水口山矿田鸭公塘3#岩体地质地球化学特征及成岩机制分析  

Geological and Geochemical Characteristics and Diagenetic Mechanism Analysis of Yagongtang 3#Rock Mass in Shuikoushan Ore Field

作　　者：左昌虎 蔡亚飞 沈延治 ZUO Changhu;CAI Yafei;SHEN Yanzhi

机构地区：[1]湖南水口山有色金属有限责任公司,湖南衡阳421513

出　　处：《中国矿山工程》2025年第1期69-76,共8页China Mine Engineering

摘　　要：本文以鸭公塘岩体为研究对象,对岩体的岩石学和地球化学特征进行研究,探讨了其成岩机制。研究表明,鸭公塘岩体岩性相对简单,其主要为花岗闪长岩,属准铝质富钠高钾钙碱性岩系。岩体在挤压向伸展过渡的环境下,沿着构造裂隙上升,在侵入近地表的构造空间而形成,成岩物质为壳幔混合型,属于典型的I型花岗岩。稀土元素曲线配分图为左高右低的右倾型,显示轻稀土较重稀土相对富集且分异程度高,轻、重稀土的分馏相对明显,为强烈重稀土亏损而富集轻稀土而型。The Yagongtang pluton is closely related to the formation of deep lead-zinc copper iron polymetallic deposits.This article takes the Yagongtang rock mass as the research object,studies the petrological and geochemical characteristics of the rock mass,and explores its diagenetic mechanism.Research has shown that the lithology of the Yagongtang rock mass is relatively simple,mainly composed of granodiorite,belonging to the quasi aluminum rich sodium high potassium calcium alkaline rock series.The rock mass rises along structural fractures in an environment transitioning from compression to extension,and forms by invading the near surface structural space.The diagenetic material is a crust mantle mixed type,belonging to the typical Type I granite.The distribution curve of rare earth elements shows a right skewed pattern with high left and low right,indicating that light rare earths are relatively enriched and differentiated from heavy rare earths.The fractionation of light and heavy rare earths is relatively obvious,indicating a strong loss of heavy rare earths and enrichment of light rare earths.

关 键 词：地球化学特征 成岩机制 

分 类 号：TD168[矿业工程—矿山地质测量]