| 克什克腾世界地质公园青山花岗岩臼的特征及成因研究 |
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| 引用本文： | 孙洪艳,田明中,武法东.克什克腾世界地质公园青山花岗岩臼的特征及成因研究[J].地质论评,2007,53(4):486-490,I0003. |
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| 作者姓名： | 孙洪艳 田明中 武法东 |
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| 作者单位： | 中国地质大学地球科学与资源学院,北京,100083 |
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| 基金项目： | 本文为内蒙古自治区克什克腾地质公园科学研究项目（编号270304）和国家自然科学基金资助项目（编号49772134）的成果. 致谢：克什克腾旗人民政府和国土资源局在野外考察中给笔者等提供了诸多帮助和方便,谨向他们表示衷心的谢意.感谢中国地质科学院章雨旭研究员为笔者等提供了部分资料并对文章的修改提出了宝贵意见. |
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| 摘 要： | 内蒙古自治区克什克腾世界地质公园的花岗岩臼自发现以来,曾有过学者从冰川论（冰臼论）和风蚀论（壶穴论）的角度分别对其成因进行过研究。笔者等通过详细调查,将该地区的这种肚大口小、内壁具平行波状纹的花岗岩臼按其发育程度分为5类：萌芽型、初具外形型、发育中期型、成熟型和衰亡型。根据发育程度,结合岩石特征、构造条件、气候、地理位置等综合分析,认为该地区的花岗岩臼的形成经历了从萌芽→初具外形→发育中期→成熟→衰亡5个阶段,且北方高寒地区的花岗岩臼发育都受上述综合因素影响：花岗岩自身是一种易风化的岩石,在有水的条件下,特殊气候环境的差异风化作用促使花岗岩臼的萌芽,萌芽态的花岗岩臼在水、冻融作用、风蚀作用参与的差异风化下进一步发展,从初具外形到中期基本成型的岩臼,风蚀作用、冻融作用等物理风化是促使其进一步发展到完全成熟型的主要营力。
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| 关 键 词： | 花岗岩臼 冰臼 差异风化 世界地质公园 克什克腾 |
| 修稿时间： | 2007-01-222007-05-16 |
Characteristics and Origin of Granite Mortars in the Hexigten World Geopark |
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| SUN Hongyan,TIAN Mingzhong,WU Fadong.Characteristics and Origin of Granite Mortars in the Hexigten World Geopark[J].Geological Review,2007,53(4):486-490,I0003. |
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| Authors: | SUN Hongyan TIAN Mingzhong WU Fadong |
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| Institution: | School of the Earth Sciences and Resources, China University of Geosciences, Beijing, 100083 |
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| Abstract: | Since the discovery of the granite mortars in Hexigten World Geopark, different views on their origin have been reported. Now the main two views are "Moulin" and "Pothole". Based on detailed investigation and the development degrees of the granite mortars at the Mount Qingshan in the geopark, these granite mortars were categorized into the following five types, that is, (1) embryo stage, (2) initial stage, (3) middle stage, (4) mature stage and (5) extinct stage. And according to the development degree of granite mortars, combined to the lithologic features and structural condition of granite and climate and the geographic location of the research area, a new view on origin of the granite mortars in this area was put forward that all the granite mortars in the high latitude and cold area of north China were formed by the following process: from the embryo, initial, middle, mature to extinct stages. The original formation of the granite mortar is that the granite is easy weathered. Under the condition with water, the differential weathering of the special climate made the embryonic granite mortar formed. The embryonic granite mortar can develop into initial and middle granite mortars under the comprehensive actions containing differential weathering, water action, freeze-and-thaw action, aeolian erosion, chemical weathering and other actions. The main agency during the initial and middle granite mortars developing into the mature mortars is physical weathering actions such as the aeolian erosion, freeze-and-thaw action and so on. |
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| Keywords: | Hexigten World Geopark granite mortar moulin differential weathering |
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