昔格达组磁性地层的研究
文献类型：期刊论文
| 作者 | 钱方 ; 徐树金 ; 陈富斌 ; 赵永涛 |
| 刊名 | 山地研究
 |
| 出版日期 | 1984 |
| 卷号 | 2期号:4页码:275-282 |
| 关键词 | 昔格达组 高斯正向期 磁性地层 古地磁 细砂岩 元谋 平均沉积速率 渡口 次极 中国第四纪 |
| 其他题名 | STUDY ON THE PALEOMAGNETISM OF THE XIGEDA FORMATION |
| 通讯作者 | 钱方 |
| 中文摘要 | 昔格达组广泛分布在四川西南部的金沙江、雅砻江、大渡河等河谷中,早先常隆庆称其为“混旦层”,时代归于上新世;后被袁复礼改名为昔格达组,时代归于第四纪中或后期。由于在昔格达组中迄今尚未发现哺乳动物化石,上部地层中孢子花粉也极少,因而对其时代长期存在着争论。第四纪冰川考察队、西南烈度队等认为属早更新世,四川省区域地层表编写组则认为属上新世。本文试图通过对昔格达组磁性地层研究,为较确切地测定该组的时代提供依据。 |
| 英文摘要 | The results of magnetism measurements of the Xigeda Formation whit four sections in Southwest Sichuan show that the greater part of the Xigeda Formation is positive polarity which corresponds to the Couss, Polarity Epoch in the Late Cenozoic Era Polarity Timescale, There are two events of polarity reversal in it, which correspond to the Mammoth Event and the Kaena Event in the Couss. The upper part of the Formation is negative polarity which corresponds to the lower part of the Maturama Polarity Epoch. There are also two events of polarity revesal in it, which can correspond to the Reunion Event and the Olduval Event in the Maturama. The period during which the la -yer was formed from 3.286 million to 1.782 million years BP.The polarity series of the Xigeda Formation can correspond to the Number Ⅰ and Number Ⅱ of the Yuanmou Formation in Yunnun. It also corresponds to the Number Ⅱ and the lower part of the Number Ⅲ of the Yushe Formation in Shanxi. The information of the stratigraphic correlation and the paleontological correlation are in agreement with the results mentioned above. The age of the Xigeda Formation belongs to the Early Pleistocene Epoch. |
| 分类号 | P539.3 |
| 语种 | 中文 |
| 公开日期 | 2013-07-28 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5716]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） |
| 推荐引用方式 GB/T 7714 | 钱方,徐树金,陈富斌,等. 昔格达组磁性地层的研究[J]. 山地研究,1984,2(4):275-282. |
| APA | 钱方,徐树金,陈富斌,&赵永涛.(1984).昔格达组磁性地层的研究.山地研究,2(4),275-282. |
| MLA | 钱方,et al."昔格达组磁性地层的研究".山地研究 2.4(1984):275-282. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。