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Method for determining continental lake basin ancient wind direction through sedimentary system distribution pattern

A technology of sedimentary system and sedimentary facies, applied in the field of geological research, which can solve the problems of inapplicability and little significance for the restoration of ancient wind direction

Active Publication Date: 2021-08-24
XINJIANG UNIVERSITY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of prior art 1: This scheme is mainly aimed at beach-bar sedimentary bodies, and is not applicable to other sedimentary systems
[0005] Shortcomings of the second prior art: this research method is suitable for measuring paleowind force, and has little significance for the restoration of paleowind direction

Method used

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  • Method for determining continental lake basin ancient wind direction through sedimentary system distribution pattern
  • Method for determining continental lake basin ancient wind direction through sedimentary system distribution pattern
  • Method for determining continental lake basin ancient wind direction through sedimentary system distribution pattern

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] Taking Qinghai Lake and surrounding areas as an example to illustrate

[0056] Step 1: Determine the horizon of the area to be restored in the Qinghai Lake area. Literature research and data collection include (1) research on the geographical location, geological background, structural development, and stratum distribution characteristics of Qinghai Lake; (2) field research study.

[0057] Step 2: Determine and analyze the sedimentary system around Qinghai Lake. The sedimentary facies and sedimentary subfacies around Qinghai Lake are determined according to the facies markers. Fluvial facies, deltas, alluvial fans, fan deltas, coastal zones, eolian dunes and beach bars appear around Qinghai Lake, and the sedimentary facies and subfacies are statistically described Characteristics.

[0058] Determination of sedimentary facies and sedimentary subfacies around Qinghai Lake:

[0059] 1. Alluvial fan:

[0060] In the Gangcha sand mining field near Gangcha County, sedimen...

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Abstract

The invention provides a method for determining a continental lake basin ancient wind direction through a sedimentary system distribution pattern. The method comprises the following steps: (1) determining a to-be-recovered region and a layer position; (2) determining and analyzing a deposition system of a to-be-recovered area; (3) summarizing a distribution rule of a deposition system and summarizing phase combinations of different positions; and (4) determining the ancient wind direction of the to-be-recovered region by using a sedimentology method. According to the method, through ummarizing and analyzing a stratum, a horizon, a sedimentary facies and a sedimentary subfacies in a to-be-recovered region, the sedimentary facies are combined and summarized and divided into different orientations, and main sedimentary facies of the different orientations are summarized; and hydrodynamic force and energy in different directions in the area are analyzed based on the sedimentology theory, so that the ancient wind direction is recovered.

Description

technical field [0001] The invention relates to the technical field of geological research, in particular to a method for determining the paleowind direction of continental lake basins through the distribution patterns of sedimentary systems. Background technique [0002] Global climate change is a hot topic in scientific research today. Restoring paleoclimate and paleoenvironmental change information is the basis for studying future climate and environmental evolution. Tertiary terrestrial faulted lake basins in eastern China, such as the Bohai Bay Basin, are similar to Qinghai Lake in both the geological structure of the faulted lake basin and the saline-brackish water environment. In modern times, domestic and foreign scholars proposed to use the "source-sink" system as a research idea to analyze the dynamic process of surface sedimentation. Taking the determination of the paleowind direction of the lake basin of Qinghai Lake as an example, the study of the modern sedim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 胡晨林
Owner XINJIANG UNIVERSITY
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