نتایج جستجو برای: dike emplacement
تعداد نتایج: 2977 فیلتر نتایج به سال:
Albertino Damasceno, MD, PhD; Bongani M. Mayosi, DPhil, FCP(SA); Mahmoud Sani, MBBS; Okechukwu S. Ogah, MBBS; Charles Mondo, MBChB, PhD; Dike Ojji, MBBS; Anastase Dzudie, MD; Charles Kouam Kouam, MD; Ahmed Suliman, MD; Neshaad Schrueder, MBChB, FCP(SA); Gerald Yonga, MBChB; Serigne Abdou Ba, MD; Fikru Maru, MD; Bekele Alemayehu, MD; Christopher Edwards, BS; Beth A. Davison, PhD; Gad Cotter, MD;...
This paper summarizes various hazards identified between 1978 when Yucca Mountain, located in arid southern Nevada, was first proposed as a potential site and 2008 when the license application to construct a repository for spent nuclear fuel and high-level radioactive waste was submitted. Although advantages of an arid site are many, hazard identification and scenario development have generally...
MESSENGER observations from Mercury orbit reveal that a large contiguous expanse of smooth plains covers much of Mercury's high northern latitudes and occupies more than 6% of the planet's surface area. These plains are smooth, embay other landforms, are distinct in color, show several flow features, and partially or completely bury impact craters, the sizes of which indicate plains thicknesses...
In a subduction setting, the type of magmatic products which reach upper crust, and eventually surface, depends on several variables, among some most relevant are tectonic regime, orientation magma pathways relative to predominant stress tensor. To better understand this relationship, we studied in detail an area Andes southern Central Chile subduction-related magmatism has been active at least...
The known dimensions of hydrothermal fluid circulation associated with emplacement of the 2.055-Ga Bushveld Igneous Complex (BIC) are extended with new isotopic ages for Paleoproterozoic mineral deposits in wallrocks (Transvaal Supergroup) surrounding the BIC. A fluorite-rich Mississippi Valley–type (MVT) deposit in the Zeerust district, dated at 2.05 Ga (Sm-Nd isochron age), has Nd isotopic co...
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