Academic literature on the topic 'Gawler Ranges Volcanics'
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Journal articles on the topic "Gawler Ranges Volcanics"
Pankhurst, M. J., B. F. Schaefer, P. G. Betts, N. Phillips, and M. Hand. "A mesoproterozoic continental flood rhyolite province, the Gawler Ranges, Australia: the end member example of the Large Igneous Province clan." Solid Earth Discussions 2, no. 2 (September 9, 2010): 251–74. http://dx.doi.org/10.5194/sed-2-251-2010.
Full textPankhurst, M. J., B. F. Schaefer, P. G. Betts, N. Phillips, and M. Hand. "A Mesoproterozoic continental flood rhyolite province, the Gawler Ranges, Australia: the end member example of the Large Igneous Province clan." Solid Earth 2, no. 1 (March 31, 2011): 25–33. http://dx.doi.org/10.5194/se-2-25-2011.
Full textCampbell, E. M., and C. R. Twidale. "The gawler ranges, South Australia: an unusual volcanic massif." Australian Geographer 22, no. 1 (May 1991): 24–33. http://dx.doi.org/10.1080/00049189108703018.
Full textGILES, C. "Petrogenesis of the Proterozoic Gawler Range Volcanics, South Australia." Precambrian Research 40-41 (October 1988): 407–27. http://dx.doi.org/10.1016/0301-9268(88)90078-2.
Full textAllen, S. R., C. J. Simpson, J. McPhie, and S. J. Daly. "Stratigraphy, distribution and geochemistry of widespread felsic volcanic units in the Mesoproterozoic Gawler Range Volcanics, South Australia*." Australian Journal of Earth Sciences 50, no. 1 (February 2003): 97–112. http://dx.doi.org/10.1046/j.1440-0952.2003.00980.x.
Full textFraser, G. L., R. G. Skirrow, and A. R. Budd. "Geochronology of Mesoproterozoic gold mineralization in the Gawler Craton, and temporal links with the Gawler Range Volcanics." Geochimica et Cosmochimica Acta 70, no. 18 (August 2006): A185. http://dx.doi.org/10.1016/j.gca.2006.06.371.
Full textMorrow, Nicole, and Jocelyn McPhie. "Mingled silicic lavas in the Mesoproterozoic Gawler Range Volcanics, South Australia." Journal of Volcanology and Geothermal Research 96, no. 1-2 (February 2000): 1–13. http://dx.doi.org/10.1016/s0377-0273(99)00143-2.
Full textCampbell, E. M., and C. R. Twidale. "The evolution of bornhardts in silicic volcanic rocks in the gawler ranges." Australian Journal of Earth Sciences 38, no. 1 (February 1991): 79–93. http://dx.doi.org/10.1080/08120099108727957.
Full textRajagopalan, Shanti, Shi Zhiqun, and Robert Major. "Geophysical Investigations of Volcanic Terrains: A Case History from the Gawler Range Volcanic Province, South Australia." Exploration Geophysics 24, no. 3-4 (September 1993): 769–78. http://dx.doi.org/10.1071/eg993769.
Full textPeucat, J. J., R. Capdevila, C. M. Fanning, R. P. Ménot, L. Pécora, and L. Testut. "1.60 Ga felsic volcanic blocks in the moraines of the Terre Adélie Craton, Antarctica: Comparisons with the Gawler Range Volcanics, South Australia." Australian Journal of Earth Sciences 49, no. 5 (October 2002): 831–45. http://dx.doi.org/10.1046/j.1440-0952.2002.00956.x.
Full textDissertations / Theses on the topic "Gawler Ranges Volcanics"
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.
Full textRoss, A. "Physical volcanology and geochemistry of the lower Gawler Range Volcanics in the southern Gawler Ranges." Thesis, 2015. http://hdl.handle.net/2440/118236.
Full textThe Gawler Range Volcanics are a Silicic Large Igneous Province that has been extensively studied due to the atypical nature of its widespread felsic lava flows. These low viscosity lavas form the upper sequence of the GRV, termed the Upper Gawler Range Volcanics (UGRV). The older sequence or Lower Gawler Range Volcanics (LGRV) are readily distinguished from the UGRV as they appear as numerous discrete volcanic centres, the best exposed of which are at Kokatha and Lake Everard. A much less discussed volcanic area of the LGRV are the Southern Gawler Ranges Area Volcanics (SGRAV), which form a curvilinear belt along the southern margin of the GRV. The SGRAV are dominantly represented by two volcanic units, the Bittali Rhyolite (BR) and Waganny Dacite (WD) which are exposed discontinuously for ~200km E-W. The SGRAV may be divided into a western section of dominantly effusive volcanism, with elevated temperatures and halogen contents comparable to that of the UGRV, and a central-eastern section where explosive volcanism predominates. Petrogenetic modelling suggests that assimilation fractional crystallization (AFC) processes which played a role in the development of the LGRV, were active in the formation of the SGRAV. However, using AFC modelling, the SGRAV can be reconstructed through a dominant fractional crystallization process with late stage crustal assimilation, as opposed to continual crustal assimilation in the other LGRV magma systems.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2015
Robertson, B. D. "The geology, petrology and geochemistry of the volcanics in the Kokatha Region, Gawler Ranges, South Australia." Thesis, 1989. http://hdl.handle.net/2440/128628.
Full textVolcanics in the Kokatha region present a wider range of rock types than in other areas of the Gawler Ranges. High temperature Mg rich basalt flows through to rhyolite ignimbrites and air fall tuffs outcrop. Two magmatic cycles are observed with a cycle consisting of initial basalts, followed by voluminous dacites and rhyodacites. The final phase of the cycle following the rhydacites represents a period of more explosive activity resulting in the deposition of rhyolitic ignimbrites, air fall tuffs rhyolitic flows and pyroclastics. Geochemical data indicate both fractionation and mixing of fractionated components were active igneous processes resulting in the formation of layered magma chambers. The layering of the magma chambers being well illustrated in the stratigraphy of the volcanic pile. Further evidence for cyclic fractionation trends exists, with a relative depletion of incompatible elements in the second cycle when compared to the first cycle. Discrimination diagrams plot the rocks from Kokatha in the calc-alkaline field. Calc-alkaline series usually indicate subduction processes however volcanism at Kokatha is intracratonic. Rb-Sr data give an isochron age of 1588.4 ± 14 Ma suggesting the rocks from Kokatha are a part of the lower sequence of the Gawler Range Volcanics. Samples from both cycles produce the isochron indicating a melt from a homogeneous source. Neodymium data suggest a basaltic input from the mantle assimilating with lower crust is a likely source. A possible tectonic model for volcanism is presented. Initially a flux of mantle-derived basalt enters the lower crust. This provides heat for large scale melting. Assimilation of lower crustal melts and mantle-derived basalts may or may not occur however a homogeneous source is formed. Diapirism resulting in upper crustal magma chambers allows the formation of a layered magma chamber. Eruption of the magma results in the stratigraphic sequence of volcanic rock units.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1989
Tregeagle, J.-S. "Petrogenesis and magma chamber evolution of the Gawler Range Volcanics." Thesis, 2014. http://hdl.handle.net/2440/110564.
Full textThe Gawler Range Volcanics (GRV) have been extensively studied previously, but a source and emplacement mechanism has yet to be agreed upon. This study aims to constrain the source region of the GRV and to make deductions about how the GRV evolved. This has been done through a number of modelling techniques, including AFC modelling and use of the Rhyolite-MELTs program. The εNd values vary widely across the GRV, and these have been used in conjunction with trace element geochemistry to constrain the source region. It is deduced that the most primitive GRV basalts were the result of limited fractionation of a re-enriched refractory harzburgite source in the sub-continental lithospheric mantle. It is then shown that the entire GRV suite can be derived from one fractionation trend, however some assimilation is required.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2014
Stewart, Kathryn. "High temperature felsic volcanism and the role of mantle magmas in proterozoic crustal growth : the Gawler Range volcanic province / by Kathryn P. Stewart." Thesis, 1992. http://hdl.handle.net/2440/21477.
Full textIncludes bibliographical references.
iv, 214, [46] leaves, [10] leaves of plates : ill. (some col.), col. maps ; 30 cm.
Thesis (Ph.D.)--University of Adelaide, Dept. of Geology and Geophysics, 1994
Hill, J. "Geochemical evolution and alteration styles within the Gawler Range Volcanics, South Australia." Thesis, 2019. https://hdl.handle.net/2440/136960.
Full textThe Gawler Range Volcanics (GRV) form part of a Mesoproterozoic Silicic Large Igneous Province (Gawler SLIP) within South Australia. The SLIP includes intrusive and extrusive rocks within the Gawler Craton and Curnamona Province that are dominantly felsic. Recent high precision dating of several GRV units has shown that they erupted between 1587 Ma and 1595 Ma allowing for geochemical comparisons with respect to a precise timeline. Trace element geochemistry has shown anomalies to be consistent through the lower and upper GRV demonstrating the main source in the GRV likely did not change. A mafic component is shown to have contributed to both the lower and upper GRV system. Eu anomalies and trace element geochemistry shows that there was a large change in magmatic evolution between the upper and lower GRV within a short time (<1 m.yr). This change is hypothesised to have occurred due to the tectonic regime during the SLIP emplacement. Hydrothermal alteration associated with the emplacement of the Gawler SLIP is known to have contributed to the formation of Iron-Oxide Copper-Gold (IOCG) and shear-hosted deposits in South Australia. More recent discoveries within the Southern Gawler Ranges display epithermal-porphyry characteristics associated with alteration in the lower GRV. Alteration within the GRV is hereby characterised in order to identify alteration associated with mineralisation. Alteration is shown to encompass a sericite – hematite dominated assemblage which has affected most of the GRV. Several other anomalous alteration assemblages exist in localised areas. Using direct evidence, it is suggested that epithermal-porphyry systems may be preserved within the upper GRV, which encompasses a larger outcrop area than the lower GRV which is underexplored.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2019
Budd, Anthony. "The Tarcoola Goldfield of the Central Gawler Gold Province, and the Hiltaba Association Granites, Gawler Craton, South Australia." Phd thesis, 2006. http://hdl.handle.net/1885/12890.
Full textJagodzinski, E. "The geology of the Gawler Range Volcanics in the Toondulya Bluff area and U-Pb dating of the Yardea Dacite at Lake Acraman." Thesis, 1985. http://hdl.handle.net/2440/86564.
Full textAt Toondulya Bluff a sequence of 'older' Gawler Range Volcanics dip in an easterly direction beneath the overlying Yardea Dacite, and are intruded by the comagmatic Hiltaba Granite. The volcanics occur as a series of tuffs and lava flows. Geochemical evidence suggests these volcanics are related to each other by fractional crystallisation, with plagioclase, clinopyroxene, K-feldspar and titan-magnetite, and accessory zircon and apatite controlling differentiation trends. The Si-rich Hiltaba Granite and Yardea Dacite formed from the final, highly fractionated melts. Geothermometry suggests the volcanic and granite crystallised at temperatures within the range 680deg-850degC. The initial magma from which the lithologies were derived, was formed by partial melting of a lower crustal source probably of granulitic composition. Lake Acraman is believed to have been a site of meteoritic impact in the late Proterozoic (~600 Ma ago). Fragments of dacitic ejecta have been identified within the Bunyeroo Formation, Flinders Ranges and dating of these fragments gives an age of c.1575 Ma using single zircon ion probe dating techniques (Gostin et al in prep.). U/Pb dating of the Yardea Dacite at Lake Acraman reveals it to be of comparable age to these fragments (1603-1631 Ma). The lower intercept of the discordia line reveals there has been no resetting of the U/Pb system in response to the postulated meteoritic impact.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 1985