Rhenium-Osmium Systematics of the Bushveld Complex

9406259鲁伊斯我们建议使用Os同位素作为系统中地壳相互作用的监测器来评估氘和热液流体在铂族元素成矿中的作用。 将对围岩和地壳捕虏体进行负电离质谱法（NTIMS）的批量分析，这些岩石和捕虏体可能代表布什维尔德的地壳成分。 铼-锇分析铂族元素富集层和邻近的硅酸盐也将获得;电感耦合等离子体质谱法（ICP-MS）的初步结果显示，在这些视野的不均匀性，特别是在氘和热液效应是显而易见的。 但是需要通过激光烧蚀ICP-MS对PGE相进行原位Os同位素和PGE分析，以记录这些过程的各种输入。 在这项研究中获得的数据将使我们能够把一些限制的岩浆，后成矿和热液的贡献，铂族元素矿化在布什维尔德复杂。

9406259 Ruiz We propose to assess the effects of deuteric and hydrothermal fluids in PGE mineralization by using Os isotopes as a monitor of crustal interactions in the system. Bulk analyses by negative ionization mass spectrometry (NTIMS) will be performed on country rocks and crustal xenoliths, as possible representatives of the crustal component in the Bushveld. Re-Os analysis of PGE-enriched layers and adjacent silicates will also be obtained; preliminary results by inductively coupled plasma mass spectrometry (ICP-MS) show heterogeneities in these horizons, particularly where deuteric and hydrothermal effects are evident. But in situ Os isotope and PGE analysis of PGE phases by laser ablation ICP-MS are required to document the various inputs of these processes. The data obtained in this study will allow us to place some constraints on the magmatic, deuteric and hydrothermal contributions to PGE mineralization in the Bushveld Complex.