Монография посвящена теории и практике экспериментального моделирования природных сорбционно-осадительных геохимических барьеров. Проанализированы существующие подходы и методы экспериментального моделирования низкотемпературных геохимических процессов. Разработаны и верифицированы по данным натурных наблюдений экспериментальные модели четырех сорбционно-осадительных геохимических барьеров в океане, играющих важную роль в экзогенном рудообразовании и формировании эколого-геохимического состояния окружающей среды: подводных гидротермальных плюмов, диагенетического фосфоритообразования, зон смешения речных вод и вод кислых вулканических источников с морской водой.
Для геохимиков, геологов, географов, океанологов, экологов.

В монографии систематизированы и обобщены данные о миграции фосфора на разных этапах глобального гидрологического цикла. Приведены новые оценки среднего содержания фосфора в атмосферном аэрозоле, атмосферных осадках, водах первичной гидрографической сети, средних и крупных рек мира. Определены потоки фосфора в атмосфере, материковом стоке, Мировом океане.

Isotope geochemistry has grown over the last 60 years to become one of the most important fields in the earth sciences. It has two broad subdivisions, namely, radiogenic isotope geochemistry and stable isotope geochemistry. These subdivisions reflect the two primary reasons why the relative abundances of isotopes of elements vary in nature, which are radioactive decay and chemical fractionation; in this context, “fractionation” is any process in which the isotopes of the same element behave differently.

Chapter 1 Geochemical and Sedimentation History of Neogene Lacustrine Sediments from the Valjevo-Mionica Basin (Serbia)
Aleksandra Šajnović, Ksenija Stojanović, Vladimir Simić and Branimir Jovančićević
Chapter 2 Arsenic Geochemistry in Groundwater System
Dionisios Panagiotaras, George Panagopoulos, Dimitrios Papoulis and Pavlos Avramidis

Chapter 3 Geochemistry of Hydrothermal Alteration in Volcanic Rocks
Silvina Marfil and Pedro Maiza

The Mediterranean Sea lies between Europe, Asia and Africa in an area famous for its ancient civilizations and cultural developments. It was an area where marine navigation was developed and where many trade routes intersected. The publication of one of the first monographs on marine geology and geography by Marsilli in 1725 suggests that the Mediterranean Sea was the cradle of marine geology.

It is known that methane (and, in smaller amounts, higher hydrocarbons) is liberated during the coalification process. The amounts of methane developed vary in the different stages of coalification. Calculations on the basis of ultimate analyses of coals of different rank done by Mott (1943), Patteisky(1952, 1964) and Jüntgen and Karweil (1966) lead to the conclusion that greater amounts of methane start to be developed when the stage of bituminous coals with about 30% of volatile matter (dry and ash-free) is reached, whereas the gas developed from lignite and less metamorphosed bituminous coals is mainly carbon dioxide.

The Quaternary deposits of the Eastern Gulf of Finland

The influence of ferromanganese concretions-forming processes in the Eastern Gulf of Finlandon the marine environment

Distribution of heavy metals and arsenic in soft surface sediments of the coastal area off Kotka, North-Eastern Gulf of Finland, Baltic Sea

Seafloor anoxia and modern laminated sediments in coastal basins of the Eastern Gulf of Finland, Baltic Sea

Background concentrations of trace metals in modern muddy clays of Eastern Gulf of Finland, Baltic Sea

This book is about geochemical data and how they can be used to obtain information about geological processes. Conventionally geochemical data are subdivided into four main categories: the major elements, trace elements, radiogenic isotopes and stable isotopes (see Table 1.1 ). These four types of geochemical data each form the subject of a chapter of this book. Each chapter shows how the particular form of geochemical data can be used and how it provides clues to the origin of the suite of rocks in question. Different methods of data presentation are discussed and their relative merits evaluated. <...>

This guidebook is dedicated to ultramafic-mafic intrusions, volcanic rocks and the world-class PGE-Cu-Ni sulfide deposits of the Noril’sk Province, Polar Siberia. The characteristics of geology, mineralogy and geochemistry of volcanic rocks and ore-bearing ultramafic-mafic intrusions are briefly outlined. The proposed excursion stops include inspection of the different volcanic and intrusive rocks, associated PGE-Cu-Ni sulfide ores from drill cores and bedrock outcrops. In addition, an open pit Medvezhy Ruchei and two mines (Oktyabrsky and Taimyrsky) collectively provide an overview of the Noril’sk-type intrusions and associated disseminated and massive PGE-Cu-Ni sulfide ores.

Обогащенные PGE–(REE–Ti) элементами включения микрометрового размера, минеральные ассоциации, вариации состава и потенциальный источник минералов платиновой группы в россыпной зоне Сисим, Восточные Саяны, Россия.

We report the results of a mineralogical investigation of placer samples from the upper reaches of the Sisim watershed, near Krasnoyarsk, in Eastern Sayans, Russia. The placer grains are predominantly Os–Ir–(Ru) alloys (80%) that host various inclusions (i.e., platinum-group elements (PGE)-rich monosulfide, PGE-rich pentlandite, Ni–Fe–(As)-rich laurite, etc.) and subordinate amounts of Pt–Fe alloys.