2篇
您的检索式：作者名="Gongjing Zhang"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | SIMS U-Pb Zircon Geochronological and Carbon Isotope Chemostratigraphic Constraints on the Ediacaran-Cambrian Boundary Succession in the Three Gorges Area, South China显示文摘The Ediacaran–Cambrian succession in South China records dramatic biological,oceanic and geochemical changes,but it is not well constrained geochronologically.This study reports a new SIMS U-Pb date of 543.4±3.5 Ma(MSWD=1.2)from a tuffaceous layer in the Zhoujiaao Section,and carbonate C-O isotopes in both Zhoujiaao and Sixi sections,Three Gorges area.This tuffaceous layer is present in the Upper Dengying Formation(i.e.,the Baimatuo Member)which is characterized by a stableδ13Ccarb plateau and the beginning of a negativeδ13Ccarb shift near its upper boundary.In accordance with the existing biostratigraphic and chemostratigraphic data,this new date corroborates that the upper boundary of the Dengying Formation in South China is approximately equivalent to the Ediacaran-Cambrian boundary(ca.541 Ma).This age also provides the minimum age of the last appearance of the Shibantan biota in the Three Gorges area,indicating that the terminal Ediacaran index fossils(e.g.,Cloudina,Sinotubulites)are not reliable stratigraphic markers for further subdivision of the uppermost Ediacaran. | Taiyu Huangc Daizhao Chen Yi Ding Xiqiang Zhou Gongjing Zhang | 2020 | Journal of Earth Science2020，31，1： | 2 |
| 2 | Solid reconstruction using recognition of quadrie surfaces from orthographic views显示文摘 | GONGJ H ZHANG H ZHANG G F etal | 2006 | Computer-Aided Design2006，38，8： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员