南秦岭白水江—大河口一带“志留系”地质构造特征及金矿找矿方向

CHARACTERISTIC OF GEOLOGICAL STRUCTURE AND THE GOLD-SEARCHING SCOPE OF THE "SILURIAN SYSTEM" DISTRIBUTED FROM BAISHUIJIANG TO DAHEKOU,SOUTH QINLING, SHAANXI PROVINCE

本文通过剖面研究，将区内“志留系”自下而上粗划为下古生界第一套（Pz1a）、第二套（Pz1b）、下一中志留统（S1－2）、中泥盆统第一套（“D21”）、第二套（“D22”）共5套地层。重点介绍了多期多阶段形成的褶皱变形及剪切应变特征。认为剪切应力中心带及两侧出现的强直片岩和硅化强烈的脉岩带往往是金矿的找矿有利部位和标志。

Having researched some geologic section,we roughly divided the "silurian system"into five stratigraphic units,which distributed from Baishuijiang to Dahekou,from the bottom to the top,they are: the 1st unit of the lower paleozoic (Pz2),second unit of Pz2,lower-middle silurian unit,the 1st Unit of D2 and second unit of D2. In this paper,the features of fold and shear deformation, occured in these units, were mainly introducted. The shear concentrated zone, the belt of highly strained schist and the highly silicated vein rock occurenced beside the shesr zone were hold as a advantageous.