湖南省大义山狮形岭锡矿床地质特征及成因分析

Geological Characteristics and Genesis of the Shixingling Tin Deposit in Dayi Shan, Hunan Province

湖南省大义山狮形岭锡矿床位于大义山矿床中带,产于大义山复式花岗岩体内。在充分收集研究前人的工作基础上经自身实践,本文研究了矿床基本地质特征,并从控矿条件、包裹体测温、同位素特征几个方面对狮形岭锡矿床的成因进行了分析。分析显示,该区北西向的基底断裂为成矿物质的运移提供了通道,次一级的断裂构造控制了矿体的分布,氢氧同位素特征指示成矿流体主要为岩浆水,流体包裹体测温成矿温度为114-418℃,表明该矿床为中高温岩浆气水热液充填矿床。

Hunan dayishan Shixingling tin mine is located in the middle zone of Dayishan deposit, produced in the complex granite of Dayishan. Based on the previous work, this paper studies the basic geological features of the ore deposit through its own practice, and analyzes the genesis of the Shixingling tin deposit from the aspects of ore control conditions, inclusion temperature measurement and isotopic characteristics. The north west of basement faults provides a channel for ore-forming material migration, second level fault controlled the orebody distribution of hydrogen and oxygen isotope characteristics indicate ore-forming fluid is mainly magmatic water, and fluid temperature ore- forming temperature is 114-418 °C , which indicates that the deposit is of medium high temperature magmatic hydrothermal fluid filling deposit.