深圳大鹏半岛国家地质公园海岸带地质特征及演化

Characteristics of Geological Relics Along the Coast of Shenzhen Dapeng Peninsula National Geopark

深圳大鹏半岛国家地质公园是华南地区侏罗纪海岸的典型代表。公园海岸线长约13公里,海岸线呈舌状向东突出,出露有中泥盆世砂岩、晚侏罗世流纹岩,发育有海蚀崖、海蚀洞、巨砾滩等十余处典型地貌景观,记录了2万年以来华南地区东部海岸的历史演化。本文系统调查了海岸带地质遗迹的特征,认为本区海岸带的演化共经历了泥盆纪~中生代、早新生代、晚新生代三个地质演化时期,其中泥盆纪~中生代地质活动决定了岩性基础,早新生代奠定了地质地貌基本架构,晚新生代的地质及海蚀作用塑造了本区典型地貌景观。

The coast of Shenzhen Dapeng Peninsula National Geopark is a representative of the Jurassic coast of South China. The coastline of the park is about 13 kilometers long, which is tongue-shaped and protruding to the east. This area reveals Middle Devonian sandstone and Late Jurassic rhyolite, and has developed more than ten landscapes, such as sea cliffs, sea caves, and sea erosion arch bridges, recording the historical evolution of the eastern coast of South China over the past 20,000 years. In this paper, the characteristics of coastal zone geological relics are systematically investigated, and it is concluded that the evolution of coastal zones in this area has undergone three geological historical stages: Devonian to Mesozoic, Early Cenozoic and Late Cenozoic, among which the geological activities of Devonian to Mesozoic determine the lithological foundation, the early Cenozoic has laid the basic structure of geological landforms, and the geology and sea erosion of the late Cenozoic era have produced typical geomorphological landscapes in the region.