[1]陈忠良,马 雷.浅覆盖区第四系三维地质结构模型不确定性分析——以运漕幅离散钻孔为例[J].华东地质,2017,38(03):210-217.[doi:10.16788/j.hddz.32-1865/P.2017.03.007]
　CHEN Zhong-liang,MA Lei.Uncertainty analysis of 3D Quaternary geological structural model under a shallow cover, with the discrete boreholes in Yuncao map as an example[J].East China Geology,2017,38(03):210-217.[doi:10.16788/j.hddz.32-1865/P.2017.03.007]
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浅覆盖区第四系三维地质结构模型不确定性分析——以运漕幅离散钻孔为例()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
38
期数:
2017年03期
页码:
210-217
栏目:
地质信息
出版日期:
2017-09-15

文章信息/Info

Title:
Uncertainty analysis of 3D Quaternary geological structural model under a shallow cover, with the discrete boreholes in Yuncao map as an example
文章编号:
2096-1871(2017)03-210-08
作者:
陈忠良1; 马 雷2
(1. 安徽省地质调查院,合肥 230001; 2. 合肥工业大学资源与环境工程学院,合肥 230009)
Author(s):
CHEN Zhong-liang1;  MA Lei2
(1. Geological Survey of Anhui Province, Hefei 230001, China; 2. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China)
关键词:
三维地质模型;  第四系;  不确定性;  地统计学;  置信度指数
Keywords:
3D geological model;  Quaternary;  uncertainty;  geostatistics;  Confidence Index
分类号:
P628+.3
DOI:
10.16788/j.hddz.32-1865/P.2017.03.007
文献标志码:
A
摘要:
针对以离散钻孔为主要数据源建立的第四系三维地质结构模型,采用地统计学方法以置信度指数定量评估三维地质结构模型的不确定性。通过分析目标地层顶面趋势,获取其地质复杂度信息; 利用半方差函数模型分析目标地层顶面的空间自相关性,获取其数据精度信息; 结合专家经验,以置信度综合评估模型的不确定性。以运漕幅第四系三维地质结构模型为例,分别绘制早—中更新世青弋江组(Qp1-2qy)与中—晚更新世大桥镇组(Qp2-3d)顶面高程与置信度指数图。结果表明,钻孔位置和运漕幅右下角钻孔密集处的置信度指数较高,图幅边缘及地层缺失处的置信度指数偏低。置信度指数与钻孔数据精度呈正相关,与地质复杂度呈负相关。置信度指数可为以离散钻孔为主要数据源建立的第四系三维地质结构模型的不确定性分析提供量化工具。
Abstract:
The Confidence Index of geostatistic method is used to quantitatively evaluate the uncertainty of Quaternary geological structural model that is established mainly based on discrete boreholes. The geological complexity information was obtained using trend analysis of the top surface of the target strata, and the data accuracy information was obtained according to the spatial autocorrelation of the top surface of the target stratum with semi-variance function analysis. Expert experience was also considered for comprehensively assessing the uncertainty in the form of confidence coefficient. The three-dimensional(3D)Quaternary geological structural model of the Yuncao area was taken as an example, and the elevation and Confidence Index maps of the top surfaces of Qp1-2qy and Qp2-3d were plotted in this study. The results show that the Confidence Index in the areas near boreholes or with dense boreholes is obviously high, and low in the areas near map edge or in stratum absence. The Confidence Index is positively correlated with borehole data accuracy, and is negatively with geological complexity. The Confidence Index provides a tool for quantitatively assessing the uncertainty of 3D Quaternary geological structural model established with discrete boreholes.

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备注/Memo

备注/Memo:
*收稿日期:2016-07-06 修订日期:2016-09-23 责任编辑:谭桂丽
基金项目:中国地质调查局“1:5万和县等五幅区调(立体地质填图示范)(编号:1212011120847)”资助。
第一作者简介:陈忠良,1984年生,男,工程师,主要从事地质调查与地学信息技术研究。
更新日期/Last Update: 2017-09-19