浅覆盖区陆相盆地高频层序划分与岩石化学的对比——以大兴安岭北段上黑龙江盆地绣峰组为例

任凤和; 杨晓平; 周兴福; 李仰春

浅覆盖区陆相盆地高频层序划分与岩石化学的对比——以大兴安岭北段上黑龙江盆地绣峰组为例

1.
中国地质大学地球科学与资源学院, 北京 100083
2.
黑龙江省地质调查总院, 黑龙江哈尔滨 150036
3.
黑龙江省地质调查研究总院齐齐哈尔分院, 黑龙江齐齐哈尔 161005

基金项目:

国家基础地质调查项目浅覆盖区1:2 5万区调填图方法研究课题成果 1996130000704

详细信息

作者简介:
任凤和(1961-), 男, 教授级高工, 在读博士, 从事区域地质调查与研究工作.E-mail: Rfhe@163.com

中图分类号: P53;P59
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出版历程
- 收稿日期: 2004-08-28
- 刊出日期: 2004-11-25

Comparison of High-Frequency Sequence Division and Petrochemistry in the Continental Basin of Thin Cover Area: Example with Xiufeng Formation of Upper Heilongjiang Basin in North Daxing'anling

1.
School ofthe Earth Sciences and Resources, China University ofGeosciences, Beijing 100083, China
2.
Heilongjiang Institute ofGeological Survey, Harbin 150036, China
3.
Qoqihar Branch, Research Institute ofRegional Geological Survey ofHeilongjiang, Qoqihar 161005, China

摘要

摘要: 利用岩石化学中各种氧化物及相关比值在陆相盆地沉积作用中的不同表现性质, 讨论了上黑龙江盆地绣峰组Ⅳ级层序形成的气候、水体、沉积体系及基准面变化特征.绣峰组Ⅳ级层序自下部向中部Fe₂O₃、Fe³⁺/Fe²⁺、K₂O、Na₂O等值逐渐减小; MnO、FeO、MgO、LOS等含量逐渐增高; 层序中部向上部Fe₂O₃、K₂O、Na₂O等值逐渐增大, MnO、FeO等含量逐渐减少, 显示了绣峰组Ⅳ级层序在气候旋回控制下由水体加深、气候潮湿向水体变浅、气候干旱演变的中期基准面对称旋回特征.这一研究成果为陆相盆地高频层序划分提供了新思路.
- 岩石化学 /
- 高频层序 /
- 绣峰组 /
- 陆相盆地 /
- 浅覆盖区
Abstract: Use different expressions of the various oxides and relevant ratio of lithochemistry in continental basin, this paper discusses the forming climate, water body, depositional system and base level characteristics of level Ⅳ sequence in Xiufeng Formation of upper Heilongjiang basin. Fe₂O₃, Fe³⁺/Fe²⁺, K₂O, Na₂O, etc. decreased gradually from bottom to middle in level Ⅳ sequence of Xiufeng Formation; MnO, FeO, MgO, LOS, etc. increased gradually; from middle to top, Fe₂O₃, K₂O, Na₂O, etc. increased gradually, MnO, FeO, etc. decreased. The symmetrical cycle characteristics show that the base level of the middle period is from a deep water body and a damp climate, changing to a shallow water body and dry climate in level Ⅳ sequence of Xiufeng Formation. This study provides a new thought for high frequency sequence division of continental basin.
- petrochemistry /
- high-frequency sequence /
- Xiufeng Formation /
- continental basin /
- shallow cover area

HTML全文

图 1 上黑龙江盆地绣峰组分布

Fig. 1. Distribution of Xiufeng Formation in upper Heilongjiang basin

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图 2 绣峰组Ⅳ级层序与岩石化学曲线对比

Fig. 2. Ⅳ level sequence and lithochemical chart contrasting of Xiufeng Formation

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表 1 绣峰组主要化学成分分析

Table 1. Major chemical compositions of Xiufeng Formation

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