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朝山金矿床与白芒山辉石闪长岩有直接的成因联系。岩石的主量元素分析结果表明:Si2O含量为50 8%～54 58%,Na2O+K2O为6 58%～7 38%,K2O/Na2O为0 62～1 12,全碱—硅投影显示朝山岩体岩性为辉石闪长岩;微量元素分析结果显示Au、Ag、Cu、Pb、Zn成矿元素含量较高;稀土元素球粒陨石标准化曲线显示轻稀土富集而重稀土亏损;δEu介于0 75%～0 85%之间,说明辉石闪长岩分异演化程度不高。结合矿床地质特征,推测朝山金矿成矿流体和成矿物质主要来源于岩浆,在热液充填交代和夕卡岩化复合作用下,促使热液流体中的金沉淀成矿。
The Jiashan gold deposit has a direct genetic relationship with the Baodangshan pyroxeneite. The main elemental analysis results of rock show that the Si2O content is 50 8% -54 58%, Na2O + K2O is 6 58% -73 38%, K2O / Na2O is 0 62-1 12, The body lithology is pyroxene diorite. The results of trace element analysis show that the contents of Au, Ag, Cu, Pb and Zn are higher. The normalization curve of rare earth element chondrite shows light rare earth enrichment and heavy rare earth loss. Between 0 75% ~ 0 85%, indicating that the differentiation degree of pyroxene diorite is not high. According to the geological characteristics of the deposit, it is speculated that the ore-forming fluids and ore-forming materials in the Jianshan gold deposit are mainly derived from magma, which promote the gold deposition in the hydrothermal fluid under the action of hydrothermal filling and skarnization.