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上黑龙江盆地位于大兴安岭北部,是一个由陆源碎屑物填充和沉积而成的中生代构造型断陷盆地,其形成和演化受蒙古—鄂霍茨克造山带制约。盆地内赋存有石油、天然气、煤、金、银、铜及其他一些非金属矿产。通过分析盆地的形成和发展演化过程,结合目前盆地内已发现的金矿床(点)成矿特征,认为在地层和构造等地质特征方面,盆地在以长缨—依林—龙河一带为界的东西两侧存在差异性,因此在矿床成因和成矿特征方面有所不同。通过总结东西区金矿床(点)的成矿特征,指出在西部区应主要寻找以老基底为成矿围岩的铜、金矿床和以二十二站组地层为围岩的蚀变岩型和石英脉型金矿床;在东部区应主要寻找以火山岩地层为围岩的蚀变岩型岩金矿床,同时兼顾西部区所有的岩金矿床类型。研究认为,东部区具有较大的找矿潜力,是寻找大型—超大型岩金矿床的有利地区。
The Upper Heilongjiang Basin, located in the northern part of the Greater Xing’an Mountains, is a Mesozoic tectonic faulted basin filled and deposited by terrigenous clastic materials. Its formation and evolution are controlled by the Mongolian-Okhotsk orogenic belt. The basin contains oil, natural gas, coal, gold, silver, copper and other non-metallic minerals. By analyzing the formation and evolution of the basin and combining with the mineralization characteristics of the gold deposits (spots) found in the basin, it is considered that in the geological features such as strata and structure, the basin is bounded by the Changying-Yilin-Longhe area There are differences between east and west sides, and therefore different in genesis and mineralization characteristics of the deposit. By summarizing the metallogenic characteristics of the gold deposits in eastern and western regions, it is pointed out that in the western region, the copper and gold deposits with the old basement as the metallogenic rock and the alteration rock type with the basement of the Twenty-two Stations should be mainly looked for And quartz pulse type gold deposits. In the eastern area, the alteration type rock gold deposits should be mainly located in volcanic strata as the surrounding rock, taking into account all types of rock-gold deposits in the western area. The study suggests that the eastern region has a great prospecting potential and is a favorable area for finding large-super large-size gold-gold deposits.