我国地质公园建设和发展调查

正如果提到黄山、庐山、云台山、嵩山,你的第一反应是什么?没错,它们是著名的旅游景点,但同时也是举世闻名的世界地质公园。10年前的2004年2月13日,在法国巴黎召开的联合国教科文组织会议上,我国8家国家地质公园被列入世界地质公园网络名录,成为首批25家世界地质公园大家庭中的成员。从2000年面世以来,我国的地质公园发展突飞猛进。迄今为止,已建立世界地质公园29处,国家地质公园184处,省级地质公园近300处,是世界地     

Late Cenozoic Geomorphology, Geochronology and Physiography of Yuntaishan in Southern Taihang Mountain, North China

The late Cenozoic geomorphic features and geochronologic data of the Zhingfang River catchment in the Yuntaishan World Geopark are studied. Several quarternary geochronologic methods, including electron spin resonance (ESR), optically stimulated luminescence (OSL), thermo-luminescence (TL) and U-series are presented in this paper. The results suggest that there are two planation surfaces, named as the Taihang surface which is a peneplain of Taihang stage formed during Oligocene or Oligocene to early-middle Miocene period, and Tang-hien surface which is a mature wide valley of Tang-hien stage formed during late Miocene-Pliocene or Pliocene-early Pleistocene period and probably ended prior to 2.2–2.6 Ma based on ESR dating. After the Tang-hien stage, the incision and aggradation of the river formed six stream terraces with heights of 3–5 m, 8–12 m, 22–24 m, 28–38 m, 50–62 m and 80–85 m above the river bottom, respectively. The dating results of the alluvium sediments suggest that these terraces were formed during Holocene, 20–23 ka B.P., 110–120 ka B.P., 200–240 ka B.P., 840–1200 ka B.P. or ~450 ka B.P. and 1600–1800 ka B.P. or ~1100 ka B.P., respectively. These results indicate that episodic incision of the river, which controls the formation of the scenery in the Yuntaishan World Geopark, was mainly influenced by the periodic dry-wet climate change during late Cenozoic mountain uplift.