Log in

Relevant bibliographies by topics / Proterozoicum / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Proterozoicum.

Dissertations / Theses on the topic 'Proterozoicum'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Proterozoicum.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Bállico, Manoela Bettarel. "Arquitetura deposicional, ciclicidade sedimentar e padrões de ventos no proterozoico, Formação Mangabeira, Supergrupo Espinhaço." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/163624.

Full text

Abstract:

Os sistemas eólicos foram abundantes e muito comuns no início da Era Proterozoica Era, depois de 2.2 Ga. No entanto, a maioria das sucessões eólicas dessa idade são intensamente deformadas e fragmentadas, o que implica que até o momento, poucas tentativas foram feitas para aplicar uma abordagem de estratigrafia de sequências, para determinar os mecanismos de construção, acumulação e preservação das sequências eólicas, da mesma forma, não existem trabalhos realizados até o presente momento que utilizem os registros de acumulação eólica e reconstruções paleogeográficas para modelar a circulação

APA, Harvard, Vancouver, ISO, and other styles

2

Oliveira, Antonio Charles da Silva. "Evolução tectônica do Craton Amazonas na região Sudeste do estado do Amazonas: um estudo em múltiplas escalas com base na integração de dados geológico–estruturais e geofísicos." Universidade Federal do Amazonas, 2016. http://tede.ufam.edu.br/handle/tede/5158.

Full text

Abstract:

Submitted by Sáboia Nágila (nagila.saboia01@gmail.com) on 2016-07-29T14:37:42Z No. of bitstreams: 1 Dissertação- Antonio Charles da Silva Oliveira.pdf: 18569379 bytes, checksum: e36fa34d61be9f4678a531c17062a3b9 (MD5)<br>Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-08-26T13:24:57Z (GMT) No. of bitstreams: 1 Dissertação- Antonio Charles da Silva Oliveira.pdf: 18569379 bytes, checksum: e36fa34d61be9f4678a531c17062a3b9 (MD5)<br>Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-0

APA, Harvard, Vancouver, ISO, and other styles

3

Sanchez, Evelyn Aparecida Mecenero. "Micropaleontologia aplicada na interpretação estratigráfica e paleoclimática da transição entre o Grupo Paranoá e o Supergrupo São Francisco (Neoproterozóico, Cabeceiras, GO)." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-06052010-133018/.

Full text

Abstract:

O registro proterozóico da Fazenda Funil, região de Cabeceiras, GO, inclui três unidades sedimentares: carbonatos do topo do Grupo Paranoá, níveis de diamictito da Formação Jequitaí, e um pacote de folhelhos, ritmitos de margas e folhelhos e carbonatos da Formação Sete Lagoas. As três unidades registram ocorrência de sílex microfossilífero, encontrados na forma de lentes no Grupo Paranoá, seixos na Formação Jequitaí e uma camada de aproximadamente 600 m de extensão na Formação Sete Lagoas. A semelhança do sílex nas três unidades levou ao questionamento da estratigrafia da Fazenda Funil e da or

APA, Harvard, Vancouver, ISO, and other styles

4

Appelquist, Karin. "Proterozoic crustal evolution in southcentral Fennoscandia /." Göteborg : Department of Earth Sciences, University of Gotheburg, 2010. http://hdl.handle.net/2077/21530.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Mitchell, Emily Geraldine Harmsworth. "Quantitative approaches to understanding ediacaran ecology." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.664750.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Aspler, Lawrence B. (Lawrence Bernard) Carleton University Dissertation Geology. "Geology of Nonacho Basin (early Proterozoic) N.W.T." Ottawa, 1985.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

7

Doyle, Katherine Audrey. "The chemical evolution of the Proterozoic biosphere." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/22150/.

Full text

Abstract:

The chemical evolution of the Proterozoic biosphere is not a well comprehended topic. Major gaps exist in the redox record which documents the ocean’s transition from a dominantly ferruginous state throughout most of the Proterozoic, to widespread deep ocean oxygenation during the Late Neoproterozoic. Between ~1.85 – 0.54 Ga, significant developments in biological evolution also occurred with the emergence of macroscopic eukaryotes followed by the radiation of metazoans. A strong link between stably oxygenated marine environments and the radiation of increasingly complex organisms is observed

APA, Harvard, Vancouver, ISO, and other styles

8

Blake, Kevin L. "The petrology, geochemistry and association to ore formation of the host rocks of the Kiirunavaara magnetite-apatite deposit, northern Sweden." Thesis, Cardiff University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321483.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Diarra, Pobanou Hughes. "The geology and genesis of the Syama gold deposit, Mali, West Africa." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362528.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Micheletti, Francesca Barbey Pierre. "Il magmatismo acido Neo-Proterozoico - Cambriano in Calabria." [S.l.] : [s.n.], 2005. http://www.scd.uhp-nancy.fr/docnum/SCD_T_2005_0007_MICHELETTI.pdf.

Full text

Abstract:

Thèse doctorat : Sciences e la Terre et de l'Univers : Nancy 1 : 2005. Thèse doctorat : Scienze della Terra : Università degli studi di Bari : 2005.<br>Thèse soutenue en co-tutelle. Titre provenant de l'écran-titre.

APA, Harvard, Vancouver, ISO, and other styles

11

Agić, Heda. "Palaeobiology and diversification of Proterozoic-Cambrian photosynthetic eukaryotes." Doctoral thesis, Uppsala universitet, Paleobiologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-265229.

Full text

Abstract:

One of the most important events in the history of life is the evolution of the complex, eukaryotic cell. The eukaryotes are complex organisms with membrane-bound intracellular structures, and they include a variety of both single-celled and multicellular organisms: plants, animals, fungi and various protists. The evolutionary origin of this group may be studied by direct evidence of past life: fossils. The oldest traces of eukaryotes have appeared by 2.4 billion years ago (Ga), and have additionally diversified in the period around 1.8 Ga. The Mesoproterozoic Era (1.6-1 Ga) is characterised b

APA, Harvard, Vancouver, ISO, and other styles

12

Glendinning, Neil Robert William. "Sedimentology of Proterozoic, Moine rocks of west Scotland." Thesis, Royal Holloway, University of London, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246211.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Moore, Kelsey Reed. "Cyanobacterial evolution and interactions with the Proterozoic world." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127144.

Full text

Abstract:

Thesis: Ph. D., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, May, 2020<br>Cataloged from the official PDF of thesis.<br>Includes bibliographical references.<br>Our understanding of the biosphere prior to the rise of complex life is built largely upon microbial mat structures and some exceptionally well-preserved microbial fossils from the Proterozoic (2500 to 540 million years ago). Some of these exceptional fossils are identifiable as cyanobacteria that were preserved by pyrite, amorphous silica (SiO₂) and other minerals. Although a record e

APA, Harvard, Vancouver, ISO, and other styles

14

Phillips, Johnnie O. "Petrology of the Late Proterozoic(?) - Early Cambrian Arumbera Sandstone and the Late Proterozoic Quandong Conglomerate, East-central Amadeus Basin, Central Australia." DigitalCommons@USU, 1986. https://digitalcommons.usu.edu/etd/6684.

Full text

Abstract:

Throughout the James Ranges and Gardiner Range the Arumbera Sandstone forms prominent strike ridges with distinctive dark reddish slopes and pale red to orange-white cliffs. Because of their lithologic and stratigraphic similarities, the names Eninta and ''Quandong" for these units should be suppressed in favor of the name of Arumbera Sandstone, which has precedence. The stratigraphic and lithologic differences observed between the Quandong Conglomerate in the type locality and the Arumbera Sandstone in the study area suggest that these units are not equivalent. Similarites with the Areyonga F

APA, Harvard, Vancouver, ISO, and other styles

15

De, Waele Bert. "The Proterozoic geological history of the Irumide belt, Zambia." Curtin University of Technology, Department of Applied Geology, 2004. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=15789.

Full text

Abstract:

The Irumide belt is an elongate crustal province characterised by Mesoproterozoic tectonism and magmatism that stretches over a distance of approximately 900 kilometers from central Zambia to the Zambia-Tanzania border and northern Malawi. It is bounded to the northwest by largely undeformed Palaeoproterozoic basement lithologies of the Bangweulu block and is truncated to the northeast by Mesoproterozoic and Neoproterozoic transcurrent shear zones within reactivated parts of the Palaeoproterozoic Ubendian belt. To the southeast and south, Irumide lithologies were reworked within the Neoprotero

APA, Harvard, Vancouver, ISO, and other styles

16

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

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

17

Rooney, Alan. "Re-Os geochronology and geochemistry of Proterozoic sedimentary successions." Thesis, Durham University, 2011. http://etheses.dur.ac.uk/621/.

Full text

Abstract:

The Re-Os organic-rich sedimentary rocks (ORS) geochronometer has the potential to provide precise depositional ages and vital information on the Os isotope composition of palaeo-seawater. This thesis presents new geochronology data from Proterozoic sedimentary successions and insights into Re-Os systematics of organic-rich sedimentary rocks and petroleum products such as bitumen and oil. New Re-Os ORS geochronology from two drill cores indicate that the Proterozoic Atar Group of the Taoudeni basin, Mauritania is ~200 Ma older than previous estimates (1107 ± 12 Ma, 1109 ± 22 Ma and 1105 ± 37 M

APA, Harvard, Vancouver, ISO, and other styles

18

Bullen, Dean S. "The petrology of proterozoic mafic sills in southern Africa." Thesis, University of Portsmouth, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444345.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Gall, Quentin Carleton University Dissertation Earth Sciences. "Proterozoic paleoweathering and diagenesis, Thelon Basin, Northwest Territories, Canada." Ottawa, 1994.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

20

Dong, Lin. "Contributions to the Proterozoic and Cambrian Evolution of Eukaryotes." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/26626.

Full text

Abstract:

This thesis makes several contributions to improve our understanding of Proterozoic-Cambrian evolution of eukaryote life. Chapter 1 provides, for the first time, a quantitative characterization of the evolutionary trends of Proterozoic macroalgae. The analysis reveals that morphological disparity of Paleoproterozoic macroalgae was low but increased in the Mesoproterozoic and Ediacaran, with a plateau in between. There was also a significant increase in thallus surface/volume ratio and maximum canopy height of the Ediacaran macroalgal communities. The prolonged plateau between the Mesoproterozo

APA, Harvard, Vancouver, ISO, and other styles

21

Frauenstein, Frank. "Geochemie der Karbonate am Übergang vom Archaikum zum Proterozoikum: Pretoria-Postmasburg Group, Südafrika." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975023241.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Agić, Heda. "Microfossils of eukaryotic cysts through time : A study of Precambrian-Ordovician organic-walled microbiota." Licentiate thesis, Uppsala universitet, Paleobiologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-220439.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Johnson, Yvonne Audrey. "Nature and origin of Lewisian amphibolites of the Loch Maree group." Thesis, Keele University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253264.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Iwanuch, Woldemar. "Geologia dos complexos alcalinos proterozoicos do centro do estado de Tocantins." Universidade de São Paulo, 1991. http://www.teses.usp.br/teses/disponiveis/44/44131/tde-22012015-150224/.

Full text

Abstract:

Os complexos alcalinos de Estrela e Eldorado localizam-se na parte central do Estado do Tocantins; o primeiro, em partes dos municípios de Porto Nacional e Paraíso do Tocantins e o segundo, no município de Barrolândia. O Complexo Alcalino de EstreIa é constituído por uma série de corpos tabulares, alongados e mais ou menos paralelos, orientados no sentido NNE-SSW, que exibem mergulhos moderados a subverticais voltados para SE, com espessura inferior a 300 metros. Esse complexo estende-se por mais de 21 km e é afetad o por vários sistemas de falhas; o mais importante destes sistemas tem direção

APA, Harvard, Vancouver, ISO, and other styles

25

Magyarosi, Zsuzsanna. "Metamorphism of the Proterozoic rocks associated with the Sudbury Structure." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0007/MQ32431.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Teasdale, Jonathan. "Proterozoic tectonic models with application to the Mount Painter inlier /." Title page and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09SB/09sbt253.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Scrimgeour, Ian. "Early Proterozoic metamorphism at the Granites gold mine, Northern Territory /." Adelaide, 1989. http://web4.library.adelaide.edu.au/theses/09SB/09sbs434.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Gruen, Danielle S. "Biogeochemical and phylogenetic signals of Proterozoic and Phanerozoic microbial metabolisms." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119991.

Full text

Abstract:

Thesis: Ph. D., Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 213-240).<br>Life is ubiquitous in the environment and an important mediator of Earth's carbon cycle, but quantifying the contribution of microbial biomass and its metabolic fluxes is difficult, especially in spatially and temporally-remote environments. Microbes leave behind an often scarc

APA, Harvard, Vancouver, ISO, and other styles

29

Hall, Susan Margaret. "Geochemistry of Proterozoic carbonates, Belt Supergroup, Montana and Idaho, U.S.A." Thesis, University of Ottawa (Canada), 1990. http://hdl.handle.net/10393/5827.

Full text

Abstract:

An increase in the degree of post-depositional alteration of Belt limestones is reflected in a diminution of Sr and Mg content, increase in Mn and by depletion in $\sp $C and $\sp $O. $\delta\sb1\sp8$O of limestones ranges from +13.4 to +22.9$\perthous$ SMOW and $\delta\sp $C from $-$5.6 to +2.4$\perthous$ PDB. Two diagenetic trends can be resolved for the limestones. One, affecting the presumed originally aragonite-rich sediments, comprises the Newland, Libby and perhaps the Snowslip Formations. The other trend is confined to the Middle Belt Carbonate and may have been controlled by high-Mg c

APA, Harvard, Vancouver, ISO, and other styles

30

Hemmingsson, Christoffer. "Phosphate and Arsenic Cycling under Experimental Early Proterozoic Marine Conditions." Licentiate thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148800.

Full text

Abstract:

Nutrient dynamics in the Archean-Paleoproterozoic oceans strongly influenced primary productivity and the rise of atmospheric O2. Reconstructing the cycling of key nutrients such as dissolved inorganic phosphate (DIP) at this time is important for our understanding of the timing, rate and extent of atmospheric oxygenation at this time. Banded iron formations (BIF) can be used as proxies for global DIP content in Precambrian marine waters. Estimating Precambrian DIP requires understanding of the mechanisms by which Fe(III)(oxyhydr)oxides scavenge DIP which has come mainly from experimental stud

APA, Harvard, Vancouver, ISO, and other styles

31

Fitzsimons, Ian Christopher William. "The metamorphic histories of some proterozoic granulites from East Antarctica." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/14863.

Full text

Abstract:

The Proterozoic Complex of East Antarctica is an extensive metamorphic terrain, which comprises various outcrop areas preserving granulite-facies mineral assemblages ascribed to a 1000 Ma metamorphic event. This study has focused on two areas of this terrain: the Brattstrand Bluffs coastline of Prydz Bay, Princess Elizabeth Land, and the Nemesis Glacier region in the northern Prince Charles Mountains of Mac. Robertson Land. Both areas are composed of granulite-facies gneisses and migmatites of igneous and sedimentary origin, with a complex history of deformation, anatexis and intrusion at high

APA, Harvard, Vancouver, ISO, and other styles

32

Cadman, Andrew Christopher. "The petrogenesis and emplacement of Proterozoic dyke swarms in Labrador." Thesis, University of Leicester, 1992. http://hdl.handle.net/2381/34998.

Full text

Abstract:

The Archaean Hopedale Block, in the southern Nain Province of Labrador, Canada, is host to three generations of mafic intrusions of Proterozoic age; the 2.2 Ga Kikkertavak, the 1.6 Ga Kokkorvik and the 1.3 Ga Harp dyke swarms. Also present are two ultrabasic dyke types: firstly pyroxenites interpreted as coeval with the Kikkertavak swarm, and secondly 'high titanium dykes' with opaque-rich compositions of uncertain age. Many Kikkertavak (and Harp) intrusions show highly differentiated phyric textures attributed to rhythmic changes in flow conditions during solidification. Modelling of intradyk

APA, Harvard, Vancouver, ISO, and other styles

33

Savage, Derek Allan. "Terminal proterozoic stromatolite reefs with shelly fossils, Salient Platform, British Columbia." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81434.

Full text

Abstract:

The late Neoproterozoic Salient Platform (Byng Formation, upper Miette Group), located 50 km northwest of Jasper, Alberta, contains one of three known occurrences worldwide of the Cloudina-Namacalathus fossil assemblage.<br>The Salient Platform initiated in relatively deep water (minimum 30-50 m) on Mount Machray. Lowermost carbonates on Salient Mountain and The Colonel were deposited in quiet environments behind the developing stromatolitic reef. The upper two thirds of the platform formed in shallow water and consists of huge, elongated Platella and Cryptozoon bioherms, within which m

APA, Harvard, Vancouver, ISO, and other styles

34

Johnston, David T. "Sulfur isotope fractionations in biological systems insight into the Proterozoic biosphere /." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/6714.

Full text

Abstract:

Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Geology. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

APA, Harvard, Vancouver, ISO, and other styles

35

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

37

Roberts, Nicholas Michael William. "From crystal to crust : the Proterozoic crustal evolution of southwest Norway." Thesis, University of Leicester, 2010. http://hdl.handle.net/2381/8954.

Full text

Abstract:

The geology of the Suldal Sector, southwest Norway, comprises exposures from three orogenic periods; the Telemarkian, Sveconorwegian and Caledonian. Telemarkian (~1500 Ma) basement rocks are interpreted to be the oldest crust in the region; these are intruded by Sveconorwegian granitoid intrusions (~1070-930 Ma). Crystalline nappe units overlie the Mesoproterozoic basement, and from reconnaissance U-Pb dating and zircon hafnium isotopes, are believed to comprise slices of the Mesoproterozoic Norwegian continental margin. The Telemarkian basement comprises meta-plutonic/volcanic lithologies tha

APA, Harvard, Vancouver, ISO, and other styles

38

Bjänndal, Erik. "Geophysical investigation of the Arvidsjaur volcanics and the Archean-Proterozoic boundary." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-72632.

Full text

Abstract:

In this work the magnetic and magnetotelluric (MT) geophysical methods have been used to produce two 3D models for the Laver area in southern Norrbotten. A new discovery of a porphyry copper deposit located at the Lill-Laverberget was reported by Boliden in 2012. The goal with the models is to form a better understanding of the setting for the porphyry deposit and to see if any of the geophysical methods are suited to be used in exploration for it. For starters an edge detector (Beiki, 2010) was used on magnetic data to identify structures and petrological contacts in the area. The magnetic da

APA, Harvard, Vancouver, ISO, and other styles

39

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Boyce, Alistair. "The Proterozoic building of North America : insights from broadband seismic tomography." Thesis, Imperial College London, 2018. http://hdl.handle.net/10044/1/62331.

Full text

Abstract:

Cratons, the Archean (≥ 2.5 Ga) cores of the continents are the longest-lived features of Earth’s surface. They are underlain by cold, iron-depleted, thick (>250 km), seismically fast lithospheric mantle roots or keels that have survived thermal and chemical erosion over multiple Wilson cycles. Recently however, numerous studies have shown that cratonic mantle lithosphere can undergo modification andmay be removed entirely. I use passive-source seismology to investigate this further for the Superior Craton of North America and its abutting Proterozoic platform. Initially, I use P- and S-wave r

APA, Harvard, Vancouver, ISO, and other styles

41

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

42

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

44

Barão, Leonardo Mairink. "Arcabouço estratigráfico : estrutural da bacia do Guaratubinha e deformações associadas, sudeste do Estado do Paraná." reponame:Repositório Institucional da UFPR, 2016. http://hdl.handle.net/1884/44275.

Full text

Abstract:

Orientadora : Profª. Drª. Barbara Trzaskos<br>Coorientador : Dr. Luis Gustavo de Castro<br>Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências da Terra, Programa de Pós-Graduação em Geologia. Defesa: Curitiba, 28/07/2016<br>Inclui referências : f. 125-134<br>Área de concentração: Geologia exploratoria<br>Resumo: A Bacia do Guaratubinha possui história evolutiva complexa marcada por diferentes eventos deformacionais, associados à sedimentação, vulcanismo e tectonismo. É situada no estado do Paraná a cerca de 35km da cidade de Curitiba. É classificada como uma das bacias d

APA, Harvard, Vancouver, ISO, and other styles

45

Smith, Peter B. "The alteration history of late Proterozoic Wooltana volcanics, Mount Painter Province, S.A. /." Adelaide, 1992. http://web4.library.adelaide.edu.au/theses/09SB/09sbs656.pdf.

Full text

Abstract:

Thesis (B. Sc.(Hons.))--University of Adelaide, Dept. of Geology, 1992.<br>National grid reference SH54 - 6737-2. One coloured folded map in pocket inside back pocket. Includes bibliographical references.

APA, Harvard, Vancouver, ISO, and other styles

46

Callow, Richard H. T. "The co-evolution of biology anf taphonomy across the proterozoic-cambrian transition." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504316.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Ciborowski, Thomas. "The geochemistry and petrogenesis of the early Proterozoic Matachewan Large Igneous Province." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/51146/.

Full text

Abstract:

The Matachewan Large Igneous Province (LIP) is interpreted to have formed during mantle plume-induced continental break-up during the early Proterozoic. When the Matachewan LIP is reconstructed to its original configuration, the dyke swarms,layered intrusions and flood basalt provinces emplaced over the lifetime of the province comprise one of the largest magmatic provinces recognised in the geological record. New geochemical data allow, for the first time, the Matachewan LIP to be treated as a single, coherent entity. The major and trace element data presented here show that Matachewan LIP su

APA, Harvard, Vancouver, ISO, and other styles

48

Brewer, T. S. "Geochemistry, geochronology and tectonic setting of the proterozoic Telemark supracrustals, Southern Norway." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303806.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Kamber, Balz Samuel. "Contrasting Proterozoic and Archean tectonic styles in the Limpopo Belt, Southern Africa /." [S.l.] : [s.n.], 1995. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Kah, Linda Christine. "Early proterozoic (1.9 Ga) thrombolites of the Rocknest formation, Northwest Territories, Canada." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/59603.

Full text

Abstract:

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1990.<br>Includes bibliographic references (leaves 23-27).<br>by Linda Christine Kah.<br>M.S.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!