Reclassification of the Meso- and Neoproterozoic Chronostratigraphy of North China by SHRIMP Zircon

来源 :Acta Geologica Sinica(English Edition) | 被引量 : 0次 | 上传用户:augenthaler
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
High-quality zircon U-Pb ages acquired from Meso- and Neoproterozoic strata in North China in recent years has provided a high-resolution chronostratigraphic framework for dating. A basis of this high-level chronostratigraphic system provides the foundation for a global Precambrian study and stratigraphic correlation and so recent geological studies have focused attention on systemic SHRIMP zircon dating. A chronology of Meso- and Neoproterozoic strata and the time of origin of the overlying Changcheng System is given on the basis of new SHRIMP zircon dating from the Qianxi Complex and diabase of the Chuanlinggou Formation. A new tectonostratigraphy for a Neoproterozoic chronostratigraphic framework in the southeastern margin of the North China continent is underpinned by the new SHRIMP zircon dating of a Neoproterozoic mafic magma diabase in the Jiao-Liao-Xu-Huai Sub-Province. High-quality zircon U-Pb ages acquired from Meso- and Neoproterozoic strata in North China in recent years have provided a high-resolution chronostratigraphic framework for dating. A basis of this high-level chronostratigraphic system provides the foundation for a global Precambrian study and stratigraphic correlation and so recent geological studies have focused attention on systemic SHRIMP zircon dating. A chronology of Meso- and Neoproterozoic strata and the time of origin of the overlying Changcheng System is given on the basis of new SHRIMP zircon dating from the Qianxi Complex and diabase of the Chuanlinggou Formation. A new tectonostratigraphy for a Neoproterozoic chronostratigraphic framework in the southeastern margin of the North China continent is underpinned by the new SHRIMP zircon dating of a Neoproterozoic mafic magma diabase in the Jiao-Liao-Xu-Huai Sub-Province.
其他文献
AIM: To investigate simultaneously UGT1A7, UGT1A9, ARP, SPINK and CFTR genes to verify whether genetic polymorphisms predispose to the development of pancreatic
杭州轨交1号线闸—火区间联络通道在临近的轨交4号线官河站基坑施工过程中发生不均匀沉降。为达到抬升隧道、恢复隧道正常使用功能的目的,修复措施采用隧道底部压密注浆技术
为了解国人双重眼睑形态,为双重睑成型提供合理而较准确的手术资料,自1975~1983年测量了2,000例正常人睑形,整理了104例双重眼睑成形术病例资料,现报告如下: 材料与方法2000
作者报导经活检证实为颞动脉炎的14例患者。女10例,男4例,年龄57—84岁(平均72岁)。病程2周到6年。其中眼肌麻痹者7例(50%),眼睑下垂5例(36%),瞳孔缩小5例(36%)。本组病例的症
慢性鼻炎和萎缩性鼻炎由于有些症状相似,而易误诊,现将各自的特点简述如下: 一、慢性鼻炎:它是一种常见的鼻病,通常可分为单纯性和肥厚性两种。引起慢性鼻炎的病因很多,例如
当前大学生心理问题日益突出,心理疾患的发生呈上升趋势,在推进大学生心理健康工作过程中的难点是及时甄别心理疾患的类型和及时有效的专业干预。分析了两大难点形成的原因,
慢性血管舒缩性鼻炎的治疗颇为棘手。此病虽无严重后果,但经年累月喷嚏连连,涕水不断,使患者颇为苦恼。 1959年Malcomson首先报告经鼻中隔切断翼管神经,以治疗慢性血管舒缩
角膜白斑多为炎症、外伤及营养不良等因素所致。国内外采用中西医各种疗法治疗该病,虽取得一定效果,但都不理想。在“珍珠层粉”药物介绍中,述及治疗角膜白斑4例,使我们受到
今年,又是一个甲申年。 60年前,郭沫若同志的一篇《甲申三百年祭》,引起了毛泽东的高度重视。 抗日战争必将胜利,中国共产党人的理想之花必将在华夏大地盛开。面对即将到来
<正> 1908年Coats首先从临床及病理方面,对外层渗出性视网膜病变进行了研究,命名为出血性外层视网膜炎。1912年Coats又发现本病除视网膜出血外,还有渗出改变,故更名为外层渗