赣东北三清山地区花岗岩的类型与“三清山式”花岗岩峰林的成因

The granite types and the formation of "Sanqingshan-type" granite peak forest in the Sanqingshan area, northeastern Jiangxi, China

对世界自然遗产地三清山及其外围地区的花岗岩地质与花岗岩地貌的科学价值作进一步讨论,认为:①三清山及其外围的怀玉山燕山期花岗岩区可划分为3型(扬子型、南岭型、沿海型)、4式(铜厂式、银山式、三清山式、灵山式),它们具有鲜明的成矿与造景的专属性。②三清山花岗岩原态保留较好,形成于燕山陆内造山末期,是南岭型花岗岩演化至最后阶段形成的超酸性碱长花岗岩的典型代表。③三清山式花岗岩地貌为典型的水蚀型幼年期到壮年期早期的峰林地貌,以山峰尖峭和石柱、石锥、石芽发育完美为标志。④三清山式花岗岩峰林地貌的形成是年青的超酸性岩石、岩体与围岩差异风化,节理发育,雨水丰沛,受控于仍在缓慢抬升的"三角形""隆上隆"断块构造等诸因素最佳耦合的产物。

This paper had given a further discussion on the scientific value of granite geology and landform of the Sanqingshan World Natural Heritage Site and its surrounding areas, and put forward that Yanshanian granites in the Huaiyushan scenic spot can be categorized into three patterns, namely： Yangtze-pattern, Nanling-pattern, and coastal-pattern; four types： Tongchang-type, Yinshan-type, Sanqingshan-type and Lingshan-type, which respectively have the unique specialty of metallogenesis and building-landscape. San-qingshan granite with well-preserved original state was formed in the last stage of intracontinental orogeny, being a typical representa- tive originated from the evolution of Nanling-type granite to the last stage. Sanqingshan granite landform is characterized by the typi- cal aqueo-peak forest landform ranging from youthful to early-mature, featured by the pinnacle, stone pillar, stone cone and stone sprout. The Sanqingshan-type granite peak forest landform is the best coupling product which resulted from such factors as the differ-entiation weathering of young ultra-acid rock, rock body and wall rock, well-developed joints, abundant rain water, and controlled by the further slowly uplifting ＂triangular block＂ and ＂uplift on uplift＂ block structure under the background of Mesozoic regional structural uprising.