本文選題：新疆阿拉套山 + 阿爾夏提��； 參考：《中國地質(zhì)大學(xué)(北京)》2015年碩士論文

【摘要】：阿拉套山位于中國新疆北西部與哈薩克斯坦國界附近,境內(nèi)外地質(zhì)背景和成礦地質(zhì)條件相似,形成了大量的金屬、非金屬礦產(chǎn)資源。但由于其地處邊境,研究程度極為有限,本文對前人資料進(jìn)行了整合,并結(jié)合野外實地地質(zhì)考察對阿拉套山東段的侵入巖活動特征進(jìn)行梳理,以期得到更為綜合的認(rèn)識。通過區(qū)域地質(zhì)對比,突出強(qiáng)調(diào)了米爾其克斷裂的重要意義。即以米爾其克斷裂為界,分為東、西二段。二者在地層、構(gòu)造、巖漿巖及成礦等方面均存在明顯差別。其中,西段缺少火山巖,大面積出露S型花崗巖、成礦以鎢、錫礦為主;東段火山巖發(fā)育,以I型及A型花崗巖為主,成礦與鐵、銅、鉛、鋅、金礦較密切。依據(jù)相關(guān)測年資料得到,阿拉套山地區(qū)的巖漿活動主要經(jīng)歷了火山噴發(fā)——酸性巖類侵入——各種脈巖形成的完整巖漿旋回。區(qū)內(nèi)侵入體的形成年齡集中于283-302Ma,主要為晚石炭世至早二疊世的產(chǎn)物。對區(qū)內(nèi)的阿爾夏提矽卡巖型礦床進(jìn)行了仔細(xì)研究,確定了其致礦侵入體是區(qū)內(nèi)的閃長巖小巖體及巖墻,而非前人研究認(rèn)為的推木爾特巖基,巖墻經(jīng)歷了廣泛的流體作用,是含礦流體的通道。推木爾特巖基在成礦過程中起著含礦流體屏蔽層的作用,阻擋了后期上升的流體的逃逸,促使含礦流體在其下方析出有用金屬,并富集成礦。其侵位主要引發(fā)了圍巖的熱接觸變質(zhì)作用,形成大理巖化及角巖化。通過典型礦床的研究,提出致礦侵入體的識別應(yīng)當(dāng)滿足五種聯(lián)系,即空間聯(lián)系、時間聯(lián)系、熱力學(xué)聯(lián)系、運動學(xué)聯(lián)系和動力學(xué)聯(lián)系,只有當(dāng)五種聯(lián)系都滿足時,地質(zhì)現(xiàn)象間才存在直接成因聯(lián)系,在實際研究中,任何一種聯(lián)系的破裂都表明兩種現(xiàn)象之間缺乏直接成因聯(lián)系,但仍可追索它們間的相互聯(lián)系�；诖�,致礦侵入體的識別還可從地質(zhì)特征,巖石學(xué)特征,礦物學(xué)特征及地球化學(xué)特征等方面進(jìn)行,可認(rèn)為是五種聯(lián)系的具體反映。
[Abstract]:Alatao Mountain is located near the border between Xinjiang and Kazakhstan in the north and west of China. The geological background and metallogenic geological conditions inside and outside Xinjiang are similar and a large number of metallic and non-metallic mineral resources have been formed. However, because it is located at the border, the research degree is very limited, so this paper integrates the previous data and combs the characteristics of intrusive rock activity in the Alatao Shandong section in combination with the field geological investigation, in order to get a more comprehensive understanding. Through regional geological correlation, the importance of Milchick fault is highlighted. That is to say, Milchick fault as the boundary, divided into the east and west of the second paragraph. There are obvious differences between them in stratigraphy, structure, magmatic rock and mineralization. There is a lack of volcanic rocks in the western part, large areas of S type granite, mainly tungsten and tin mineralization, and volcanic rocks developed in the eastern part, I type and A type granite, mineralization with iron, copper, lead, zinc and gold are close. According to the relevant dating data, magmatic activities in the Alataoshan area mainly experienced a complete magmatic cycle formed by volcanic eruption-acidite intrusions and various dikes. The formation age of the intrusions in this area is mainly from the late Carboniferous to the early Permian. The arschatite skarn type deposit in this area has been carefully studied, and it has been determined that the ore-causing intrusive body is the diorite small rock mass and the rock wall in the area, rather than the napolt rock base as considered by previous studies, the rock wall has experienced extensive fluid action. Is the passage of ore-bearing fluids. In the process of ore-forming, the Pumult base acts as a shielding layer of ore-bearing fluid, which prevents the runaway of the rising fluid in the later stage, and promotes the ore-bearing fluid to precipitate useful metals under the ore-forming process and to enrich the ore-forming. Its emplacement mainly caused the thermal contact metamorphism of surrounding rock and formed marble and hornstone. Through the study of typical ore deposits, it is proposed that the identification of ore-causing intrusions should satisfy five kinds of connections, namely, spatial, temporal, thermodynamic, kinematic and dynamic, and only when the five connections are satisfied. There is a direct genetic relationship between geological phenomena. In the actual study, the rupture of any kind of connection indicates that there is no direct genetic relation between the two phenomena, but the mutual relation between them can still be traced. Based on this, the identification of ore-causing intrusions can also be carried out from geological, petrological, mineralogical and geochemical characteristics, which can be considered as a concrete reflection of the five kinds of connections.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P588.12;P612

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