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The effects of local variations in conditions on carbon storage and release in the continental mantle

National Science Review 2024年第06期 22-36页

作者： Stephen f.foley Chunfei Chen Dorrit E.Jacob School of Natural Sciences Macquarie University Research School of Earth Sciences Australian National University State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences China University of Geosciences

Recent advances indicate that the amount of carbon released by gradual degassing from the mantle needs to be revised upwards, whereas the carbon supplied by plumes may have been overestimated in the *** in rock types and oxidation state may be very local and exert strong influences on carbon storage and release mechanisms. Deep subduction may be prevented by diapirism in thick sedimentary packages,whereas carbonates in thinner sequences may be subducted. Carbonates stored in the mantle transition zone will melt when they heat up, recognized by coupled stable isotope systems(e.g. Mg, Zn, Ca). There is no single ‘mantle oxygen fugacity’, particularly in the thermal boundary layer(TBL) and lowermost lithosphere, where very local mixtures of rock types coexist. Carbonate-rich melts from either subduction or melting of the uppermost asthenosphere trap carbon by redox freezing or as carbonate-rich dykes in this zone. Deeply derived, reduced melts may form further diamond reservoirs, recognized as polycrystalline diamonds associated with websteritic silicate minerals. Carbon is released by either edge-driven convection,which tears sections of the TBL and lower lithosphere down so that they melt by a mixture of heating and oxidation, or by lateral advection of solids beneath rifts. Both mechanisms operate at steps in lithosphere thickness and result in carbonate-rich melts, explaining the spatial association of craton edges and carbonate-rich magmatism. High-pressure experiments on individual rock types, and increasingly on reactions between rocks and melts, are fine-tuning our understanding of processes and turning up unexpected results that are not seen in studies of single rocks. future research should concentrate on elucidating local variations and integrating these with the interpretation of geophysical signals. Global concepts such as average sediment compositions and a uniform mantle oxidation state are not appropriate for small-scale processes; an increa

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Melting of hydrous pyroxenites with alkali amphiboles in the continental mantle:*** element compositions of melts and minerals

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Geoscience frontiers 2024年第1期15卷 50-68页

作者： Stephen f.foley Isra S.Ezad School of Natural Sciences Macquarie UniversityNorth RydeNew South Wales 2109Australia Research School of Earth Sciences Australian National UniversityCanberraACT 2601Australia

The trace element compositions of melts and minerals from high-pressure experiments on hydrous pyroxenites containing K-richterite are presented. The experiments used mixtures of a third each of the natural minerals clinopyroxene, phlogopite and K-richterite, some with the addition of 5% of an accessory phase ilmenite, rutile or apatite. Although the major element compositions of melts resemble natural lamproites, the trace element contents of most trace elements from the three-mineral mixture are much lower than in lamproites. Apatite is required in the source to provide high abundances of the rare earth elements, and either rutile and/or ilmenite is required to provide the high field strength elements Ti, Nb, Ta, Zr and Hf. Phlogopite controls the high levels of Rb, Cs and *** abundances of trace elements in the various starting mixtures vary strongly because of the use of natural minerals, we calculated mineral/melt partition coefficients (DMin/melt) using mineral modes and melting reactions and present trace element patterns for different degrees of partial melting of hydrous pyroxenites. Rb, Cs and Ba are compatible in phlogopite and the partition coefficient ratio phlogopite/K-richterite is high for Ba (136) and Rb (12). All melts have low contents of most of the first row transition elements, particularly Ni and Cu ((0.1-0.01)×primitive mantle). Nickel has high DMin/melt for all the major minerals (12 for K-richterite, 9.2 for phlogopite and 5.6 for Cpx) and so behaves at least as compatibly as in melting of peridotites. fluorine/chlorine ratios in melts are high and DMin/melt for fluorine decreases in the order apatite (2.2) > phlogopite (1.5) > K-richterite (0.87). The requirement for apatite and at least one Ti-oxide in the source of natural lamproites holds for mica pyroxenites that lack K-richterite. The results are used to model isotopic ageing in hydrous pyroxenite source rocks: phlogopite controls Sr isotopes, so that lamproites with relatively l

关键词： Hydrous pyroxenite Lamproite Trace elements Phlogopite K-richterite Apatite

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Melting of hydrous pyroxenites with alkali amphiboles in the continental mantle:*** relations and major element compositions of melts

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Geoscience frontiers 2022年第4期13卷 48-74页

作者： Stephen f.foley Isra S.Ezad Sieger R.van der Laan Maik Pertermann School of Natural Sciences Macquarie UniversityNorth RydeNew South Wales 2109Australia Research School of Earth Sciences Australian National UniversityCanberraACT 2601Australia Tata Steel Europe Research and DevelopmentIjmuidenThe Netherlands Coos Bay OregonUSA

Melting experiments on ultramafic rocks rich in the hydrous minerals phlogopite or phlogopite+K-rich terite,some including 5%of accessory phases,have been conducted at 15 and 50 *** assemblages represent probable source components that contribute to melts in cratonic regions,but whose melt compositions are poorly known.A main series of starting compositions based on MARID xenoliths consisted of a third each of clinopyroxene(CPX),phlogopite(PHL)and K-richterite(KR)with or without 5%ilmenite,rutile or *** experiments were run without KR and with higher proportions of accessory *** traps were used at near-solidus temperatures to facilitate accurate analysis of wellquenched melts,for which reversal experiments demonstrate *** show that KR melts rapidly and completely within 50°C of the solidus,so that melts reflect the composition of the amphibole and its melting *** have high SiO_(2) and especially K_(2)O but low CaO and Al_(2)O_(3) relative to basaltic melts produced from peridotites at similar *** have no counterparts amongst natural rocks,but most closely resemble leucite lamproites at 15 *** and PHL melt incongruently to form olivine(OL)and CPX at 15 kbar,promoting SiO2 contents of the melt,whereas orthopyroxene OPX is increasingly stable at lower lithosphere pressures,leading to an increase in Mg O and decrease in SiO_(2) in melts,which resemble olivine *** of mica pyroxenites without KR are richer in CaO and Al_(2)O_(3) and do not resemble *** experiments show that low CaO and Al_(2)O_(3) in igneous rocks is not necessarily a sign of a depleted peridotite *** phases produce melts exceptionally rich in P_(2)O_(5) or TiO_(2) depending on the phases present and are unlike any melts seen at the Earth’s surface,but may be important agents of metasomatism seen in *** addition of the 5%accessory phases ilmenite,rutile or apatite result in melting temper

关键词： Hydrous pyroxenite Experimental petrology Mantle melts Phlogopite Lamproite Mantle metasomatism

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Oxidization of the mantle caused by sediment recycling may contribute to the formation of iron-rich mantle melts

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Science Bulletin 2020年第7期65卷 519-521,M0003页

作者： Detao He Yongsheng Liu Chunfei Chen Stephen f.foley Mihai N.Ducea State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China ARC Centre of Excellence for Core to Crust fluid Systems Department of Earth and Planetary SciencesMacquarie UniversityNorth RydeNew South Wales 2109Australia Department of Geosciences University of ArizonaTucsonAZ 85721USA faculty of Geology and Geophysics University of BucharestBucharest 010041Romania

Mantle-derived primary magmas generally have feOtot contents of about 11 wt%.However,some primary melts show extremely high feO^tot(>13 wt%)with high MgO(>12 wt%)(ferropicrite)[1].Considering the influence of chemical and mineral compositions of the mantle source on melt compositions,it has been argued that ferropicrites may be near-primary partial melts of pyroxenite formed in the convecting mantle[2–4],whereas others favor an origin by partial melting of an iron-rich peridotitic mantle source[5,6].Melting experiments have shown that melting conditions such as pressure and temperature can strongly influence the melt compositions,such that ferropicrites may be generated by partial melting of an olivine-dominated mantle source at^5 GPa[5].Some ferropicrites seem to be more oxidized than other magmas,as suggested from the Panzhihua intrusions in the Emeishan large igneous province[7],which may imply melting of a more oxidized mantle ***,Johnston and Stout[8]showed that oxygen fugacity exerts great control on the compositions and stabilities of Cr-fe-rich minerals,and may therefore significantly affect mantle-derived melt *** oxygen fugacity(fO2)and solidus temperature of the mantle can be dramatically affected by recycled sedimentary *** raises the question as to whether sedimentary carbonate recycling could have indirectly contributed to the formation of iron-rich melts in the mantle.

关键词：硫化物矿床单斜辉石矿物组合碳酸岩镁铁矿氧逸度辉石岩再循环

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The largest negative carbon isotope excursions in Neoproterozoic carbonates caused by recycled carbonatite volcanic ash

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Science Bulletin 2021年第18期66卷 1925-1931,M0004页

作者： Yongsheng Liu Wei Chen Stephen f.foley Yan’an Shen Chunfei Chen Junhua Li Xiaobin Ou Detao He Qinglai feng Jie Lin State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China Department of Earth and Environmental Sciences Macquarie UniversityNorth RydeNSW 2109Australia School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China

The late Ediacaran Shuram Excursion(SE)records the most prominent negativeδ^(13)C excursions(δ^(13)C=-12‰)during Earth’s *** has been hypothesized to have resulted from oxidation of dissolved organic matter,diagenetic or authigenic ***,the origin of the SE remains enigmatic;current models face challenges regarding the significant amount of atmospheric oxygen needed to balance such extensive oxidation and sustained inputs of light carbon with extremely negative C isotope ***,we show that the Doushantuo formation at the Jiulongwan section in South China,a key stratum recording the SE event,contains mineralogical and geochemical signatures related to igneous *** the occurrence of ankerite,feldspar,moissanite and euhedral quartz in the SE samples and the relatively consistent Ce anomalies of carbonate and O isotopes of quartz indicate a contribution from an igneous *** particular,the SE samples have trace element and C isotope compositions similar to those of recycled carbonatites formed by decarbonation and melting of sedimentary carbonate *** observations suggest that the deep cycle of ancient carbonate rocks,which were subjected to decarbonation during subduction,melting and eruption related to the breakup of the Rodinia supercontinent,contributed to the *** igneous model for the SE may provide a connection between the deep and shallow carbon cycles of the Earth.

关键词： Shuram Excursion Negativeδ^(13)C excursions Doushantuo Igneous processes Decarbonation Recycled carbonatite

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火山磷供给推动中国北方中生代陆地生物繁荣

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Science Bulletin 2023年第12期68卷 1317-1326,M0004页

作者：马超汤艳杰 Ross N.Mitchell 李永飞孙守亮朱吉昌 Stephen f.foley 王敏叶辰阳英基丰朱日祥 State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Shenyang Center of China Geological Survey Shenyang 110034China Australia School of Natural Sciences Macquarie UniversityNorth Ryde NSW 2109Australia Research School of Earth Sciences Australian National UniversityCanberra ACT 2601Australia Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China Center for Excellence in Life and Paleoenvironment Chinese Academy of SciencesBeijing 100044China

中国北方中生代热河生物群的生物量和生物多样性超过了同时期的其他陆地生物群,早白垩世热河生物群的辐射可能是对华北克拉通峰期破坏过程的响应,然而,克拉通破坏的深部过程和陆地生物群演化之间的内在联系尚不清楚。磷是生命所必需的... 详细信息

中国北方中生代热河生物群的生物量和生物多样性超过了同时期的其他陆地生物群,早白垩世热河生物群的辐射可能是对华北克拉通峰期破坏过程的响应,然而,克拉通破坏的深部过程和陆地生物群演化之间的内在联系尚不清楚。磷是生命所必需的营养元素,火山产物(包括熔岩和火山碎屑岩)中的磷可通过风化作用供给陆地生态系统。中国北方中生代连续的火山-沉积序列记录了火山磷供给、生物生产力和物种丰度的变化,为研究地球深部过程、火山作用与陆地生物群的协同演化提供了关键证据.火山磷供给与生物群演化之间的耦合关系表明,在华北克拉通峰期破坏期间,大量火山产物的风化作用为陆地生态系统供给了丰富的营养物质,创造了有利于热河生物群繁荣的陆地环境。与华北克拉通破坏初期相对应的侏罗纪燕辽生物群的演化也反映了上述火山-生物之间的耦合机制。

关键词：风化作用华北克拉通火山碎屑岩陆地生物火山作用陆地环境地球深部沉积序列

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西澳白榴石钾镁煌斑岩白榴石中铝尖晶石包体的成因

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宝石和宝石学杂志(中英文) 1987年第1期 9-15页

作者： A.L.Jaques S.f.foley 喻学惠

西澳西金伯利地区,白榴石钾镁煌斑岩的白榴石斑晶（和假白榴石）中,出现小的（通常小于20μm）铝尖晶石（亚铁尖晶石-铁尖品石）包体.这种尖晶石与基质中共存的钛铁镁铬铁矿显著不同,后者很象岩石中其它贫铝的铁镁相.白榴石中类似的铝... 详细信息

西澳西金伯利地区,白榴石钾镁煌斑岩的白榴石斑晶（和假白榴石）中,出现小的（通常小于20μm）铝尖晶石（亚铁尖晶石-铁尖品石）包体.这种尖晶石与基质中共存的钛铁镁铬铁矿显著不同,后者很象岩石中其它贫铝的铁镁相.白榴石中类似的铝尖晶石包体,还在另一种钾镁煌斑岩-高斯伯格（Gaussberg）橄榄白榴石岩——于1个大气压下的实验中出现.基于矿物学和实验证据,这种过碱性火山岩的白榴石中铝尖晶石包体的形成被解释为在过饱和条件下,原始的包含Mg、Al和fe;的固溶体从非理想配比的白榴石中的出溶作用.

关键词：白榴石铝矿物尖晶石宝石包体钾镁煌斑岩金云火山岩西澳

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火山磷供给推动中国北方中生代陆地生物繁荣（英文）

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Science Bulletin 2023年第12期 1317-1326页

作者：马超汤艳杰 Ross N.Mitchell 李永飞孙守亮朱吉昌 Stephen f.foley 王敏叶辰阳英基丰朱日祥 State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Shenyang Center of China Geological Survey Australia School of Natural Sciences Macquarie University Research School of Earth Sciences Australian National University Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences

中国北方中生代热河生物群的生物量和生物多样性超过了同时期的其他陆地生物群.早白垩世热河生物群的辐射可能是对华北克拉通峰期破坏过程的响应.然而,克拉通破坏的深部过程和陆地生物群演化之间的内在联系尚不清楚.磷是生命所必需的营...

中国北方中生代热河生物群的生物量和生物多样性超过了同时期的其他陆地生物群.早白垩世热河生物群的辐射可能是对华北克拉通峰期破坏过程的响应.然而,克拉通破坏的深部过程和陆地生物群演化之间的内在联系尚不清楚.磷是生命所必需的营养元素,火山产物(包括熔岩和火山碎屑岩)中的磷可通过风化作用供给陆地生态系统.中国北方中生代连续的火山-沉积序列记录了火山磷供给、生物生产力和物种丰度的变化,为研究地球深部过程、火山作用与陆地生物群的协同演化提供了关键证据.火山磷供给与生物群演化之间的耦合关系表明,在华北克拉通峰期破坏期间,大量火山产物的风化作用为陆地生态系统供给了丰富的营养物质,创造了有利于热河生物群繁荣的陆地环境.与华北克拉通破坏初期相对应的侏罗纪燕辽生物群的演化也反映了上述火山-生物之间的耦合机制.

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通过数控电磁振动台进行全程环模试验

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导弹与航天运载技术 1980年第3期 99-108页

作者： D.Hlnckley f.foley P.Moseley W.Ross 冯振兴

前言决定导弹制导精度与构件可靠性,过去一直是根据飞行数据。最近,考虑到一些经济原因,飞行试验项目受限,以致要求补充一些定性的飞行数据。为此,提出一些实验计划,对获得这些数据的方法进行评定。这些计划中有一个计划已被证明是成功... 详细信息

前言决定导弹制导精度与构件可靠性,过去一直是根据飞行数据。最近,考虑到一些经济原因,飞行试验项目受限,以致要求补充一些定性的飞行数据。为此,提出一些实验计划,对获得这些数据的方法进行评定。这些计划中有一个计划已被证明是成功的,这就是让试件承受一个已录制好的模拟飞行环境。助推阶段的冲击和振动数据

关键词：飞行数据系统传递函数时间历程电磁振动磁盘计算机外围设备导弹制导系统激振结构振动闭环控制系统反馈控制系统数据调用全程终端显示中文自校英文

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再循环沉积碳酸盐岩引发的Ca-Zn-Sr同位素协同变化：来自内蒙古达里湖玄武岩的记录（英文）

再循环沉积碳酸盐岩引发的Ca-Zn-Sr同位素协同变化：来自内蒙古达...

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作者： Detao He Yongsheng Liu frédéric Moynier Stephen f.foley Chunfei Chen Yangtao Zhu Ganglan Zhang

The deep carbon cycle has emerged as a new research field in the past twenty years, and requires tracers to understanding carbon sequestration and mobility in the deep Earth. Recently, stable isotopes of metals have been developed as a novel method to trace the deep carbon cycle, and magnesium and zinc have been successfully applied. However,

关键词：协同变化碳酸盐岩再循环 cycle 同位素内蒙古 Ca-Zn-Sr 玄武岩

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