منابع مشابه
Mineral inclusions in diamonds may be synchronous but not syngenetic
It is widely assumed that mineral inclusions and their host diamonds are 'syngenetic' in origin, which means that they formed simultaneously and from the same chemical processes. Mineral inclusions that, instead, were formed earlier with respect to diamonds are termed protogenetic. However, minerals can have the same age as the diamonds in that they become enclosed in and isolated from any furt...
متن کاملDiamond-forming Fluids and Kimberlites: The Trace Element Perspective
Major element studies of fluid inclusions in fibrous and cloudy diamonds reveal that most inclusions trapped high density fluids (HDFs) with a wide range of composition. The compositions fall along two arrays between three end-members: carbonatitic to hydroussilicic and carbonatitic to hydrous-saline. Recent studies of diamonds from Siberia and Kankan (Navon et al., 2008; Weiss et al., 2008) fu...
متن کاملSEM and EPMA Analyses of Metallic Inclusions in Diamonds – Probing the Earth’s Deep Mantle
The Earth’s core is made up of a solid inner portion, encircled by a liquid metallic region [Fig. 1]. Surrounding this is a thick mantle made up of silicates and minor amounts of metal (perhaps reaching 1 wt%), and the outermost layer is the crust, made up of silicates (Figure 1). The mantle is not homogeneous – there are distinct regions of differing mineralogy and composition [2]. Understandi...
متن کاملSynthetic Fluid Inclusions XIV: Coexisting Silicate Melt and Aqueous Fluid Inclusions in the Haplogranite–H2O–NaCl–KCl System
Coeval silicate melt and aqueous synthetic fluid inclusions were INTRODUCTION formed at 800°C and 2000 bars in the quartz-saturated haploIn recent years the study of silicate melt inclusions has granite–H2O–NaCl–KCl system. The equilibrium assemblage congained considerable popularity as a method to charsisted of Ab19·2Or31·1Qtz49·1 melt, quartz, and an aqueous solution acterize the PTX evolutio...
متن کاملNano and sub-micro inclusions as probes into the origin and history of natural diamonds
a r t i c l e i n f o Keywords: Diamond Raman spectroscopy EDAX Inclusion Platinum group element Kimberlite Five natural faceted diamond samples, considered to have inherent submicroscopic and nanometric inclusions, were studied using various techniques such as Raman spectroscopy, Raman microscopy, scanning electron microscopy (SEM), and energy dispersive analysis of X-rays (EDAX). The principa...
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ژورنال
عنوان ژورنال: Reviews in mineralogy and geochemistry
سال: 2022
ISSN: ['1529-6466', '1943-2666']
DOI: https://doi.org/10.2138/rmg.2022.88.09