抚仙湖老鹰地太阳观测基地的地质概况与地震危险性初析  

General Geological Situation of Yunnan Observatory Base for Solar Observation at Laoyingdi on the Shore of Lake Fuxian

作　　者：张子雄[1] 楼柯[2] 

机构地区：[1]云南省地质科学研究所,云南昆明650051 [2]中国科学院国家天文台云南天文台,云南昆明650011

出　　处：《天文研究与技术》2008年第2期217-219,共3页Astronomical Research & Technology

摘　　要：云南天文台抚仙湖老鹰地太阳观测基地处于小江断裂带两侧分支的控制之下,但该基地址点的地质构造未见断裂错动。址点之东5000m,北1000m,南1500m,P1-P2β-C等地层未见缺失,组成由P2β玄武岩为核,P1、C等地层为翼的向斜构造。因此,该地块是断裂带中相对稳定的地质小块体,址点的地层为P1虎斑状灰岩、白云岩夹白云质灰岩是溶蚀岩层,应注意和防范抚仙湖水体的浪蚀对石灰岩本体的溶蚀等潜在的地质缺陷。虽说抚仙湖老鹰地太阳观测基地所处地块是地震活动带中相对稳定的地质块体,但它不能脱离小江断裂带西侧分支的控制,因此,在基建规划和实施中应作抗Ⅷ度地震的技术防范。The area, where the Yunnan Observatory Base for the Solar Observation will be situated in the Xiaojiang Faulted Zone, is no misplaced outcrop. The strata of P2β - C around the base place constitute a syneline with the core of P2β basalt and limbs of P1 and C earbonatite, and there is no hiatus. The area is relatively stable with the small mass even if in the faulted zone. Because the strata are composed of dissoluble rocks the geologic hazards caused by dissolution should be paid attention to. The base place lies at faulted zone so that building resistanted to 8th earthquake magnitude is necessary.

关 键 词：抚仙湖太阳观测基地 地质 地震 

分 类 号：P183.5[天文地球—天文学]