苏皖北部地区晚元古代地层的马尔柯夫链分析

本文运用数学地质理论中的马尔柯夫链分析方法,对苏皖北部地区及鲁西南地区晚元古代地层进行了初步研究。文中选择6条比较典型的剖面,分别对它们进行了转移概率、极限概率、差值阵、置换分析和熵分析等方面的计算,并对所得结果做了相应的地质解释。分析结果,从定量方面揭示出了晚元古代时期苏皖海盆基底的“波动”史及其上覆地层的主要沉积韵律类型,以及盆地内不同部位、不同时代岩性变化的主要趋势及其阶段性;并认为,在晚元古代早期苏皖海盆中很可能同时存在有南、北两个沉积中心,而并非像以往所认为的那样,只有一个沉积中心。

MARKOV CHAIN ANALYSIS OF THE UPPER PROTEROZOIC STRATA OF NORTHERN JIANGSU AND ANHUI PROVINCES

Markov chain probability analysis theories have gained much attention among geologists in recent times. The usage of Markov chain analysis has been utilized to study six sections of the Upper Proterozoic Erathem Formation in northern Jiangsu and Anhui provinces. The Markov chain analysis method provided useful information for further research in the future.The result of the study shows the main rhythm and sedimentary cycle patterns. Further more,the study reveals a wavelike motion of the base of the Su-wan Basin during the late Proterozoic Era. The study aiso indicated localities where sediments were deposited including structural characteristics and movements during the corresponding sedimentary period to determine the rhyhms and cycles of sedimentation developed completely and symmetrically. Jeneraily speaking, the sediments which were deposited neat the sedimentary centres were more completely and symmetrically developed and the cycles were characterized by a higher and more stable sedimentary system.