Petrology最新文献

{"title":"Updated COMAGMAT-5: Modeling the Effects of Sulfide Precipitation in Parallel to the Crystallization of Alumino-Chromian Spinel","authors":"A. A. Ariskin, K. A. Bychkov, G. S. Nikolaev, G. S. Barmina","doi":"10.1134/s0869591123050028","DOIUrl":"https://doi.org/10.1134/s0869591123050028","url":null,"abstract":"","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135507358","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":"Variations in the Composition of MORB Chilled Glasses from the Mid-Atlantic Ridge, 12°–31° N: Reflection of Compositional Evolution of Parental Melts and the Influence of a Hydrothermal Component","authors":"S. A. Silantyev, A. I. Buikin, A. R. Tshovrebova, V. V. Shabykova, V. E. Bel’tenev","doi":"10.1134/s0869591123050053","DOIUrl":"https://doi.org/10.1134/s0869591123050053","url":null,"abstract":"","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134931101","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":"Lower Talnakh Type Intrusions of the Norilsk Ore Region","authors":"S. F. Sluzhenikin, K. N. Malitch, M. A. Yudovskaya, D. M. Turovtsev, T. N. Antsiferova, S. K. Mikhalev, I. Yu. Badanina, N. G. Soloshenko","doi":"10.1134/s0869591123050065","DOIUrl":"https://doi.org/10.1134/s0869591123050065","url":null,"abstract":"","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134931114","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":"Petrogenesis of the Changlinggang A-type Syenites in the Western South China Block: Implications for Late Cretaceous Tectonic Evolution of the Neo-Tethys","authors":"Zheng Liu,&nbsp;Guo-Chang Wang,&nbsp;Shu-Cheng Tan,&nbsp;Hao Liu,&nbsp;Mei-Li Li","doi":"10.1134/S0869591123040069","DOIUrl":"10.1134/S0869591123040069","url":null,"abstract":"<p>It is debated whether Cretaceous magmatism and mineralization in southeastern Yunnan (China) resulted from the subduction of Neo-Tethys or Paleo-Pacific lithosphere. To address this problem, we report whole-rock geochemical and Sr–Nd isotopic compositions and zircon U–Pb ages and Lu–Hf isotopic compositions from the Changlinggang syenites in the southeastern Yunnan Sn mineralization belt, western South China Block. LA–ICP–MS zircon U–Pb dating suggests that syenites were emplaced during the Late Cretaceous (79.2 ± 0.5 Ma). They contain nepheline and aegirine, and have high (K₂O + Na₂O) contents (16.0–18.6 wt %), K₂O/Na₂O ratios (0.7–1.7), FeO^T/(FeO^T + MgO) ratios (0.83–0.97), 10⁴ × Ga/Al ratios (2.3–3.7), and (Zr + Nb + Ce + Y) contents (505–2138 ppm), which are typical of A-type granitoids. The samples have slightly more enriched initial Sr–Nd isotopic compositions than the coeval Jiasha gabbros, with (⁸⁷Sr/⁸⁶Sr)_i ratios of 0.7088–0.7101 and ε_Nd(Т) values of –7.5 to –6.6. The geochemical data suggest that the Changlinggang syenites were derived by partial melting of enriched lithospheric mantle that had been metasomatized by subducted-sediment-derived melts, followed by crustal assimilation and fractional crystallization of the partial melt during ascent. These results, along with those of previous studies, indicate that Cretaceous magmatism and mineralization in southeastern Yunnan were emplaced in an extensional setting related to subduction of Neo-Tethys lithosphere. Therefore, we propose that the Neo-Tethyan slab was subducted under the western South China Block during the Late Cretaceous.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"31 4","pages":"440 - 458"},"PeriodicalIF":1.5,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4753425","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":"Thermodynamic Model of the Fluid System H2O–CO2–NaCl–CaCl2 at P-T Parameters of the Middle and Lower Crust","authors":"M. V. Ivanov","doi":"10.1134/S0869591123040045","DOIUrl":"10.1134/S0869591123040045","url":null,"abstract":"<p>Based on the earlier obtained equations of state for the ternary systems H₂O–CO₂–CaCl₂ and H₂O–CO₂–NaCl, an equation of state for the four-component fluid system H₂O–CO₂–NaCl–CaCl₂ is derived in terms of the Gibbs excess free energy. A corresponding numerical thermodynamic model is built. The main part of the numerical parameters of the model coincides with the corresponding parameters of the ternary systems. The NaCl–CaCl₂ interaction parameter was obtained from the experimental liquidus of the salt mixture. Similar to the thermodynamic models for H₂O–CO₂–CaCl₂ and H₂O–CO₂–NaCl, the range of applicability of the model is pressure 1–20 kbar and temperature from 500 to 1400°C. The model makes it possible to predict the physicochemical properties of the fluid involved in most processes of deep petrogenesis: the phase state of the system (homogeneous or multiphase fluid, presence or absence of solid salts), chemical activities of the components, densities of the fluid phases, and concentrations of the components in the coexisting phases. The model was used for a detailed study of the phase state and activity of water on the H₂O–CO₂–salt sections when changing the ratio <span>({{{{x}_{{{text{NaCl}}}}}} mathord{left/ {vphantom {{{{x}_{{{text{NaCl}}}}}} {({{x}_{{{text{NaCl}}}}} + {{x}_{{{text{CaC}}{{{text{l}}}_{{text{2}}}}}}})}}} right. kern-0em} {({{x}_{{{text{NaCl}}}}} + {{x}_{{{text{CaC}}{{{text{l}}}_{{text{2}}}}}}})}})</span> from 1 to 0. Changes in the composition and density of coexisting fluid phases at a constant activity of water and changes in the total composition of the system are studied. A set of phase diagrams on sections H₂O–NaCl–CaCl₂ for different mole fractions of CO₂ is obtained. Pressure dependencies of the maximal activity of water in the field of coexisting unmixable fluid phases are obtained for several salt compositions of the system. Due to removal of restrictions resulting from a smaller number of components in ternary systems, the thermodynamic behavior of systems with a mixed composition of the salt significantly differs from the behavior of those with a single salt component.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"31 4","pages":"413 - 423"},"PeriodicalIF":1.5,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0869591123040045.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4756463","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":"Experimental Investigation into Interaction between Amphibole and Highly Saline H2O–NaCl–KCl Fluid at 750°C, 700 MPa: Implications to Alkaline Metasomatism of Amphibole Rocks","authors":"L. I. Khodorevskaya,&nbsp;D. A. Varlamov,&nbsp;O. G. Safonov","doi":"10.1134/S0869591123040057","DOIUrl":"10.1134/S0869591123040057","url":null,"abstract":"&lt;p&gt;The paper presents experimental data on the interaction of amphibole with NaCl–H&lt;sub&gt;2&lt;/sub&gt;O and (K, Na)Cl–H&lt;sub&gt;2&lt;/sub&gt;O solutions at varying salt content. When interacting with H&lt;sub&gt;2&lt;/sub&gt;O–NaCl fluid, amphibole remains the predominant mineral in all experiments, and the newly formed minerals are Na-phlogopite, plagioclase, and nepheline/sodalite. At &lt;span&gt;({{a}_{{{{{text{H}}}_{{text{2}}}}{text{O}}}}})&lt;/span&gt; &gt; 0.6, the amphibole melts. When amphibole interacts with H&lt;sub&gt;2&lt;/sub&gt;O–NaCl–KCl fluid at &lt;span&gt;({{X}_{{{{{text{H}}}_{2}}{text{O}}}}})&lt;/span&gt; &lt; 0.40 and &lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;KCl&lt;/sub&gt;/(&lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;KCl&lt;/sub&gt; + &lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;NaCl&lt;/sub&gt;) in the fluid, defined as &lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;NaCl&lt;/sub&gt; = 0.506 – 0.84&lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;KCl&lt;/sub&gt;, the amphibole is replaced by the association of nepheline with sodic plagioclase, sodalite, and biotite. At &lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;KCl&lt;/sub&gt;/(&lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;KCl&lt;/sub&gt; + &lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;NaCl&lt;/sub&gt;) &gt; 0.3, nepheline, sodalite, and plagioclase become unstable, K-feldspar is formed, and biotite, clinopyroxene, and amphibole remain stable. At &lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;KCl&lt;/sub&gt;/(&lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;KCl&lt;/sub&gt; + &lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;NaCl&lt;/sub&gt;) &gt; 0.5, the association &lt;i&gt;Cpx + Bt + Kfs + Grt&lt;/i&gt; (grossular–andradite) is stable. Thus, grossular–andradite garnet is an indicator of a high potassium activity in the fluid, whereas nepheline testifies that the sodium activity was high. Na → K exchange is typical of the amphibole and biotite, and Ca → Na exchange occurs in the clinopyroxene, and all of these minerals (but neither nepheline nor garnet) remain generally stable within a wide range of the K/Na ratio in the fluid. Clinopyroxene in the experiments spans Ca–Fe–Mg compositions with a varying, sometimes high, Al content, and the amphiboles belong to the pargasite–hastingsite series. With an increase in &lt;span&gt;({{a}_{{{{{text{H}}}_{{text{2}}}}{text{O}}}}})&lt;/span&gt; (&lt;span&gt;({{X}_{{{{{text{H}}}_{{text{2}}}}{text{O}}}}})&lt;/span&gt; &gt; 0.57), i.e., a decrease in the gross salinity of the fluid, melts are generated, and their composition varies from trachyte to phonolite. An increase in the &lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;KCl&lt;/sub&gt;/(&lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;KCl&lt;/sub&gt; + &lt;i&gt;Х&lt;/i&gt;&lt;sub&gt;NaCl&lt;/sub&gt;) ratio in the fluids leads to a decrease in alumina content of the melts. An increase in the total salinity of the fluid leads to an increase in the content of potassium in the melt and a decrease in the content of chlorine in it. The experiments have shown that interaction between amphibole and fluids containing high NaCl and KCl concentrations results in mineral associations typically produced by alkaline metasomatism of amphibole-bearing rocks and concomitant HCl enrichment in the fluid phase. The substitution of highly saline fluids for highly acidic ones leads to the leaching of Ca, Mg, Fe from the metamorphic rocks, and the transport and redeposition of these components. It follows that significant removal of FeO, MgO, CaO from rocks is sometimes a consequence of the interaction of the host rocks with saline ","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"31 4","pages":"394 - 412"},"PeriodicalIF":1.5,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4757482","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":"New Data on the Rock and Mineral Composition of Kharchinsky and Zarechny Volcanoes, Central Kamchatka Depression: Heterogeneity of the Mantle Source and Peculiarities of Magma Evolution in the Crust","authors":"N. V. Gorbach,&nbsp;N. A. Nekrylov,&nbsp;M. V. Portnyagin,&nbsp;K. Hoernle","doi":"10.1134/S0869591123030050","DOIUrl":"10.1134/S0869591123030050","url":null,"abstract":"<p>Kharchinsky and Zarechny volcanoes and the Kharchinsky Lake zone of monogenic cones are unique eruptive centers of magnesian lavas located above the northern margin of the Pacific plate subducting beneath Kamchatka. This paper presents new geochemical data on the composition of rocks (55 samples) and minerals (over 900 analyses of olivine, pyroxenes, amphibole, and plagioclase) of these centers analyzed by XRF and LA-ICP-MS (rocks) and electron microprobe (minerals). Most of the studied rocks are magnesian (Mg# = 60–75 mol %) medium-K basalts and basaltic andesites. Moderate-magnesian (Mg# = 52–59 mol %) basaltic andesites are present among the monogenic cones of Kharchinsky Lake. The rare rock varieties include the high-K basalts–basaltic andesites of dikes in the center of Kharchinsky volcano and the magnesian andesites (Mg# = 58–61 mol %) of the extrusions of Zarechnу volcano. The distribution of trace-element contents in these samples demonstrates enrichment in large-ion lithophile elements and light REEs at depletion in high field strength elements and heavy REEs, as is typical of arc rocks. The high-K basalts and basaltic andesites show anomalous enrichment in Ba (&gt;1000 ppm), Th (&gt;3.8 ppm), U (&gt;1.8 ppm), Sr (&gt; 800 ppm, Sr/Y &gt; 50), and light REE (La &gt; 20 ppm), and their compositions are close to those of low-Si adakites. The basalts and basaltic andesites contain phenocrysts of high-Mg olivine (up to <i>Fo</i>_92.6) and clinopyroxene (Mg # up to 91 mol %). The rocks show petrographic and geochemical evidence of fractional crystallization, along with the processes of mineral accumulation and magma mixing. Some of the olivine phenocrysts show high NiO contents (up to 5000 ppm) and an elevated Fe/Mn ratio (up to 80), which were interpreted as evidence of the participation of a pyroxenite source in the magma generation processes. The use of the Ca/Fe and Ni/Mg ratios allowed us to distinguish the composition fields and evolution trends of olivine associated with different sources: peridotite and pyroxenite, which were formed by a reaction between mantle-wedge peridotites and high-Si melts of the subducted oceanic crust. The new data are consistent with other lines of evidence of melting of the subducted Pacific plate edge beneath the northern part of the Central Kamchatka Depression at the Kurile–Kamchatka and Aleutian subduction zone junction and testify to a significant heterogeneity of the mantle in this area.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"31 3","pages":"320 - 337"},"PeriodicalIF":1.5,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5088961","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 Origin of Olivine Basalts from Medvezhya Mount (Avachinsky Group of Volcanoes, Kamchatka): The Evidence for Assimilation of Sulfide-Bearing Cumulates","authors":"D. P. Savelyev,&nbsp;N. V. Gorbach,&nbsp;M. V. Portnyagin,&nbsp;V. D. Shcherbakov","doi":"10.1134/S0869591123030074","DOIUrl":"10.1134/S0869591123030074","url":null,"abstract":"<div><p>The role and conditions of liquid immiscibility or crystallization of sulfide phase during evolution of subduction-related magmas remains a debated topic, which bears relevance to the genesis of porphyry copper deposits and evolution of the continental crust. We studied rare volcanic rocks with inclusions of magmatic sulfides in olivine—the basalts of Medvezhya Mount in the Avachinsky group of volcanoes. The rocks belong to primitive (Mg# = 66 mol %) middle-K island-arc olivine basalts. Olivine with normal zoning predominates (~98%) among phenocrysts. The olivine compositions are typical for Kamchatka basalts, except for an unusual trend of increase of MnO content from 0.20 to 0.55 wt % and decrease of Fe/Mn from 60 to 35 with a change of olivine composition from <i>Fo</i>_87.8 to <i>Fo</i>_78.2. Olivine of this group contains numerous inclusions of spinel-group minerals varying in composition from chromium spinel to magnesian magnetite. Olivine phenocrysts with sulfide inclusions are characterized by the absence of or weak reverse zoning and reduced contents of Ca, Ni, Mn, Cr, and Al. The estimated crystallization temperatures are 1036–1241°C for olivine of the prevailing type and 1010–1062°C for sulfide-bearing olivine. The data suggest that crystallization of the main olivine population occurred under relatively shallow conditions and was accompanied by strong magma oxidation. On the contrary, the zoning pattern and compositional features of sulfide-bearing olivine suggest its xenogenic origin and the probable crystallization under deep-crustal conditions from low-temperature water-rich and/or low-Ca magmas. The results obtained confirm the possibility of saturation of oxidized island-arc magmas with sulfide phase at lower crustal conditions, but show that this process is rare and not typical for low-pressure crystallization stage.</p></div>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"31 3","pages":"263 - 278"},"PeriodicalIF":1.5,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5086054","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":"Subduction and Oceanic Magmatism Records in Plutonic Rocks of the Kamchatsky Mys Ophiolite, Eastern Kamchatka","authors":"B. A. Bazylev,&nbsp;M. V. Portnyagin,&nbsp;D. P. Savelyev,&nbsp;G. V. Ledneva,&nbsp;N. N. Kononkova","doi":"10.1134/S0869591123030025","DOIUrl":"10.1134/S0869591123030025","url":null,"abstract":"<p>The paper presents petrographic, mineralogical, and geochemical data on dunites, pyroxenites, peridotites, and gabbroids of the Kamchatsky Mys ophiolite. These data were acquired to distinguish cogenetic assemblages of igneous rocks, gain an insight into their geodynamic settings, and test various criteria of genetic links between the different magmatic rocks of ophiolites. The ultramafic and mafic rocks are shown to belong to two series, which differ in the compositions of the primary minerals, bulk rocks, and estimated trapped melts. The rocks of these series are found out to have been produced by geochemically different melts in different geodynamic settings, and during different episodes of mantle magmatism. The rocks of the high-Ti series (gabbro of the Olenegorsk massif, dunite and melanogabbro xenoliths in them, and vein gabbro in these xenoliths) crystallized from N-MORB melts in an oceanic spreading center. The rocks of the low-Ti series (dunite, pyroxenite, and gabbro veins in the residual spinel peridotites of the Mount Soldatskaya massif, as well as pyroxenite, peridotite, and gabbro alluvium and diluvium in the central and western parts of the peninsula) crystallized from water-rich boninite melts in relation to initial subduction magmatism. Taken into account the absence of boninite lavas from the Kamchatsky Mys ophiolite, the plutonic ultramafic rocks (including the rocks of the veins) might be the only evidence of subduction boninitic magmatism in the ophiolites. It was demonstrated that conclusions about the geodynamic settings of plutonic ultramafic and mafic rocks and recognition of cogenetic relations of these rocks with spatially associated basalts are more reliable when derived from the compositions of the trapped melts, which are estimated from their bulk geochemistry and primary mineral compositions, than when they are based on the mineral compositions only.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"31 3","pages":"338 - 357"},"PeriodicalIF":1.5,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5087076","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":"Magmatism in Kamchatka and the Kurile Islands","authors":"","doi":"10.1134/S0869591123030086","DOIUrl":"10.1134/S0869591123030086","url":null,"abstract":"","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"31 3","pages":"261 - 262"},"PeriodicalIF":1.5,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5088963","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}