Добірка наукової літератури з теми "Calcrete geochemistry"
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Статті в журналах з теми "Calcrete geochemistry"
Kadİr, S., M. Eren, T. Külah, N. Önalgİl, M. Cesur, and A. Gürel. "Genesis of Late Miocene-Pliocene lacustrine palygorskite and calcretes from Kırşehir, central Anatolia, Turkey." Clay Minerals 49, no. 3 (June 2014): 473–94. http://dx.doi.org/10.1180/claymin.2014.049.3.09.
Повний текст джерелаLarrey, Marine, Frédéric Mouthereau, Emmanuel Masini, Damien Huyghe, Eric C. Gaucher, Aurélien Virgone, and Véronique Miegebielle. "Quaternary tectonic and climate changes at the origin of travertine and calcrete in the eastern Betics (Almería region, SE Spain)." Journal of the Geological Society 177, no. 5 (June 2, 2020): 939–54. http://dx.doi.org/10.1144/jgs2020-025.
Повний текст джерелаRodrigues, Ana Luísa, Maria Isabel Dias, Maria Isabel Prudêncio, Fernando Rocha, Francisco Ruiz Muñoz, Rosa Marques, María Luz González-Regalado, Dulce Russo, and Guilherme Cardoso. "Paleoenvironmental considerations based on geochemistry and mineralogy of a Miocene lacustrine calcrete, southern Portugal." E3S Web of Conferences 98 (2019): 06012. http://dx.doi.org/10.1051/e3sconf/20199806012.
Повний текст джерелаWang, Yifeng, Daniel Nahon, and Enrique Merino. "Geochemistry and dynamics of calcrete genesis in semi-arid regions." Chemical Geology 107, no. 3-4 (July 1993): 349–51. http://dx.doi.org/10.1016/0009-2541(93)90207-y.
Повний текст джерелаLintern, M. J. "The association of gold with calcrete." Ore Geology Reviews 66 (April 2015): 132–99. http://dx.doi.org/10.1016/j.oregeorev.2014.10.029.
Повний текст джерелаPhani, P. Ramesh Chandra, and M. Srinivas. "Calcrete Geochemistry in identifying Kimberlite Lamproite Exploration Targets -A case study from Nalgonda district, Telangana, southern India." International Journal of Trend in Scientific Research and Development Volume-2, Issue-2 (February 28, 2018): 964–73. http://dx.doi.org/10.31142/ijtsrd9575.
Повний текст джерелаReith, Frank, Steven A. Wakelin, Adrienne L. Gregg, and Andreas Schmidt Mumm. "A microbial pathway for the formation of gold-anomalous calcrete." Chemical Geology 258, no. 3-4 (January 2009): 315–26. http://dx.doi.org/10.1016/j.chemgeo.2008.10.023.
Повний текст джерелаHall, S. M., B. S. Van Gosen, J. B. Paces, R. A. Zielinski, and G. N. Breit. "Calcrete uranium deposits in the Southern High Plains, USA." Ore Geology Reviews 109 (June 2019): 50–78. http://dx.doi.org/10.1016/j.oregeorev.2019.03.036.
Повний текст джерелаSimpson, C. J., J. R. Wilford, L. F. Macias, and R. J. Korsch. "SATELLITE DETECTION OF NATURAL HYDROCARBON SEEPAGE: PALM VALLEY GAS FIELD, AMADEUS BASIN, CENTRAL AUSTRALIA." APPEA Journal 29, no. 1 (1989): 196. http://dx.doi.org/10.1071/aj88019.
Повний текст джерелаNeymark, L. A. "Potential effects of alpha-recoil on uranium-series dating of calcrete." Chemical Geology 282, no. 3-4 (March 23, 2011): 98–112. http://dx.doi.org/10.1016/j.chemgeo.2011.01.013.
Повний текст джерелаДисертації з теми "Calcrete geochemistry"
Wolff, Keryn Dianne. "Regional Carbonate Geochemistry and Biogeochemistry for Cu Exploration on the Yorke Peninsula, South Australia." Thesis, 2018. http://hdl.handle.net/2440/120233.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Physical Sciences, 2019
Klingberg, L. L. "Regolith-landforms and regolith geochemistry of the ‘Tomahawk’ Au-in-calcrete anomaly: Tunkillia, Gawler Craton, South Australia." Thesis, 2009. http://hdl.handle.net/2440/129278.
Повний текст джерелаThe ‘Tomahawk’ Au-in-calcrete anomaly is a zone of peak Au-in-calcrete content within the Tunkillia prospect of the central Gawler Craton, South Australia. Exploration drilling of this area has failed to intersect significant underlying mineralisation, making this an important setting to investigate controls on linkages between Au-in-calcrete expression and possible mineralisation sources. This study is the first to consider the multi-element geochemical characteristics of calcretes at ‘Tomahawk’ rather than using the Au-only approach of previous geochemical exploration. This investigation also considers the potential for laterally dispersed geochemical signatures across the landscape recorded at the surface of Au and associated elements, and suggests that Au was, and may still be physically mobilised along old and contemporary alluvial drainage depressions. There is a low relief, but locally significant drainage divide to the south of ‘Tomahawk’, so the anomaly area is associated with a point of low, broad confluence of several north flowing palaeodrainage depressions. The interpretation of these palaeolandscape controls further builds on palaeodrainage channel identification from previous studies and supports hypotheses that ‘Tomahawk’ is in an upper catchment setting, relative to the ‘Area 191’ Au-in-calcrete anomaly. Primary Au mineralisation at Tunkillia is associated with pyrite, minor galena and sphalerite within quartz-sulphide veins, and has a geochemical association with Au, Ag, Pb and Zn. Supergene Au enrichment has been recognised within ferruginised saprock overlying mineralised bedrock, and this is largely considered Au-only mineralisation. The calcrete geochemistry here shows some distinction between possible primary and secondary Au occurrences based in the trace element characteristics. The Au-in-calcrete concentrations obtained in this study are up to 194 ppb within CHep and ISps2 regolith-landforms in the north of the study area, corresponding to the lower margins of topography and areas interpreted to be within palaeodrainage systems. Silver concentrations above detection were found in association with many of the elevated Au results, therefore identifying areas of interest and possible alteration halos surrounding primary Au mineralisation. Furthermore, small exposures of weathered in situ quartz veins support a possible source for the ‘Tomahawk’ Au-in-calcrete anomaly to the south, which is immediately upslope of the palaeodrainage system.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2009
Wittwer, P. D. "Geology and geochemistry of regolith carbonate accumulations of the southwestern Curnamona Province, SA: Implications for mineral exploration." Thesis, 2004. http://hdl.handle.net/2440/123526.
Повний текст джерелаAlthough regolith carbonate accumulations (RCAs) have been extensively used in mineral exploration programs in the regolith-dominated terrains of the Yilgarn and Gawler Cratons, their use has so far been limited within the Curnamona Province, SA. This study shows how the detailed characterisation of RCAs in the southwestern Curnamona Province enhances their use in mineral exploration programs at the regional to prospect scales. A regional RCA distribution map for the study area shows that RCAs are generally widespread, although certain RCA morphological facies are dominant in different parts of the landscape, and in some areas RCAs are absent or at best a very minor component of the regolith. A dataset of whole rock geochemical assays of RCAs provides the basis of graphical presentations and geochemical maps that highlight the chemical characteristics of RCAs proximal to areas of known Au mineralisation in contrast to more distal samples. Several Au pathfinder elements in RCA assays were found to include As, W, Bi, and Mo, and greatly assist in further anomaly definition when used in conjunction with Au assays. Major element composition (e.g. Ca, Mg, Fe) showed little relationship to local landform setting, however, landscape setting appears to be a more important control on Au assay results both at the regional and prospect scales. Gold distribution in the area was independent of the presence of major elements such as calcium and magnesium. Microprobe analysis showed that Au was rare and invisible at the resolution of the analysis and existed in the calcium carbonate matrix as well as in detrital material. The composition of the underlying rock lithologies was also compared to the whole rock chemistry of the RCAs and showed the possibilities of this technique to aid geological mapping in regolith-dominated terrains and to assist in locating mineralised systems.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2004