The main achievements obtained in this paper are as follows : 1 . some of new recognitions were obtained on such aspects as strata sequence , rock type , metamorphism , hydrothermal alteration and the sedimentary environment by the study on many profiles in this area , with discovery of volcanic rocks for the first time in ore - bearing strata and ore bodies 取的了如下主要成果和认识： 1 、通过对矿区地层多条剖面的研究，对地层的层序、岩石类型、变质作用、热液蚀变及原岩沉积环境有了新的认识，特别是在赋矿地层及矿体中首次发现了火山岩。
The stratums containing mine , tectonic - hydro thermally process , magma activity , alteration react to district mineralization in degrees . the belt of granite facies , the inside and outside contact belt of rock body , the joining belt of tectonic - hydro thermally superimposed , the stratum belt of unconformity contact are the main enrichment belt 含矿地层及矿源层、构造-热液作用、岩浆活动、变质作用都在不同程度上对区域成矿起作用，而花岗岩相变化带、岩体内外接触带、构造?热液叠加交汇带、地层不整合接触带则为金矿化主要富集带。
Lithosphere delamination is an important way for compositional and structural evolution of collisional orogens . geotectonic research , geophysical survey and geochemical analysis have revealed that the lithosphere of east qinling - dabie mountains had delaminated intensively in mesozoic . however , the extensive mesozoic metamorphism and magmatism have been weakly related to lithosphere delamination 构造地质研究地球物理探测和地球化学分析等都已揭示东秦岭-大别造山带曾在中生代发生岩石圈拆沉，但有关中生代变质作用和岩浆活动与岩石圈拆沉的内在联系研究却较为薄弱。
Based on a comprehensive review on research results of metamorphic rocks , the authors argue that the formation and exhumation of uhpm ultra - high pressure metamorphite experienced two stages , i . e . , cold slab subduction and exhumation during 240200ma , and lithosphere delamination and thermal exhumation during 196163ma . the rapid thermal exhumation , co - occurred with extensive regional metamorphism and intermediate - acidic magmatism , implied that the subducted slabs had broken off and delaminated . the 通过全面评述该区变质岩研究成果，作者认为：超高压变质岩的形成和剥露经历了240200ma的板片冷俯冲冷折返和196163ma的岩石圈拆沉热折返热折返伴随了广泛而强烈的区域变质作用和中酸性岩浆活动，指示板片断离拆沉的发生超高压变质岩
There are two stages to crux maifan stone ' s formation , the first stage is the forming stage of primary material , that is to say , the stage of mother rock formation , in this stage , the latter hypabyssal intrusive of crystallization fractionation and self - metamorphic process are an important factor to make sure them have many trace elements 麦饭石的形成中有两个阶段是十分关键的，第一个阶段是基本物质的形成阶段，即母岩的形成阶段。在这一阶段中岩浆分异结晶晚期的浅成侵入以及自变质作用，是保证其富含营养微量元素的重要条件。
Based on the regional geologic survey on the scale of 1 / 250 000 , coupled with geological , geochemical and geophysical investigations in some key regions , this dissertation summarized the tectonomagmatic evolution and mineralization of the mid - gangdise area . with respect to tectonic evolution , the gangdise belt has experienced a multi - stage evolutional history since mesozoic , including oceanic crust subduction , arc - continent collision , intracontinental subduction and collision , and strike - slip and block uplift 论文以新一轮1 ： 25万区域地质调查为基础，在对关键区段重点解剖的基础上，结合地球物理、岩石化学、地球化学、沉积作用、变质作用、构造演化和成矿作用的研究成果，对冈底斯中段的构造岩浆演化与成矿作了较系统的科学总结。
For the fe - 2 % c - 4 % v - 4 % mo - 5 % cr - x % w alloy system , the peak value of quenching appears in 950 - 1100 . the peak value increases with the increment of w . when the content of w is 2 % , the temperature of temper hardening is 550 . for the fe - 2 % c - 4 % v - 4 % mo - 5 % cr - 2 % w alloy , the appropriate quenching temperature can be controlled in 1000 1050 and the time of preserving heat is 12min 57 （原于百分比，人分析表明， mg的变质作用的产生是由于mg影响了合金元素的偏析，使得基体组织中合金元素含量增加，相当于使合金分配系数k更偏离于1 ，从而促进了形成缩颈、晶粒繁殖和成分过冷倾向。
