大兴安岭乌奴尔地区裸河组沉积地质特征及物源分析

现代矿业 ›› 2020, Vol. 36 ›› Issue (09): 37-40.

大兴安岭乌奴尔地区裸河组沉积地质特征及物源分析

李利阳^1，2 刘博^1，2

1.中国地质调查局廊坊自然资源综合调查中心；2.武警黄金第四支队

出版日期:2020-09-25 发布日期:2021-09-23

Sedimentary Geological Characteristics and Sediment Source of Luohe Formation in Wunuer Area，Great Khingan Mountains

LI Liyang^1,2 LIU Bo^1,2

1.Langfang Comprehensive Natural Resources Survey Center of China Geological Survey; 2.No.4th Detachment of Gold Headquarters

Online:2020-09-25 Published:2021-09-23

摘要/Abstract

摘要： 大兴安岭乌奴尔地区裸河组地层位于西伯利亚板块东南缘古生代陆缘增生带，是研究中亚造山带弧沟体系的重要窗口之一，为了解研究区裸河组的沉积特征及沉积物源性质，丰富中亚造山带弧沟体系中的沉积地层，利用沉积地质学及岩石地球化学方法，对裸河组地层沉积地质特征及物源进行研究，取得以下主要进展：①裸河组地层发育平行层理、水平层理，可见3种主要基本层序类型。②沉积物粒度分析结果显示，裸河组为浅海相沉积。③主量元素、微量元素及稀土元素特征指示，裸河组的沉积物源形成于大陆岛弧构造环境。

关键词: 大兴安岭裸河组沉积地质特征物源

Abstract: Luohe formation in Wunuer area，Great Hinggan Mountains is locate in the accretion zone of the Paleozoic continental margin of the southeast Siberian plate，it's a "window" to recognize Central Asian Orogenic Belt's trencharc system.In order to understand the sedimentary characteristics and source properties of the Luohe formation and enrich the study of sedimentary strata in Central Asian Orogenic Belt's trencharc system,Using sedimentary geology and petrogeochemical methods,the sedimentary geological characteristics and sediment source are analyzed and studied，Based on these works， three following understanding can be found:①Parallel bedding and horizontal bedding are developed in the Luohe Formation，Three main basic sequence types can be seen.②The results of sediment grain size analysis show that the Luohe Formation is shallow sea facies deposit.③The characteristics of major elements，trace elements and rare elements indicate that the sediment source of the Luohe Formation was formed in an island arc environment．

Key words: great khingan mountains, luohe formation, sedimentary geological characteristics, sediment source

李利阳刘博. 大兴安岭乌奴尔地区裸河组沉积地质特征及物源分析[J]. 现代矿业, 2020, 36(09): 37-40.

LI Liyang LIU Bo. Sedimentary Geological Characteristics and Sediment Source of Luohe Formation in Wunuer Area，Great Khingan Mountains[J]. Modern Mining, 2020, 36(09): 37-40.

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