南昌梅岭花岗岩地貌景观特征及其形成发育规律

花岗岩地貌具有独有的景观特征和演化规律,本文对江西南昌梅岭地区新元古代花岗岩地貌景观特征、空间分布规律和成因演化规律进行了系统分析与总结。梅岭花岗岩地貌主要发育于新元古代花岗岩之上,并在岩性、区域断裂和气候控制的风化侵蚀作用下,逐步形成了以崩塌倒石堆积、石蛋为特色的花岗岩低山丘陵地貌;新生代以来,梅岭地区长期受到太平洋构造域和特提斯构造域的叠加影响,而发生构造抬升和剥蚀作用,且受区域断裂构造的控制明显,区内沟谷和瀑布景观主要沿NE、NNE和近EW三个方向发育。梅岭现代花岗岩地貌的发育肇始于始新世区域一级夷平面的分裂解体,并经历了两次构造抬升和剥蚀作用,逐步形成如今独具代表性的花岗岩低山丘陵地貌景观。

The granite landforms and evolution regularity in Mount Meiling, Nanchang

Granite landscapes present unique scenery characteristic and evolution regularity. This paper systematically analyzes and summarizes the features, spatial distribution regularity and genetic evolution regularity of Neoproterozoic granite landscape in Mount Meiling area, Nanchang City, Jiangxi Province. The current granite landscapes of Mt. Meiling are mainly developed on the Neoproterozoic granite with the geological process of weathering and erosion, which controlled by the lithological features, regional faults and climate, then gradually contribute to the granitic low hill landform, characterized by collapse and falling- stone accumulation and pebbly landform. Additionally, the Mount Meiling area has been affected by the superimposition of Pacific tectonic domain and Tethys tectonic domain since Cenozoic, which resulted in tectonic uplift and erosion, and which is obviously controlled by regional faults. The landscapes of canyon and waterfall in the studied area mainly developed along NE- , NNE- and nearly EW- trending structure. The development of modern granite landscapes of the Mount Meiling began with the disintegration of the first regional level planation surface of Eocene, and experienced at least two tectonic uplifting and erosion, gradually formed the typical granitic low hill landscape today.