Fe-Mn nodules and host sediments from the Gulf of Finland

Distributions of major and trace elements in ferromanganese nodules, which are buried or exposed on the sea floor and in host sediments, were studied in ten concretion/sediment pairs by various physical and chemical methods. It was established that, in addition to Fe and Mn, a limited number of major and trace elements (P, Ca, Sr, Ba, Mo, Co, Zn, Ni, As, Pb, Sb, Tl, U, W, Y, and Ga) is accumulated with variable degree of intensity (relative to sediments) in the nodules. The maximal content of Mn in the nodules is 100 times higher than in the host sediments, whereas for all other elements listed above these ratios vary from more than one to 10-20. Manganese and, to a lesser extent, Ba and Sr are concentrated in the buried concretions. Other elements are primarily concentrated in concretions exposed on the sea floor. The occurrence mode of the concretions and compositional data on interstitial water suggest that metals in the concretions derive from seawater and suspended particulates, in addition to sediments. Burial of concretions in the sediment pile is accompanied by alteration of their composition, accumulation of Mn (relative to Fe), and loss of several associated metals.

Sweden and Finland, 1747 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Svea ock Göta riken med Finland ock Norland afritade i Stockholm, år 1747, G. Biurman sculp. It was published in 1747. Scale [ca. 1:2,500,000]. Covers portions of Sweden and Finland, and surrounding countries in outline. Map in Swedish.The image inside the map neatline is georeferenced to the surface of the earth and fit to the Europe Lambert Conformal Conic coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial and administrative boundaries, shoreline features, and more. Relief shown pictorially. Includes inset map of Norrland.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Invaliditetsförsäkringkomiténs publikation no. : I[-V].

Mode of access: Internet.

Protokoll i sammandrag.

At head of title: Lantdagen (Landtdagen), 1908-1918; Riksdagen, 1919- ; Riksmötet, 2001-

Po russkoi zemli e ; geograficheskie ocherki i kartiny dli a chteni i a v sem i e i shkoli e /

Chapters on: Northern Region, Finland, Lake Region, Byelorussia, Volga Region, Interior Province, Ural Region, Little Russia (Ukraine), Steppe Region, Crimea, Caucasus, Siberia, Central Asia

Protokoll fördt hos vällofliga Borgareståndet å Landtdagen i Helsingfors.

Mode of access: Internet.