| 引用本文: | 曾宜君, 黄思静, 阚泽忠, 熊昌利, 郝雪峰, 谢启兴, 曾勤.四川西部三叠系西康群地球化学特征与大地构造背景[J].沉积与特提斯地质,2006,26(1):22-29.[点击复制] |
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| 四川西部三叠系西康群地球化学特征与大地构造背景 |
| 曾宜君,黄思静,阚泽忠,熊昌利,郝雪峰,谢启兴,曾勤 |
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(1. 成都理工大学 油气藏地质及开发工程国家重点实验室, 四川 成都 610059;
2. 四川省地 质调查院, 四川 成都 610081) |
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| 摘要: |
| 三叠系西康群碎屑岩主体为一套浊积岩复理石建造。通过对西康群砂、泥岩地球化学组成特征研究,认为其物源来自康滇古陆表壳岩及其上覆的盖层沉积,大地构造属性为被动大陆边缘到活动大陆边缘再到多岛弧的转化。 |
| 关键词: 三叠系 西康群 地球化学 构造背景 四川西部 |
| DOI： |
| 附件 |
| 投稿时间：2006-01-10 |
| 基金项目:国家自然科学基金(40472068);中国地质调查局项目“1:25万色达、阿坝幅区域地质调查(200313000026)”。 |
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| Geochemical signatures and tectonic setting of the clastic rocks from the Triassic Xikang Group in western Sichuan |
| ZENG Yi-jun, HUANG Si-jing, KAN Ze-zhong, XIONG Chang-li, HAO Xue-feng, XIE Qi-xing, ZENG Qin |
(1. Chengdu University of Technology, Chengdu 610059, Sichuan, China;
2. Sichuan Institute of Geological Survey, Chengdu 610081, Sichuan, China) |
| Abstract: |
| The clastic rocks widespread in the Triassic Xikang Group in western Sichuan consist dominantly of turbiditic flysch formations.The geochemical examination of the sandstones and mudstones from the Xikang Group has led us to conclude that the debris are derived mostly from the surficial rocks and their overlying deposits on the Xikang-Yunnan ancient land,and tectonic settings display the transition from the passive continental margin to active continental margin and finally to archipelago. |
| Key words: Triassic Xikang Group geochemistry tectonic setting western Sichuan |