ISSN 1009-6248CN 61-1149/P 双月刊

主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

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    陕西与成矿有关的地层类型划分及其控矿作用

    Classification of Stratigraphic Types Related to Mineralization and Ore-Controlling in Shaanxi Province

    • 摘要: 笔者以《中国矿产地质志·陕西卷》研编成果为基础,将与成矿有关的地层划分为含矿地层、容矿地层和矿源地层3类,不同类型地层对成矿具有不同的控制作用。研究认为,含矿地层主要控制海/陆相沉积型、生物化学沉积型和层控热液型等同生矿床及沉积受变质型矿床,矿体常产于含矿地层的一定层位,并受一定类型的地质建造控制;容矿地层主要控制或影响岩浆热液型、构造热液型、斑岩型及接触交代型等后生矿床的形成与分布。其中,汞锑矿对容矿地层的建造类型具有明显的选择性;矿源地层主要为油气矿藏和某些类型金、银、铀矿床提供成矿物质来源。此外,少数地层兼具含矿地层、容矿地层或矿源地层多重属性。该类地层蕴藏着丰富的煤、油气等能源矿产及金银等贵金属矿产,属陕西与成矿有关的重要地层单位。该研究丰富了地层划分、地层与成矿关系研究的内容,并为新时期相关地层分布区的找矿工作提供了新的思路和依据。

       

      Abstract: Based on the research and compilation results of the "Shaanxi Volume of China Mineral Geology", this article divides the strata related to mineralization into three types: ore bearing strata, host strata, and source strata. Different types of strata have different control effects on mineralization. Research suggests that the ore bearing strata mainly control marine/terrestrial sedimentary, biochemical sedimentary, and layer controlled hydrothermal deposits, as well as sedimentary metamorphic deposits. Ore bodies often occur in certain layers of the ore bearing strata and are controlled by certain types of geological formations; The host strata mainly control or affect the formation and distribution of epigenetic deposits such as magmatic hydrothermal type, tectonic hydrothermal type, porphyry type, and contact metasomatic type. Among them, mercury antimony ore has obvious selectivity for the construction type of ore bearing strata; The ore source strata mainly provide mineral sources for oil and gas fields and certain types of gold, silver, uranium and other deposits. In addition, a few strata have multiple attributes including ore bearing strata, host strata, or source strata. This type of formation contains abundant energy minerals such as coal, oil and gas, as well as precious metal minerals such as gold and silver, and is an important stratigraphic unit related to mineralization in Shaanxi. This paper enriches the research on stratigraphic division and the relationship between stratigraphy and mineralization, and provides new ideas and basis for the exploration of related stratigraphic distribution areas in the new era.

       

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