Download or read book Geochemistry of Marine Authigenic Dolomites and Host Sediments written by Marissa Smirnoff and published by . This book was released on 2017 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemistry of Diagenetic Dolomites in Miocene Marine Formations of California and Oregon written by Kiguma Jack Murata and published by . This book was released on 1972 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Geochemistry written by Horst D. Schulz and published by Springer Science & Business Media. This book was released on 2006-03-09 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1980 a considerable amount of scientific research dealing with geochemical processes in marine sediments has been carried out. This textbook summarizes the state-of-the-art in this field of research providing a complete representation of the subject and including the most recent findings. The topics covered include the examination of sedimentological and physical properties of the sedimentary solid phase. A new chapter describes properties, occurrence and formation of gas hydrates in marine sediments. The textbook ends with a chapter on model conceptions and computer models to quantify processes of early diagenesis.

Download or read book Dolomites written by B. H. Purser and published by John Wiley & Sons. This book was released on 2009-04-15 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains 23 state-of-the-art papers presented at the Dolomieu Conference on Carbonate Platforms and Dolomitization held in September 1991 in Ortisei, Italy. The conference was co-sponsored by the International Association of Sedimentologists (IAS) and the Society for Sedimentary Geology (SEPM), and marked the 200th anniversary of the 1791 paper by Deodat de Dolomieu describing dolomite in detail for the first time. The papers presented do not aim to give a complete review of the current state of the dolomitic art, but rather discuss important advances and gaps in our knowledge of dolomitization. State-of-the-art papers from worldwide experts. Includes basic science and economic applications.

Download or read book Geochemistry of Marine Sediments written by David J. Burdige and published by . This book was released on 2006-09-10 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: The processes occurring in surface marine sediments have a profound effect on the local and global cycling of many elements. This graduate text presents the fundamentals of marine sediment geochemistry by examining the complex chemical, biological, and physical processes that contribute to the conversion of these sediments to rock, a process known as early diagenesis. Research over the past three decades has uncovered the fact that the oxidation of organic matter deposited in sediment acts as a causative agent for many early diagenetic changes. Summarizing and discussing these findings and providing a much-needed update to Robert Berner's Early Diagenesis: A Theoretical Approach, David J. Burdige describes the ways to quantify geochemical processes in marine sediment. By doing so, he offers a deeper understanding of the cycling of elements such as carbon, nitrogen, and phosphorus, along with important metals such as iron and manganese. No other book presents such an in-depth look at marine sediment geochemistry. Including the most up-to-date research, a complete survey of the subject, explanatory text, and the most recent mathematical formulations that have contributed to our greater understanding of early diagenesis, Geochemistry of Marine Sediments will interest graduate students of geology, geochemistry, and oceanography, as well as the broader community of earth scientists. It is poised to become the standard text on the subject for years to come.

Download or read book Dolomite Reservoirs written by J. R. Allan and published by . This book was released on 1993 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dolomite written by Oleg S. Pokrovsky and published by Nova Publishers. This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dolomite (CaMg(CO)2) is certainly one of the most enigmatic sedimentary minerals on Earth. Its massive deposits of the past have very little contemporary analogues and today, scientists still do not have a consensus on how hundred meter-thick dolomite deposits of the Precambrian age (> 600 million year) were formed across the globe. Recently, the interest in dolomite has risen due to its importance as a major regulator not only of carbon cycle in the past, but also as an important host rock in ongoing projects of CO2 underground storage and sequestration. The growing demand for primary resources also impacted the interest in dolomite and dolomitic rocks, which are now widely used in numerous technological and industrial applications. For these reasons, there is a steady increase of scientific publications linked to dolomite problematics. A Web of Science search (all databases) with dolomite as the topic yielded more than 13,000 papers published from 1950-2015; 4,200 of them were published over the last five years and 8,800 were produced during preceding sixty years. The number of publications concerning use of dolomite in the field of engineering and physical science (non-earth sciences) increased five-fold from the mid-1990s to 2000s, and nowadays contributes to more than a half of all publications on dolomite. This clearly illustrates the rising interest in dolomite for technological applications over the past decade. This book incorporates a large number of disciplines, from geology to chemical engineering of catalysts. It illuminates three main aspects of dolomite as a major sedimentary rock and important technological material: (i) natural occurrence; (ii) laboratory study of dolomite dissolution and precipitation and (iii) applications in various technological aspects. The first two chapters address geological and mineralogical aspects of dolomite deposits in the natural environment (Wagner et al.; Marfil et al). The next three chapters cover the reactivity of dolomite in an aqueous solution (Pokrovsky and Schott), the synthesis of dolomite analogues from aqueous solution (Pina et al) and laboratory precipitation of Mg-bearing carbonates and protodolomite from homogeneous supersaturated solutions (Pokrovsky). Finally, the last two chapters (Ivanets et al., Ryabkov et al.) present the application of dolomite for numerous technological and engineering purposes.

Download or read book Geochemistry and Sedimentology of the Mediterranean Sea written by E.M. Emelyanov and published by Springer. This book was released on 1986-04-30 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: The monograph presented to foreign readers has been prepared by the famous Soviet investigators of processes of geochemistry and sedimentation in the Mediterranean Sea. For more than 20 years E.M. Emelyanov has examined the recent sedimentation of the Mediterranean Sea and K.M. Shimkus has studied the Quaternary and the earlier sedi mentation of the area. The authors, scientific workers from the P.P. Shirshov Institute of Oceanology, USSR Academy of Sciences (Atlantic and Southern Depart ments), took part not only in numerous cruises on oceanographic vessels of the USSR, but in the study of cores of the deep-sea drilling on R/V "Glomar Challenger". A great number of scientific papers and some books devoted to the processes of sedimentation and geochemistry of the Mediterranean Sea were written by them. Although the scientific interests of the authors are not only limited to these questions, I should like to emphasise these aspects of their scientific activity when introducing this book. The Mediterranean Sea is a suitable natural laboratory for solving a number of principal problems of marine sedimentation and lithogenesis.

Download or read book Sedimentology and Geochemistry of Dolostones written by Vijai Shukla and published by American Society of Civil Engineers. This book was released on 1988 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Ocean Drilling Program written by Ocean Drilling Program and published by . This book was released on 1989 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemistry of Skarn and Ore Formation in Dolomites written by Stanislav Mikhaĭlovich Aleksandrov and published by VSP. This book was released on 1998-04 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph reflects the results of a fundamental investigation of metasomatic skarn and ore formation in dolomites, which the author has been conducting for decades. The genetic complication and practical significance of skarn deposits of ores and other minerals found on all continents necessitated comprehensive studying of the processes of their formation, the petrochemical and mineral composition of metasomatic rocks and ores, and their postmagmatic and exogentic alteration. The investigation was based on the latest methods for establishing chemical composition, simulation of hydrothermal ore formation, and on information on the isotope composition of carbon, oxygen, boron and sulfur in ores and minerals. The development in geochemical methods of prognosis, prospecting for, and appraising the quality of skarn ores of various composition proved their merits in the finding of new deposits and promising bodies of new mineral kinds of ores in Russia and other countries.

Download or read book Authigenic Mineral Formation in the Marine Environment written by and published by . This book was released on 2007 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemistry of Sedimentary Ore Deposits written by J.B. Maynard and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an outgrowth of my interest in the chemistry of sedimentary rocks. In teaching geochemistry, I realized that the best examples for many chemical processes are drawn from the study of ore deposits. Consequently, we initiated a course at The University of Cincinnati entitled "Sedimentary Ore Deposits," which serves as the final quarter course for both our sedimentary petrology and our ore deposits sequence, and this book is based on that teaching experience. Because of my orientation, the treatment given is perhaps more sedimentological than is usually found in books on ore deposits, but I hope that this proves to be an advantage. It will also be obvious that I have drawn heavily on the ideas and techniques of Robert Garrels. A number of people have helped with the creation of this book. I am especially grateful to my students and colleagues at Cincinnati and The Memorial University of Newfoundland for suffering through preliminary versions in my courses. I particularly thank Bill Jenks, Malcolm Annis, and Dave Strong. For help with field work I thank A. Hallam, R. Hiscott, J. Hudson, R. Kepferle, P. O'Kita, A. Robertson, C. Stone, and R. Stevens. I am also deeply indebted to Bob Stevens for many hours of insightful discussion.

Download or read book Marine Geochemistry written by Horst D. Schulz and published by Springer. This book was released on 2014-03-12 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of the latest research in this field. The topics comprise the sedimentological examination and physical properties of the sedimentary solid phase, pore water and pore water constituents, organic matter as the driving force of most microbiological processes, biotic and abiotic redox reactions, carbonates and stable isotopes as proxies for paleoclimate reconstruction, metal enrichments in ferromanganese nodules and crusts as well as in hot vents and cold seeps on the seafloor. The current model conceptions lead to the development of different types of computer models, allowing the global mass exchanges between oceans and sediments to be balanced.

Download or read book The 1st SEPM Congress on Sedimentary Geology written by and published by . This book was released on 1995 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Concepts and Models of Dolomitization written by Donald H. Zenger and published by . This book was released on 1980 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemical investigations of the redbed associated stratiform copper mineralization at Kamoto Principal central African copperbelt Zaire written by Lawrence Dana Hoy and published by . This book was released on 1989 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geochemical investigations of the redbed-associated stratiform copper deposit at Kamoto Principal, Zaïre (Chapter 2) are reported here, along with a general investigation of sulfur-carbon chemistry in host sediments at a number of deposits of this type (Chapter 3). At the Kamoto Principal deposit, Cu-Co mineralization occurs within partially evaporitic, littoral marine carbonates situated between subjacent detrital redbeds and superjacent shallow marine dolomitic shales. Petrographic, elemental, and stable isotope studies of two drillcores through the deposit indicate a complex temporal and spatial mineralogical evolution in these sediments. Periods of evaporate mineral formation from hypersaline fluids during host sediment deposition are indicated by evaporate mineral pseudomorphs and quartz mineral textures typical of evaporite mineral deposition. Early diagenetic pyrite formation by bacterial reduction of sea water-derived sulfate is inferred from pyrite inclusions within diagenetic cements (micritic dolomite and authigenic mineral overgrowths). Later diagenetic processes include evaporate mineral replacement by sparry dolomite and clay mineral replacement of detritus. Total dissolution of evaporate minerals, combined with incomplete cementation of the resultant void spaces, produced porous horizons which facilitated later fluid influx. Cu-Co mineral textures include overgrowth and replacement of Cu-poor sulfides by Cu-rich sulfides and sulfide mineral replacement of diagenetic carbonate minerals, indicating a post-diagenetic origin for Cu-Co mineralization. Gross vertical (bedding-perpendicular) sulfide mineral zonation is present, from Cu-rich assemblages (primarily chalcocite) in marine sediments immediately overlying the redbeds and immediately adjacent to the Cu-poor RSC member, to Cu-poor (chalcopyrite, pyrite) assemblages vertically distal to these horizons. C and O isotopic compositions of carbonates from unmineralized horizons are consistent with synsedimentary and diagenetic origins for most dolomite, but systematic decreases in [Dirac Delta]18O corresponding to increasing Cu contents suggest dolomite re-equilibration with hot (~250°C) fluids during Cu mineralization. Sulfur isotope values range from -20 to +18%̥, but approach 0-10%̥ as sulfide (and Cu) contents of the sediments increase. This relationship is interpreted as indicating the partial derivation of sulfide from diagenetic bacterial sulfate reduction (variable [Dirac Delta]34S), with later addition during Cu-Co mineralization of sulfide ([Dirac Delta]34S=10%̥) produced through abiogenic reduction of fluid sulfate by sedimentary organic matter. Major element compositions of the sediments reflect the predominantly clastic (quartz, aluminosilicates) or chemical (carbonate) origin of individual strata, but display secondary variations attributable to diagenetic and/or hydrothermal processes such as clay mineral replacement of detritus (upward decrease in chlorite/K-mineral content ratios) and increased Cu contents at the expense of carbonate in mineralized sediments. Geochemical calculations and phase relations in the Cu-Co-Fe system indicate that mineralization resulted from reaction of hot (T=250°C), slightly acid (pH=4.5), high aO2-low aH2S fluids (reflecting equilibrium with hematitic sediments) with low aO2-high aH2S fluids, pyritic sediments. Systematic bedding-perpendicular chemical (Cu, Co, S) and isotopic ([Dirac Delta]18O, [Dirac Delta]34S) composition changes, combined with vertical sulfide mineral zonation patterns, are interpreted as indicating hydrothermal fluid transport along and influx from aquifer horizons (upper RAT Group rebeds and the incompletely dolomitized, initially evaporitic RSC member). Step-wise metal (Cu, Co, Fe) content zonation away from the inferred aquifers suggests progressive saturation f metals results from fluid chemical changes during sediment-water interaction. Fluid heating and migration is hypothesized to have resulted from intrusive igneous activity related to continental extension in an environment of incipient rift development. In Chapter 3, carbon-sulfur isotopic and geochemical relationships at a number of redbed-associated stratiform copper deposits are compared to those associated with normal marine sediments. The purpose of this study was to test the hypothesis presented in many genetic models from the genesis of redbed-associated stratiform copper mineralization (based mainly upon a wide variation in observed sulfur isotope values at these deposits) that the sulfide with which Cu and other metals are fixed in the sediments originated by bacterial sulfate reduction at low temperatures. However, the available geochemical data such as the [Dirac Delta]34S values of sulfides and the total sulfide and residual organic carbon contents from the host sediments at some depistis do not appear to be consistent with an origin for the sulfide by the process only. The study presented in Chapter 3 approaches the problem by first defining an arithmetic method based on the Rayleigh distillation formula and mass-balance considerations for predicting the probable [Dirac Delta]34S-total sulfide content-organic carbon content relationships which could be expected in the sediments if the sulfide was derived solely by bacterial sulfate reduction processes. The model is then extended to permit consideration of an alternative explanation for the observed data distributions, namely, the isotopically distinct sulfide was added to the sediments following early diagenetic production of sulfide by bacterial sulfate reduction. Data from three deposits were examined using the model. At White Pine, the data indicate a quantitatively minor addition of secondary sulfide having [Dirac Delta]34S= ~ 20 %̥. At both the Kamoto Principal and Musoshi, Zaïre, deposits the data suggest addition of significant quantities of secondary sulfide having [Dirac Delta]34S = ~ 9 %̥, this additional sulfide was most likely generated at the depositional site by abiogenic sulfate reduction during the introduction of the Cu-bearing fluids. At Kamoto Principal, the model has been used to calculate estimated conditions involved in the sulfide deposition processes. After early digenesis, the average sulfide content of the sediments was 1.5 wt. %, requiring a minimum associated oxidation (and loss from sediments) of 1.1 wt. % organic carbon. An average of 1.2 wt. % sulfide was added later, involving an estimated loss through oxidation of 0.9 wt. % organic carbon. Model calculations and thermochemical data pertaining to the hydrothermal fluids responsible for Cu-Co mineralization indicate that transport of this secondary sulfide to the depositional site would have requires a water-rock mass ratio of about 175. It is concluded, based on the model, that about half of the observed sulfide at Kamoto Principal and 25% of the sulfide at Musoshi resulted from a second stage of sulfide deposition, demonstrating the utility of such quantitative investigations for genetic interpretations.