• 日期: 2027-03-06 07:51:57
  • 标签: 教育

摘要：本文综述了祁连山构造演化的地质证据，通过对相关文献的综合分析，揭示了该地区的构造演化历史和影响因素。首先，介绍了祁连山的地质背景和构造特征。然后，详细阐述了祁连山的构造演化历史，包括中生代和新生代的构造事件。接下来，探讨了祁连山构造演化与青藏高原隆升的关系，并分析了其对区域地壳稳定性的影响。最后，讨论了祁连山构造演化与气候环境变化、矿产资源分布以及沉积演化等方面的关系。通过对以上内容的综述，为进一步研究祁连山构造演化提供了参考和指导。

关键词：祁连山；构造演化；地质证据；青藏高原；地壳稳定性；气候环境变化；矿产资源；沉积演化

Abstract: This paper reviews the geological evidence for the tectonic evolution of the Qilian Shan. By analyzing relevant literature, the geological history and influencing factors of the study area are revealed. Firstly, the geological background and tectonic features of the Qilian Shan are introduced. Then, the tectonic evolution history of the Qilian Shan is discussed in detail, including the tectonic events in the Mesozoic and Cenozoic. Next, the relationship between the tectonic evolution of the Qilian Shan and the uplift of the Tibetan Plateau is explored, and its impact on regional crustal stability is analyzed. Finally, the relationships between the tectonic evolution of the Qilian Shan and climate change, distribution of mineral resources, and sedimentary evolution are discussed. Through the review of the above content, this paper provides reference and guidance for further research on the tectonic evolution of the Qilian Shan.

Keywords: Qilian Shan; tectonic evolution; geological evidence; Tibetan Plateau; crustal stability; climate change; mineral resources; sedimentary evolution

Introduction The Qilian Shan is a mountain range located in northwest China, extending from the northeastern Tibetan Plateau to the Hexi Corridor. It is an important research area for understanding the tectonic evolution of the Tibetan Plateau and its surrounding regions. In recent years, numerous studies have been conducted to investigate the tectonic evolution of the Qilian Shan, and a wealth of geological evidence has been obtained. This paper aims to provide a comprehensive review of the geological evidence for the tectonic evolution of the Qilian Shan, including its geological background, tectonic features, and the influencing factors.

Geological Background and Tectonic Features The Qilian Shan is situated at the northeastern margin of the Tibetan Plateau, and it is characterized by complex tectonic features. It is bounded by the Qaidam Basin to the north and the Hexi Corridor to the south. The mountain range is composed of several parallel ranges, including the North Qilian Shan, South Qilian Shan, and West Qilian Shan. These ranges are separated by deep valleys and have experienced significant uplift and deformation throughout their geological history.

Tectonic Evolution History The tectonic evolution of the Qilian Shan can be divided into several stages, including the Mesozoic and Cenozoic. In the Mesozoic, the Qilian Shan was affected by the subduction of the Paleo-Tethys Ocean and the closure of the Mongol-Okhotsk Ocean. This resulted in the formation of several thrust belts and the emplacement of ophiolite complexes. In the Cenozoic, the Qilian Shan experienced further deformation and uplift due to the collision between the Indian Plate and the Eurasian Plate. This led to the formation of the Tibetan Plateau and the continued uplift of the Qilian Shan.

Relationship with the Uplift of the Tibetan Plateau The tectonic evolution of the Qilian Shan is closely related to the uplift of the Tibetan Plateau. The collision between the Indian Plate and the Eurasian Plate has led to the northward extrusion of the Tibetan Plateau, which has in turn influenced the tectonic deformation and uplift of the Qilian Shan. The interaction between these two processes has played a significant role in shaping the geological features of the study area.

Impact on Crustal Stability The tectonic evolution of the Qilian Shan has significant implications for crustal stability in the region. The uplift and deformation of the Qilian Shan have resulted in the development of active faults and seismic activity. Understanding the tectonic evolution of the Qilian Shan is therefore crucial for assessing seismic hazards and ensuring the safety of local populations.

Relationship with Climate Change The tectonic evolution of the Qilian Shan has also had an impact on climate change in the region. The uplift of the Tibetan Plateau and the Qilian Shan has affected atmospheric circulation patterns and precipitation distribution, leading to changes in climate conditions. This has important implications for regional ecosystems and water resources.

Distribution of Mineral Resources The tectonic evolution of the Qilian Shan has influenced the distribution of mineral resources in the region. The mountain range is rich in mineral deposits, including gold, copper, and coal. The tectonic deformation and uplift of the Qilian Shan have played a crucial role in the formation and preservation of these mineral resources.

Sedimentary Evolution The tectonic evolution of the Qilian Shan has also influenced the sedimentary evolution of the surrounding basins. The Jiuquan Basin, located to the south of the Qilian Shan, has recorded the tectonic and sedimentary history of the study area. Understanding the relationship between tectonic deformation and sedimentary processes is essential for reconstructing the geological history of the Qilian Shan.

Conclusion In conclusion, the tectonic evolution of the Qilian Shan is a complex process that has been influenced by various factors. Through the analysis of geological evidence, this paper has provided a comprehensive review of the tectonic evolution of the Qilian Shan, including its geological background, tectonic features, and the influencing factors. The research conducted in this area has significantly advanced our understanding of the tectonic evolution of the Tibetan Plateau and its surrounding regions. However, there are still many unanswered questions and further research is needed to fully understand the geological history of the Qilian Shan


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