1.0Сайт журналу «Геоінформатика»http://www.geology.com.ua/enАдміністраторhttp://www.geology.com.ua/en/blog/author/andriy/rich600338<blockquote class="wp-embedded-content" data-secret="jz1BMAo9z8"><a href="http://www.geology.com.ua/en/4289-2/">(Українська) Geoinformatika 2015; 2(54) : 52-61</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="http://www.geology.com.ua/en/4289-2/embed/#?secret=jz1BMAo9z8" width="600" height="338" title="“(Українська) Geoinformatika 2015; 2(54) : 52-61” — Сайт журналу «Геоінформатика»" data-secret="jz1BMAo9z8" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=http://www.geology.com.ua/wp-includes/js/wp-embed.min.js /* ]]> */ </script> Geoinformatika 2015; 2(54) : 52-61 (in Russian) DEPENDENCE OF LOW VELOCITY ZONES PARAMETERS ON MINERAL COMPOSITION OF UKRAINIAN SHIELD ROCKS IN DIFFERENT РТ-CONDITIONS OF EXPERIMENT E.E. Karnaukhova Institute of Geophysics of Ukraine National Academy of Science, 32 Palladin Ave., Kyiv 03680, Ukraine, e-mail: karnauhovaee@gmail.com Purpose. The purpose of the article is to conduct experimental studies of low velocity zone (LVZ) parameter dependences on the mineral content of Ukrainian Shield rocks in the programmed PT-conditions. Design/methodology/approach. To solve the problem a method of multidimensional correlation-regression analysis was used, together with the explosion seismology data. The results obtained are presented as descriptive statistics, histograms, schedules, linear pair and plural cross-correlation dependences. Originally, the regional collection of rocks was preliminarily studied in laboratory conditions at atmospheric pressure and room temperature. The petrographic analysis was carried out. The most representative samples were investigated at hydrostatic pressure up to 0,5-0,6 Gpa. After this information, was statistically processed, we selected groups of samples which were studied under the simultaneous P and T effect. In these studies, P and T were changed according to the PT-program of possible regional change of these parameters with depth. According to the conditions of the experiment, a rock sample was supposed to “plunge” gradually to the preset depth and simultaneous measurements of the Vp, VS were made and the volume decrement was measured. Findings. The experiments show that the Vp, VS = f(PT) = f(H) dependences have complicated regularities: on the curves show velocity inversion zones with maxima and minima manifestation. Inversion zones change their width with depth (ΔH) and decrease the velocity maximally (ΔVp). Here the rocks are characterized by low Young and shear modules, high brittleness (low Poisson’s ratio), high discompaction (high dilatancy), and low thermal conductivity (λ). The inversion zones established by laboratory experiments in most cases are in good agreement with LVZ in the Earth’s crust from DSS profiles. For the most selected groups of rocks ΔVp is 0,02-0,16 km/s; ΔH is in the depths interval of 6-20 km. In all the rock groups, elastic parameters dependences on the percentage content of rock-forming minerals tend to decline depth. In LVZ the influence of the mineral composition on elastic parameters is low and considerably less than structural transformations of rocks. Practical value/implications. The obtained experimental and statistically treated data of a broad spectrum of Ukrainian Shield rocks may be used for petrophysical crustal modeling, enabling us to predict the content and state of the Earth’s crust mineral matter. Keywords: mineral composition, pressure, temperature, elastic waves propagation velocity, cross-correlation dependences, low velocity zones. The full text of papers References: Belikov B.P., Аleksandrov K.S., Ryzhova T.V. Uprugie svojstva porodoobrazujushhih mineralov i gornyh porod [Elastic properties of rock-forming minerals and rocks]. Moscow, Nauka, 1970, 275 p. Burtnyj P.А., Коrchin V.А., Каrnaukhova Е.Е. Modelirovanie veshhestvennogo sostava glubinnyh gorizontov zemnoy kory (novaja koncepcija interpretacii geofizicheskih dannyh) [Material composition modelling of the Earth’s crust deep horizons (new conception of geophysical data interpretation)]. Saarbrucken, LAP Lambert Akademic Publishing, 2013, 188 p. Zhukov M.N. Statustychnyj analiz geologichnyh danyh [Statistical analysis of geological data]. Kyiv, ІSDO, 1995, 552 p. Karnaukhova Е.Е., Коrchin V.А. Vlijanie mineral’nogo sostava granitoidov Ukrainskogo shchita na izmenenie ih uprugih parametrov v razlichhyh termobaricheskih uslovijah litocfery (po jeksperimental’nym dannym) [Effect of mineral content of Ukrainian Shield granitoids on the change of their elastic parameters in different thermobaric conditions of the lithosphere (by experimental data)]. Suchasni problemy geologichnoi nauky: Zbirnyk naukovykh prats. Kyiv, 2003, pp. 22-24. Karnaukhova Е.Е. Pruzhno-shhil’nistni parametry girs’kyh poridUkrains’kogo shhyta v umovah vysokogo tysku I temperatur: avtoref. dys. kand. geol. nauk: 04.00.22 “Geofizika” [Elastic-density parameters of the Ukrainian shield rocks under conditions of high pressure and temperature. Abstract of the diss. Cand. Geology “Geophysics”]. Kyiv, 2010, 20 p. Kaplan A.V., Kaplan V.E., Mashhenko M.V. Matematika, statistika, jekonomika na komp’jutere [Mathematics, statistics, economy on a computer]. Moscow, DMK Press, 2006, 600 p. Коrchin V.А. Termodinamika korovyh zon nizkih sejsmicheskih skorostej (novaja nauchnaja gipoteza) [Thermodynamics of low seismic velocity crust zones (new scientific hypothesis)]. Saarbrucken, LAP Lambert Akademic Publishing, 2013, 280 p. Коrchin V.А., Burtnyj P.А., Karnaukhova Е.Е. Termobaricheskoe petrofizicheskoe prognoznoe modelirovanie veshhestvennogo sostava glubinnyh gorizontov litocfery pri interpretacii materialov glubinnogo sejsmicheskogo zondirovanija [Thermobaric petrophysical prognosis modelling of the material composition of lithosphere deep horizons during interpretation of the deep seismic sounding materials]. Theoretical and applied aspects of geoinformatics. Kyiv, 2010, pp. 157-172. Lebedev Т.S., Коrchin V.А., Savenko B.Ya. Petrofizicheskie issledovanija pri vysokih РТ-parametrah i ih geofizicheskie prilozhenija [Petrophysical high PT-studies and their geophysical applications]. Kyiv, Naukova dumka, 1988, 248 p. Fizicheskie svojstva gornyh porod i poleznyh iskopaemyh (petrofizika). Spravochnik geofizika [Physical properties of rocks and minerals (petrophysics). Reference book of geophysicist; ed. N.B. Dortman]. Moscow, Nedra, 1984, 455 p.