contact alteration 中文意思是什麼
contact alteration
解釋
接觸蝕變作用- contact : n 1 接觸；聯系；交涉。2 〈美國〉（有勢力的）熟人；門路。3 【數學】相切；【電學】接觸；觸頭；觸點...
- alteration : n. 1. 變更，改變，變化。2. 【地質學；地理學】蝕變。3. 〈美方〉閹割。
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K - ar age of an illite from alteration rock in the contact zone around lianhuashan porphyry is 38. 6ma. with referencing to the main metallogenic period of yulong copper metallogenic zone and of ailaoshan gold metallogenic zone, it is suggested that the time of formation of deposits in the district studied is probably in a period of time from 38. 6ma at earliest to 20ma at latest. this time is equivalent to the origination time of two important tectonic events, i. e., lanping movement and the turning point when ailaoshan - red river fault turned from sinisteral into dextral
獲得了蓮花山巖體周圍接觸帶蝕變巖中伊利石k - ar年齡38 . 6ma ，參考玉龍銅礦帶和哀牢山金礦帶的主要成礦期（分別為30ma左右及26ma ） ，釐定本礦集區成礦年齡下限為38 . 6ma ，上限為20ma ，與兩次重要的構造事件?蘭坪運動的起始時間及哀牢山?紅河斷裂由左旋轉為右旋的時間相當。 -
It is why that i conduct the research. there are mainly five methods in the paper. ( l ) the dialectic materialism method : emphasize on variety and contact ; ( 2 ) the method of analyzing experience and demonstration : sum up experience by collecting, classifying, settling, concluding, and analyzing the statistical data. then find out general rules about alteration of investment structure ; ( 3 ) comparison and analysis method : find out the key reasons for the formation and alteration of investment structure by spatio - temporal comparison ; ( 4 ) systemic analysis method : regard investment as a whole organism and study its internal relationship and alteration. ( 5 ) static and dynamic method
本文的主要研究方法有五種：一是辨證唯物主義的方法，強調運動、變化和聯系；二是經驗實證分析方法，通過對大量統計資料的收集、分類、整理、歸納、分析，做出經驗總結，找出投資結構變動的一般規律;三是比較分析法，通過橫向（空間）和縱向（時間）比較，找到影響投資結構形成和變化的關鍵因素;四是系統分析方法，把投資結構作為一個由很多子系統構成的有機整體，研究其內部的聯系和變化;五是靜態分析和動態分析方法靜態分析是從某一時點考察投資結構變動的橫截面的狀態，這種方法通常用於產業關聯分析;動態分析則更強調考察投資結構的形成和演進的趨勢。 -
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
含礦地層及礦源層、構造-熱液作用、巖漿活動、變質作用都在不同程度上對區域成礦起作用，而花崗巖相變化帶、巖體內外接觸帶、構造?熱液疊加交匯帶、地層不整合接觸帶則為金礦化主要富集帶。
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