本文選題：青城子地區(qū)　切入點(diǎn)：雙頂溝-新嶺巖體　出處：《吉林大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：時(shí)至今日,無論從人類生產(chǎn)發(fā)展對(duì)礦產(chǎn)資源的迫切需求,還是從科學(xué)找礦理論的成熟度、深部地球物理探測(cè)方法和對(duì)技術(shù)的掌握等不同角度來看,我國(guó)已然進(jìn)入了深部地質(zhì)找礦這一復(fù)雜的綜合性找礦工作階段。在這一階段,地質(zhì)研究與找礦工作的技術(shù)手段已經(jīng)逐步實(shí)現(xiàn)由平面二維向立體三維過渡,而三維的地質(zhì)體建模就是匯總整合所有深部地質(zhì)調(diào)查資料對(duì)其進(jìn)行立體表達(dá)。本文在前人對(duì)青城子地區(qū)晚三疊世巖漿侵位地球化學(xué)角度研究的基礎(chǔ)上,選取與該地區(qū)鉛鋅金銀多金屬成礦密切相關(guān)的雙頂溝巖體和新嶺巖體為研究對(duì)象,在詳細(xì)的野外地質(zhì)調(diào)查基礎(chǔ)上,提取重磁異常、電磁測(cè)深剖面異常的特征標(biāo)志,研究異常組合的綜合效應(yīng),標(biāo)定侵入巖體地下賦存部分形態(tài)及主要分支的延展方向,獲得侵入巖體在地表投影的最大賦存范圍及深部邊界基本輪廓。這些工作有利于總結(jié)青城子地區(qū)巖漿熱液型礦床的深部成礦規(guī)律,并取得了以下主要認(rèn)識(shí)和成果:(1)根據(jù)重、磁、電的測(cè)量及反演結(jié)果,結(jié)合基礎(chǔ)地質(zhì)信息的約束,可以對(duì)巖體隱伏部分的形狀和性質(zhì)進(jìn)行綜合推斷與解譯。構(gòu)建了巖體深部形態(tài)的格架。(2)晚三疊世雙頂溝巖體邊界普遍發(fā)生外傾現(xiàn)象,臨近巖體的遼河群地層之下存在大面積隱伏。新嶺巖體深部隱伏部分與雙頂溝巖體連通,是作為巖基產(chǎn)出的雙頂溝巖體的巖枝部分。(3)青城子地區(qū)的鉛鋅金銀礦床具有分布成帶的特征,晚三疊世巖漿活動(dòng)事件為區(qū)域成礦提供了有利條件。(4)初步總結(jié)了青城子地區(qū)的深部成礦規(guī)律,對(duì)該區(qū)的隱伏找礦工作提供參考依據(jù)。
[Abstract]:Today, whether from the urgent demand for mineral resources from the development of human production, or from the maturity of scientific prospecting theory, the deep geophysical exploration methods and the mastery of technology, and so on, China has entered the stage of complex comprehensive prospecting of deep geological prospecting, in which the technical means of geological research and prospecting have gradually realized the transition from plane two-dimensional to three-dimensional. The three-dimensional geological body modeling is to collect and integrate all the deep geological survey data to express it. This paper is based on the previous study of the late Triassic magma emplacement geochemistry in Qingchengzi area. The Shuangding gully and Xinling rock bodies, which are closely related to the lead-zinc gold and silver polymetallic mineralization in this area, are selected as the research objects. On the basis of detailed field geological investigation, the characteristics of gravity and magnetic anomalies and electromagnetic sounding profile anomalies are extracted. The synthetic effect of anomalous assemblage is studied, and the shape of underground occurrence and the extension direction of main branches of intrusive rock mass are calibrated. The maximum range of projection of intrusive rock mass on the surface and the basic outline of deep boundary are obtained. These works are beneficial to summing up the rules of deep mineralization of magmatic hydrothermal deposits in Qingchengzi area, and have obtained the following main knowledge and results: 1) according to gravity and magnetism, Electrical measurements and inversion results, combined with the constraints of basic geological information, The shape and properties of the concealed part of the rock mass can be inferred and interpreted synthetically. The framework of the deep form of the rock mass. 2) the boundary of the late Triassic Shuangding ditch rock mass is generally extroverted. Under the strata of Liaohe Group adjacent to the rock mass, there is a large area of invisibility. The deep concealed part of the Xinling rock body is connected with the Shuangding gully rock mass. The lead-zinc gold-silver deposit in Qingchengzi area is characterized by distribution and zonation. The late Triassic magmatic events provide favorable conditions for regional metallogeny. 4) the deep metallogenic regularity of Qingchengzi area is preliminarily summarized, which provides a reference for the concealed prospecting work in this area.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P628;P631

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