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| 中祁连地块东段元古宙基底地层格架讨论 | |
| 引用本文： | 郭进京,张国伟,陆松年,赵凤清,李怀坤,郑健康.中祁连地块东段元古宙基底地层格架讨论[J].地质通报,1999,18(4):48. |
| 作者姓名： | 郭进京 张国伟 陆松年 赵凤清 李怀坤 郑健康 |
| 作者单位： | 1. 西北大学地质系,陕西,西安,710069 2. 天津地质矿产研究所,天津,300170 3. 青海省区调综合地质大队,青海,西宁,810012 |
| 基金项目： | 原地质矿产部地质调查局攻关项目 |
| 摘 要： | 中祁连地块东段元古宙基底一般认为由３ 套地层组成，即古元古代湟源群、中元古代长城系湟中群和蓟县系花石山群，三者之间皆为平行不整合关系。但新的研究表明：（１） 花石山群与下伏的湟源群为角度不整合，结合新近发现的化石资料分析，认为花石山群是震旦纪—寒武纪稳定盖层沉积，不应归于基底组成部分；（２） 湟源群与湟中群为同一构造层，统称湟源群。 |
| 关 键 词： | 中祁连地块东段 元古宙基底 地层格架 湟源群 花石山群 |
| 文章编号： | 1000-3967(1999)04-0379-04 |
A discussion on the Proterozoic stratigraphy framework in the basement of eastern section of the Mid-Qilian Massif |
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| GUO Jin-jing,ZHANG Guo-wei,LU Song-nian,ZHAO Feng-qing,LI Huai-kun,ZHENG Jian-kang.A discussion on the Proterozoic stratigraphy framework in the basement of eastern section of the Mid-Qilian Massif[J].Geologcal Bulletin OF China,1999,18(4):48. | |
| Authors: | GUO Jin-jing ZHANG Guo-wei LU Song-nian ZHAO Feng-qing LI Huai-kun ZHENG Jian-kang |
| Abstract: | It is generally considered that the basement of the eastern part of Mid Qilian Massif consists of three stratigraphic sequences that are separated by parallel unconformable boundaries:the Paleoproterozoic Huangyuan Group,Mesoproterozoic Huangzhong Group and Huashishan Group.However,recent study suggest that(1)The Huashishan Group unconformably overlies the Huangyuan Group at angle,and paleontological data suggests that the Huashishan Group represents a stable sedimentary cover of Sinian to Cambrian age,rather than basement.(2)The Huangyuan Group and Huangzhong Group were formed in the same tectonic cycle and should be combined as Huangyuan Group. |
| Keywords: | eastern section of Mid Qilian Massif Proterozoic basement stratigraphic framework Huangyuan Group Huashishan Group |
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