期改变。一个冻结成冰事件的沉积证据然而一直在缺乏。这里,我们在 Wutai 山区分析了 Paleoproterozoic Hutuo 组(2.52.2 Ga ) 的碳同位素作文,山西省,诺思中国。我们的数据表演,在里面一对更年轻的 chronostratigraphic 顺序更旧,(1 ) 积极 13Ccarb 在 Doucun 亚群的 Dashiling 形成珍视(3.2 ~ 1.0, VPDB ) ;(2 ) 在 13Ccarb 的减少从 Wenshan 形成珍视到中间的 Daguandong 形成(从 2.0 to1.2 ) ,在哪个时间期间 stromatolites 的出现衰退了;(3 ) 在上面的 Daguandong 形成的一次显著否定旅行,在 Daguandong 和 Huaiyincun 形成的边界(从 1.4 ~ 3.3 ) ,在 stromatolites 消失了的地方;并且(4 ) 13Ccarb 的渐渐的增加在 Beidaxing 和 Tianpengnao 形成珍视(从 1.2 ~ 1.4 ) ,在哪个期间时间 stromatolites 回来了。我们主张否定的碳同位素旅行从 Jianancun 形成记录了到 Hutuo 组的中间的 Daguandong 形成可以是对 Palaeoproterozoic 全球冻结成冰的诺思瓷器反应。KONG FanFan YUAN XunLai ZHOU ChuanMing 2011Chinese Science Bulletin2011,56,27:6
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