Accedi

Bibliografie tematiche / Stratigraphic Proterozoic / Tesi

Segui questo link per vedere altri tipi di pubblicazioni sul tema: Stratigraphic Proterozoic.

Tesi sul tema "Stratigraphic Proterozoic"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 gennaio 2023

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Vedi i top-50 saggi (tesi di laurea o di dottorato) per l'attività di ricerca sul tema "Stratigraphic Proterozoic".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Vedi le tesi di molte aree scientifiche e compila una bibliografia corretta.

1

Strauss, Toby Anthony Lavery. "The geology of the Proterozoic Haveri Au-Cu deposit, Southern Finland." Thesis, Rhodes University, 2004. http://hdl.handle.net/10962/d1015978.

Testo completo

Abstract (sommario):

The Haveri Au-Cu deposit is located in southern Finland about 175 km north of Helsinki. It occurs on the northern edge of the continental island arc-type, volcano-sedimentary Tampere Schist Belt (TSB) within the Palaeoproterozoic Svecofennian Domain (2.0 – 1.75 Ga) of the Fennoscandian Shield. The 1.99 Ga Haveri Formation forms the base of the supracrustal stratigraphy consisting of metavolcanic pillow lavas and breccias passing upwards into intercalated metatuffs and metatuffites. There is a continuous gradation upwards from the predominantly volcaniclastic Haveri Formation into the overlying

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Baghiyan-Yazd, Mohammad Hassan. "Palaeoichnology of the terminal Proterozoic-Early Cambrian transition in central Australia : interregional correlation and palaeoecology." Title page, table of contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phb1445.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Li, Longming, and 李龙明. "The crustal evolutionary history of the Cathaysia Block from the paleoproterozoic to mesozoic." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45693596.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Zhao, Junhong, and 趙軍紅. "Geochemistry of neoproterozoic arc-related plutons in the Western margin of the Yangtze Block, South China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40203748.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Wang, Wei, and 王伟. "Sedimentology, geochronology and geochemistry of the proterozoic sedimentary rocks in the Yangtze Block, South China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/196033.

Testo completo

Abstract (sommario):

The South China Craton comprises the Yangtze Block in the northwest and Cathaysia Block in the southeast. Located in the southeastern Yangtze Block, the Jiangnan Orogen formed through the amalgamation between the Yangtze and Cathaysia Blocks. The Yangtze Block has sporadically exposed Archean rocks in the north, Paleoproterozoic to Mesoproterozoic volcano-sedimentary sequences in the southwest and widespread Neoproterozoic sedimentary sequences accompanied by syn-sedimentary igneous rocks on the western and southeastern margins. The late Paleoproterozoic to early Mesoproterozoic Dongchuan, Da

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Swift, Peter Norton. "EARLY PROTEROZOIC TURBIDITE DEPOSITION AND MELANGE DEFORMATION, SOUTHEASTERN ARIZONA." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/187544.

Testo completo

Abstract (sommario):

Greenschist-facies, Lower Proterozoic metasedimentary rocks of the Johnny Lyon Rills and Little Dragoon Mountains of southeastern Arizona were deposited prior to the intrusion of an approximately 1690 Ma rhyodacite pluton. Well-preserved primary structures indicate deposition by turbidity currents in an intermediate to neardistal setting. Sandstone compositions suggest derivation from either a complex, heterogeneous source or multiple source terranes that provided mature, quartzose sediment as well as lesser quantities of volcaniclastic detritus. Earliest deformation, predating both intrusion

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Baldim, Maurício Rigoni 1983. "O domo gnáissico Alto Alegre, transição embasamento-greenstone belt do Rio Itapicuru : evolução e significado tectônico." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/286596.

Testo completo

Abstract (sommario):

Orientador: Elson Paiva de Oliveira<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociências<br>Made available in DSpace on 2018-08-26T10:50:20Z (GMT). No. of bitstreams: 1 Baldim_MauricioRigoni_M.pdf: 19163752 bytes, checksum: da3d83e0ed883c0984d79ed906f0528c (MD5) Previous issue date: 2014<br>Resumo: Domos gnáissicos são estruturas que podem estar associadas tanto aos orógenos extensionais quanto aos colisionais. Em orógenos colisionais, normalmente balizam os distintos terrenos dispondo-se em corredores estruturais. Na região nordeste do Cráton São Francisco

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Lane, Robert Andrew. "Geologic setting and petrology of the Proterozoic Ogilvie Mountains breccia of the Coal Creek inlier, southern Ogilvie Mountains, Yukon Territory." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29196.

Testo completo

Abstract (sommario):

Ogilvie Mountains breccia (OMB) is in Early (?) to Late Proterozoic rocks of the Coal Creek Inlier, southern Ogilvie Mountains, Yukon Territory. Host rocks are the Wernecke Supergroup (Fairchild Lake, Quartet and Gillespie Lake groups) and lower Fifteenmile group. Distribution and cross-cutting relationships of the breccia were delineated by regional mapping. OMB was classified by clast type and matrix composition. Ogilvie Mountains breccia crops out discontinuously along two east-trending belts called the Northern Breccia Belt (NBB) and the Southern Breccia Belt (SBB). The NBB extends across

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Stewart, Kathryn. "High temperature felsic volcanism and the role of mantle magmas in proterozoic crustal growth : the Gawler Range volcanic province /." Title page, contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phs8488.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Harris, Charles William. "A sedimentological and structural analysis of the Proterozoic Uncompahgre Group, Needle Mountains, Colorado." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/79644.

Testo completo

Abstract (sommario):

Siliciclastic sediments of the Proterozoic Uncompahgre Group can be subdivided into stratigraphic units of quartzite (Q) and pelite (P); these units include a basal, fining- and thinning-upward retrogradational sequence (Q1-P1) that records the transition from an alluvial to a shallow-marine setting. Overlying the basal sequence are three thickening- and coarsening-upward progradational sequences (P2-Q2, P3-Q3 and P4-Q4) that were influenced by tide-, storm- and wave-processes. The progradational units are subdivided into the following facies associations in a vertical sequence. Outer-to inner

Gli stili APA, Harvard, Vancouver, ISO e altri

11

Haines, Peter W. "Carbonate shelf and basin sedimentation, late Proterozoic Wonoka Formation, South Australia /." Title page, contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09phh152.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

12

Saylor, Beverly Z. (Beverly Zella). "Sequence stratigraphic and chemostratigraphic constraints on the evolution of the terminal Proterozoic to Cambrian Nama Basin, Namibia." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10668.

Testo completo

Abstract (sommario):

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1996.<br>Includes bibliographical references (p. 117-124).<br>by Beverly Z. Saylor.<br>Ph.D.

Gli stili APA, Harvard, Vancouver, ISO e altri

13

Gibson, R. G. "Structural studies in a Proterozoic gneiss complex and adjacent cover rocks, west Needle Mountains, Colorado." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/76096.

Testo completo

Abstract (sommario):

Proterozoic rocks in the Needle Mountains include ca. 1750 Ma amphibolite-grade, metavolcanic and metaplutonic gneisses and ca. 1690 Ma granitoids that comprise the basement to the siliciclastic Uncompahgre Group. The mafic and felsic gneisses underwent synkinematic metamorphism and two phases of isoclinal folding and foliation development during D<sub>B</sub>, prior to emplacement of the ca. 1690 Ma plutons. D<sub>BC</sub> deformation caused folding of D<sub>B</sub> fabrics in the gneisses, development of a subvertical, east-striking foliation in the granitoids, and generation of a macroscopi

Gli stili APA, Harvard, Vancouver, ISO e altri

14

Hill, Robert E. (Robert Einar). "Stratigraphy and sedimentology of the Middle Proterozoic Waterton and Altyn Formations, Belt-Purcell Supergroup, southwest Alberta." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63330.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

15

Moodley, Jason Anthony. "Petrogenesis of the Bysteek and Koenap Formation Migmatites, Central Namaqualand." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1001574.

Testo completo

Abstract (sommario):

The Mesoproterozoic rocks of the Bysteek and Koenap Formations of the Arribees Group are exposed within a NW-SE striking antiformal structure comprised of mafic granulites and metapelitic diatexites, and a number of marble and calc-silicate rock layers. The mafic granulites of the Bysteek Formation show a typological variety of anatectic features, including nebulitic, stromatitic mesosomes, melanosomes, quartz syenitic leucocratic vein networks and syenitic pools. Melanosomes consist of hedenbergitic to diopside-rich clinopyroxene (XMg: 0.40), anorthitic plagioclase (An90), with some quartz, m

Gli stili APA, Harvard, Vancouver, ISO e altri

16

Sun, Weihua, and 孙卫华. "The neoproterozoic Yanbian group and associated plutons in the westernYangtze block, SW China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B41897158.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

17

Johnson, Shannon D. "Structural geology of the Usakos Dome in the Damara Belt, Namibia." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50457.

Testo completo

Abstract (sommario):

Thesis (MSc)--Stellenbosch University, 2005.<br>ENGLISH ABSTRACT: The northeast-trending south Central Zone (sCZ) of the Pan-African Damara belt in central Namibia is structurally characterized by kilometer-scale, northeast-trending dome structures developed in Neoproterozoic rocks of the Damara Sequence. A number of different structural models have been proposed for the formation of these domes in the literature. This study describes the structural geology of the Usakos dome. The study discusses the structural evolution of the dome within the regional framework of the cSZ that represen

Gli stili APA, Harvard, Vancouver, ISO e altri

18

Teitz, Martin W. "Late proterozoic Yellowhead and Astoria Carbonate Platforms, southwest of Jasper, Alberta." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63371.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

19

Simpson, Edward L. "Sedimentology and tectonic implications of the Late Proterozoic to Early Cambrian Chilhowee Group in southern and central Virginia." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/53660.

Testo completo

Abstract (sommario):

Few detailed facies analyses of rift to passive-margin transitions have been undertaken in exhumed orogenic belts. In the central Appalachians, the Chilhowee Group records such an evolution. The Unicoi and basal Hampton Formations record the transition from rifting to opening of the Iapetus Ocean. The majority of the Hampton Formation and the overlying Erwin Formation represent an overall regressive sequence punctuated by five progradational packages that accumulated along a passive margin. The rift to passive·margin phases of sedimentation in the central Appalachians reflect a continuum from

Gli stili APA, Harvard, Vancouver, ISO e altri

20

Allen, Rosemary. "Relationship of thermal evolution to tectonic processes in a proterozoic fold belt : Halls Creek Mobile Zone, East Kimberley, West Australia /." Title page, contents and introduction only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09pha4288.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

21

Vallini, Daniela Alessandra. "The formation of authigenic xenotime in Proterozoic sedimentary basins : petrography, age and geochemistry." University of Western Australia. Geology and Geophysics Discipline Group, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0070.

Testo completo

Abstract (sommario):

[Truncated abstract] The realization in 1999 that the authigenic phosphate, xenotime, could be used in geochronological studies to place age constraints on burial events that affected sedimentary basins has opened numerous opportunities for establishing timeframes for sedimentary basin analysis. Since then, the mineral has been used to place new and novel age constraints on diagenesis, metamorphism, and hydrothermal alteration and mineralization events. Whilst these studies were successful, they identified many complexities in xenotime growth and were restricted to specific areas or single bas

Gli stili APA, Harvard, Vancouver, ISO e altri

22

He, Yanhong, and 何艷紅. "Ages and geochemistry of the Xiong'er volcanic rocks along the southern margin of the North China Craton: implications for the outgrowths of the paleo-mesoproterozoicsupercontinent Columbia (Nuna)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B4163424X.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

23

Zhao, Jian-xin. "The geology, geochemistry and geochronology of the Atnarpa Igneous Complex, SE Arunta Inlier, northern Australia : implications for early to middle proterozoic tectonism and crustal evolution." Title page, contents and abstract only, 1989. http://web4.library.adelaide.edu.au/theses/09SM/09smz63.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

24

Greentree, Matthew Richard. "Tectonostratigraphic analysis of the Proterozoic Kangdian iron oxide - copper province, South-West China." University of Western Australia. Tectonics Special Research Centre, 2007. http://theses.library.uwa.edu.au/adt-WU2009.0054.

Testo completo

Abstract (sommario):

The Cenozoic Ailaoshan Red River shear zone marks the present day western margin of the South China Block. Along this margin are well preserved late Paleoproterozoic to early Neoproterozoic sedimentary and volcanic successions. This work examines the ages and tectonic environments for the formation of the successions, as well as significance of the regional tectono-magmatic events on the formation of widespread iron oxide-copper deposits. The oldest succession is the Paleoproterozoic Dahongshan Group. A new SHRIMP UPb age of 1675 ± 8 Ma for a tuffaceous schist unit confirms its Paleoproteroz

Gli stili APA, Harvard, Vancouver, ISO e altri

25

Crowley, James L. Carleton University Dissertation Earth Sciences. "U-Pb geochronology in Frenchman Cap dome of the Monashee complex, southern Canadian Cordillera; early Tertiary tectonic overprint of a Proterozoic history." Ottawa, 1997.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

26

Booth, Peter William King. "Pan-African imprint on the early mid-proterozoic Richtersveld and Bushmanland sub-provinces near Eksteenfontein, Namaqualand, Republic of South Africa." Doctoral thesis, University of Cape Town, 1990. http://hdl.handle.net/11427/26232.

Testo completo

Abstract (sommario):

The present investigation examines the relationship between the Proterozoic Richtersveld and Bushmanland Subprovinces in the westernmost part of the Namaqua Province, near Eksteenfontein, Republic of South Africa. There is a controversy about this relationship because isotopic data contrast with field evidence. On a regional scale the Richtersveld Subprovince is separated from the Bushmanland Subprovince by the northward-dipping Groothoek Thrust. North of the thrust the Richtersveld Subprovince is comprised of low grade volcano/ plutonic rocks of the Vioolsdrif Terrane and medium grade volcano

Gli stili APA, Harvard, Vancouver, ISO e altri

27

Bendall, Betina. "Mid-Palaeozoic shear zones in the Strangways Range : a record of intracratonic tectonism in the Arunta Inlier, Central Australia." Title page, contents and introduction only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09phb458.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

28

Polteau, Stéphane. "The early proterozoic Makganyene glacial event in South Africa : its implication in sequence stratigraphy interpretations, paleoenvironmental conditions and iron and manganese ore deposition." Thesis, Rhodes University, 2005. http://hdl.handle.net/10962/d1007612.

Testo completo

Abstract (sommario):

The Makganyene Formation forms the base of the Postmasburg Group in the Transvaal Supergroup in the Griqualand West Basin. It consists of diamictites, sandstones, banded iron-formations (BIFs), shales, siltstones and carbonates. It is generally accepted that the Makganyene Formation rests on an erosive regional unconformity throughout the Northern Cape Province. However this study demonstrates that this stratigraphic relationship is not universal, and conformable contacts have been observed. One of the principal aims of this study is to identify the nature of the Makganyene basal contact throu

Gli stili APA, Harvard, Vancouver, ISO e altri

29

Reid, Peter. "Ediacaran (latest Proterozoic) stratigraphic, isotopic and palaeobiological studies in the Flinders Ranges : stratigraphy, structure and stable isotope analysis of the Billy Springs formation, Mt Freeling Syncline, S.A. ; preservation and palaeobiology of the Ediacara Fauna, Central Flinders Ranges, S.A. /." Title page, contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09SB/09sbr357.pdf.

Testo completo

Abstract (sommario):

Thesis (B. Sc.(Hons.))--University of Adelaide, Dept. of Geology and Geophysics. 1992.<br>One folded map and one folded chart in pocket inside back cover. "National grid references Marree SH-54-5 (1:250,000) Parachilna SH-54-13 (1:250,000)." Includes bibliographical references (p. [2-7]).

Gli stili APA, Harvard, Vancouver, ISO e altri

30

Loveday, David C. "A proposed stratigraphic package for filling a mid-Proterozoic rift basin under the Bellefontaine Outlier area, Ohio, and the consequences of the rift on the formation of the Outlier /." Connect to resource, 2005. http://hdl.handle.net/1811/38972.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

31

Barbeau, David Longfellow Jr. "Application of Growth Strata and Detrital-Zircon Geochronology to Stratigraphic Architecture and Kinematic History." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/244092.

Testo completo

Abstract (sommario):

Growth strata analysis and detrital-zircon geochronology are useful applications of stratigraphy to tectonic problems. Whereas both tools can contribute to kinematic analyses of supracrustal rock bodies, growth strata are also useful for analyzing the influence of tectonics on stratigraphic architecture. This study reports: 1) a conceptual model for growth strata development; 2) stratigraphic and kinematic analyses of growth strata architectures from growth structures in southeastern Utah, the Gulf of Mexico, and northeastern Spain; and 3) the detrital-zircon geochronology of the Salinian bloc

Gli stili APA, Harvard, Vancouver, ISO e altri

32

Muller, Stefan G. "The tectonic evolution and volcanism of the Lower Wyloo Group, Ashburton Province, with timing implications for giant iron-ore deposits of the Hamersley Province, Western Australia." University of Western Australia. School of Earth and Geographical Sciences, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0043.

Testo completo

Abstract (sommario):

[Truncated abstract] Banded iron formations of the ~27702405 Ma Hamersley Province of Western Australia were locally upgraded to high-grade hematite ore during the Early Palaeoproterozoic by a combination of hypogene and supergene processes after the initial rise of atmospheric oxygen. Ore genesis was associated with the stratigraphic break between Lower and Upper Wyloo Groups of the Ashburton Province, and has been variously linked to the Ophthalmian orogeny, late-orogenic extensional collapse, and anorogenic continental extension. Small spot PbPb dating of in situ baddeleyite by SHRIMP (sens

Gli stili APA, Harvard, Vancouver, ISO e altri

33

Berger, Julien. "Les associations de roches basiques - ultrabasiques néoprotérozoïques d'Amalaoulou (Gourma, Mali), du Tassendjanet (Hoggar occidental, Algérie) et cénozoïques du Saghro (Anti-Atlas, Maroc): témoins de l'évolution géodynamique de la ceinture péri-cratonique ouest-africaine." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210499.

Testo completo

Abstract (sommario):

Ce travail retrace l’évolution de la suture panafricaine le long de l’axe Anti-Atlas, Hoggar occidental, Gourma, depuis l’activité tectono-magmatique néoprotérozoïque pré-panafricaine jusqu’à l’activité magmatique anorogénique cénozoïque via l’étude de quatre massifs basiques-ultrabasiques disposés à la périphérie du craton ouest-africain.<p><p>Le massif d’Amalaoulaou (Gourma, Mali) est interprété comme la racine d’un arc intra-océanique ayant enregistré la mise en place de magmas basiques (unité des métagabbros) à un stade immature de l’évolution de l’arc (subduction naissante) vers 800-790 M

Gli stili APA, Harvard, Vancouver, ISO e altri

34

Sener, A. K. "Characteristics, distribution and timing of gold mineralisation in the Pine Creek Orogen, Northern Territory, Australia." University of Western Australia. Centre for Global Metallogeny, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0102.

Testo completo

Abstract (sommario):

Over the last two decades, gold occurrences in the Palaeoproterozoic Pine Creek Orogen (PCO) have been cited as type-examples of high-temperature contact-metamorphic or thermal-aureole deposits associated with granitoid magmatism. Furthermore, spatial relationships between these gold occurrences and the granitoids have led to inclusion of these deposits in the intrusion-related gold deposit group. Research on the characteristics, distribution and timing of these gold deposits tests these classifications and supports an alternative interpretation. The deposits display many similarities to well-

Gli stili APA, Harvard, Vancouver, ISO e altri

35

Zhao, Xinfu, and 赵新福. "Paleoproterozoic crustal evolution and Fe-Cu metallogeny of the western Yangtze Block, SW China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B43572261.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

36

Anderson, Phillip. "THE PROTEROZOIC TECTONIC EVOLUTION OF ARIZONA (PRECAMBRIAN, PLATE TECTONICS, VOLCANIC, STRATIGRAPHY)." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183853.

Testo completo

Abstract (sommario):

Archean tectonics are irreconcilable with modern plate tectonics without clearly understanding Proterozoic tectonic accretionary prosesses. Arizona best displays a convergent margin where Proterozoic accretion to an Archean craton generated a new Proterozoic crust from 1800 to 160 Ma. This 12 year study independently formulated a definitive understanding of Arizona's Proterozoic tectonic evolution with new lithologic, petrologic, geochemical, structural and relative age data, and extensive new mapping. The Northwest Gneiss Belt contains an early Proterozoic arkosic clastic wedge at the Wyoming

Gli stili APA, Harvard, Vancouver, ISO e altri

37

Rafuza, Sipesihle. "Carbonate petrography and geochemistry of BIF of the Transvaal supergroup : evaluating the potential of iron carbonates as proxies for palaeoproterozoic ocean chemistry." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018611.

Testo completo

Abstract (sommario):

The subject of BIF genesis, particularly their environmental conditions and ocean chemistry at the time of deposition and their evolution through time, has been a subject of much contentiousness, generating a wealth of proposed genetic models and constant refinements thereof over the years. The prevailing paradigm within the various schools of thought, is the widespread and generally agreed upon depositional and diagenetic model(s) which advocate for BIF deposition under anoxic marine conditions. According to the prevailing models, the primary depositional environment would have involved a sea

Gli stili APA, Harvard, Vancouver, ISO e altri

38

Land, Jarred. "Genesis of BIF-hosted hematite iron ore deposits in the central part of the Maremane anticline, Northern Cape Province, South Africa." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1020905.

Testo completo

Abstract (sommario):

The Paleoproterozoic Transvaal Supergroup in the Northern Cape Province of South Africa is host to high-grade BIF-hosted hematite iron-ore deposits and is the country’s most important source of iron to date. Previous work has failed to provide a robust and all-inclusive genetic model for such deposits in the Transvaal Supergroup; in particular, the role of hydrothermal processes in ore-genesis has not been adequately clarified. Recent studies by the author have produced evidence for hydrothermal alteration in shales (Olifantshoek Supergroup) stratigraphically overlying the iron-ore intervals;

Gli stili APA, Harvard, Vancouver, ISO e altri

39

Beard, Linda Sue. "Precambrian Geology of the Cottonwood Cliffs Area, Mohave County, Arizona." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/244095.

Testo completo

Abstract (sommario):

A belt of Early Proterozoic rocks crops out in the Cottonwood Cliffs area, northwest Arizona. The belt contains an eastern and a western assemblage separated by the Slate Mountain fault. The western assemblage consists of mafic to felsic metavolcanic rocks, metapelites, and metaconglomerates. The eastern assemblage consists of phyllites, felsic to intermediate metavolcanic rocks, metagraywackes, and metagabbro bodies. The belt is bounded to the east by foliated granodiorite. The Valentine granite intruded the belt on the west and north. Steeply-plunging lineations and fold axes, and northeast-

Gli stili APA, Harvard, Vancouver, ISO e altri

40

Wannäs, Kjell O. "Seismic stratigraphy and tectonic development of the Upper Proterozoic to Lower Palaozoic of the Bothnian Bay, Baltic Sea." Doctoral thesis, Stockholms universitet, Naturvetenskapliga fakulteten, 1989. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-81975.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

41

Von, Veh Mark Wolter. "The stratigraphy and structural evolution of the late Proterozoic Gariep belt in the Sendelingsdrif-Annisfontein area, northwestern Cape Province." Doctoral thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/17695.

Testo completo

Abstract (sommario):

Bibliography: pages 128-143.<br>A geological investigation of the Port Nolloth metasediments in the central external parts of the Gariep Beit has led to a re-interpretation of tbeir lithostratigraphy and Pan-African geotectonic evolution. During the rifting stage of passive continental margin evolution, the basal elastic Stinkfontein Sequence was deposited in an alluvial fan environment. Fluviatile conglomerates and quartz arenites (Lekkersing Formation) interfinger with feldspathic arenites and minor volcanics (Vredefontein Formation), and prograde into marginal marine elastics and carbonates

Gli stili APA, Harvard, Vancouver, ISO e altri

42

Smith, Odin Alonso 1973. "Terminal proterozoic carbonate platform development : stratigraphy and sedimentology of the Kuibis Subgroup (ca. 550-548 Ma), Northern Nama Basin, Namibia." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/36672.

Testo completo

Abstract (sommario):

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1999.<br>Includes bibliographical references (leaves 61-79).<br>A stratigraphic and sedimentologic investigation of the Kuibis Subgroup, northern Nama Basin, was undertaken. An U-Pb zircon age determination on an intercalated volcanic ash directly constrains the age of the subgroup to be on the order of 550-548 Ma. The study involved logging eight sections which were measured and described in detail, spanning the region extending from Driedoornvlagte, located east of the Naukluft mountain

Gli stili APA, Harvard, Vancouver, ISO e altri

43

Scammell, Robert John Carleton University Dissertation Geology. "Stratigraphy, structure and metamorphism of the north flank of the Monashee Complex, southeastern British Columbia; a record of proterozoic extension and phanerozoic crustal thickening." Ottawa, 1986.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

44

Urlwin, Ben. "Carbon isotope stratigraphy of the late Proterozoic Wonoka formation of the Adelaide fold belt : diagenetic assessment and interpretation of isotopic signature and correlations with previously measured isotopic curves /." Title page, abstract and contents only, 1992. http://web4.library.adelaide.edu.au/theses/09SB/09sbu77.pdf.

Testo completo

Abstract (sommario):

Thesis (B. Sc.(Hons.))--University of Adelaide, Dept. of Geology and Geophysics, 1993.<br>On title page : "National Grid reference : Copley 1:250,000 SH54-9 6636." Folded map in back cover pocket. Includes bibliographical references (leaves [50-65]).

Gli stili APA, Harvard, Vancouver, ISO e altri

45

Anderson, Alvin D. "Geology of the Phil Pico Mountain Quadrangle, Daggett County, Utah, and Sweetwater County, Wyoming." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2384.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

46

Mengel, Flemming Cai. "Thermotectonic evolution of the Proterozoic-Archaean boundary in the Saglek area, northern Labrador /." 1987. http://collections.mun.ca/u?/theses,91862.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

47

Hill, Catherine Mary. "Experimental constraints on crustal contamination in Proterozoic anorthosite petrogenesis." Thesis, 2017. http://hdl.handle.net/10539/23584.

Testo completo

Abstract (sommario):

A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science. Johannesburg, 2017.<br>Massif-type anorthosites formed in the Proterozoic Eon are the most voluminous anorthosite occurrences on Earth, reaching tens of thousands of square kilometers in aerial extent. While they formed throughout the Proterozoic, most formed during a 700 Ma period between 1800 and 1100 Ma. The rocks are dominated by plagioclase (typically 70 – 95 volume %) of intermediate composition (An40-65). Olivine, ortho

Gli stili APA, Harvard, Vancouver, ISO e altri

48

Baghiyan-Yazd, Mohammad Hassan. "Palaeoichnology of the terminal Proterozoic-Early Cambrian transition in central Australia : interregional correlation and palaeoecology / Mohammad Hassan Baghiyan-Yazd." Thesis, 1998. http://hdl.handle.net/2440/21668.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

49

Greyling, Lynette Natasha. "The paleoproterozoic carbonate-hosted Pering lead-zinc deposit, South Africa." Thesis, 2012. http://hdl.handle.net/10210/4283.

Testo completo

Abstract (sommario):

M. Sc.<br>The Pering Pb-Zn deposit is hosted in the stromatolitic dolomites of the Campbellrand Subgroup of the Ghaap Group, Transvaal Supergroup. The deposit is situated 20 km northeast of the town Reivilo in the semi-arid region of the Northwest Province, South Africa. It has been classified as a Mississippi Valley type deposit and is, together with the Bushy Park Pb-Zn deposit and F-Pb-Zn deposits near Zeerust, the only known MVT deposit of Paleoproterozoic age. The Pering open cast mine has been operational since 1986, yielding 18 Mt at an average ore grade of 3.6 wt.% Zn and 0.6 wt.% Pb.

Gli stili APA, Harvard, Vancouver, ISO e altri

50

Hoffe, Brian H. "Deep seismic evidence of late middle Proterozoic rifting beneath the Kalahari, Western Botswana /." 1996. http://collections.mun.ca/u?/theses,35598.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!