1 Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA, 2 Department of Earth Sciences, ETH-Zurich, Institute for Geochemistry and Petrology, Zurich, Switzerland, 3 Formerly affiliated with the Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, CA, USA, 4 Department of Earth Sciences, University of...

CHONDRITE. M. K. Weisberg, M. Kimura, A. Suzuki, E. Ohtani and N. Sugiura Department of Physical Sciences, Kingsborough College And Graduate Center of the City University of New York, Brooklyn, NY 11235, 2Department of Earth and Planetary Sciences, American Museum of Natural History, New York, NY10024, USA, [email protected]. Faculty of Science, Ibaraki University, Mito 310-8512, Japan, I...

a Department of Civil Engineering and Geological Sciences, University 6 of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN 46556, United States b Department of Earth Sciences, University of Durham, Durham DH1 3LE, UK c Chemistry Division, Nuclear and Radiochemistry, Los Alamos National Laboratory, MSJ514, Los Alamos, NM 87545, United States d IVA — Earth Sciences — Petrology Department, Vrije ...

Optical microscopy is a very unique tool to find out about the structural order of carbonaceous materials and coal by-products. It has two main utilization ways as an instrument to distinguish and quantify different phases in a polished surface and as a record of the reflectance of a given material. Using one or both capabilities there are significant contributions to different aspects of coal ...

introduction the area of this study is located near hamadan within the sanandaj - sirjan tectonic zone. in the hamadan area, consisting mainly of mesozoic plutonic and metamorphic rocks, aplites and pegmatites locally contain garnets.(baharifar et al., 2004, amidi and majidi, 1977; torkian, 1995. garnet-bearing schists and hornfelses in the area are products of regional metamorphism shown by sl...

Experimental, petrographic and numerical methods are used to explore the igneous evolution of the early solar system. Chapters 1 and 2 detail the results of petrographic and experimental studies of a suite of primitive achondritic meteorites, the ureilites. The first chapter presents data that reveal correlations between mineral modal proportions and mineral chemistry that are used to guide exp...

In this paper we classify the range of feldspathic igneous rocks using five geochemical variables: the FeO/(FeOþMgO) ratio or Fe-index, the modified alkali^lime index, the aluminum-saturation index, the alkalinity index, and the feldspathoid silica-saturation index.The Fe-index distinguishes between melts that have undergone extensive iron enrichment during differentiation from those that have ...