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Article
Geochemistry of phlogopite, diopside, calcite, anhydrite and apatite pegmatites and syenites of southern Madagascar: evidence for crustal silicocarbonatitic (CSC) melt formation in a Panafrican collisional tectonic setting
The phlogopite, diopside, calcite, anhydrite and apatite pegmatites of Ampandrandava and Beraketa are examples for the many other pegmatites of similar silicocarbonatitic composition found in the Bekily and Be...
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Article
The pink topaz-bearing calcite, quartz, white mica veins from Ghundao Hill (North West Frontier Province, Pakistan): K/Ar age, stable isotope and REE data
In the area of the Ghundao Hill (Northern Frontier Province, Pakistan) an orange-yellow to cherry-red topaz is found in calcite, quartz, white mica veins crosscutting the schistosity of probably Silurian to De...
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Article
Geochemical and isotopic (Sr, C, O) data from the alkaline complex of Grønnedal-ĺka (South Greenland): evidence for unmixing and crustal contamination
The alkaline intrusion of Grønnedal-ĺka (South Greenland) is the oldest of the ten major rift-related plutonic complexes of southern Greenland that intruded during the Gardar period between 1330 and 1150 Ma in...
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Article
Mineralogy and geochemistry of Al-phosphate and Al-borosilicate-bearing metaquartzites of the northern Serra do Espinhaço (State of Bahia, Brazil)
The investigated Al-phosphate- and Al-borosilicate-bearing metaquartzite horizon belongs to the Middle Proterozoic Serra de Vereda member of the São Marcos Formation of the northern Espinhaço fold belt. Outcro...
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Article
Classification and mineralization potential of the pegmatites of the Eastern Brazilian Pegmatite Province
The potential for Nb, Ta, Li, Sn-mineralization as well as for precious stones for the Eastern Brazilian Pegmatite Province (EBPP) has been evaluated on the basis of 530 K-feldspar and 550 muscovite major and...
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Article
Fluid inclusion microthermometry and the P-T evolution of gold-bearing hydrothermal fluids in the Niuxinshan gold deposit, eastern Hebei province, NE China
Niuxinshan is a typical example of the numerous mesothermal gold deposits formed during Mesozoic tectono-magmatic reactivation of the Archean North China Craton in eastern Hebei province. Gold occurs in quart...
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Article
Experimental, geochemical, mineralogical and O-isotope constraints on the late-magmatic history of the Fichtelgebirge granites (Germany)
Mineralogical, experimental, geochemical and stable-isotope data give evidence for an aqueous late-stage fluid which develops increasingly from the less to the more highly evolved granites of the Fichtelgebir...
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Article
Constraints on the origin of zonation of the granite complexes in the Fichtelgebirge (Germany and Czech Republic): evidence from a gravity and geochemical study
Compositional zoning of granitic plutons is a common feature, but the spatial variation of zoning is rarely studied in detail. It is suggested that important additional information can emerge if the compositi...
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Article
Enclaves in the S-type granites of the Kösseine massif (Fichtelgebirge, Germany): implications for the origin of granites
The Hercynian peraluminous granites of the Kösseine massif differ in composition and content of enclaves from the other granites of the Fichtelgebirge. They are garnet-, cordierite- and andalusite-bearing S-t...
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Article
Experimental determination of the upper stability of scorzalite, FeAl2[OH/PO4]2, and the occurrence of minerals with a composition intermediate between scorzalite and lazulite(ss) up to the conditions of the amphibolite facies
The stability field of scorzalite (FeAl2[OH/PO4]2) was investigated in the P-T range from 487 to 684 °C and 0.1 to 0.3 GPa. in hydrothermal experiments. The oxygen fugacity was fixed by the Ni/NiO buffer. Scorzal...
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Article
Geochemical and petrographic studies of Ta mineralization in the Nuweibi albite granite complex, Eastern Desert, Egypt
The Nuweibi albite granite is one of 14 known Sn-Ta-Nb bearing granitoids in the Eastern Desert region of Egypt. The granite is a highly leucocratic, albite-rich rock with accessory columbite-tantalite, cassi...
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Chapter
Mineral Economics, Mineralogy, Geochemistry and Structure of Gold Deposits: An Overview
The desire for gold has dramatically influenced the history of man. Its price is clearly related to its reputation as a safe store of wealth, the fear of inflation and war increasing it markedly. Because gold ...
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Chapter
Coin Moulds and other Ceramic Material: A Key to Celtic Precious Metal Working
Coin moulds from the Celtic oppidum of Manching together with fragments of precious metal melting hearths used there and some reference materials were studied by various scientific methods to determine the met...
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Article
Biogenic and lithogenic magnetic minerals in Atlantic and Pacific deep sea sediments and their paleomagnetic significance
Die Träger der Magnetisierung von Tiefseesedimenten wurden mineralogisch, elektronenmikroskopisch und gesteinsmagnetisch untersucht. Magnetische Eindomänen (SD) und Pseudo-Eindomänen (PSD) Partikel, die für ei...
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Chapter and Conference Paper
Prospection for Niobium-Rich Alkaline Rocks
Nb belongs to the fifth group of the periodic table of the elements. Its atomic number is 41, its atomic weight is 92.9046 and its electronegativity is 1.6. In a six-fold coordination its ionic radius is 0.64,...
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Chapter and Conference Paper
The Industrial Applications of Rare Earth Elements
Rare earth elements are used in several high technology industrial products. Their presence in alloys, ceramic and glass compounds and in oxide compounds provide special material properties. In metallurgy, all...
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Chapter and Conference Paper
Geochemical Evaluation of the Tantalum Potential of Pegmatites
Besides alkali granites, granitic pegmatites with local Ta2O5 concentrations of up to 0.1 wt.% are the most important economic sources for tantalum. Pegmatites very often occur in large swarms scattered over a wi...
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Chapter and Conference Paper
The Bastnaesite-Fluorite-Barite Deposit of the Kizilcaören District, Eskisehir, Turkey
There are about 100 minerals known to contain lanthanides in more than trace amounts. But there are only two of commercial importance, monazite, a mixed Th-REE-phosphate and bastnaesite, an REE-fluorocarbonate (M
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Article
Time calibration of a PT-path from the Western Tauern Window, Eastern Alps: the problem of closure temperatures
New Hornblende K-Ar and 39Ar-40Ar and mica Rb-Sr and K-Ar ages are used to place specific timemarks on a well-constrained pressure-temperature path for the late Alpine metamorphism in the Western Tauern Window. A...
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Article
Im Gedenken an Bruno Sander
