环状构造

本文提出的在GIS环境下实现的分形奇异值分解（MSVD）异常重建方法，不仅可以提取地球物理和地球化学等异常，而且能够进一步刻画其中的线性和环状构造、细微的局部纹理结构特征。

The fractal singular-value-decomposition ( MSVD ) in GIS environment developed in this study is demonstrated superb in extracting linear and circular geophysical and geochemical anomalies as well as the detailed structural and textural information from 2D geochemical and geophysical maps .

该区的成岩成矿受NNE、NE、SN、EW、NW走向构造带和环状构造的控制非常明显。其中SN与NW走向构造带与成矿关系最密切。

It is obvious that the mineralization and diagenesis are controlled by circular structures and tectonic zones which strike in NNE , NE , SN , EW and NW direction respectly , especially those tectonic zones in SN and NW direction have strongest relationship with mineralization in the study area .

线性构造与环状构造在工程地质研究中的实践意义

The practical significance of linear structures and circular structures

因此，进一步深入研究线性构造、环状构造，具有重要的实际意义。

Therefore , It has a very important practical significance to study the theory of the linear structures and circular structures .

通过遥感图像地质解译，发现崇安地区存在一较大的环状构造。

A large ring structure has been discovered in chong'an region on the basis of geological interpretation of remote sensing images .

经区域地质分析和野外验证，该环状构造始成于加里东期，以后又有多次活动，燕山晚期活动最强。

The data acquired from analysis of regional geology and in-situ investigation indicate that the ring structure is initiated during caledonian and activated for several times afterwards ;

在遥感影象图中，杂岩体与深部相连的同期岩体共同组成复合环状构造，并受北东向断裂和更大的环形断裂控制。

The remote sensing images reveal that the complex and the deeply interconnected contemporaneous rock bodies compose jointly a composite ring structure controlled by NE trending deep bigger faults .

提出了铀及多金属的矿化特点：铅、锌成矿最早，产于边缘环状构造带外侧；

Depression It puts forward a lot of mineralized features of uranium and multimetals : Lead and zinc mineralized earliest , occurring on the outside of the marginal circular texture zone ;

本区金矿床、矿田的定位模式为控金断裂与北东东向断裂相交，发育与岩浆活动有关的环状构造，并有金源层分布的地段。

The emplacement model of gold deposit and gold field in the study area is the place where the gold-controlling fault and NEE - trending fault intersect , the magmatism-related circular structures are developed and the gold source rocks are present .

本文研究的是金厂18号矿体，陈锦荣等（2000）研究表明此矿为岩浆穹隆型，主要受环状构造控制，应以构造蚀变岩型模式找矿。

18 ore body is studied by this paper , and this ore body is suggested to be one of the mathematic dome rock type by Chen Jing-rong , controlled by the ring structure , so it should use the prospecting model of orthophyric tectonic altered rock-type .

福建德化&永泰巨型环状火山构造成因探析火山灰和火山岩在喷射口堆积构成了火山。

Explore and analyse the cause of the volcanic struction of Fujian Dehua-Yongtai huge ring volcanic structure volcanic ash and lava build the mountains that we call volcanoes .

泺口边滩大型环状滑塌构造是在一种近水平条件下形成的，滑塌坡度为0.745°，滑塌是以多米诺骨牌方式实现和完成的。

The structures studied here are developed in a horizontal surface with the collapse gradient of 0.745 degree , and they are developed and accomplished in a " domino " manner .

根据几何学特征及运动要素，可以将大型环状滑塌构造分为3个部分：主体带、过渡带和消失带。

These structures can be divided into three parts : the main body belt , the transitional belt and the vanishing belt accord - ing to the geometrical characters and the kinematical elements .

根据断裂构造（包括线性断裂、环状和弧形断裂构造）、地层、冻融带及蚀变带的解译，总结了西天山地区金矿成矿环境和成矿条件。

According to image interpretation of fault structure ( including linear fault , circular and arcuate faults ), the strata , the freezing melting zone and the alteration zone in combination with field investigation , the gold metallogenic environment and conditions are summarized .

对阿希金矿床高精度磁测结果分析，发现了环状磁异常，它是火山岩地区控矿构造&环状构造的反映。

Based on the analytical results of high precision magnetic measurement for gold deposit in Asi area , a circum-shape magnetic anomaly was found , which is the reflect of circum structures , i. e.