同源深部火山岩浆作用与斑岩成矿关系的研究，是目前斑岩型Cu矿床研究的主题和前沿领域之一。相比斑岩，玄武质-安山质-英安质火山岩来源更深、演化程度较低且序列更完整，能提供源区和不同深度的成岩成矿信息。以往的研究侧重于岛弧和大陆弧环境，而与陆内环境斑岩型Cu矿床同源的火山岩研究十分薄弱。本项目选择陆内玉龙铜矿带产出的、分别与Cu成矿和不成矿斑岩同源的两组（拉乌和囊谦）火山岩，在岩相学和矿物学的基础上，通过对两组玄武质-安山质-英安质火山岩中磷灰石、榍石和锆石原位化学组成的研究，限定各岩相分异演化程度及氧逸度、挥发分、温压（深度）等变化规律，进而对比两组火山岩成岩成矿条件的共性和差异性，阐明其源区和深部岩浆作用的差异性成矿机制，最终建立副矿物化学指标体系，用于指示陆内斑岩型Cu矿床深部成矿作用。这些问题的解决或认识的深化，无论对丰富斑岩型矿床的成矿理论，还是对远景区成矿潜力评价都具有重要意义。

The scientific issue about the relationship between comagmatic deep volcanism and porphyry ore-forming system is the topic and frontier in the porphyry deposit research. Compared with porphyries, basaltic-andesitic-dacitic volcanic rocks in composition are commonly closer to original magmas and less evolved, and have more complete sequence. Thus, they can provide information about rock- and ore-forming conditions of magma source and chambers in different depth. Previous studies have focused on island and continental arcs, whereas volcanic rocks associated with porphyry Cu deposits in intracontinental setting are poorly studied. In the project, associated with Cu-mineralized and barren porphyries, respectively, two volcanic groups (Lawu and Nangqian), which are distributed within Yulong copper belt of intracontinental setting, will be chosen as the important objects of the study. Based on the petrography and mineralogy, the chemical compositions of apatites, titanites and zircons from the two basaltic-andesitic-dacitic volcanic groups will be in-situ analyzed to determine the magmatic differentiation, the volatile, magmatic oxidation state, temperature, pressure and eruption level of each volcanic phase. Then, the similarity and difference of petrogenic and metallogenic conditions between the two volcanic groups are compared to illuminate the mechanism of differential mineralization of the magma source and deep chambers between intracontinental Cu-mineralized and barren porphyry system. Finally, the aim of the study is to establish chemical indexes of accessory minerals of volcanic rocks to indicate the intracontinental porphyry Cu deep mineralization. The solution or further understanding of the above scientific issues will be of great significance not only to enrich metallogenic theory of porphyry deposits, but also to evaluate ore potential of prospects.