辽河坳陷东部凹陷火成岩形成与分布的控制因素

新疆石油地质 ›› 2009, Vol. 30 ›› Issue (5): 576-578.

辽河坳陷东部凹陷火成岩形成与分布的控制因素

杨光达

中国石油辽河油田分公司勘探开发研究院,辽宁盘锦 124010

收稿日期:2009-03-13 修回日期:2009-04-19 出版日期:2009-10-01 发布日期:2020-09-30
作者简介:杨光达（1974-）,男,吉林吉林人,工程师,硕士,构造地质, （Tel）0427-7826530（E-mail）mlq-007@163.com.

The Control Factors of Igneous Rocks Formation and Distribution in Dongbu Sag in Liaohe Depression

YANG Guang-da

Research Institute of Exploration and Development, Liaohe Oilfield Company, PetroChina, Panjin, Liaoning 124010, China

Received:2009-03-13 Revised:2009-04-19 Online:2009-10-01 Published:2020-09-30

摘要/Abstract

摘要： 从形成环境和构造演化等方面分析了辽河坳陷东部凹陷古近系火成岩的形成机理。认为本区各类火成岩属同源岩浆,未经历混染作用,粗面岩较玄武岩、辉绿岩结晶分异时间长。辉绿岩为渐新世晚期侵入体;沙三中段火山岩为水下喷发;沙三上段到东营组以水上喷发为主。岩浆活动主要受控于界西、驾掌寺、二界沟等断裂,始新世岩浆活动中心位于凹陷中段,渐新世位于南北两端;粗面岩主要发育于凹陷中南部沙三中段。

关键词: 辽河坳陷, 东部凹陷, 火成岩, 形成环境, 构造演化

Abstract: The formation mechanism of Eogene igneous rocks in Dongbu sag in Liaohe depression is analyzed in terms of forming environment and structural evolution. It is suggested that the various igneous rocks in this area belong to cogenetic magma without hybridism, and the crystal fractionation period of related trachyte is longer than those of basalt and diabase. The diabase is intrusive mass of Late Oligocene. The volcanic rock of the middle section of Sha-3 member features underwater eruption, while the upper section of Sha-3 member to Dongying formation is dominated by above-water eruption. The magma activity is mainly controlled by such faults as Jiexi, Jiazhangsi and Erjiegou, etc., and its center in Eocene is located in the middle section of Dongbu sag, the active center of magma in Oligocene is located in two sides of south and north Dongbu sag. The trachyte is mainly found in the midsection of Sha-3 member in south-central Dongbu sag.

Key words: Liaohe depression, Dongbu sag, igneous rock, volcanic rock, forming environment, structural evolution

中图分类号:

TE112.222

杨光达. 辽河坳陷东部凹陷火成岩形成与分布的控制因素[J]. 新疆石油地质, 2009, 30(5): 576-578.

YANG Guang-da. The Control Factors of Igneous Rocks Formation and Distribution in Dongbu Sag in Liaohe Depression[J]. Xinjiang Petroleum Geology, 2009, 30(5): 576-578.

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