稀土元素对鲁西铜石、铜井、龙宝山杂岩体的同源性制约

20世纪80年代,在山东省平邑县发现归来庄大型金矿床,实现了鲁西黄金找矿的重大突破。此后,鲁西相继发现卓家庄、磨坊沟和龙宝山金矿。近年,又在沂南金矿的深部发现新的矿体,鲁西良好的金矿成矿前景引起了地质学界的广泛关注。目前,鲁西发现的金矿床主要分布在铜石、铜井和龙宝山等燕山期杂岩体的附近。这些岩体在成因上有什么关系值得研究。通过对上述岩体稀土元素的地球化学分析,每种岩体不同期次侵入的岩浆岩的稀土元素分布形式和3种岩体综合稀土元素分布形式均呈向右陡倾的弧形线,且配分曲线形态基本相似,都没有明显的Ce、Eu异常,指示了岩体之间存在同源性,均来自深部同一岩浆房。该认识对于指导鲁西黄金找矿具有一定的意义。

Rare Earth Elements for the Homology Restriction of the Tongshi, Tongjing and Longbaoshan Complex Body in Luxi

In the 1980s geological team veteran found large gold deposits in Guilaizhuang in Pingyi County, Shandong Province, which achieved a major breakthrough in Luxi gold prospecting. Then, they found Zhuojiazhuang, Mofanggou , Longbaoshan gold deposits in Luxi. In recent years in Yinan deep exploration people found new gold orebody, Luxi good prospects for gold mineralization have caused widespread concern in geology. At present, most Luxi gold deposits were found in Tongshi, Tongjing, and Longbaoshan near the Mesozoic complex bodies. The rock genesis is worth studying. According to the analysis of above-mentioned rock geochemistry characteristics of the REE, each rock non-contemporaneous intrusive magmatite which distribution pattern of REE being similar arc line of rightwards steep, and its distribution pattern of synthesized REE have similar properties, both have not obvious Ce and Eu anomaly showing that they are from the same magma room of the deep earth. The understanding of Luxi gold pros- pecting for guiding has great significance.