Mineralogical Criteria for Genetic Relationship of Igneous and Carbonatite Rocks of the Tomtor Massif (Siberian Platform)

Abstract The Tomtor massif, located in the north-east of the Siberian Platform, is a polychronous zonal-ring complex of alkaline ultrabasic rocks and carbonatites containing a unique deposit of Nb and REE. A comparative analysis of the typomorphic features of minerals of different types of silicate rocks and carbonatites of the Tomtor massif is given in order to establish their convergent features. In order to exclude the mutual influence of rocks formed at different times on each other, samples were taken from different dispersed independent pipe-like bodies of melteigites, a sheet body of alkaline picrites and a transverse dike of carbonatite located south of the Tomtor massif, as well as from alkaline syenites from the southern margin of the massif. It is shown that interesting convergent features are identified in the rock-forming and accessory minerals, including rare-metal ore minerals of different silicate igneous rocks and carbonatite formations. Rock-forming minerals - pyroxenes, micas, feldspars, feldspathopids, garnets, as well as basic and rare carbonates, oxide ore minerals, including Cr-containing spinelides, and sulfide and other exotic phases have such features. The confirmation of the convergence of a group of obvious high-temperature early magmatic elements-MgO, Cr, and Ni - with a group of CaO, CO2, H2O, P2O5, and Y components forming carbonatite derivatives was the most interesting nuance in this regard. Existence of such polychromous complicated ore-magmatic ring complexes as Tomtor massif indicates occurrence of intraplate deep large magma-generating hearths in lithosphere mantle. Such easily fusible hearths, conserved in lithosphere mantle of residual melts of kimberlite, alkali-picrites, carbonatite compositions, under the subsequent favorable geodynamic settings, are subject to rapid flotation, undergoing decompression melting and forming concentric-zonal platform complexes of alkali ultrabasic rocks with carbonatites

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Further Investigation upon the Water Movements in the English Channel. Drift-Bottle Experiments in the Summers of 1927, 1928 and 1929, with Critical Notes on Drift-Bottle Experiments in General.

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400051869 ◽

1930 ◽

Vol 17 (1) ◽

pp. 241-275 ◽

Cited By ~ 15

Author(s):

J. N. Carruthers

Keyword(s):

Wind Speed ◽

North Sea ◽

English Channel ◽

The North ◽

Different Types ◽

The North Sea ◽

The Common ◽

Relationship Of ◽

Great Simplicity ◽

Simple Surface

In July–August of three different years common surface-floating bottles were set adrift at International Station E2 (49° 27' N.—4° 42' W.). With them, various types of drag-fitted bottles were also put out. The journeys accomplished are discussed, and the striking differences as between year and year in the case of the common surface floaters, and as between the different types in the same year, are commented upon in the light of the prevailing winds. An inter-relationship of great simplicity is deduced between wind speed and the rate of travel of simple surface floating bottles up-Channel and across the North Sea from the results of experiments carried out in four different summers.

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ABOUT ANCIENT SOURCES OF DIAMONDS PLACERS

Proceedings of higher educational establishments Geology and Exploration ◽

10.32454/0016-7762-2018-4-44-54 ◽

2018 ◽

pp. 44-54

Author(s):

N. N. ZINCHUK

Keyword(s):

Siberian Platform ◽

Primary Sources ◽

Complex Investigation ◽

North East ◽

The North ◽

Upper Paleozoic ◽

Middle Paleozoic ◽

History Of ◽

Recent Sediments ◽

Thick Layers

Basing on generalization of large actual material on complex investigation of diamond, its characteristic in Upper Paleozoic and Mesozoic sedimentary thick layers of the Siberian platform has been provided. It has allowed receiving new data on composition features and distribution of diamond in recent sediments of main diamondiferous regions of Lena-Anabar, Central-Siberian and Tungusskaya sub-provinces. On the north-east of Siberian platform, the region of Kyutyungdinsky graben and nearby territories, perspective for the discovery of rich kimberlite bodies with specific dia- monds, are of the most interest. Special attention has been paid to the Central-Siberian sub-province, where it has been convincingly shown that the area of development of individual diamond macro- associations is limited by a specific diamondiferous region, within which complexes of different in age terrigenous and coastal Upper Paleozoic and Mesozoic sediments are developed. The complex of features of diamonds from placers of the described platform testifies by morphology, coloration, hard inclusions, internal structure, photoluminescence and admixture composition about plurality of primary sources and availability of still undiscovered kimberlite bodies within many diamondiferous regions. Application of typomorphic features of crystals for restoration of exogenous history of diamonds on the path from primary sources to the sites of modern allocation in placers, as well as for paleogeographical reconstructions of distribution of ancient productive thick layers and clarification of diamondiferous material drift direction, has a significant importance. Proximity of typomorphic features of diamonds in sedimentary thick layers of these ages, identified in some diamondiferous regions, testifies about formation of these collectors due to washout of more ancient productive layers or Middle Paleozoic primary sources. Polygeny of mineralogical associations of diamonds from different in age placers within some diamondiferous regions has been noted, which may be successfully used when forecasting and prospecting primary sources of the mineral.

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Early Ordovician trilobites and molluscs from the Poulsen Cliff Formation, Washington Land, western North Greenland

Bulletin of the Geological Society of Denmark ◽

10.37570/bgsd-1990-38-02 ◽

1990 ◽

Vol 38 ◽

pp. 11-32

Author(s):

R. A. Fortey ◽

]. S. Peel

Keyword(s):

Shallow Water ◽

Siberian Platform ◽

Gastropod Species ◽

Early Ordovician ◽

North East ◽

The North ◽

Close Relationship ◽

North Greenland ◽

Subjective Synonym

A well-preserved, shallow water bathyurid trilobite fauna of early Ordovician age, and associated gastropods and an undetermined hyolith are described from the Poulsen Cliff Formation of Washington Land, western North Greenland. Two new bathyurid species, Licnocephala sminue and Pe/tabellia elegans, and a new gastropod species, Plethospira(?) floweri, are described. Biolgina Maximova is considered a junior subjective synonym of Peltabellia Whittington. The distribution of the genus is an example of close relationship between shallow water trilobite faunas of Laurentia and the North-east Siberian platform in the early Ordovician.

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Globally Speaking

Organised Sound ◽

10.1017/s1355771808000174 ◽

2008 ◽

Vol 13 (2) ◽

pp. 137-140 ◽

Cited By ~ 1

Author(s):

Trevor Wishart

Keyword(s):

Electroacoustic Music ◽

Digital Recording ◽

Recording Equipment ◽

High Quality ◽

Cultural Experience ◽

North East ◽

The North ◽

Local Sound ◽

Relationship Of ◽

The Relationship

AbstractCheaply available high-quality digital recording equipment, and the ubiquity of computer music tools and the Internet make the creation of electroacoustic music in diverse localities, and its dissemination around the globe, extremely easy. This raises important questions about the relationship of local sound worlds and cultural experience to a potentially global audience. This quandary is examined through the compositions Globalalia (which deals explicitly with speech material from many languages) and Fabulous Paris – a virtual oratorio whcih uses speech in different ways to contrast our relationship to the local and personal with our relationship to the mass experience of the globalised mega-city. The problems in relating to both a local and a global audience are considered in relation to the composer's current project recording speech materials in local communities in the North East of England.

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Modernization of Universities through Greater Interaction with Small Firms

Industry and Higher Education ◽

10.1177/095042229901300204 ◽

1999 ◽

Vol 13 (2) ◽

pp. 119-126 ◽

Cited By ~ 2

Author(s):

Fiona Tilley ◽

David Johnson

Keyword(s):

Higher Education ◽

Small Firms ◽

Best Practice ◽

Business Sector ◽

North East ◽

The North ◽

The Uk ◽

Political Economic ◽

Relationship Of ◽

The Relationship

This paper explores the ‘best practice’ interactions between universities and small firms in the UK. The purpose is to identify ways in which a university can build stronger and more effective links with small firms. The relationship between universities and small firms is of growing importance. There are political, economic and educational pressures which influence the behaviour and relationship of higher education toward the business sector, and small firms in particular. The wider context of the changes taking place within higher education are discussed. This is followed by the initial findings from a recently completed research project for the Council for Industry and Higher Education which investigated the foremost components in ‘best practice’ interactions and linkages between small firms and universities in the North East of England. Some preliminary ideas are suggested on how best practice can be further facilitated. These proposals are then interpreted in terms of the operational implications for universities and other strategic organizations involved in building linkages with small firms.

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Serpentinites in the North-East Ox Mountains, Eire

Geological Magazine ◽

10.1017/s0016756800050512 ◽

1966 ◽

Vol 103 (2) ◽

pp. 124-137 ◽

Cited By ~ 6

Author(s):

G. G. Lemon

Keyword(s):

Fracture Zone ◽

Additional Information ◽

North East ◽

The North ◽

Relationship Of ◽

Boundary Fracture ◽

First Time ◽

The Relationship

AbstractSix serpentinites occur in the Moinian granulites of the North-East Ox Mountains. Four have been known for some time and have been previously described. Additional information on these and the associated vermiculite deposits is provided. The remaining two serpentinites are described for the first time. A pyroxenite vein associated with one of these may have been produced by meta-morphic regeneration.The relationship of some of these serpentinites to the probable position of the Highland Boundary Fracture-zone in Eire is also discussed. Brief comparison is made with serpentinites occurring in the Scottish Moinian.

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To name but a few: descriptions of five new species of Terebellides (Annelida, Trichobranchidae) from the North East Atlantic

ZooKeys ◽

10.3897/zookeys.992.55977 ◽

2020 ◽

Vol 992 ◽

pp. 1-58

Author(s):

Julio Parapar ◽

María Capa ◽

Arne Nygren ◽

Juan Moreira

Keyword(s):

Morphological Characters ◽

Nominal Species ◽

East Atlantic ◽

Type Specimens ◽

North East ◽

The North ◽

Putative Species ◽

Different Types ◽

Thoracic And Abdominal

The number of described species of the genus Terebellides Sars, 1835 (Annelida, Trichobranchidae) has greatly increased in the last years, particularly in the North East Atlantic. In this context, this paper deals with several putative species recently delineated by molecular means within a well delimited clade of Terebellides. Species are characterised here by a combination of morphological characters, and a complementary nucleotide diagnostic approach. Three species were identified as the nominal species T. stroemii Sars, 1835, T. bigeniculatus Parapar, Moreira & Helgason, 2011 and T. europaeaLavesque et al., 2019. Five species are described as new: T. bakkenisp. nov., T. kongsrudisp. nov., T. norvegicasp. nov., T. ronningaesp. nov. and T. scoticasp. nov. The distinctive morphological characters refer to the branchial shape, absence or presence of papillae on lamellae of anterior margin of branchial dorsal lobes, absence or presence of ciliated papillae dorsal to thoracic notopodia, geniculate chaetae in one or two chaetigers, and the morphology of thoracic and abdominal uncini teeth. Furthermore, the description of T. bigeniculatus is revised and complemented after examination of type specimens. An updated identification key to all species of the genus in NE Atlantic and a proposal of a classification of different types of abdominal uncini to be used in taxonomy are also included.

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