Geochemistry International最新文献

{"title":"Geochemistry and Formation Conditions of Mesoarchean Banded Iron Formations (BIF-1) from the Kostomuksha Greenstone Belt, Karelian Craton","authors":"A. I. Slabunov,&nbsp;N. S. Nesterova,&nbsp;O. A. Maksimov","doi":"10.1134/S0016702924030054","DOIUrl":"10.1134/S0016702924030054","url":null,"abstract":"<div><p>Three variably old groups of banded iron formation (BIF) are known in the Kostomuksha Greenstone Belt (KGB) of the Karelian Craton. This paper deals with the earliest of them, Mesoarchean (2.87–2.81 Ga) BIF-1. BIF-1 occurs among the komatiite–basalt unit of the KGB. BIF-1 consists mainly of quartz and magnetite, with varying amounts of amphibole, biotite, and garnet; the variations of SiO₂ (48.3–58.6 wt %) and <span>({text{F}}{{{text{e}}}_{{text{2}}}}{text{O}}_{{text{3}}}^{{text{T}}})</span> (21.34–33.82 wt %) suggest that the rocks are BIF. BIF-1 of the KGB, as well as most Archean BIFs, contain high <span>({text{F}}{{{text{e}}}_{{text{2}}}}{text{O}}_{{text{3}}}^{{text{T}}})</span> concentration, display a contrasting positive Eu anomaly, lack of Ce anomaly, and the depletion of LREE relative to HREE. However, they differ from other BIFs in the higher Al₂O₃, TiO₂, MgO, K₂O, Cr, Ni, Zr, Ba, Cu and Zn concentrations. BIF-1 was formed in a marine basin at an anoxic atmosphere due to hydrothermal fluids, the proportion of which varies from 20 to 80%, and a terrigenous component derived mainly from basalts, komatiites, and dacites of host rocks. Mesoarchean BIF-1 of the KGB was accumulated in a small rift structures within an oceanic volcanic plateau, the formation of which is associated with the influence of a mantle plume on the oceanic lithosphere.</p></div>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 3","pages":"245 - 266"},"PeriodicalIF":0.7,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140567751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variability of Stishovite Genesis under Terrestrial Conditions: Physicogeochemical Aspects","authors":"Yu. A. Litvin,&nbsp;A. V. Spivak,&nbsp;A. V. Kuzyura","doi":"10.1134/S0016702924020071","DOIUrl":"10.1134/S0016702924020071","url":null,"abstract":"<p>A model of the genesis of stishovite and other SiO₂ phases in terrestrial matter is developed; it combines the physicochemical and geodynamic conditions of their formation. Based on the experimental data, a <i>P–T</i> diagram of SiO₂ polymorphs in combination with the boundaries of geospheres and geotherm was plotted. Stishovite and other SiO₂ phases of cosmic-impact synthesis were buried in the early Earth during the period of meteorite accretion (50 Ma). These SiO₂ phases are completely assimilated by melts of the pyrolite global magma ocean that existed for 500 Ma. By 2.0 Ga, the magma ocean crystallized, and the Earth’s crust, upper mantle, transition zone, and lower mantle with layer D” (with seismic boundaries between them) were formed. During this period, the main mass of the Earth’s core was separated, which completed by 2.7 Ga. As a result, the gravitational field intensified, which contributed to the fractional ultramafic–mafic evolution of mantle magmas with peritectic reactions of ringwoodite–akimotoite in the transition zone and bridgmanite in the lower mantle with melts and the formation of stishovite (shown experimentally at 20 and 26 GPa). These reactions in diamond-forming carbonate–silicate–carbon melts provided the formation of stishovite, which was captured as a paragenetic inclusion by diamonds and transported to the Earth’s surface by magmas. The genesis of stishovite under the terrestrial conditions is controlled by global mantle convection as well. The subduction of lithospheric plates to layer D'' near the liquid core was accompanied by the formation of stishovite, and then its transformation into poststishovite phases. When superplumes rise from layer D'' to the Earth’s crust, the peritectic reactions of postperovskite and bridgmanite, and then ringwoodite–akimotoite, with melts are likely to form stishovite and cause its subsequent transformation into low-pressure SiO₂ phases. With the emergence of the Earth’s crust, the impact-meteorite genesis of stishovite resumes. Stishovite that formed under the terrestrial conditions appears as an inclusion in ultradeep diamonds on the Earth’s surface. Stishovite of cosmic-impact synthesis is preserved in meteorite craters. In both cases, stishovite is a metastable phase.</p>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 2","pages":"124 - 139"},"PeriodicalIF":0.7,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140567756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Partition of Trace Elements between Minerals and Melt: Parameterization of Experimental Data on Olivine, Pyroxene, and Feldspars","authors":"A. V. Girnis","doi":"10.1134/S0016702924030030","DOIUrl":"10.1134/S0016702924030030","url":null,"abstract":"<p>The partition of trace elements between minerals (olivine, orthopyroxene, clinopyroxene, and feldspars) and silicate melts is analyzed based on experimental data within broad <i>P</i>–<i>T</i> ranges (from 1 atm to 10 GPa and ∼1000–2000°C) and the compositions of melts (from ultramafic to ultrasilicic) and minerals. The dependences of the logarithmic partition coefficients (ln<i>D</i>_<i>i</i>) on <i>P</i>–<i>T</i> parameters and compositions are approximated by linear functions of 1/<i>T</i>, <i>P</i>/<i>T</i> (where <i>P</i> is pressure and <i>T</i> is temperature in K) and compositional parameters of the minerals and melts. The <i>D</i>_<i>i</i>/<i>D</i>_<i>j</i> ratios of a large number of pairs of elements are found out to be independent of experimental parameters and vary within narrow ranges. The parameters of the dependences of <i>D</i>_<i>i</i> on <i>P</i>–<i>T</i> and compositions are estimated by minimizing the squared deviations of model <i>D</i>_<i>i</i> and <i>D</i>_<i>i</i>/<i>D</i>_<i>j</i> values from experimental ones. The dependences thus derived make it possible to calculate <i>D</i>_<i>i</i> for numerous elements accurate to a factor of 1.2–2.0. As an illustrative example, a model is discussed for the derivation of mafic basaltic melts in mid-oceanic ridges at the melting of a peridotite source and crystallization of primary magmas under crustal parameters.</p>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 3","pages":"221 - 233"},"PeriodicalIF":0.7,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140567855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Study of the ({text{Mo}}{{{text{O}}}_{{text{2}}}}{text{Cl}}_{{2left( {{text{aq}}} right)}}^{^circ }) Stability in Hydrothermal Solutions at 100–350°C and Saturated Vapor Pressure","authors":"A. A. Yakimenko,&nbsp;A. Yu. Bychkov","doi":"10.1134/S0016702924030066","DOIUrl":"10.1134/S0016702924030066","url":null,"abstract":"<div><p>The solubility of crystalline MoO₃ in HCl solutions with variable concentration was investigated at 100, 155, 200, 250, 300, 350°C and saturated vapor pressure. The results showed that the MoO₃ solubility increases with increasing HCl concentration. Using the OptimA program, the Gibbs energies of MoO₂Cl₂ complex have been determined. The stability constants of MoO₂Cl₂ are calculated according to the reaction:</p><div><div><span>$${text{Mo}}{{{text{O}}}_{{{text{3(c)}}}}} + 2{text{HC}}{{{text{l}}}_{{{text{(aq)}}}}} to {text{Mo}}{{{text{O}}}_{{text{2}}}}{text{Cl}}_{{2{text{(aq)}}}}^{^circ } + {{{text{H}}}_{{text{2}}}}{{{text{O}}}_{{{text{(l)}}}}}.$$</span></div></div><p>The <i>pK</i> values are 1.07 ± 0.29; 1.06 ± 0.49; 1.74 ± 0.71; 1.83 ± 0.47; 1.50 ± 0.28; 0.95 ± 0.57, respectively, at 100, 155, 200, 250, 300, 350°C (saturated vapor pressure).</p></div>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 3","pages":"267 - 273"},"PeriodicalIF":0.7,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140567849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atacamite from the Paleofumaroles of Mount 1004, Tolbachik Volcano, Kamchatka: Thermodynamic Properties","authors":"Yu. D. Gritsenko,&nbsp;M. O. Bulakh,&nbsp;L. P. Ogorodova,&nbsp;M. F. Vigasina,&nbsp;L. V. Melchakova,&nbsp;D. A. Ksenofontov","doi":"10.1134/S001670292402006X","DOIUrl":"10.1134/S001670292402006X","url":null,"abstract":"<p>Atacamite, empirical formula (Cu_1.97Zn_0.01)Cl_0.94(OH)_3.02, from the paleofumaroles of the monogenic volcano of Mount 1004, Tolbachik, Kamchatka, Russia, has been studied by thermal and electron microprobe analyses, X-ray powder diffraction, IR and Raman spectroscopy, and Calvet microcalorimetry. The thermal decomposition of atacamite was studied using X-ray diffraction and IR spectroscopy. The enthalpy of formation from elements for atacamite of the theoretical composition Cu₂Cl(OH)₃ (−810.2 ± 7.7 kJ/mol) was determined by melt dissolution calorimetry, and the Gibbs energy of formation (−657.0 ± 7.7 kJ/mol) was calculated. The stability of atacamite in the Cu–O–Cl–H system was thermodynamically modeled based on the obtained data, and the boundaries of its stability field were calculated under conditions of high alkalinity and high acidity of the mineral-forming medium.</p>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 2","pages":"172 - 183"},"PeriodicalIF":0.7,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140567857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variability of the Chemical Composition of Pine Forest Components in the Forest-Steppe of the Chelyabinsk Region under the Influence of Anthropogenic Load","authors":"N. V. Terekhina,&nbsp;A. D. Glinskikh","doi":"10.1134/S0016702924020083","DOIUrl":"10.1134/S0016702924020083","url":null,"abstract":"<div><p>The work provides a comprehensive assessment of changes in the intensity of pollution of soils and plants of pine forests with increasing distance from the main sources of pollution. Within the forest-steppe zone of the Chelyabinsk region, zones of environmental tension have been identified based on the summary index of soil contamination with mobile forms of chemical elements and on the level of pine bark contamination. The main polluting elements were Cr, Pb, Zn, Cd, the content of which in soils was tens of times higher than the background values. The same pollutants and Cu were noted for pine bark, but their concentrations were significantly lower and exceeded the background only several times. High values of correlation coefficients between pollution indicators for soils and bark were noted for Pb, Cu, Zn and the summary indices of contamination. The content of most of the studied chemical elements in pine needles does not exceed background values, but the Al and Ni content in some plots near industrial enterprises can be 2–4 times higher than background values.</p></div>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 2","pages":"208 - 219"},"PeriodicalIF":0.7,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140567860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimated Age and Metamorphic Parameters of High-Pressure Blastolites in the Gonzhinskii Block, Argun Superterrane, Eastern Part of the Central Asian Orogenic Belt","authors":"M. M. Fugzan,&nbsp;T. I. Kirnozova,&nbsp;V. M. Kozlovskii,&nbsp;R. O. Ovchinnikov,&nbsp;I. K. Kozakov","doi":"10.1134/S0016702924020058","DOIUrl":"10.1134/S0016702924020058","url":null,"abstract":"<p>Petrographic and thermobarometric data obtained on a blastolite lens hosted in sheared rocks of the Gonzhinskii block indicate that the lens contains four mineral assemblages: relict, main, an assemblage corresponding to biotitization, and that of retrograde alterations. The relict assemblage was likely eclogitic. The main mineral assemblage corresponds to zoisite amphibolite developing after eclogite. The <i>P</i>−<i>T</i> metamorphic parameters of this assemblage are <i>P</i> = 13.0−15.0 kbar and <i>T</i> = 580−670°C. However, if the calculations are done using the iron richest outer rim of amphibole 1, the <i>P</i>−<i>T</i> parameters are <i>P</i> = 13.0−17.0 kbar and <i>T</i> = 660−780°C. The mineral assemblage corresponding to the overprinted biotitization is clearly distinct texturally. The lines of the monomineral equilibria of the biotite assemblage plotted using various combinations of the composition of the garnet, biotite, and plagioclase well converge within a compact field of <i>P</i> = 12.5−13.2 kbar and <i>T</i> = 810−830°C. The latest assemblage of retrograde minerals includes low-Al amphibole 2. Our original Sm−Nd isotope date were used to calculate an isochron for a whole-rock sample, garnet, and two amphiboles. The isochron age of the rock is 171 ± 3 Ma and is interpreted as the age of the main mineral assemblage, i.e., its crystallization at the metamorphic peak.</p>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 3","pages":"234 - 244"},"PeriodicalIF":0.7,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140567874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quartz Diorites of the Volkovsky Ore-Bearing Massif (Middle Urals, Russia): U–Pb Age, Nd–Sr–Pb Isotope Systematics, Geochemical Features, Petrogenetic, and Geodynamic Consequences","authors":"E. V. Anikina,&nbsp;N. M. Kudryashov,&nbsp;N. G. Soloshenko,&nbsp;I. A. Rusin,&nbsp;M. V. Chervyakovskaya","doi":"10.1134/S0016702924020022","DOIUrl":"10.1134/S0016702924020022","url":null,"abstract":"<div><p>The paper reports the results of U–Pb dating, Nd–Sr–Pb isotope systematics, and geochemical study of quartz diorites associated with ore-bearing (Cu–Pd–Au–Ag) gabbro of the Volkovsky massif, which is localized within the Urals Platinum Belt, at its eastern border with the Silurian–Devonian volcanogenic complexes of the Tagil megazone. The age of the quartz diorites according to U–Pb (TIMS) dating is 429 ± 9 Ma, MSWD = 0.009. Sr–Nd–Pb isotope characteristics (ε_Nd(T) = +5.5…+6.7; (⁸⁷Sr/⁸⁶Sr)_t = 0.70382–0.70392; ²⁰⁶Pb^/204Pb = 18.38–18.57; ²⁰⁷Pb/²⁰⁴Pb = 15.56–15.58; ²⁰⁸Pb/²⁰⁴Pb = 38.14–38.30) indicate a juvenile source with a model age of 570–760 Ma. The obtained data fall within values typical of basalts of ensimatic island arcs. The geochemical features of the granitoids of the Volkovsky massif (low REE concentration, differentiated REE pattern (La/Yb = 8–14) with a weak positive Eu anomaly (Eu/Eu* = 0.9–1.4)) are consistent with the characteristics of melts obtained in experiments on hydrous melting of mafic rocks in equilibrium with amphibole–pyroxene residue. The anomalous concentration of strontium (more than 1000 ppm) in the quartz diorites is due to the high content of this element in a source. Such source could be the oldest rocks of the Urals Platinum Belt—olivine gabbro and metamorphic rocks of their surroundings. The identical ages of the quartz diorites of the Volkovsky massif and monzonitoids of the Kushvinsky massif allow us to consider these rocks as the result of the almost simultaneous mantle and crust melting at the final stage of the formation of the Tagil island-arc system.</p></div>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 2","pages":"155 - 171"},"PeriodicalIF":0.7,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140567858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Major, Volatile, Ore, and Trace Elements in Magmatic Melts in the Earth’s Dominant Geodynamic Settings. II. Similarities and Differences","authors":"V. B. Naumov,&nbsp;A. V. Girnis,&nbsp;V. A. Dorofeeva","doi":"10.1134/S0016702924010075","DOIUrl":"10.1134/S0016702924010075","url":null,"abstract":"<p>Based on the mean contents of elements and their standard deviations estimated in the first part of this contribution (Naumov et al., 2023), we compared in detail the geodynamic settings distinguished earlier. In order to compare the compositions of mafic melts, a correction was introduced for changes related to the fractionation of the main minerals. Using numerical criteria, the elements were arranged in a sequence of the increasing degree of compatibility during melting and crystallization, and regular variations in element contents normalized to the mean composition of oceanic-island melts were distinguished. The melts of mid-oceanic ridges show a monotonous increase in normalized contents from the most incompatible (Cs, Ba, U, La, etc.) to compatible elements (Sc, Ni, and Cr). The settings of convergent plate boundaries show relative enrichment in the most incompatible elements and significant negative Ta−Nb anomalies relative to neighboring elements. The magmas of continental rifts show the most significant enrichment in the most incompatible elements, as well as Pb, Li, and some other elements. Indicator element ratios showing significant variations between the settings were distinguished for mafic melts. Some element ratios are almost identical (within observed variations) in mafic melts from all the settings. The mean element ratios in mafic, intermediate, and silicic magmas show three types of behavior. Some ratios (including the canonic ratios Nb/Ta, Zr/Hf, etc.) in intermediate and silicic magmas are inherited from the composition of mafic melts. Some ratios show irregular changes from mafic to silicic melts (Sr/Cr, F/Th, etc.). Some other ratios change monotonously and significantly in the sequence from mafic to silicic melts (Ni/Yb, Lu/P, etc.). The variations in element ratios are related to the crystallization differentiation of melts and contributions of geochemically contrasting reservoirs.</p>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 1","pages":"18 - 31"},"PeriodicalIF":0.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140524970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Precision Determination of Carbon Isotope Composition and Concentration of Dissolved Inorganic Carbon in Seawater","authors":"E. O. Dubinina,&nbsp;S. A. Kossova,&nbsp;Yu. N. Chizhova","doi":"10.1134/S0016702924010038","DOIUrl":"10.1134/S0016702924010038","url":null,"abstract":"<p>Determination of the isotopic composition and concentration of dissolved inorganic carbon (DIC) in sea water requires not only high measurement accuracy, but also the development of unified approaches to data standardization and material collection. In this work, we studied the effect of sampling methods (“into containers” and “into vials with acid”) with and without the addition of a toxin) on the results of determining the values of δ¹³С(DIC) and the concentration of DIC in sea water. The analytical protocol is described in detail, based on many years of experience in the sample collection, measurement and standardization of data obtained for a large number of water samples of the Arctic seas. According to the above protocol, the values of δ¹³С(DIC) and [DIC] can be determined with an error of less than 0.05‰ (1σ) and 4.5 rel % respectively. It has been shown that sampling “in a vial with acid” with their storage for 4 months is accompanied by significant contamination by atmospheric carbon dioxide with an underestimation of δ¹³С(DIC) values by an average of 0.3–0.8‰ and an overestimation of [DIC] values by an average of two times. The absence of a toxin that stops biological activity does not lead to significant shifts in the DIC concentration, but it strongly affects the δ¹³С(DIC) values, which become underestimated by an average of 1‰. Using sampling “in a container” and toxin addition, along with following other recommendations, the samples retain the isotope and concentration parameters of DIC throughout the year.</p>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"62 1","pages":"45 - 54"},"PeriodicalIF":0.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140516309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}