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现代地质 ›› 2014, Vol. 28 ›› Issue (4): 751-760.

• 地层与构造 • 上一篇    下一篇

新疆阿尔泰南缘康布铁堡组的重新厘定

何登峰1,2,李海平3,李玮1,2,徐静刚4,董云鹏1,2,柳小明1,2,陈隽璐5,徐学义5   

  1. (1.西北大学 大陆动力学国家重点实验室,陕西 西安710069;2.西北大学 地质学系,陕西 西安710069;
    3.陕西省地质矿产开发局 区域地质矿产研究院,陕西 咸阳712000;4.中国石油长庆油田分公司油田开发处,陕西 西安710018;
    5.中国地质调查局 西安地质调查中心,陕西 西安710054)
  • 出版日期:2014-09-10 发布日期:2014-09-12
  • 作者简介:何登峰, 男, 博士研究生, 1987年出生, 构造地质学专业, 主要从事区域大地构造研究工作。 Email:hedengfeng000@163.com。
  • 基金资助:

    中国地质调查局项目(1212011121093,1212010050503)。

Re-determination of the Kangbutiebao Formation in the Southern Margin of Altay, Xinjiang

HE Deng-feng1,2, LI Hai-ping3, LI Wei1,2, XU Jing-gang4, DONG Yun-peng1,2,
LIU Xiao-ming1,2, CHEN Jun-lu5, XU Xue-yi5   

  1. ( 1.State Key Laboratory of Continental Dynamics, Northwest University, Xi’an, Shaanxi710069,China;
     2.Department of Geology, Northwest University, Xi’an, Shaanxi710069,China;
    3. Regional Geological Survey of Shaanxi Bureau of Geology and Mineral Resources, Xianyang, Shaanxi712000,China;
    4. Department of oilfield development, Petrochina Changqing oilfield Company, Xi’an, Shaanxi710018,China;
    5. Xi’an Center of Geological Survey, China Geological Survey, Xi’an, Shaanxi710054,China )
  • Online:2014-09-10 Published:2014-09-12

摘要:

区域地质及野外地质剖面研究表明, 新疆阿尔泰南缘康布铁堡组的东、中、西3段岩石组合和变质变形及含矿性等方面存在显著差异, 有必要对其重新划分厘定。分布于西段克兰及麦兹盆地的康布铁堡组(D1k), 通过古生物化石及年代学资料确定其时代为早泥盆世, 实测地质剖面显示为一套浅变质酸性火山岩及火山碎屑岩夹正常碎屑岩, 自下而上可划分为4个岩性段: 笫1岩性段(D1ka)以云母片岩为主; 第2岩性段(D1kb)为钙质片岩、钙质砂岩、变凝灰质砂岩; 笫3岩性段(D1kc)主要为变酸性流纹岩、凝灰岩; 第4岩性段(D1kd)以变流纹岩、流纹质火山碎屑岩为主。而分布于东段青河地区、中段(南部)富蕴地区的康布铁堡组, 实为一套混合岩化变质岩系, 其时代缺少年代学资料限制, 应从康布铁堡组中解体出去, 依据进一步变质作用及年代学资料重新划分、命名。

关键词: 康布铁堡组, 泥盆系, 阿尔泰, 新疆北部

Abstract:

The Kangbutiebao Formation is distributed in the southern margin of Altay, Xinjiang. Based on the regional geology and geological section, this study holds the idea that the Kangbutiebao Formation should be redeterminated on account of the obvious differences in rock assemblages, metamorphic-deformation and ore-bearing potential among the eastern, middle and western parts. The age of Kangbutiebao Formation(D1k) which is located in Kelan and Maizi Basin is of Early Devonian according to the fossils and geochronology. Field measuring geological sections reveal that the D1k include acid volcanic rocks and volcaniclastic rocks interbedded normal clastic rocks (low-grade metamorphic). It can be divided into four lithologic units from bottom to top: the first lithologic unit (D1ka) is mainly of micaschist; the second (D1kb) contains calcareous schists, calcareous sandstones and meta-tuffaceous sandstones; the third (D1kc) chiefly comprises meta-acid rhyolite and tuff; and the fourth (D1kd) is mainly meta-rhyolite and meta-rhyolitic pyroclastic rocks. But the ‘Kangbutiebao Formation’ in Qinghe region (the eastern part) and Fuyun region (the southern section of the middle part) consists of high-grade metamorphic and migmatization rocks and is less of geochronology data, and it should be disintegrated from the D1k and be re-determinated and be renamed after the further study of metamorphism and geochronology in this area.

Key words: Kangbutiebao Formation, Devonian, Altay, north Xinjiang

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