Journal of Mineralogical and Petrological Sciences最新文献

{"title":"Experimental investigation of the simultaneous partitioning of divalent cations between löllingite or safflorite and 2 mol/L aqueous chloride solutions under supercritical conditions","authors":"E. Uchida, Y. Sugino, H. Yokoyama","doi":"10.2465/jmps.200114","DOIUrl":"https://doi.org/10.2465/jmps.200114","url":null,"abstract":"In order to elucidate partition behavior of divalent cations between minerals and aqueous chloride solutions under supercritical conditions of fluid phase, we conducted experiments of the simultaneous partitioning of Ni2+, Mg2+, Co2+, Zn2+, Fe2+, and Mn2+ between löllingite (FeAs2) or safflorite (CoAs2) and 2 mol/L aqueous chloride solutions under the conditions of 500 and 600 °C, 100 MPa. Natural löllingite and safflorite were used as starting materials. The bulk partition coefficient (KPB) for the cation partition reactions can be expressed as follows:","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42402222","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":"Plagioclase–hosted melt inclusions as indicators of inhibited rhyolitic melt beneath a mafic volcano: a case study of the Izu–Omuroyama monogenetic volcano, Japan","authors":"Risako Hatada, H. Ishibashi, Yukiko Suwa, Yusuke Suzuki, N. Hokanishi, A. Yasuda","doi":"10.2465/jmps.190724","DOIUrl":"https://doi.org/10.2465/jmps.190724","url":null,"abstract":"We conducted textural and chemical analyses of melt inclusions and their host plagioclase crystals in the scoria of the Izu – Omuroyama monogenetic volcano, erupted at ~ 4 ka in the Higashi – Izu monogenetic volcanic fi eld, Japan. The groundmass melt was andesitic with ~ 59 – 61 wt% SiO 2 , and it contained abundant microphenocrysts of olivine and plagioclase. In contrast, ~ 59% of the plagioclase – hosted melt inclusions have rhyolitic compositions with ~ 70 – 75 wt% SiO 2 . The host plagioclase phenocrysts have cores with An# of 44.7 ± 4.2 [An# = 100Ca/(Ca + Na) in mol] and rims with An# of 68 – 78, and the calcic rims have compositions similar to the microphenocrysts. The cores of the host plagioclase phenocrysts have FeO* and K 2 O contents that are in equilibrium with the rhyolitic melt inclusions. Using the plagioclase – melt geohygrometers and assuming temper-atures of 790 – 850 °C, we estimated the H 2 O contents of the rhyolitic melt inclusions to be ~ 4.4 – 10.2 wt%, indicating H 2 O – saturation depths of >4.5 km. Our results suggest that an inhibited reservoir of plagioclase – bearing rhyolitic melt existed beneath the monogenetic volcano at the time of the scoria eruption, which was ~ 800 years earlier than the fi rst rhyolitic eruption in the volcanic fi eld. Plagioclase content in the silicic reservoir is estimated to be less than 35.8%, suggesting the magma was eruptible. Our results demonstrate the potential usefulness of plagioclase – hosted melt inclusions for indicating the existence of such an inhibited silicic magma.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42743088","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":"Geochemistry and magmatic zircon U–Pb dating of amphibolite blocks in the Omi serpentinite mélange, north central Japan: Possible subduction of the Cambrian oceanic crust","authors":"Y. Ichiyama, Takahito Koshiba, Hisatoshi Ito, A. Tamura","doi":"10.2465/jmps.191205","DOIUrl":"https://doi.org/10.2465/jmps.191205","url":null,"abstract":"Early Paleozoic serpentinite melanges in Japan preserve the oldest high – P metamorphic rocks in the circum – Paci fi c orogenic belt. To understand the tectonic regime at the subduction initiation of the proto – Japan convergent plate boundary, whole – rock geochemistry, and zircon U – Pb geochronology were investigated for amphibolite blocks in the Omi serpentinite mélange, central Japan. The studied amphibolites from two di ff erent localities have the mineral assemblage of albite + clinozoisite + amphibole ± rutile ± titanite, which characterize epidote – amphibolite facies metamorphism. Whole – rock trace element concentrations of the amphibolites sug-gest that gabbroic protoliths formed possibly in an oceanic setting. The zircon U – Pb weighted mean ages obtained from two amphibolite samples indicate that the protolith was formed in the Cambrian. The protolith ages of the studied amphibolites are comparable with those of reported Early Paleozoic ophiolite and high – pressure rocks in Paleozoic serpentinite mélanges in Japan. This fact implies that the young hot oceanic crust was subducting into the East Asian convergent plate margin during the Cambrian.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47471483","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":"Assimilation and fractional crystallization of Sanukitic high–Mg andesite–derived magmas, Kyushu Island, southwest Japan: An example of the Cretaceous Shaku–dake diorite body","authors":"K. Eshima, M. Owada, A. Kamei","doi":"10.2465/jmps.191209","DOIUrl":"https://doi.org/10.2465/jmps.191209","url":null,"abstract":"The Cretaceous granitoid batholith is characterized by sporadically occurring small mafic bodies. Some of these mafic bodies show high–Mg diorite (HMD) compositions derived from a high–Mg andesite (HMA) magma. One of the mafic bodies, the Shaku–dake body, can be divide into two groups: Two–pyroxene diorite (TPD), diorite (Do), porphyritic fine–grained tonalite (PFT), and clinopyroxene granodiorite (CG) belong to the Group– 1, but hornblende–biotite granodiorite (HBG) and fine–grained biotite granite (FBG) can be found in the Group– 2. The Group–1 is influenced by the assimilation and fractional crystallization process during the ascent and emplacement of magma, whereas the Group–2 changes its whole–rock compositions via fractional crystallization. Discrimination diagrams of HMA indicate that the TPD shows geochemical signatures similar to those of the Sanukitic HMA, where the TPD is defined as Sanukitoid. On the other hand, the Do is plotted as the composition range of island arc calc–alkaline basalts and tholeiite. The Cretaceous magma activities in northern Kyushu were led by the highly thermal structure of the wedge mantle at that time, it was the primary heat source of the voluminous igneous activities during the Cretaceous in Southwest Japan and the Korean Peninsula.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"115 1","pages":"332-347"},"PeriodicalIF":0.7,"publicationDate":"2020-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43701050","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":"Structure changes of nanocrystalline mackinawite under hydrothermal conditions","authors":"Y. Sano, A. Kyono, Y. Yoneda, Noriko Isaka, S. Takagi, Gen–ichiro Yamamoto","doi":"10.2465/jmps.190903","DOIUrl":"https://doi.org/10.2465/jmps.190903","url":null,"abstract":"We investigated the structure changes and phase transformation from nanocrystalline mackinawite to pyrite using hydrothermal experiments, synchrotron X–ray diffraction (XRD) technique, atomic Pair Distribution Function (PDF) method, Extended X–ray Absorption Fine Structure (EXAFS) analysis, and transmission electron microscopic (TEM) observation. The first hydrothermal ageing experiment was performed by heating the nanocrystalline mackinawite at 120 °C for 12 h. The nanocrystalline mackinawite remained essentially unchanged for 12 h. The d001 and FWHM values of XRD peaks decreased for the first 2 h and subsequently maintained almost constant. There was no linear relationship between lattice parameters and hydrothermal heating time. The crystallite size quickly increased by the heating of 2 h, leading to the increase of crystallinity and appearance of the medium–range order in the nanocrystalline mackinawite. The nanocrystalline mackinawite preferentially grew in the horizontal direction along the sheet structure. The Fe atoms were distributed in the tetrahedral sites with a site occupancy of approximately 80%. The pre–edge peak energy of Fe K–edge suggested that about 10% Fe3+ was included in the nanocrystalline mackinawite to compensate the charge deficiency of Fe2+. The second hydrothermal ageing experiment was performed by heating the nanocrystalline mackinawite at 120 °C under the presence of elemental sulfur for 24 h. The nanocrystalline mackinawite persisted up to 8 h of heating time. Thereafter, pyrite and greigite instead of the nanocrystalline mackinawite appeared. Finally pyrite became dominant. The d001 and lattice parameters of nanocrystalline mackinawite varied significantly compared with those heated under the absence of elemental sulfur. The pre–edge peak energy indicated that the Fe2+ was oxidized to Fe3+ by elemental sulfur acting as the oxidant during the phase transformation from nanocrystalline mackinawite to greigite. In the phase transformation to pyrite, on the other hand, the Fe3+ was reduced to Fe2+ by sulfur in mackinawite and greigite acting as the reductant. The EXAFS analysis revealed that the second peak from the Fe–Fe interaction appeared at the heating time of 2 h, implying the formation of sheet structure consisting of edge–sharing FeS4 tetrahedra. Intensity of the second shell peak from the Fe–Fe interaction reduced after the heating time of 8 h. Instead, new peaks corresponding to the Fe–S and Fe–Fe interaction appeared after the heating time of 12 h. This result was strongly associated with formation of the disulfide bonds (S–S bonds) in pyrite. Consequently, the elemental sulfur can be recognized as one of the most important factors to promote the phase transformation from mackinawite to pyrite in the reducing lake and marine sediments.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"115 1","pages":"261-275"},"PeriodicalIF":0.7,"publicationDate":"2020-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48075757","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":"Serpentinite enigma of the Rakhabdev lineament in western India: Origin, deformation characterization and tectonic implications","authors":"Dyuti Prakash Sarkar, J. Ando, K. Das, A. Chattopadhyay, G. Ghosh, K. Shimizu, H. Ohfuji","doi":"10.2465/jmps.191016","DOIUrl":"https://doi.org/10.2465/jmps.191016","url":null,"abstract":"Serpentine mineralogy controls fault rheology in the ocean and continental rift settings to subduction settings and hence can be used to discern the paleo deformational conditions. The Rakhabdev lineament from Rajasthan, India, provides a unique opportunity to understand its tectonic evolution inferred from the deformation microstructures. However, the complexity of surrounding calc – silicate rocks had resulted in a long – driven debate on the origins of these serpentinite rocks. The source rocks of the serpentinites also cannot be determined pre-viously due to complete serpentinization and metasomatism rendering complete alteration of the source rocks. In this study, the serpentinite mineral was analyzed using Raman spectroscopy to accurately characterize its molecular structure. The presence of the antigorite – variety of serpentine mineral indicate towards the origin of Rakhabdev serpentinites in the upper mantle condition. The antigorite serpentinite of Rakhabdev is a hydration product of mantle materials showing high Mg# values obtained from EPMA data. The microstructural and EBSD analysis also indicates two stages of deformation, with deformation of antigorite at upper mantle conditions, followed by their shallow crustal carbonate metasomatism and subsequent deformation of the carbo-nates, with later stage calcite vein intrusion. This resulted in the appearance of antigorite in contact with calcite, dolomite, talc, tremolite, and chlorite. The exhumation of mantle wedge antigorite serpentinite is, therefore, indicating a paleo – subduction zone culminating in a crustal – scale collision boundary expressed as arcuate dis-continuous bodies forming the Rakhabdev lineament.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2465/jmps.191016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49533135","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":"Zirconium in rutile thermometry from garnet granulites of the Jijal complex of Kohistan arc, NW Himalaya","authors":"C. Nakazawa, H. Rehman, H. Yamamoto, T. Zafar","doi":"10.2465/jmps.191226","DOIUrl":"https://doi.org/10.2465/jmps.191226","url":null,"abstract":"Zirconium in rutile thermometry data from the garnet granulites of the Jijal Complex of Kohistan arc, NW Himalaya are presented in this study. The garnet granulites are composed of garnet, clinopyroxene, plagioclase, quartz, symplectic augite/amphibole, rutile, ilmenite, zircon, and magnetite. Rutile grains range in size from 50 to 350 µm, occur as inclusion in garnet, clinopyroxene, and in plagioclase as well as along the grain boundaries. In total 19 rutile grains were analyzed for Zr contents using an X – ray Analytical Microscope (XGT – 5000) by HORIBA. The Zr contents among the analyzed grains ranged between 450 and 920 ppm, where the analyzed spots with lower Zr contents (containing SiO 2 or Fe 2 O 3 ), indicating some in fl uence of host silicate or ilmenite, were removed from results. At the individual grain scale, most of the rutile grains exhibited homogeneous chemical compositions, regardless of their textural a ffi nity. Temperature values, based on zirconium in rutile thermometry, ranged between 792 and 849 °C for rutile enclosed in garnet, 771 and 851 °C for rutile in clinopyroxene, and 784 and 862 °C for rutile in plagioclase whereas matrix rutile grains showed T values between 820 and 847 °C. Using the pressure – dependent zirconium in rutile thermometry, the T values were slightly lower (±50 to 100 °C). The maximum temperature values were consistent with the temperature data obtained from the conventional thermobarometry results ( P ; 1.2 ± 0.2 GPa and T ; 818 ± 80 °C) whereas the lower values, likely, re fl ect chemical resetting of the analyzed grains during later stages of retrogression.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2465/jmps.191226","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42519317","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":"Revisiting Pb isotope signatures of Ni–Fe alloy hosted by antigorite serpentinite from the Josephine Ophiolite, USA","authors":"Mayu Kakefuda, T. Tsujimori, K. Yamashita, Y. Iizuka, K. Flores","doi":"10.2465/jmps.190731a","DOIUrl":"https://doi.org/10.2465/jmps.190731a","url":null,"abstract":"*Department of Earth Science, Tohoku University, Sendai 980–8578, Japan **Center for Northeast Asian Studies, Tohoku University, Sendai 980–8576, Japan ***Department of Earth and Planetary Sciences, American Museum of Natural History, New York, NY 10024–5192, USA †Graduate School of Natural Science and Technology, Okayama University, Okayama 700–8530, Japan ‡Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan §Department of Earth and Environmental Sciences, Brooklyn College of the City University of New York, Brooklyn, NY 11210, USA","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"115 1","pages":"21-28"},"PeriodicalIF":0.7,"publicationDate":"2020-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2465/jmps.190731a","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41848815","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":"Three types of greenstone from the Hidaka belt, Hokkaido, Japan: Insights into geodynamic setting of northeastern margin of the Eurasian plate in the Paleogene","authors":"T. Yamasaki, F. Nanayama","doi":"10.2465/jmps.190617","DOIUrl":"https://doi.org/10.2465/jmps.190617","url":null,"abstract":"The Hidaka belt in Central Hokkaido, Japan, consists of an early Paleogene subduction complex, referred to as the Hidaka Supergroup, dominated by clastic rocks. The southern area of the Hidaka Supergroup is referred to as the Nakanogawa Group, which gradually leads to the high – temperature Hidaka metamorphic belt in the western part. We collected 17 samples of greenstone from the entire Hidaka belt and examined their whole – rock major and trace element geochemistry. Including those described in previous reports, three distinct types of greenstone exist in the Hidaka belt. Type 1 greenstone is an ocean island basalt – type greenstone. The multi – element and rare earth element (REE) patterns for this type of greenstone show a steep slope up to the left, with Ti/V > 62 and Zr/Nb < 15. Type 2 greenstone is a mid – ocean ridge basalt (MORB) – type greenstone that shows relatively fl at chondrite – normalized REE patterns and a gentle slope up to the left on the normal – MORB – normalized multi – element patterns with Ti/V = 26 – 53 and Zr/Nb = 21 – 117. Type 3 greenstone shows multi – element and REE patterns similar to those of Type 1, but with a clear relative depletion of Nb, Ta, and Ti. In addition, its Ti – V relations are similar to those of Type 2 greenstone. Type 1 and Type 3 greenstones occur only in the Nakanogawa Group. Type 2 greenstone is mostly distributed in the northern the Hidaka Supergroup. Type 1 and Type 3 greenstones were generated by igneous activity on the Izanagi Plate, which was being subducted during the formation of the subduction complex of the Hidaka belt. Type 2 greenstone is interpreted as a product of a spreading axis that was active during the formation of the same subduction complex. Whereas Type 2 greenstone has been regarded as having a typical MORB – like geochemical signature, our results show slightly di ff erent, Indian Ocean MORB – type trace element patterns. These geochemical signatures are di ff erent than those of the amphibolites in the Hidaka metamorphic belt. The protolith of the amphibolite is not equivalent to the Type 2 greenstones and is probably an accreted fragment of an older oceanic plate. Type 2 greenstone was presumably generated from upper mantle with an Indian mantle – like geochemical signature during the Izanagi – Paci fi c ridge subduction on the western margins of the Paci fi c Ocean around 48 Ma.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42468859","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":"Attenuated total reflection infrared (ATR–IR) spectroscopy of antigorite, chrysotile, and lizardite","authors":"I. Sakaguchi, Y. Kouketsu, K. Michibayashi, S. Wallis","doi":"10.2465/jmps.190807","DOIUrl":"https://doi.org/10.2465/jmps.190807","url":null,"abstract":"Attenuated total re fl ection infrared (ATR – IR) spectroscopy allows measurements to be made directly from the surface of one – sided, diamond polished thin sections of geological samples. This method greatly reduces the sample preparation time when compared to other IR spectroscopy methods and opens the possibility of using infrared spectroscopy to study thin – section scale microstructures. ATR – IR spectroscopy of antigorite, chrysotile, and lizardite in samples from the Mt. Shiraga serpentinite body, central Shikoku, SW Japan, reveals clear spectral di ff erences in the 650 – 1250 cm − 1 region associated with the vibration of the Si – O bonds in SiO 4 tetrahedra and in the 3300 – 3750 cm − 1 region associated with the vibration of the O – H bond in MgO 2 (OH) 4 octahedra. A data – processing algorithm developed in this study allows the absorbance intensity and wavenumber of a particular absorbance peak to be used to create serpentine mineral phase maps based on the highest intensity Si – O absorbance bands for antigorite, chrysotile, and lizardite. Our methodology can be used to map serpentinite microstructures in thin sections illustrating the potential of ATR – IR as a relatively un – explored analytical tool in petrological studies. A combination of ATR – IR and electron microprobe data shows that for antigorite the wavenumber of the O – H absorbance band is correlated with the Fe content. Metamorphic reactions of serpentine minerals play a key role in the hydrodynamics of the earth ’ s lithosphere, and the new information on serpentine mineral hydroxyl group behavior obtained by applying the technique outlined in this study are of great potential interest to researchers in a wide range of di ff erent fi elds.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68829398","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}