桂西地区位于特提斯洋构造域与太平洋构造域的转换部位，是全球地幔对流环的两个会聚中心之一, 区内基性岩浆活动频繁，是成矿条件很有利的地区。然而，该区基性岩浆成因机制及地幔动力学过程对成矿的制约关系如何还不明确。桂西地区晚古生代基性岩（玄武岩和辉绿岩）及其密切相关的辉绿岩型金矿为我们研究上述问题提供了最佳研究对象。申请者拟选择含矿及贫矿基性岩，应用矿物学、岩石学、铂族元素（PGE）及 Sr-Nd-Pb-Os同位素地球化学，探讨基性岩成因及地幔源区特征，最终揭示基性岩浆作用与成矿作用之间的关系。本项研究将更好地理解桂西地区晚古生代深部地球动力学过程与成矿动力学背景，也将为晚古生代华南大地构造演化提供重要的科学依据。

The region of western Guangxi just located the transform bounder between the Tethyan and Pacific tectonic domain, which is the center of two global mantle convection circles, so it evolved very active basic magmatism and favor for ore deposits. However, it is still unclear about the relationship between the magmatism /mantle process and metallogenic mechanism. The mafic rocks (basalts and diabases) and associated gold deposits from the western Guangxi provides unique opportunities to conduct this kind of study. This project will focus on ore-bearing and barren mafic rocks, to apply the mineralogy, petrology and analyze the Platinum-group element ,Sr-Nd-Pb-Os isotopic ratios of bulk rock, then discuss the petrogenesis of mafic rocks and mantle characteristics, finally we will uncover the mimic relationship between the magmatism and metallogenic process. Therefore, this project will lead a better understanding the geodynamic metallogenic background and promote geodynamic research of southern China during the Late Paleozoic.