Secondly, explain the genesis of South China landform with in-situ remelting theory. It is pointed out that from the late Mesozoic to the early Cenozoic, the effect of the Pacific plate on Eurasia gradually weakened, and the remelting layer in the crust of South China gradually consolidated to the southeast. Accordingly, the surface has experienced four stages of development: granite dome-hill-faulted basin-quasi-plain-quasi-plain disintegration and fault block landform, in which the remains of the second and third stages (red beds and planation planes respectively) still maintain modern fault block landform, and the article "South China Coast" was published. Professor Chen Wu commented: "I have been studying the topography and geological period of North China for nearly ten years, and I have come into contact with many new foreign theories, such as equilibrium theory and geodynamic model. But you are the first theory about leveling in China, which represents the development level of geomorphology theory in China, so we should innovate, not fail to keep up with foreign countries. ..... On the basis of the study of topography and geomorphology in North China, I also want to discuss some current geomorphological theories. But what I have seen are all foreign theories, and there is no domestic theory. In-situ remelting theory and material circulation, I think, are the only theoretical basis of China geomorphology. " Professor Chen Wu included the above research ideas and achievements in the book History of the Development of Mountain Topography in North China (Hebei Science and Technology Press, 1999).
Professor Zeng, a geographer, commented: This study fills the gap in the study of geomorphological evolution and deep crustal process, and puts forward innovative theoretical viewpoints on a series of problems such as fault basins, planation planes and the formation of fault block structures in various parts of Guangdong.
3. It is found that all large water systems bypass the flow of granite. It is considered that the granite body was originally a prominent part of the remelting layer, which was a "granite dome" before denudation and formed a granite dome after denudation. The phenomenon that high-water rivers (Grade IV and above) flow from granite shows that these rivers were first formed, and most of them flowed into the nearby red bed basin in the second stage. In the fourth stage, the coastal land in South China rose, and the basin disappeared, and these ancient rivers became outflow rivers. Although it has gone through the quasi-plain stage (the third stage), it still continues the basic pattern of granite domes and hills flowing outward so far, laying the imprint of the above-mentioned first stage. He published a paper "Discussion on the Origin of Water System from the Formation Mechanism of Mesozoic Granite —— Taking the Lower Pearl River as an Example".
Fourthly, the relationship between volcanic activity and basin evolution is discussed. The research shows that the volcanic active period corresponds to the lake expansion period, and the volcanic quiet period corresponds to the river development period. Write a paper on the Relationship between Paleogeographic Environment and Volcanism in Sanshui Basin, Southeast China (to be published).
5. A new understanding of the origin of hot springs in South China is put forward, and it is considered that hot springs in South China are mainly controlled by topographic contrast and extensional neotectonic faults. The former mainly controls the temperature and flow of spring water, while the latter mainly controls the highest possible water temperature of hot springs, and publishes a paper "Discussion on the Causes of Hot Springs in Coastal Areas of South China".