搜索结果: 1-7 共查到“地球物理学 Nd”相关记录7条 . 查询时间(0.066 秒)
兴蒙造山带中段锡林浩特跃进地区出露一套石炭纪侵入岩，具有类似岛弧侵入岩的岩石组合(花岗闪长岩、英云闪长岩、石英闪长岩)和地球化学特征.锆石LA-MC-ICP-MS U-Pb测年结果表明，这套侵入岩形成时代为310~330 Ma，属于石炭纪中晚期.岩石地球化学分析表明，跃进侵入岩属于钠质钙碱性系列岩石；A/CNK范围为0.86~1.17，大多属于准铝－弱过铝质系列；样品均具有较高的Mg#值，范围为4...
Geochronology, Geochemistry and Sr-Nd-Pb-Hf Isotopes of No. I Complex from the Shitoukengde Ni–Cu Sulfide Deposit in the Eastern Kunlun Orogen, Western China: Implications for the Magmatic Source, Geodynamic Setting and Genesis
Sr-Nd-Pb-Hf isotopes crustal contamination oceanic slab break-off post-collisional extension Shitoukengde Ni-Cu deposit Eastern Kunlun Orogen
2018/4/10
The Shitoukengde Ni-Cu deposit, located in the Eastern Kunlun Orogen, comprises three mafic–ultramafic complexes, with the No. I complex hosting six Ni-Cu orebodies found recently. The deposit is host...
Surface layer Nd isotopic composition of ferromanganese crusts collected from the Takuyo-Daigo Seamount reflects ambient seawater
ferromanganese (Fe-Mn) crust Nd isotopic composition seawater Takuyo-Daigo Seamount
2017/4/10
The neodymium (Nd) isotopic composition of the surface layers of eleven ferromanganese crust samples collected
from the Takuyo-Daigo Seamount (northwest Pacific Ocean) was determined. This is the fir...
The 3550 year BP-1944 A.D.magma-plumbing system of Somma-Vesuvius: constraints on its behaviour and present state through a review of Sr-Nd isotope data
Somma-Vesuvius magma chamber crustal contamination
2015/9/15
Vesuvius, dominating the densely-populated Neapolitan area, is one of the most dangerous volcanoes in the World. Its destructive power derives from energetic subplinian and plinian eruptions, such as ...
地幔柱是地球动力学系统中重要的组成部分，不仅形成规模巨大的大火成岩省，也形成了众多和层状基性侵入体相伴生的具有经济价值的矿床类型。因其成矿类型独特（比如PGE、Cr、Ni、V、Ti），层状岩体一直受到非常广泛的关注和深入的研究；其典型的克拉通内部产出环境，也使得它们成为研究克拉通演化和壳-幔相互作用非常重要的岩石组合。大多数层状岩体是地幔岩浆多期次注入到地壳岩浆房中结晶形成，因此其母岩浆不可避免的...
上世纪70年代以来，Sm-Nd同位素体系一直被广泛应用于地球化学示踪和地质年代学研究中，为获取岩石的形成时间、演化及其地球动力学背景提供了重要参数。精确测定143Nd/144Nd和147Sm/144Nd比值是获取准确年龄和初始值的前提条件。同位素稀释热电离质谱法（ID-TIMS）具有极高的准确度和精度，被认为是Sm-Nd同位素测定的基准技术，备受地球化学家和分析家青睐。传统方案采用149Sm-15...