Petrology最新文献

{"title":"Fenner Trend and the Role of Fractional Crystallization and Ferrobasaltic Magma Immiscibility in Granophyre Petrogenesis: the Case of the Mesoproterozoic Valaam Sill in the Ladoga Graben, Karelia","authors":"A. A. Nosova,&nbsp;N. M. Lebedeva,&nbsp;A. A. Vozniak,&nbsp;L. V. Sazonova,&nbsp;I. A. Kondrashov,&nbsp;Y. O. Larionova,&nbsp;E. V. Kovalchuk","doi":"10.1134/S086959112470005X","DOIUrl":"10.1134/S086959112470005X","url":null,"abstract":"<div><p>This paper presents the results of petrographical, mineralogical, geochemical, and isotope-geochemical studies of granophyres and host ferrogabbros, quartz ferromonzogabbros, quartz monzodiorites, and quartz monzonites in the Mesoproterozoic Valaam sill in the Ladoga Graben on the Karelian Craton. The sill is poorly layered: the ferrogabbros compose the lower part of the sill, the middle part consists of quartz gabbro-monzonites and quartz monzonites, while graphic leucogranites (granophyres) form a dense network of veins mainly in the upper part of the sill. Geochemical features of ferrogabbro, iron-rich composition of olivine and pyroxene, and low Ca composition of plagioclase indicate the evolution along the Fenner trend. The granophyres have petro- and geochemical characteristics of anorogenic alkaline granites, with negative Eu/Eu* = 0.15–0.49 and REE distribution patterns similar to those of granophyres of layered intrusions. All rocks of the sill have close Sr isotopic composition (⁸⁷Sr/⁸⁶Sr)_T = 0.7043–0.7066, and ε_Nd values ranging from −9.6 to −11.2. Model calculations show that fractional crystallization can lead the initial ferrogabbro melt into the immiscibility field. Ilmenite–magnetite–silicate microstructures have been identified in the ferrogabbro and ferromontzogabbro from the sill; similar microstructures in layered intrusions are considered as evidence for the immiscibility of Fe-rich and Si-rich liquids (Holness et al., 2011; Dong et al., 2013). The segregation of the high-silica melt may have occurred in an intermediate crustal chamber at around 350 MPa and 960^oC; magma was supplied as crystalline mush at the sill emplacement level at around 70 MPa and acidic melt migrated through it. This melt underwent fractional crystallization and interacted with host minerals. At the level of sill emplacement, it crystallized under supercooling into granophyre aggregates. The example of the Valaam sill shows that when the Fenner fractionation reaches the final composition–-ferrogabbro, its further evolution with a conjugate decrease in SiO₂ and Fe contents can be related to the incomplete separation and mixing of Fe-rich melts and immiscibly split felsic melt. Such a mechanism can be implemented for the formation of the mafic part of AMCG-type massifs.</p></div>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 3","pages":"307 - 336"},"PeriodicalIF":1.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141167664","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":"Model of the Formation of Monzogabbrodiorite–Syenite–Granitoid Intrusions by the Example of the Akzhailau Massif (Eastern Kazakhstan)","authors":"P. D. Kotler,&nbsp;S. V. Khromykh,&nbsp;A. V. Zakharova,&nbsp;D. V. Semenova,&nbsp;A. V. Kulikova,&nbsp;A. G. Badretdinov,&nbsp;E. I. Mikheev,&nbsp;A. S. Volosov","doi":"10.1134/S086959112402005X","DOIUrl":"10.1134/S086959112402005X","url":null,"abstract":"<div><p>This paper presents a model of the formation of a multiphase Akzhailau granitoid massif formed within a Caledonian block of the Earth’s crust in the Hercynian time. This work is based on the results of major and trace element composition, geochronological, mineralogical and isotope-geochemical studies. Three stages of the formation of the Akzhailau massif are distinguished, which differ significantly from the previously accepted concepts about the multicomplex and polychronous origin of this intrusion: (1) the formation of moderately alkaline A₂-type leuсogranites (308–301 Ma); (2) intrusion of monzodiorites into the base of leucogranites (~295 Ma), increasing degree of partial melting of protoliths with the formation of syenites and moderately alkaline granites of I-type (294–292 Ma); (3) intrusion of dikes and small bodies of alkaline ferroeckermannite A₁-type leucogranites in the west and north of massif (~289 Ma). The Akzhailau massif was formed within about 15 Myr in the middle–upper crust through the interaction of plume-related subalkaline basitic magmas with metamorphosed crustal protolith of the orogenic structure.</p></div>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 2","pages":"179 - 200"},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140775244","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 Modeling of Interaction between Fluorine-Containing Granite Melt and Calcite Marble","authors":"Ya. O. Alferyeva,&nbsp;E. N. Gramenitsky,&nbsp;A. S. Novikova","doi":"10.1134/S0869591124020024","DOIUrl":"10.1134/S0869591124020024","url":null,"abstract":"<p>At 750°C and a pressure of 1 kbar, an experiment was carried out simulating the contact-reaction interaction of calcite and a highly evolved fluorine-containing granite melt. The water content in the system did not exceed 10% of the dry charge mass. The possibility of interaction between magmatic melt and calcite is shown. The experimental products contain a zoned column composed of liquid phases and crystalline minerals. In the apocarbonate part, the newly formed phases are cuspidine, quartz, wollastonite, grossular, and a non-crystalline carbonate–fluoride phase <i>LCF</i>. The mineral assemblages in the zones of the apocarbonate part of the column vary depending on the ratio of CO₂ and HF activities. In the silicate part, aluminosilicate glass, alkali feldspar, and plagioclase of variable composition were found. Silicon and fluorine are intensively transferred from the silicate to carbonate part, and a small amount of calcium is transferred in the opposite direction.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 2","pages":"236 - 248"},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140795770","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":"Mineralogical Characteristics and Magmatic Evolution Significance of Garnets in the Late Jurassic Granites in Xingcheng, Eastern North China Craton","authors":"Shiyao Gao,&nbsp;Zhongjie Xu,&nbsp;Fufeng Zhao,&nbsp;Ke Cao,&nbsp;Nanyu Tang","doi":"10.1134/S0869591124020085","DOIUrl":"10.1134/S0869591124020085","url":null,"abstract":"<p>A series of Mesozoic granites related to the subduction of the ancient Pacific plate are widely developed in the eastern part of the North China Craton. These granites contain garnet as a minor phase. Garnet records important information such as magma composition, temperature and pressure, and is an important object in the study of petrological evolution of granites. We take the late Jurassic garnet–bearing monzogranite in Xingcheng, Liaoning as the research object, and the magmatic evolution process in the study area is discussed by the in–situ element geochemical variation and the Raman effect of magmatic garnet girdle. It is found that the garnet has a zonation structure in which the contents of MnO and CaO increase and then decrease, while the contents of FeO and MgO decrease and then increase from the core to the edge. Through the simulation of the crystallization sequence of garnet and biotite, it is found that the garnet has “M” type “spessartine bell–shaped profile”, Mn/(Ca + Mg + Fe) value and Mn/Fe value, which reflects that the crystallization pattern of minerals in the magma is dominated by biotite crystallization to garnet crystallization. It is considered that forward and reverse girdle can exist in the same garnet; the separation and crystallization of minerals in the late magmatic evolution is the main reason for the change in the compositional profile of the garnet. This is consistent with the late evolution of granitic magmas in the northeastern of the North China Craton after the late Jurassic.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 2","pages":"283 - 305"},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140783707","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":"Genesis of Dunite from the Guli Puton according to Olivine-Hosted Melt Inclusion Data","authors":"L. I. Panina,&nbsp;A. T. Isakova,&nbsp;E. Yu. Rokosova","doi":"10.1134/S0869591124020061","DOIUrl":"10.1134/S0869591124020061","url":null,"abstract":"<div><p>Olivine from the dunite of the Guli pluton crystallized from olivine–melanephelinite magma at temperatures above 1260°C according to the melt inclusion study. The melts were enriched with volatile components (S, CO₂, F, H₂O, slightly Cl) and contained high amount of incompatible elements. In addition, olivine hosts sporadic inclusions of picrite-basalt composition, which are close to picrite–meimechite melts preserved in chromite from dunite according to literature data. This suggests the influx of picrite–meimechite melts and their mixing with melanephelinite magma during the formation of dunites in the magma chamber. Based on the indicator ratios of incompatible elements, these melts and melanephelinite magma had different sources, which were located in undepleted mantle at different depths and derived through different degree of partial melting.</p></div>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 2","pages":"201 - 214"},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140761273","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":"Chlorine Solubility in Silicate Melts: New Experiments and Thermodynamic Mixing Model","authors":"L. Y. Aranovich,&nbsp;M. A. Golunova,&nbsp;J. A. D. Connolly,&nbsp;M. V. Ivanov","doi":"10.1134/S0869591124010028","DOIUrl":"10.1134/S0869591124010028","url":null,"abstract":"<p>We present new experimental data on Cl solubility in model basalt melts of eutectic compositions diopside (<i>Di</i>)–albite (<i>Ab</i>) and <i>Di</i>–anorthite ± quartz (<i>Qtz</i>). The starting glasses were equilibrated with aqueous NaCl–CaCl₂ fluid at 4 kbar in the temperature range of 900–1200°C. The experiments show that Cl solubility decreases with increasing NaCl in the fluid. Ca–Na partitioning between melts and fluid is weekly temperature dependent and resembles that of the plagioclase–fluid system. The newly obtained experimental data, along with previously published results on the model granite melting in the presence of (Na,K)Cl brines (Aranovich et al., 2013), are used to calibrate an empirical thermodynamic model for salt species (NaCl, KCl, and CaCl₂) in silicate melt. Calculations show that Cl solubility in haplogranite melt decreases with increasing K/Na ratio in the fluid (and correspondingly, melt). The data acquired on Ca and Na partitioning between melt and fluid make it possible to model the evolution of the Ca/Na ratio in the crystallization course of basalt melts. At a high pressure (10 kbar), Cl solubility in model granite increases with increasing Н₂О content. The calculated phase diagram for a simple pseudo-ternary system <i>Ab</i>–H₂O–NaCl demonstrates complex phase relations and, correspondingly, evolution of the Н₂О and NaCl concentrations in the melt. This complex evolution is illustrated by data on the composition of quartz-hosted melt and fluid inclusions from granites in the Verkhneurmisskii massif in the Badzhal volcano-plutonic zone.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 1","pages":"41 - 52"},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0869591124010028.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Meta-Ultramafic Rocks of the Maksyutov Complex, Southern Urals: High-Pressure Si–Al Metasomatism and Carbonatization at the Crust–Mantle Interface in the Subduction Zone","authors":"A. L. Perchuk,&nbsp;N. G. Zinovieva,&nbsp;A. V. Sapegina,&nbsp;P. M. Valizer,&nbsp;V. M. Kozlovsky,&nbsp;V. M. Grigorieva,&nbsp;S. T. Podgornova","doi":"10.1134/S0869591124010065","DOIUrl":"10.1134/S0869591124010065","url":null,"abstract":"&lt;p&gt;&lt;b&gt;Abstract&lt;/b&gt;—The Maksyutov eclogite–blueschist Complex is characterized by a complicated fold-and-thrust structure that has been formed during the Late Devonian collision between the subducting Baltica margin (East European Plate) and the Magnitogorsk island arc. Eclogites are the most studied rocks of the Complex; their formation and exhumation are usually associated with the collisional stage of the orogen development. At the same time, the origin of meta-ultramafic rocks, which together with eclogites form sheets and boudins within metasedimentary rocks (schists and quartzites), still remains unknown. This paper presents the results of the first detailed petrological study of meta-ultramafic rocks represented by antigorite−chlorite and magnesite−antigorite meta-harzburgites, and chlorite−antigorite metaorthopyroxenite. Mineral compositions and textural relationships between minerals in the meta-harzburgites indicate at least two stages of rock transformations. Minerals of the early mineral paragenesis (first stage)—olivine, accessory chromite, and low-fluorine Ti-clinohumite – have a metamorphic genesis; ultrahigh-pressure (UHP) conditions of their formation are discussed. Partial replacement of olivine by orthopyroxene-bearing parageneses with Cr−Al antigorite and/or high-chromium chlorite is established for the second stage. The phase equilibria modeling using the Perple_X software package demonstrates that formation of antigorite−orthopyroxene paragenesis was associated with Si−Al metasomatism at: &lt;i&gt;T&lt;/i&gt; ~ 630°С, &lt;i&gt;P&lt;/i&gt; ~ 2 GPa, log&lt;span&gt;({{a}_{{{text{Si}}{{{text{O}}}_{{text{2}}}}}}})&lt;/span&gt;  ~ −0.6, log&lt;span&gt;({{a}_{{{text{A}}{{{text{l}}}_{2}}{{{text{O}}}_{3}}}}})&lt;/span&gt; ~ −2.5. It is important to note that the mineral paragenesis is highly sensitive to &lt;span&gt;({{a}_{{{text{Si}}{{{text{O}}}_{{text{2}}}}}}})&lt;/span&gt;: a slight decrease in log &lt;span&gt;({{a}_{{{text{Si}}{{{text{O}}}_{{text{2}}}}}}})&lt;/span&gt; relative to the above value would lead to the growth of olivine with antigorite, and an increase would lead to the growth of orthopyroxene. The latter may explain the formation of meta-orthopyroxenites, which are widely distributed among the meta-ultramafic rocks of the Maksyutov Complex. Similar calculations performed for the range of &lt;span&gt;({{X}_{{{text{C}}{{{text{O}}}_{2}}}}})&lt;/span&gt; = 0.01–0.05 in H&lt;sub&gt;2&lt;/sub&gt;O–CO&lt;sub&gt;2&lt;/sub&gt; fluid showed the replacement of silicate minerals by magnesite under the established thermodynamic conditions. Carbonation and Si−Al metasomatism are specific features of high-pressure transformations of meta-ultramafic rocks, which have not been established in the associated eclogites, quartzites, and shales. Such selective fluid influence on different rock types is interpreted as a result of their different tectono-metamorphic evolution: meta-ultramafic rocks are fragments of the suprasubduction mantle, which were tectonically juxtoposed with the rocks of the subducting plate (eclogites and metasedimentary r","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 1","pages":"53 - 84"},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803039","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":"The Potential Role of Sulfur during Granulite-facies Metamorphism, Oxidation, and Geochemical Transformation of the Granitoid Lower Crust","authors":"Daniel E. Harlov","doi":"10.1134/S0869591124010041","DOIUrl":"10.1134/S0869591124010041","url":null,"abstract":"<p>The role of S during high-grade metamorphism is a topic that has not garnered much interest in the literature until recently. In this review, the role of S as an active component in high grade hypersaline fluids is reviewed per a series of regional studies involving orthopyroxene-bearing granulite-facies granitoids. These include the Shevaroy Block and Nilgiri Block, southern India; the Bamble Sector, southwest Norway; the Val Strona traverse of the Ivrea-Verbano Zone, northern Italy; and the Lewisian Complex, northwest Scotland. In each these terranes, S-bearing, high-grade, low H₂O activity fluids are conjectured to have been present during granulite-facies metamorphism and to have contributed to the dehydration of the rock, the oxidation state of the rock, and trace element mobility, leaving behind pyrite and/or pyrrhotite as traces of its presence. The various mineral equilibria reactions between the various oxidation states of S in these fluids and the oxide and silicate minerals encountered by the fluid are explored and a coherent framework of interdependent chemical reactions are developed, which describe both oxidation of the rock and the formation of pyrite and pyrrhotite during both peak- and post-peak metamorphism.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 1","pages":"142 - 164"},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803041","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":"Separation of Salts NaCl and CaCl2 in Aqueous-Carbon Dioxide Deep Fluids","authors":"M. V. Ivanov,&nbsp;S. A. Bushmin","doi":"10.1134/S0869591124020036","DOIUrl":"10.1134/S0869591124020036","url":null,"abstract":"<p>The possibility of changing the ratio of the concentrations of NaCl and CaCl₂ salts in fluid phases formed as a result of heterogenization of the H₂O–CO₂–NaCl–CaCl₂ fluid with a decrease in <i>P-T</i> parameters has been studied. A well-known experimental fact regarding the ternary systems H₂O–CO₂–NaCl and H₂O–CO₂–CaCl₂ is the greater tendency of the H₂O–CO₂–CaCl₂ system to separate into coexisting predominantly aqueous-salt and aqueous-carbon dioxide phases compared to the similar system H₂O–CO₂–NaCl. This experimental fact can be interpreted as a greater affinity of NaCl for CO₂ compared to CaCl₂. Using a recently developed numerical thermodynamic model of the H₂O–CO₂–NaCl–CaCl₂ quaternary fluid system, it was possible to identify geologically significant consequences of this difference in the interaction of NaCl and CaCl₂ with CO₂. Multistage heterogenization of the H₂O–CO₂–NaCl–CaCl₂ fluid with a significant decrease in <i>P-T</i> parameters ultimately leads to the formation of aqueous-carbon dioxide fluid phase f2, the salt component of which is significantly enriched in NaCl and depleted in CaCl₂ compared to the initial fluid. The fluid phase f1 formed at each stage of heterogenization has a predominantly water-salt composition with the ratio of the mole fractions of NaCl and CaCl₂ salts, differing little from that in the initial fluid. However, the total mole fraction of salt in the f1 phase, as a rule, significantly exceeds that in the original fluid. The density of phase f1 significantly exceeds the density of phase f2. During the process of multistage heterogenization of the fluid phase f1, there is no formation of a fluid with a significant enrichment of CaCl₂ compared to the initial ratio of the mole fractions of NaCl and CaCl₂. At the same time, successive multiple separation of the f2 phase leads to the enrichment of its salt component in NaCl. Under favorable conditions, this process can lead to the formation of a fluid with almost pure NaCl salt. Changes in the salt composition of the fluid H₂O–CO₂–NaCl–CaCl₂ are considered in application to the evolution of fluid composition along the regressive branch of the <i>P-T</i> trend of HP metamorphism and syngranulite metasomatism in the Lapland granulite belt.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 2","pages":"249 - 257"},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140782044","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":"“In the Wake of a Big Ship”: The Sailing Must Go on!","authors":"L.Ya. Aranovich","doi":"10.1134/S0869591124010107","DOIUrl":"10.1134/S0869591124010107","url":null,"abstract":"","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"32 1","pages":"1 - 1"},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803042","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}