摘要
准噶尔石炭纪—三叠纪经历了4次重要的气候事件,即晚石炭世降温事件、中二叠世温室事件、晚二叠世—早三叠世干旱事件和中—晚三叠世潮湿事件.古气候的发展往往有周期性,每个大的周期又常常是许多小的波动(小周期)发展积聚的结果,这种周期性变化与地球在太阳系中的位置、大气圈、海洋、极地冰川系统的变化、火山喷发以及块体位移有着紧密的联系.
The key climatic events of Carboniferous—Triassic in Junggar are discussed from endogenic aspects. Paleogeographic and paleotectonic changes occurred in Junggar during a long geological history about 150 Ma from Carboniferous to Triassic, from an open marine basin to uplifted land due to collision and orogeny with Siberia paleo-plate and Tarim paleo-plate. These changes have a significant effect on paleoclimates. Comparing with Tarim, Junggar has a clearer change of paleoclimate. Four phases of major climatic change in Junggar occurred during Carboniferous-Triassic, i.e., catathermal event of late Carboniferous, hothouse event of middle Permian, arid event of late Permian-early Triassic, humidity event of middle-late Triassic. The paleoclimate changes periodically, with each cycle consisting of numerous small undulations (sub-cycle). The periodical change is closely related to earth抯 position in the solar system, atmosphere, oceans, polar glaciers, volcanic eruption and plates?movement.
出处
《新疆地质》
CAS
CSCD
2002年第3期192-195,共4页
Xinjiang Geology
基金
国家自然科学基金项目(49862001)资助
