墨西哥La Yesca银多金属矿矿石特征及有用元素赋存状态

Ore Characteristics and Useful Element Occurrence State of Ag-polymetallic Deposit in La Yesca,Mexico

矿区位于墨西哥纳亚里特州La Yesca一带,勘查结果表明为一大型蚀变岩型低温热液银锰多金属矿床。对该区矿石成分、结构、构造、蚀变特征及有益元素赋存状态等进行了分析,研究表明:矿石中主要有用元素为锰、银、铅、锌、铜等;组成矿石的金属矿物成分主要有软锰矿、黑锌锰矿、黑锰矿、锰铅矿、褐铁矿等;矿石有益成分为Ag,其次为Mn、Pb、Zn,少量的Cu、Au,矿床平均品位Ag 243.18 g/t,Pb 0.51%,Zn 1.15%,Mn 9.83%,Cu 0.20%,Au 0.18 g/t;矿石自然类型主要为英安岩型块状矿石,以氧化矿石为主,少量混合矿石;矿石工业类型为块状金属硫化物矿石和细脉浸染状矿石,少量的银锰铅锌、锰铅锌、铅锌金属硫化物矿石。

The mining area is located in La Yesca,Nayarit,Mexico.The exploration results show that it is a large altered rock type low temperature hydrothermal silver-manganese polymetallic deposit.The composition,structure,structure,alteration features and the occurrence state of beneficial elements are analyzed.The results show that the main useful elements are manganese,silver,lead,zinc and copper and so on,the metallic minerals that make up the ore are mainly pyrolusite,chalcophanite,hausmannite,coronadite,limonite,etc..The beneficial composition of the ore is Ag,followed by Mn,Pb,Zn and a small amount of Cu,Au,the average ore grade of the deposit is Ag 243.18 g/t,Pb 0.51%,Zn 1.15%,Mn 9.83%,Cu 0.20%,Au 0.18 g/t.Industrial ores are mainly massive metallic sulfide and veins-impregnated ores,and contain a small amount of silver manganese lead zinc,manganese lead zinc and lead zinc metal sulfide.