| 西藏嘉黎巴嘎地区早白垩世多尼组地层特征与沉积环境 |
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| 引用本文： | 杨德明,胡波,董清水,王天武. 西藏嘉黎巴嘎地区早白垩世多尼组地层特征与沉积环境[J]. 世界地质, 2009, 28(3): 280-283. DOI: 10.3969/j.issn.1004-5589.2009.03.003 |
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| 作者姓名： | 杨德明 胡波 董清水 王天武 |
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| 作者单位： | 吉林大学,地球科学学院,长春,130061;重庆地质矿产研究院,重庆,400042 |
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| 基金项目： | 中国地质调查局地调项目:西藏门巴区幅1:25万区域地质调查 |
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| 摘 要： | 研究区多尼组为一套含煤的灰色至黑色岩屑石英砂岩、长石砂岩、碳质粉砂岩和页岩, 生物地层特征指示其时代为早白垩世早期贝里阿斯期-凡兰吟期(Berriasian-Valanginian) 。岩性特征和碎屑岩粒度分析表明, 区内多尼组沉积环境主要为三角洲沉积, 包括前三角洲、三角洲前缘和三角洲平原 3个亚相, 三级层序总体表现为逐渐海进的特点。
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| 关 键 词： | 西藏 嘉黎县 早白垩世 多尼组 |
Lithostratigraphy and sedimentary environment in Lower Cretaceous Duoni Formation in Baga area of Jiali, Tibet |
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| YANG De-Ming-,HU Bo-,DONG Qing-Shui-,WANG Tian-Wu-. Lithostratigraphy and sedimentary environment in Lower Cretaceous Duoni Formation in Baga area of Jiali, Tibet[J]. Global Geology, 2009, 28(3): 280-283. DOI: 10.3969/j.issn.1004-5589.2009.03.003 |
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| Authors: | YANG De-Ming- HU Bo- DONG Qing-Shui- WANG Tian-Wu- |
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| Affiliation: | 1. College of Earth Sciences, Jilin University, Changchun 130061, China; 2. Chongqing Institute of Geology & Mineral Resources, Chongqing 400042, China |
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| Abstract: | Duoni Formation in the studied area is a set of coaly grey to black lithic quartz sandstones, feldspar-sandstones, carbonous siltstones and shale. The biostratigraphic characteristics indicate the age of Duoni Formation is Berriasian to Valanginian of Early Cretaceous. The analyses of lithologic features and clastic rock size show that the sedimentary environment of Duoni Formation is delta deposit, including prodelta, delta front and delta plain, and the third-order sequence presents gradual transgression feature in general. |
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| Keywords: | Tibet Jiali County Early Cretaceous Duoni Formation |
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