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《Geological Review》 2017-05
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The Characteristic and Formation Mechanism of Granitic Rock Eggs in the Meiling Mountain,Nanchang

LI Zhiwen;GUO Fusheng;SUN Li;HUANG Baohua;Key Laboratory for digital land of Jiangxi Province;School of Earth Sciences,East China University of Technology;  
The Meiling Mountain is mainly composed of Upper-Proterozoic granite.After long-term tectonic uplift and weathering erosion,the mountain landscape is displaying jagged ridge or ridge combining with erosion valley,among which the representative landscape is stacked stone with different size and roundness,widely distributed at the peak,or in the valley and on the hillside.To its formation mechanism,previous studies used to consider it as glacial gravel or talus.Based on the distribution and characteristic of granitic rock,we considered it as granitic stone eggs,including buried stone eggs and exposed stone eggs.The wide distribution of stone eggs suggests that the granite landform evolution is at the stage of late juvenile to youth.The formation mechanism is closely related to the geological tectonic movement and hot-humid climate conditions within the areas.The exposed stone eggs mainly attribute to the exposure of buried stone egg,and spherical weathering of granite stone and talus,the stone eggs in the valley mainly derive from the combined interaction results of disintegration of exposed granite rock,outcropping of buried stone egg after soil collapse,flood carrying,seasonal freezing and thawing,as well as their rolling movement along the slope.,The buried stone eggs mainly attribute to the differential weathering at different depth within the granite by temperature and precipitation,under the control of the inner fracture and joint of the granite.
【Fund】: 国家自然科学基金资助项目(编号:41571007);; 江西省数字国土重点实验室开放基金资助项目(编号:DLLJ201511);; 东华理工大学地质资源经济与管理研究中心开放基金资助项目(编号:14JC01);; 梅岭地质灾害实习基地建设项目的成果~~
【CateGory Index】: P588.121;P931
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