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Aldan Shield
Aldan Shield (russian: Алданский щит) is a shield in Siberia. It is an exposed basement of the Siberian Craton. Together with the Anabar Shield further to the northwest, the Aldan Shield is one of the main features of the craton. The Aldan Shield geological region coincides geographically with parts of the Aldan Highlands and Olyokma-Chara Plateau, located at the southern end of the Sakha Republic and the eastern end of Irkutsk Oblast.Google Earth The exposed crust parts of the shield date back to the Archean and reflect the first phases of accretion of the crust. They only emerge in a few areas, the eastern and northern sectors of the shield being largely covered by sediments accumulated between the end of the Precambrian and the Cambrian, while in the western and southern regions they have undergone processes of tectonic rejuvenation that have brought about the formation of new structures above and below. On the Aldan Shield there is the only charoite deposit know ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sibiria Craton NO
Sibiria is a Swedish indie pop band from Östersund, signed by the record label Hybris (record label), Hybris. It was founded in 2003 by the guitarist Martin Abrahamsson (also in the band Vapnet), the singer Martin Hanberg (Vapnet) and the guitarist Erik Laquist. In 2006, the drummer Eric Ramsey joined the band. Discography Albums *''Norrlands Inland'' (September 28, 2005) *''Inom Familjen'' (November 15, 2006) Singles *"Sibiria" (CDR) (April 2, 2003) *"Ljusdal" (CDR) (February 11, 2004) *"#3" (CDR) (August 8, 2004) *"Christian Olsson" (CDR) (August 8, 2005) *"(Jag kunde ha varit) Vem som helst" (MP3) (September 17, 2005) *"Omtagning" (CDR) (June 25, 2006) *"Det har varit svårare" (MP3) (October 25, 2006) External links Official website {{Authority control Swedish musical groups ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambrian
The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million years ago (mya) to the beginning of the Ordovician Period mya. Its subdivisions, and its base, are somewhat in flux. The period was established as "Cambrian series" by Adam Sedgwick, who named it after Cambria, the Latin name for 'Cymru' (Wales), where Britain's Cambrian rocks are best exposed. Sedgwick identified the layer as part of his task, along with Roderick Murchison, to subdivide the large "Transition Series", although the two geologists disagreed for a while on the appropriate categorization. The Cambrian is unique in its unusually high proportion of sedimentary deposits, sites of exceptional preservation where "soft" parts of organisms are preserved as well as their more resistant shells. As a result, our understanding of the Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of The Sakha Republic
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of Earth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunguska Basin
The Tunguska Basin is a sedimentary basin, in Siberia. Geography Much of the Siberian Traps Large Igneous Province is inside. The area is of about in Krasnoyarsk Territory and Sakha Republic, between the Yenisei and Lena rivers. It contains a huge untapped coal reserve. Its main settlements there are Norilsk, Igarka, and Yeniseisk. The Tunguska rivers cross the basin. On June 30, 1908, near the Stony Tunguska River the Tunguska Event took place. Geology Boreholes in the Tunguska Basin indicate ubiquitous and abundant sills, which have great lateral extension. The Tunguska Basin makes up much of the Siberian Craton and has several subbasins. See also * Tunguska Plateau The Tunguska Plateau ( rus, Тунгусское плато) is a mountain plateau in Krasnoyarsk Krai, Siberia, Russia. It is a part of the Central Siberian Plateau. The plateau is located in largely uninhabited area, the village of Noginsk was ... References External links Encyclopedia.com refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Shields And Cratons
A craton is an ancient part of the Earth's continental crust which has been more or less stable since Precambrian times. Cratons whose ancient rocks are widely exposed at the surface, often with relatively subdued relief, are known as shields. If the ancient rocks are largely overlain by a cover of younger rocks then the 'hidden' craton may be referred to as a platform. List of shields * Western Ethiopian Shield * Amazonian Shield of central South America **Guiana Shield **Guaporé or Central Brazilian Shield * The Angaran Shield of West Siberia *Arabian-Nubian Shield * (Western) Australian Shield * Baltic Shield of Scandinavia and Eastern Europe *Canadian Shield a.k.a. Laurentian Shield *The China-Korean Shield containing the North China Craton *The East Antarctic Shield containing the East Antarctic Craton *Indian Shield *Man Shield List of named cratons Listed by modern continent and Gondwana, include: West Gondwana South America *Amazonian Craton **Guiana Shield ** ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctica
Arctica or Arctida was an ancient continent which formed approximately 2.565 billion years ago in the Neoarchean era. It was made of Archaean cratons, including the Siberian Craton, with its Anabar/Aldan shields in Siberia, and the Slave, Wyoming, Superior, and North Atlantic cratons in North America. Arctica was named by because the Arctic Ocean formed by the separation of the North American and Siberian cratons. Russian geologists writing in English call the continent "Arctida" since it was given that name in 1987, alternatively the Hyperborean craton, in reference to the hyperboreans in Greek mythology. Nikolay Shatsky () was the first to assume that the crust in the Arctic region was of continental origin. Shatsky, however, was a "fixist" and, erroneously, explained the presence of Precambrian and Paleozoic metamorphic rocks on the New Siberian, Wrangel, and De long Islands with subduction. "Mobilists", on the other hand, also erroneously, proposed that North Amer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akitkan
The Akitkan Range (russian: хребет Акиткан; zh, 阿基特坎山) is a mountain range in Irkutsk Oblast and Buryatia, Russian Federation.Google Earth The Paleoproterozoic Akitkan Orogen is named after the range. History Between 1855 and 1858 Ivan Kryzhin (d. 1884) took part in the Eastern Siberian expedition led by Russian astronomer and traveler Ludwig Schwarz. In 1857 he mapped the Kirenga River and, while exploring its right tributary, the Cherepanikha, Kryzhin discovered the formerly unknown Akitkan Range rising above the area of its source. The North Baikal Highlands, where the range rises, were explored between 1909 and 1911 by Russian geologist Pavel Preobrazhensky (1874 - 1944). He surveyed the river valley of the Chechuy, a right tributary of the Lena with its sources in the Akitkan. Overcoming numerous difficulties, Preobrazhensky managed to map for the first time a stretch of the Akitkan Range. Geography The Akitkan stretches roughly northwards for o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yuksporite
Yuksporite is a rare inosilicate mineral with double width, unbranched chains, and the complicated chemical formula . It contains the relatively rare elements strontium, titanium and niobium, as well as the commoner metallic elements potassium, calcium, sodium and manganese. As with all silicates, it contains groups of linked silicon and oxygen atoms, as well as some associated water molecules. Yuksporite is a member of the umbite group that has just two known members, umbite, , and yuksporite. It was first reported in 1922, from nepheline syenite occurrences in the Kola Peninsula, Russia, and named by Alexander Fersman for the locality, near Mount Yukspor. Unit cell Yuksporite was originally thought to be orthorhombic, space group unknown. In 2004, however, the structure was solved using synchrotron radiation and found to be monoclinic 2/m with space group P21/m. The monoclinic unit cell has two formula units per cell (Z = 2) and side lengths a = 7.126 Å, b = ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tausonite
Tausonite is the rare naturally occurring mineral form of strontium titanate: chemical formula: SrTiO3. It occurs as red to orange brown Cubic crystal system, cubic crystals and crystal masses. It is a member of the perovskite group. It was first described in 1982 for an occurrence in a syenite Intrusive rock, intrusive in Tausonite Hill, Murun Massif, Olyokma-Chara Plateau, Sakha Republic, Yakutia, geologically part of the Aldan Shield, Eastern-Siberian Region, Russia. It was named for Russian geochemist Lev Vladimirovich Tauson (1917–1989). It has also been reported from a fenite Dike (geology), dike associated with a carbonatite complex in Sarambi, Concepción Department (Paraguay), Concepción Department, Paraguay. and in high pressure metamorphic rocks along the Kotaki River area of Honshu Island, Japan. References {{Reflist Oxide minerals Titanium minerals Strontium minerals Cubic minerals Minerals in space group 221 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frankamenite
Frankamenite is the fluorine-dominate variation of the rare mineral canasite with a general formula of K3Na3Ca5(Si12O30) ,(OH)sub>4·(H2O). Frankamenite belongs to the triclinic crystal system, with the bases of its structure containing Ca-Na mixed octahedra joined by octagonal tubes SiO4 of the composition (Si12O30). Frankamenite has six Ca-Na mixed positions distributed amongst these octahedra, reflecting its varying compositions. Frankamenite was named for the Russian mineralogist- crystallographer V. A. Frank-Kamentsky (1915–1994), who discovered the mineral. Frankamenite occurs in association with the rare mineral charoite, which is found only in the Murun Massif of the Olyokma-Chara Plateau, Aldan Shield, Sakha Republic, Yakutia, Siberia, Russia. Here, metasomatism enriches a syenite massif with potassium when it comes into contact with a limestone at around 200–250 °C. This metamorphic process produces a potassium feldspar Potassium feldspar refers to a number ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brookite
Brookite is the orthorhombic variant of titanium dioxide (TiO2), which occurs in four known natural polymorphic forms (minerals with the same composition but different structure). The other three of these forms are akaogiite (monoclinic), anatase (tetragonal) and rutile (tetragonal). Brookite is rare compared to anatase and rutile and, like these forms, it exhibits photocatalytic activity. Brookite also has a larger cell volume than either anatase or rutile, with 8 TiO2 groups per unit cell, compared with 4 for anatase and 2 for rutile.Anatase and Brookite . Wikis.lib.ncsu.edu (2007-05-08). Retrieved on 2011-10-14. (Fe), |
Murun Massif
Murun (russian: Мурун) is a mountain in the Olyokma-Chara Plateau, at the border of Irkutsk Oblast and Yakutia, Russian Federation. Geography A high summit is the highest point of the Murun Massif in the Olyokma-Chara Plateau, part of the South Siberian mountain system. The massif is about across and rises in the central/southern part of the plateau, above the right bank of the Chara, west of the valley of the Tokko, at the southwestern end of the Sakha Republic, bordering with Irkutsk Oblast, near the tripoint with Zabaykalsky Krai. The mountain is near Torgo, an abandoned settlement in Olyokminsky District.Google Earth The Murun peak is marked as a summit in the O-50 sheet of the Soviet Topographic Map. This same mountain, however, is a peak in the D-7 sheet of the Defense Mapping Agency Navigation charts. The Irkutsk Oblast-Yakutia border runs across the middle of the Murun Massif and the peak rises on the western, or Irkutsk Oblast side. Geology The massif is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
