By Jörg Trappe
The publication offers a brand new and entire version for the improvement of phosphate sediments. beginning with geochemistry and together with new equipment in sedimentology (sequence stratigraphy), it ends up in an interdisciplinary method of a source approach overlaying all fields of phosphate geology. For researchers, academics and scholars alike the publication bargains a whole assessment of the full box together with case reviews of significant deposits.
Read or Download Phanerozoic Phosphorite Depositional Systems: A Dynamic Model for a Sedimentary Resource System (Lecture Notes in Earth Sciences) PDF
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Ich mochte an dieser Stelle der Minna-James-Heineman-Stiftung und der Deutschen Forschungsgemeinschaft, Sonderforschungsbereich seventy nine, die diese Arbeit durch finanzielle UnterstUtzung ermoglicht haben, herzlich danken. Auch dem LeichtweiB-Institut fUr Wasserbau, Herrn Professor Dr. FUhrboter und seinen Mitarbeitern gebUhrt mein Dank fUr stetige Hilfsbereitschaft und die Gastfreundschaft.
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Extra info for Phanerozoic Phosphorite Depositional Systems: A Dynamic Model for a Sedimentary Resource System (Lecture Notes in Earth Sciences)
The destructive processes can be purely physical but also biologic (Fig. 3). Most of these sedimentological phenomenons can be used for an environmental interpretation similar to siliciclastic rocks. But estimates of current intensity need to be adjusted to the different density of quartz and apatite. Similar interpretation problems are rising in polymineral sediment mixtures. lied to the interpretation of phosphorites depositional environment. SCHROTER (1986) and Fig. 3a. (next page) Sediment structures in phosphate rocks.
The use of the terms "phosphate rock" and "phosphorite" was accepted by most authors and seems to be a helpful tool to differentiate phosphate-bearing rocks from more economically valuable phosphaterich sediments. The most popular definition for the two terms has turned out to be the 18 % P205 boundary, respectively 50 % phosphate mineral component, with "phosphate rocks" defining compostions < 18% P205 and "phosphorite" these of > 18% P205. This definition will be followed in this work. The kind of phosphate mineral is not specified.
Microfacies techniques: 49 Fig. 7a. B C E F 50 Phosphate sediments Fig. 7b. Micro facies techniques: 51 Fig. 7c. g. guano) is known from insular phosphate occurrences (BRAITHWAITE 1980). To indicate this origin of phosphate mineralogy, the term phosphatized can optionally be used. In depositional environments which are characterized by low net sedimentation rates, microbial phosphate precipitation is very commonly present and produces nucleated or coated grams. This can be a long lasting process (GRIMM 1992).