多元统计分析在地质学中的应用--以惠州凹陷M层物源分析为例  

Application of multivariate statistic analysis in geology:A case of provenance analysis in the M Strata,Huizhou Depression

作　　者：余烨[1] 张昌民[1] 李少华[1] 朱锐[1] 杜家元[1,2] 王莉 

机构地区：[1]油气资源与勘探技术教育部重点实验室、长江大学地球科学学院,武汉430100 [2]中海石油中国有限公司深圳分公司,广州510240 [3]中石化胜利油田胜利采油厂,山东东营257061

出　　处：《地质科学》2014年第1期191-201,共11页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家“十二五”重大专项(编号:2011ZX05023-002)资助

摘　　要：以29口钻孔的重矿物百分含量数据来分析样本,通过Q型聚类分析、因子分析方法恢复不同物源体系的发育范围及其母岩类型,并以不同物源体系的边界范围为限定条件,结合ZTR指数及其等值线图,对珠江口盆地惠州凹陷M层物源特征进行了系统的研究。研究结果表明:研究区发育3大物源沉积区,分别为东北—北部物源沉积区、西北物源沉积区和东南物源沉积区,且各区重矿物组合特征明显,主次物源分明,整体表现为母岩类型复杂的特征。东北—北部沉积物主要母岩为酸性岩浆岩,次要母岩为变质岩和沉积岩;西北沉积物主要母岩为中性及基性岩浆岩,次要母岩为酸性岩浆岩和变质岩;东南沉积物主要母岩为中性及基性岩浆岩,次要母岩为变质岩。东北—北部物源区和西北物源区为远源沉积的产物,而东南物源区为近源沉积的产物。东北—北部物源区沉积物来自北方和东北方向,而西北物源区和东南物源区沉积物分别来自西北方向和东南方向。Based on the heavy minerals content of 29 drilled wells, the boundary of the sediment source area and the type of the mother rock in the M strata of the Huizhou Depression of the Pearl River Mouth Basin was recognized by Q-type cluster analysis and factor analysis. Determined by the boundary of the distinct sediment source area, the sediment source characteristics in the M strata of the Huizhou Depression of the Pearl River Mouth Basin was analyzed making use of ZTR index and ZTR isoline. The results show that there are three distinct sediment source areas in the M strata in the study area： The northeast-northern sedimentary area, the northwest sedimentary area and the southeast sedimentary area. The heavy mineral characteristics of different sedimentary areas are very obvious, and the primary source and the secondary source of different sedimentary areas are easy to identify. As a whole, the types of the mother rock are complex. The types of the mother rock in the northeast-northern area are mainly acidic magmatic rock,metamorphic rocks and sedimentary rocks are secondary; there are mainly neutral-basic magmatic rock in the northwest area,the acidic magmatic rock and metamorphic rocks are secondary; there are mainly neutral-basic magmatic rock in the southeast area, the metamorphic rocks are secondary. The principal source of detritus in the northeast-northern and northwest sedimentary area was derived from the distal sedimentation, and the principal source of detritus in the southeast sedimentary area was derived from proximal sedimentation. The source of the northeast-northern sedimentary area came from north direction and northeast direction while the source of the northwest sedimentary area came from northwest direction and the source of the southeast sedimentary area came from southeast direction.

关 键 词：惠州凹陷 物源分析 多元统计分析 聚类分析 因子分析 

分 类 号：P512.2[天文地球—地质学]