【摘要】：青藏高原鹽湖區(qū)是我國四大現(xiàn)代鹽湖區(qū)之一,鹽湖礦產(chǎn)資源十分豐富。鄂雅錯鹽湖位于藏北(羌塘)高原西北部,是近年來新發(fā)現(xiàn)的具有尋找富鉀、鋰、硼鹵水礦潛力較大的鹽湖。由于自然環(huán)境等多方面的因素,其研究程度較低,特別是對于鄂雅錯湖鹵水成分的組合演變,以及有用、有害元素的含量與分布等問題研究不足,在一定程度上制約了該鹽湖找礦潛力評價及開發(fā)利用。本文以涉及鹽湖方面的前沿學(xué)科研究領(lǐng)域及國家戰(zhàn)略需求對鄂雅錯鹽湖采用水文地球化學(xué)方法進行系統(tǒng)的地球化學(xué)研究分析工作,研究成果對鄂雅錯鹽湖區(qū)富鉀、鋰、硼鹵水找礦及開發(fā)利用提供了一定的理論依據(jù),具有重要的參考價值。主要通過對鹽湖鹵水礦礦區(qū)地質(zhì)特征、成礦機理研究掌握鄂雅錯鹽湖區(qū)域成礦背景及其水文地質(zhì)特征;通過對鹵水化學(xué)組分分析研究,總結(jié)出其橫向、縱向組分含量變化規(guī)律;通過對鹵水等溫蒸發(fā)實驗分析,了解其鹵水蒸發(fā)過程中的相化學(xué)行為及可能的析鹽規(guī)律。綜上得出結(jié)論鄂雅錯鹽湖鹵水礦主要為湖表鹵水,其鹽湖成礦嚴格受地形、地貌、水文氣候及古地理環(huán)境等控制。依據(jù)鹽湖鹵水的分類,鄂雅錯湖屬于硫酸鹽型硫酸鈉(鎂)亞類鹽湖,它的形成需要具備三個條件:閉流或者半閉流的成鹽盆地;多種化學(xué)元素,特別是成鹽元素不斷地補給及富集;長期持續(xù)的濕潤—干旱交替古氣候及干旱的現(xiàn)代氣候環(huán)境。
[Abstract]:The salt lake area of Qinghai-Xizang Plateau is one of the four modern salt lakes in China, which is rich in mineral resources. Eyabo salt lake is located in the northwest of the northern Tibet (Qiangtang) plateau. It is a new salt lake with the potential of searching for rich potassium, lithium and boron brines in recent years. Due to many factors, such as natural environment, its research degree is low, especially for the combination and evolution of brine composition, useful and harmful element content and distribution in Eyazuo Lake. To some extent, it restricts the evaluation of prospecting potential and exploitation of the salt lake. In this paper, the hydrogeochemistry method is used to study and analyze the salt lake of Eyakao by using hydrogeochemical method, which is based on the frontier research field and the national strategic demand of the salt lake. The results show that the salt lake is rich in potassium and lithium. Boron brine prospecting and exploitation provide some theoretical basis and have important reference value. Through the study of geological characteristics and metallogenic mechanism of salt lake brine ore area, the metallogenic background and hydrogeological characteristics of Eyabo salt lake area are grasped, the variation law of horizontal and longitudinal component content is summarized by analyzing and studying the chemical composition of brine. By analyzing the isothermal evaporation of brine, the phase chemical behavior and the possible salt evolution of the brine were studied. It is concluded that the salt lake brine deposit is mainly lacustrine surface brine, and its salt lake mineralization is strictly controlled by topography, geomorphology, hydrological climate and paleogeographic environment. According to the classification of salt lake brine, Eyabo Lake belongs to sulfate type sodium sulfate (magnesium) subclass salt lake, and its formation needs three conditions: closed or semi-closed salt-forming basin; Many chemical elements, especially salt-forming elements, are continuously replenished and enriched.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P619.211

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