On the Formation of Brucite and Cronstedtite on Ceres
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منابع مشابه
Spectral Evidence for a Brucite-carbonate Alteration Assemblage on Ceres
Introduction: The dwarf planet Ceres is the largest object in the asteroid belt and is a primary target of NASA’s Dawn mission [1]. Recent modeling has shown that Ceres is likely differentiated and consists of a thin silicate+ice crust underlain by a thicker water ice mantle [2,3]. The presence of hydrated phases on Ceres, as inferred from the 3 μm absorption feature present in surface reflecta...
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Liquid Water Inside Ceres: The icy dwarf planet Ceres (radius ≈475 km, density 2.1 g.cm−3, semi-major axis 2.8 AU) is the only body besides the Earth and Mars where carbonates have been observed along with brucite, another product of aqueous alteration [1]. Ceres will be visited by the Dawn spacecraft in 2015, which will offer an opportunity to constrain the origin of this large icy body. For e...
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Large, low-density C-type asteroids are abundant in the main belt. The most prominent of these objects is the dwarf planet Ceres, which presents an advanced stage of evolution. Ceres is almost twice as large as Enceladus, and both objects contain more than 50% of water in volume [1]. Although asteroids cannot benefit from tidal heating like outer planet satellites, their proximity to the Sun pr...
متن کاملModeling Aqueous Alteration of Cm Carbonaceous Chondrites: Implications for Cronstedtite Formation by Water-rock Reaction
Introduction: CM carbonaceous chondrites display a wide range of aqueous alteration products that occurred by low temperature water-rock reactions on their parent bodies [1,2]. Previous modeling studies have verified that these reactions occurred at low temperatures (0-50C), for they reproduced many of the observed mineral assemblages [3]. The dominant phases are tochilinite and Mg-Fe phyllosil...
متن کاملکانی شناسی مرمرهای بروسیت دار، حاشیه شرقی باتولیت شیرکوه (غرب استان یزد)
Igneous bodies in Manshad-Taft fau lt zone arc intruded into Shirkuh granitic batllolilic basement. They also cause different skam-marble mineralization in dolomitized limestones which are covered granitic basement. Skarns are composed of variety of minerals. Marbles consist of variolls minera ls such as brucite, forste rite, diopsid, pcriclase,taJc, calcite, dolomite, and hydromagnesite...
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