中文摘要：

Mafic 侵入和女同性恋很好在 Yinmin 和 Lanniping 区域被保存，在扬采·布洛克，的西方的边缘以内定位了 SW 中国。尽管这些 mafic 从在不同时期期间形成的二个区域摇，他们分享 PGE 集中的类似的范围。大多数 Yinmin gabbroic 女同性恋包含相对高的 PGE 集中(PGE ?=? 13.9-87.0 ? ppb ) 并且低 S 内容(0.003 ? 比从披风融化的 mafic 岩浆的最大的 PGE 集中高的 %-0.020?%), 。二件非凡的 Yinmin 样品被相对低的 PGE 描绘(PGE ?=? 0.31-0.37 ? ppb ) 并且高 S (0.114 ?%-0.257?%) 内容。相反，从 Lanniping gabbroic 侵入的大多数样品有低 PGE 集中( PGE ?=? 0.12-1.02 ? ppb )并且高 S 内容( 0.130 ?%-0.360?%),除了三件样品展出相对高的 PGE 之外( PGE ?=? 16.3-34.8 ? ppb )并且低 S 集中( 0.014 ?%-0.070?%)。所有 Yinmin 和 Lanniping 样品被 PPGE 的丰富在原始披风的规范的图相对 IPGE 描绘，并且 high-PGE 取样展览明显的 Ru 异例。这研究建议那在期间上升父母岩浆， Os-Ir-Ru 合金或铬铁矿 / 尖晶石的移动为 Lanniping low-PGE 样品为 Yinmin high-PGE 样品和相对更低的 Pd/Ir 比率和 Ru 异例导致高 Pd/Ir 比率和 Ru 异例。我们建议对 Yinmin gabbroic 女同性恋父母的岩浆是开始 S 不饱和的，并且随后，次要的发展岩浆到达硫浸透并且导致硫化物分离。尽管 Lanniping 父母岩浆原来没在 S 被浸透，高 Cu/Pd 比率(3.8 ???? Р

英文摘要：

Mafic intrusions and dykes are well preserved in the Yinmin and Lanniping districts, located within the western margin of the Yangtze Block, SW China. Although these mafic rocks from the two areas formed during different periods, they share similar ranges of PGE concentration. Most of the Yinmin gabbroic dykes contain relatively high PGE concentrations （PGEs=13.9-87.0 ppb） and low S contents （0.003 %-0.020 %）, higher than the maximum PGE concentrations of mafic magmas melting from the mantle. Two exceptional Yinmin samples are characterized by relatively low PGE （PGEs = 0.31-0.37 ppb）and high S （0.114 %-0.257 %） contents. In contrast, most samples from the Lanniping gabbroic intrusion have low PGE con- centrations （PGEs = 0.12-1.02 ppb） and high S contents （0.130 %-0.360 %）, except that the three samples exhibit relatively high PGE （PGEs=16.3-34.8 ppb） and low S concentrations （0.014 %-0.070 %）. All the Yinmin and Lanniping samples are characterized by the enrichment of PPGE relative to IPGE in the primitive-mantle normalized diagrams, and the high-PGE samples exhibit obvious Ru anomalies. This study suggests that during the ascent of the parental magma, removal of Os-Ir-Ru alloys and/or chro- mite/spinel leads to high Pd/Ir ratios and Ru anomalies for the Yinmin high-PGE samples and relatively lower Pd/lr ratios and Ru anomalies for the Lanniping low-PGE samples. We propose that the magmas parental to the Yinmin gabbroic dykes are initially S-unsaturated, and subsequently, minor evolved magma reached sulfur saturation and led to sulfide segregation. Although the Lanniping parental magmas are originally not saturated in S, the high Cu/Pd ratios （3.8× 10^4 to 3.2 × 10^6） for most of the Lanniping samples indicate the S-saturated state and sulfide segregation. A calculation shows that the PGE-poor magmas might have experienced 0.01%-0.1%sulfidesegregationinthemagma chamber. Therefore, our study provides a possible opportunity to discover PGE-enriched sulfide mineralization some