黑龙江省草帽山-基座山地区地球化学特征及成矿远景预测

黑龙江省草帽山-基座山地区位于大兴安岭中段华力西、燕山期铁、钨、银、金、钼、铜成矿带的北东端,呼玛县兴隆砂金矿区的南部。区内经历了漫长的沉积地层发育及多期次的强烈岩浆活动,分布有众多砂金矿床及岩金矿点,成矿条件较为优越。文章对区内1∶5万水系沉积物测量采集的样品分析数据进行了统计分析,将11种元素划分成Ag,Cu,Pb,Zn组合类型、W,Mo,Bi组合类型、As,Sb,Hg组合类型、Au组合类型,总结了区内地球化学特征及地质意义,并通过对各元素的平均值、变异系数、相关性及元素空间分布特征进行比较研究,认为Au元素含量高于全省丰度、变异系数为大(5.668),单元素异常强度高、浓度分带明显,为该区最主要的成矿元素,研究区是金成矿的有利地区。

Geochemical Characteristics and Metallogenic Prospect of Caomaoshan-Jizuoshan Area in Heilongjiang Province

Caomaoshan-Jizuoshan area in Heilongjing province is located in the northeast of Fe,W,Ag,Au,Mo and Cu ore-forming belts in Variscan,Yanshan periods in the middle section of Daxing'anling and the southern part of Xinglong gold placer area in Huma county.It has experienced long development of sedimentary strata and multiple periods of intense magmatism,placer gold deposits and rock gold deposits are distributed in the area.The ore-forming conditions are favorable.In this paper,the sample analysis data of stream sediments with the scale of 1∶50,000 collected in the area are analyzed statistically.11 elements can be divided into four types:they are Ag,Cu,Pb,Zn type,W,Mo,Bi type,As,Sb,Hg type and Au type.The geochemistry characteritics and geological significance have been summarized.The average value,coefficient of variation,correlation and spatial distribution of each element have been compared and studied.It is considered that the content of Au is higher than that of the whole province.The coefficient of variation is large(5.668),the abnormal strength is high and the concentration zoning is obvious.Au is the most important ore-forming element in this area,and it is the favorable area for gold deposit.