A comprehensive quantitative recovery method for a lake deposition environment

Abstract

The invention discloses a comprehensive quantitative recovery method for a lake deposition environment. The comprehensive quantitative recovery method comprises the following steps: (1) selecting paleo-climate, paleo-salinity, oxidation-reduction property, an ancient material source and paleo-water depth as indexes for recovering the deposition environment; (2) extracting the rock core sample, andobtaining elements, total rock minerals and X fluorescence spectrum element data; (3) respectively carrying out Z standardization processing on the indexes of the paleoclimate, the paleosalinity andthe oxidation-reduction property by applying SPSS software; (4) carrying out factor analysis on paleo-climate, paleo-salinity and redox indexes subjected to Z standardization treatment by applying SPSS software; (5) calculating an ancient material source factor and an ancient water depth factor; And drawing a comprehensive quantitative recovery map of the deposition environment. According to the method, the limitation of a single recovery method can be overcome to a certain extent, and meanwhile, the trend of environment change is more obvious. The whole method is high in operability, the actual problem in the scientific research process is solved, a foundation is provided for subsequent geological research, and practical significance is achieved.

Description

technical field [0001] The invention relates to a comprehensive quantitative recovery method for lake depositional environment, which belongs to the field of depositional environment. Background technique [0002] Environment is a concept in geography. The earth's surface is divided into different geographical units, such as mountains, rivers, lakes, deserts, oceans, etc., which are natural geographical environment units, that is, landform units. The natural geographical environment in which deposition occurs is called the depositional environment. A sedimentary environment is a sedimentary geomorphic unit with unique physical, chemical, and biological characteristics that distinguish it from adjacent areas. The depositional environment includes elements such as natural geographical conditions, types of lake basins, climate conditions, physical and chemical conditions of depositional media, etc. Lake sediments record a wealth of information on various environmental elemen...

AI Technical Summary

Problems solved by technology

The advantage of the isotope method is that it has universal standards and avoids local limitations, but the metasomatism after deposition often changes the ratio of isotopes, especially oxygen isotopes, which is low in reliability for old formations

Palynology is the most common method in paleoclimate research, but due to the lag in the response of terrestrial vegetation to climate change, the time resolution of palynology is usually greater than 100 years

Images