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Relevant bibliographies by topics / Folds and igneous intrusives

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Academic literature on the topic 'Folds and igneous intrusives'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Folds and igneous intrusives"

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F.E., Okpikoro, and Olorunniwo M.A. "SEISMIC SEQUENCE ARCHITECTURE AND STRUCTURAL ANALYSIS OF NORTHEASTERN NIGERIA CHAD (BORNU) BASIN." Continental J. Earth Sciences 5, no. 2 (2010): 1–9. https://doi.org/10.5281/zenodo.833395.

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An elucidation of the seismic sequence architecture and assessment of the various structural trapping features common in Northeastern Nigeria Chad Basin were carried out in this study. The Chad Basin has proven petroleum reserves in sectors of other bounding countries and not same in the Nigerian sector of it. The analysis and interpretation of the data set comprising seismic reflection time sections and well logs encompassed seismic stratigraphy, structural and log-sequence stratigraphy. This was aimed at establishing the sequence architecture and trapping mechanisms in relation to the petrol

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Widagdo, Asmoro, Hari Wiki Utama, Gentur Waluyo, Indra Permanajati, Maulana Rizki Aditama, and FX Anjar Trilaksono. "Tectonic control on dyke and sill intrusions of active tectonic margine, case study in Cilacap area, Central Java Indonesia." MATEC Web of Conferences 402 (2024): 03006. http://dx.doi.org/10.1051/matecconf/202440203006.

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Control of geological structures on the presence of dyke and sill intrusions in the Cilacap-Central Java area requires explanation. The research was conducted through a series of fieldwork. Field research is carried out by measuring geological structural elements such as rock layers, joints, faults and folds. Geological and cross-sectional maps provide information on the distribution of igneous rock intrusions in the study area. Fault analysis produces information on the stresses forming the geological structure in the study area. Thus the relationship between the distribution of igneous intru

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Schiøtte, L. "Field occurrence and petrology of deformed metabasite bodies in the Rinkian mobile belt, Umanak district, West Greenland." Rapport Grønlands Geologiske Undersøgelse 141 (December 31, 1988): 1–36. http://dx.doi.org/10.34194/rapggu.v141.8053.

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Tabular, pod-shaped and irregular discordant metabasite bodies intruding the Archaean gneisses in the Umanak district constitute a series of tholeiitic layered intrusions. The magma evolution was controlled by fractional crystallisation of olivine and Cr-spinel in the initial stages, quickly superseded by pyroxenes. Fractional crystallisation of orthopyroxene was of major significance during most of the igneous evolution. Cumulus plagioclase came in relatively late. The metabasite bodies are remarkably well differentiated, and differentiation in a common magma reservoir prior to emplacement is

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Magee, Craig, Christopher A. L. Jackson, Jonathon P. Hardman, and Matthew T. Reeve. "Decoding sill emplacement and forced fold growth in the Exmouth Sub-basin, offshore northwest Australia: Implications for hydrocarbon exploration." Interpretation 5, no. 3 (2017): SK11—SK22. http://dx.doi.org/10.1190/int-2016-0133.1.

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Igneous sills emplaced at shallow levels in sedimentary basins commonly uplift the overburden and free surface. Uplift produces dome-shaped forced folds that may host economic hydrocarbon accumulations. These intrusion-induced forced folds are typically assumed to develop instantaneously, whereby the oldest onlapping strata constrain the age of sill emplacement, and accommodate the entire volume of intruded magma. However, several studies demonstrate that forced folds may grow over geologic timescales, with additional space-making mechanisms (e.g., compaction) partly accommodating the magma vo

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Noblett, Jeffery B. "Geology of the Precambrian Metamorphic Rocks Along South Hardscrabble Creek, Wet Mountains, Colorado." Mountain Geologist 24, no. 3 (1987): 67–76. http://dx.doi.org/10.31582/rmag.mg.24.3.67.

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Proterozoic metamorphic rocks exposed along South Hardscrabble Creakier typical those in the Wet Mountains on the east side of the Ilse fault, lacking the northeast trending, 1-mr (1 6 km) wavelength folds of rocks to the west They are folded isochronally implying that this IS not a stratigraphic succession, but map units can be described and analyzed Three major units were recognized 1) amphibolite, 2) birotate gneiss, and 3) granitic gneiss Manor rock types include metagabbro and sillimanite-bearing quartzite The amphibolite and metagabbro have compositions suggesting that they originated as

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Clariana, Pilar, and Joaquin García-sansegundo. "Variscan structure in the eastern part of the Pallaresa massif, Axial Zone of the Pyrenees (NW Andorra). Tectonic implications." Bulletin de la Société Géologique de France 180, no. 6 (2009): 501–11. http://dx.doi.org/10.2113/gssgfbull.180.6.501.

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Abstract The Variscan structures of the Axial Zone of the Pyrenees are traditionally separated into the “infrastructure” and the “suprastructure” domains. Three deformation events have been recognized within Cambro-Ordovician rocks in the eastern part of the Pallaresa massif. D1 consists of a slaty cleavage (S1), and no folds have been found associated with it. The D2 event is characterized by E-W trending and north-verging recumbent folds with an associated foliation (S2) that can be observed at all scales. The S2 foliation has a horizontal orientation, and is the main foliation in the northe

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ROBINS, BRIAN. "The mode of emplacement of the Honningsvåg Intrusive Suite, Magerøya, northern Norway." Geological Magazine 135, no. 2 (1998): 231–44. http://dx.doi.org/10.1017/s0016756898008395.

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The Honningsvåg Intrusive Suite consists of several layered mafic/ultramafic intrusions and a transgressive body of igneous breccia that appears to represent a magma conduit. It is emplaced into a Silurian, flysch-type sedimentary sequence that is thermally metamorphosed to spotted slate, cordierite–andalusite or pyroxene hornfels and agmatitic migmatite. Folds and flattened reduction spots in the hornfelses suggest that emplacement took place after Caledonian deformation and development of a slaty cleavage. Tectonic rotation subsequent to emplacement has led to exposure of the Honningsvåg Int

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Jackson, Christopher A. L., Craig Magee, and Carl Jacquemyn. "Rift-related magmatism influences petroleum system development in the NE Irish Rockall Basin, offshore Ireland." Petroleum Geoscience 26, no. 4 (2020): 511–24. http://dx.doi.org/10.1144/petgeo2018-020.

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Large volumes of hydrocarbons reside in volcanically influenced sedimentary basins. Despite having a good conceptual understanding of how magmatism impacts the petroleum systems of such basins, we still lack detailed case studies documenting precisely how intrusive magmatism influences, for example, trap development and reservoir quality. Here we combine 3D seismic reflection, borehole, petrographical and palaeothermometric data to document the geology of borehole 5/22-1, NE Irish Rockall Basin, offshore western Ireland. This borehole (Errigal) tested a four-way dip closure that formed to acco

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Luukkonen, Erkki J. "Structural and U–Pb isotopic study of late Archaean migmatitic gneisses of the Presvecokarelides, Lylyvaara, eastern Finland." Transactions of the Royal Society of Edinburgh: Earth Sciences 76, no. 4 (1985): 401–10. http://dx.doi.org/10.1017/s0263593300010634.

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ABSTRACTThe migmatitic gneiss complex of Lylyvaara in the eastern part of Finnish Presvecokarelides of the Baltic Shield shows evidence of a polyphase deformational and metamorphic history and of the emplacement of a number of mafic and felsic igneous intrusions at various stages during this history. Sequential structural development has been established on the bases of refolding and cross-cutting relationships. U–Pb zircon and sphene isotopic data combined with structural studies indicate that the first six deformational phases took place in late Archaean (=Presvecokarelian) times. The sevent

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Chacksfield, B. C., W. De Vos, L. D'Hooge, et al. "A new look at Belgian aeromagnetic and gravity data through image-based display and integrated modelling techniques." Geological Magazine 130, no. 5 (1993): 583–91. http://dx.doi.org/10.1017/s0016756800020884.

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AbstractDigital processing and image-based display techniques have been used to generate contour and shaded-relief maps of Belgian aeromagnetic data at a scale of 1:300000 for the whole of Belgium. These highlight the important anomalies and structural trends, particularly over the Brabant Massif. North and vertically illuminated shaded-relief plots, enhanced structural belts trending west–east to northwest–southeast in the Brabant Massif and west–east to southwest–northeast in the core of the Ardennes. The principal magnetic lineaments have been identified from the shaded-relief plots and ten

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Dissertations / Theses on the topic "Folds and igneous intrusives"

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Fumerton, Stewart Lloyd. "The felsic intrusives In E.R.P.M., Boksburg." Thesis, 2015. http://hdl.handle.net/10539/17282.

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Scogings, Andrew John. "Alkaline intrusives from the Tugela terrane, Natal metamorphic province." Thesis, 1991. http://hdl.handle.net/10413/11162.

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Three gneissose alkaline granitoid intrusives at Ngoye, Bulls Run and Wangu are described. They are located within the Nkomo Nappe of the Tugela Terrane, near the northern margin of the Natal Metamorphic Province. The Ngoye Complex comprises alkaline granites, with minor syenite and monzodiorite phases. According to modal am geochemical criteria the Ngoye granites range from peraluminous (muscovite-bearing), through metaluminous (biotite- and/or hornblende-bearing), to peralkaline (riebeckite-, aegirine- and magnetite-bearing). The granites are A-types according to their modal and geochemical

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Kimpton, B. J. "The geological relationship between Kanmantoo Cu-Au deposit mineralisation, hydrothermal metasomatism and igneous intrusives." Thesis, 2018. http://hdl.handle.net/2440/130628.

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This item is only available electronically.<br>The Kanmantoo Cu-Au deposit has been in episodic operation since 1846, one decade after the capital city of Adelaide was established some 40 kilometres to the NW. Regionally and within the host stratigraphy there exists archetypal evidence of the Cambrian Delamerian Orogeny through a complex structural, metamorphic and intrusive history. Consequently, numerous theories exist within the literature regarding a syngenetic or epigenetic style of mineralisation and the debated contribution, if any, of magmatic hydrothermal fluids. This study has doc

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Books on the topic "Folds and igneous intrusives"

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Genge, Matthew J. Geological Field Sketches and Illustrations. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198835929.001.0001.

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Drawings, illustrations, and field sketches play an important role in Earth Science since they are used to record field observations, develop interpretations, and communicate results in reports and scientific publications. Drawing geology in the field furthermore facilitates observation and maximizes the value of fieldwork. Every geologist, whether a student, academic, professional, or amateur enthusiast, will benefit from the ability to draw geological features accurately. This book describes how and what to draw in geology. Essential drawing techniques, together with practical advice in crea

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Book chapters on the topic "Folds and igneous intrusives"

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Faure, Gunter. "Differentiated Gabbro Intrusives." In Origin of Igneous Rocks. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-662-04474-2_7.

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Rickwood, Peter C. "Igneous intrusives in the Greater Sydney Region." In Engineering Geology of the Sydney Region. Routledge, 2018. http://dx.doi.org/10.1201/9780203757390-13.

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Dirks, P. H. G. M., I. V. Sanislav, M. R. van Ryt, et al. "Chapter 8: The World-Class Gold Deposits in the Geita Greenstone Belt, Northwestern Tanzania." In Geology of the World’s Major Gold Deposits and Provinces. Society of Economic Geologists, 2020. http://dx.doi.org/10.5382/sp.23.08.

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Abstract The Geita mine is operated by AngloGold Ashanti and currently comprises four gold deposits mined as open pits and underground operations in the Geita greenstone belt, Tanzania. The mine produces ~0.5 Moz of gold a year and has produced ~8.3 Moz since 2000, with current resources estimated at ~6.5 Moz, using a lower cut-off of 0.5 g/t. The geologic history of the Geita greenstone belt involved three tectonic stages: (I) early (2820–2700 Ma) extension (D1) and formation of the greenstone sequence in an oceanic plateau environment; (II) shortening of the greenstone sequence (2700–2660 Ma

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Chartrand, Francis. "Geological Setting of Volcanogenic Massive Sulfide Deposits in the Central Pyroclastic Belt, Val D’OR." In Geology and Gold, Rare Element, and Base Metal Mineralization of the Val D'or Area, Quebec. Society of Economic Geologists, 1991. http://dx.doi.org/10.5382/gb.09.11.

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Abstract Most copper-zinc volcanogenic massive sulfide deposits (herein designated by their common acronym, “VMSD”) in the Quebec segment of the Abitibi belt occur in volcanic complexes characterized by tholeiitic to calc-alkaline, mafic and felsic volcanic rocks, associated sediments and related igneous intrusives. These complexes were constructed upon extensive submarine plains composed of tholeiitic to komatiitic, mafic to ultramafic lava and intrusives. The volcanic complexes are generally comprised of multiple cycles which may be bimodal (ex., andesiterhyolite) or continuous (ex., andesit

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Burton, William C., and J. Stephen Schindler. "Proterozoic and Paleozoic evolution of the Blue Ridge geologic province in northern Virginia, USA." In Field Excursions to the Northern Sierra Nevada of California, the Mining Districts of the Sierra Nevada, and Cretaceous and Paleocene Sediments in Maryland, USA. Geological Society of America, 2023. http://dx.doi.org/10.1130/2023.0065(05)abs.

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ABSTRACT This field guide presents a one-day trip across the northern Virginia Blue Ridge geologic province and highlights published geologic mapping of Mesoproterozoic rocks that constitute the core of the Blue Ridge anticlinorium and Neoproterozoic cover-sequence rocks on the fold limbs. The guide presents zircon SHRIMP (sensitive high-resolution ion microprobe) U-Pb crystallization ages of granitoid rocks and discusses the tectonic and petrologic evolution of basement rocks during the Mesoproterozoic. U-Pb data show more of a continuum for Blue Ridge Mesoproterozoic magmatic events, from ca

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Thébaud, Nicolas, Andrew Allibone, Quentin Masurel, et al. "Chapter 34: The Paleoproterozoic (Rhyacian) Gold Deposits of West Africa." In Geology of the World’s Major Gold Deposits and Provinces. Society of Economic Geologists, 2020. http://dx.doi.org/10.5382/sp.23.34.

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Abstract Paleoproterozoic terranes of the Man-Leo Shield in the southern part of the West African craton host one of the world’s largest gold provinces with an overall endowment &gt;10,000 metric tons (t). Although gold deposition commenced by ca. 2170 Ma, most deposits formed later, either during the inversion and metamorphism of intraorogenic sedimentary basins between ca. 2110 and 2095 Ma, or during later transcurrent deformation and associated widespread high K plutonism following docking of Archean and Paleoproterozoic domains within the craton at ca. 2095 Ma. Deposits formed between

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Weil, Arlo Brandon, and Adolph Yonkee. "The Laramide orogeny: Current understanding of the structural style, timing, and spatial distribution of the classic foreland thick-skinned tectonic system." In Laurentia: Turning Points in the Evolution of a Continent. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.1220(33).

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ABSTRACT The Laramide foreland belt comprises a broad region of thick-skinned, contractional deformation characterized by an anastomosing network of basement-cored arches and intervening basins that developed far inboard of the North American Cordilleran plate margin during the Late Cretaceous to Paleogene. Laramide deformation was broadly coincident in space and time with development of a flat-slab segment along part of the Cordilleran margin. This slab flattening was marked by a magmatic gap in the Sierra Nevada and Mojave arc sectors, an eastward jump of limited igneous activity from ca. 80

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Kerr, Steven B. "Geology of the Mercur Gold Mine, Oquirrh Mountains, Utah." In Geology and Ore Deposits of the Oquirrh and Wasatch Mountains, Utah. Society of Economic Geologists, 1998. http://dx.doi.org/10.5382/gb.29.18.

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Abstract Production from the Mercur mine was completed in March of 1997. From September 1982 through March 1997, over 2 million ounces of gold were produced from 22 million tons of ore. Gold production prior to 1982 is estimated to be approximately 1.5 million ounces. The gold deposits of the Mercur mine are situated in the southwest Oquirrh Mountains, approximately 30 miles south of Tooele, Utah. The gold deposits of Mercur lie along the eastern limb of the NNW-trending Ophir anticline. The anticline is one of a series of NNW-trending folds that have an asymmetrical shape due to folding of up

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Conference papers on the topic "Folds and igneous intrusives"

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Mulholland, P., S. Testa, and M. Woodfin. "Tertiary Igneous Intrusives - Establishing Their Presence to Reduce Exploration Risk." In 61st EAGE Conference and Exhibition. European Association of Geoscientists & Engineers, 1999. http://dx.doi.org/10.3997/2214-4609.201407628.

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Kershaw, Charles Thomas, Daniel R. Hummer, and F. Brett Denny. "MINERALOGY OF IGNEOUS INTRUSIVES AT HICK’S DOME AND THEIR ECONOMIC VIABILITY." In 54th Annual GSA North-Central Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020nc-348163.

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Milgate, Marvin L. "Some relationships among folds, faults and mid-Tertiary igneous rocks near Gallup, northwestern New Mexico." In 40th Annual Fall Field Conference. New Mexico Geological Society, 1989. http://dx.doi.org/10.56577/ffc-40.123.

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