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Detrital zircon U-Pb age perspective on the sediment provenance and its geological significance of sandstones in the Lamandau region, SW Borneo, Indonesia

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Journal of Oceanology and Limnology 2022年第2期40卷 496-514页

作者： Shuang LI saijun sun Xiaoyong YANG Weidong sun Zhaojian WU Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration College of Earth SciencesGuilin University of TechnologyGuilin 541004China Center of Deep Sea Research Institute of OceanologyCenter for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China China Coal Geology Group Limited Beijing 100040China

The Southwest Borneo(SW Borneo)block belongs to sundaland and is the oldest continental fragment of Borneo that is believed to derive from the Gondwana *** U-Pb isotopic dating ages of 113 detrital zircons from sandstones of the Ketapang Complex in SW Borneo range from 3298 Ma to 78 Ma,and show six major age populations:2476-2344 Ma,2016-1831 Ma,1296-759 Ma,455-406 Ma,262-210 Ma,and 187-78 *** youngest age of these detrital zircons is 78 Ma,indicating that the maximum depositional age of the sandstones is ***-Late Cretaceous detrital zircons are interpreted as having been derived from the nearby Schwaner Mountains and the Permian-Triassic tin belt granitoids in Southeast Asia(SE Asia).Archean-Carboniferous detrital zircons have a continental Gondwana provenance,with their age spectra similar to those of northwestern Australia,indicating that these zircons could be derived from the orogenic belts and cratons in northwestern and central *** provenance of these detrital zircons in this study indicates the SW Borneo block was located on the northwestern margin of Australia during the Paleozoic,in the region of the Banda *** Borneo rifted from Australia and moved northward in the Early Jurassic,and this block was added to sundaland in the Early *** Luconia-Dangerous Grounds continental fragment derived from East Asia collided with SW Borneo after subduction in the Cretaceous,which induced the widespread magmatism in the Schwaner Mountains in SW Borneo.

关键词： detrital zircon U-Pb dating provenance Southwest Borneo(SW Borneo) sundaland

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Experimental constraints on trace element partitioning between coesite and hydrous silicate melt at 5 GPa and 1500-1750℃

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Science China Earth Sciences 2021年第7期64卷 1171-1183页

作者： Wei YAN Xi LIU saijun sun Weidong sun Dan WU Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education of ChinaBeijing 100871China School of Earth and Space Sciences Peking UniversityBeijing 100871China Center of Deep Sea Research Institute of OceanographyChinese Academy of SciencesQingdao 266071China Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

Trace element partitioning between coesite and hydrous silicate melt has been investigated at 5 GPa and 1500-1750℃.High-P experiments successfully produced large coesite crystals in equilibrium with large silicate melt pools(plus kyanite and corundum crystals in some cases).Scanning electron microscopy and micro-Raman spectroscopy were employed to characterize the phases and the ***-dispersive electron microprobe analyses were performed to quantify conventional major elements,and laser ablation-inductively coupled plasma-mass spectrometry analyses were successfully conducted to quantify trace ***,high-P partition coefficients were obtained for 33 *** general coesite is a very pure *** a few possible exceptions like Sc,Ti,and V,nearly all other trace elements are incompatible in ***,the partitioning behaviors of nearly all trace elements except some 4+cations cannot be readily described by the lattice strain model,presumably implying a minor role for the cation size in the trace-element *** our experimental results with the results in the literature,some T and P effects on the element partitioning behavior have been observed:T seemingly has different effects on different trace elements,but P might negatively correlate with the partition coefficients in all *** to its large modal fraction in some subducted materials such as the continental crustal material,coesite might play an important role in the distributions of some trace elements,Ti for example.

关键词： Partition coefficients High-P experiments LA-ICP-MS Coesite Hydrous silicate melt Temperature and pressure dependence

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High oxygen fugacity magma:implication for the destruction of the North China Craton

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Acta Geochimica 2020年第2期39卷 161-171页

作者： Zhekun Zhang Mingxing Ling Lipeng Zhang saijun sun Weidong sun CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China State Key Laboratory of Isotope Geochemistry.Guangzhou Institute of Geochemistry Chinese Academy of Sciences.Guangzhou 510640China Center of Deep Sea Research Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100094China

The mechanism of lithospheric removal and destruction of the North China Craton(NCC)has been hotly debated for *** is now generally accepted that the subduction of the(Paleo)-Pacific plate played an important role in this ***,how the plate subduction contributed to the craton destruction remains *** we report high oxygen fugacity(fO2)characteristics of the Yunmengshan granite,e.g.,hematitemagnetite intergrowth supported by zircon Ce^4+/Ce^3+ratios and apatite Mn oxygen fugacity *** fO2 magmas are widely discovered in Late Mesozoic(160-130 Ma)adakitic rocks in central *** origin of high fO2 magma is likely related to the input of the"oxidized mantle components",which shows a dose connection between plate subduction and destruction of the *** research area is^1500 km away from the current Pacific subduction *** the back-arc extension of Japan Sea since the Cretaceous,this distance may be shortened to^800 km,which is still too far for normal plate *** subduction is the best candidate that was responsible for the large scale magmatism and the destruction of the *** slab-derived fluids and/or melts were liberated into an overlying mantle wedge and modified the lithospheric *** of the subducting plate induced the large-scale upwelling of asthenospheric mantle and triggered the formation of extensive high fO2 intraplate magmas.

关键词： High oxygen fugacity Decratonization North China Craton Plate subduction

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Plate convergence in the Indo-Pacific region

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Journal of Oceanology and Limnology 2020年第4期38卷 1008-1017页

作者： sun Weidong ZHANG Lipeng LIAO Renqiang sun saijun LI Congying LIU He Center of Deep Sea Research Institute of OceanologyCenter for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China

The Indo-Pacific convergence region is the best target to solve the teo remaining challenges of the plate tectonics theory,i.e.,subduction initiation and the driving force of plate *** studies proposed that the Izu-Bonin subduction initiation belongs to spontaneous initiation,which implies that it started from extension,followed by low angle *** geodynamic modeling suggests that the initiation of plate subduction likely occurred along a transform fault,which put the young spreading ridge in direct contact with old oceanic ***,however,does not explain the simultaneous subduction initiation in the west Pacific region in the ***,the subduction initiations in the Izu-BoninMariana,the Aleutian,and the Tonga-Kermadec trenches are associated with oceanic crusts of different ages,yet they occurred at roughly the same time,suggesting that they were all triggered by a maj or change in the Pacific ***,low angle subduction induces compression rather than extension,which requires external compression *** that the famous Hawaiian-Emperor bending occurred roughly at the same time with the onset of westward subductions in the west Pacific,we propose that these Cenozoic subductions were initiated by the steering of the Pacific plate,which are classified as induced *** subduction initiation usually occurs in young ocean basins,forming single-track *** closure s of Neo-Tethys Oceans were likely triggered by plume s in the south,forming northward ***,the Indian plate kept on moving northward more than 50 Ma after the collision between the Indian and Eurasian continents and the break-off of the subducted oceanic slab attached to *** strongly suggests that slab pull is not the main driving force of plate tectonics,whereas slab sliding is.

关键词： plate tectonics subduction initiation drifting history Pacific plate Indian plate slab sliding

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Adakitic rocks associated with the Shilu copper–molybdenum deposit in the Yangchun Basin,South China,and their tectonic implications

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Acta Geochimica 2017年第2期36卷 132-150页

作者： Lipeng Zhang Yongbin Hu Jinlong Liang Trevor Ireland Youliang Chen Rongqing Zhang saijun sun Weidong sun CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China University of Chinese Academy of Sciences Beijing 100094 China Department of Geochemistry Chengdu University of Technology Chengdu 610059 China Research School of Earth Sciences The Australian National University Bldg 61 Mills Road Acton ACT Canberra ACT 0200 Australia Center of Deep Sea Research Institute of Oceanography Chinese Academy of Sciences Qingdao 266071 China CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Science Beijing 100101 China

South China is famous for the extensive magmatism and polymetallic mineralization that took place there in the Mesozoic. Shilu is a large porphyry–skarn Cu–Mo deposit in the Yangchun Basin, South China. The lithology of the Shilu intrusion is granodiorite and quartz diorite, both of which are high-K calc-alkaline series, with high Sr([400 ppm) content along with low Y and Yb contents. Most of the samples have characteristics of adakite except for a few samples that have slightly higher Y and Yb contents, which may be plausibly explained by crustal contamination. Laser Ablation Inductively Coupled Plasma Mass Spectrometry zircon U–Pb dating revealed ages between 106.6 ± 1.3 and 103.9 ± 0.5 Ma, with multiple magmatic pulses. Molybdenite Re–Os isochron age of 102.2 ± 2.9 Ma(MSWD = 9.4) was determined, which is identical to the youngest zircon U–Pb age(103.9 ± 0.5 Ma) within *** Shilu intrusion has high oxygen fugacity as indicated by high zircon Ce^(4+)/Ce^(3+) and Eu_N/Eu_N* ratios. Considering the geochemical characteristics(high Sr, and low Y and Yb contents), high oxygen fugacity, and copper mineralization of the Shilu intrusion, it was most likely formed by partial melting of a subducted young oceanic slab. Whole-rock Sr–Nd isotope-, zircon Hf isotope-, and whole-rock trace element analyses show that Shilu adakitic magmas may have interacted with type II enriched mantle and/or crustal materials during ascent. South China was affected by the Pacific tectonic regime to the east and the Neo-Tethys tectonic regime to the south in the Cretaceous. Based on the Pacific Plate drifting and rotation history, it is hard to explain how the Pacific Plate would have subducted and melted, forming adakitic rocks in the Shilu region. Considering the tectonic history of Southeast Asia and the South China Sea, the Neo-Tethys trench should have been much closer to the South China Block in the Cretaceous, and thus have had a greater impact on the South China Block. Based on the

关键词： Shilu deposit Adakitic rocks Cretaceous Neo-Tethys South China

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An emerging plume head interacting with the Hawaiian plume tail

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The Innovation 2023年第2期4卷 41-46,40页

作者： Lipeng Zhang Zebin Cao Robert E.Zartman Congying Li saijun sun Lijun Liu Weidong sun Center of Deep Sea Research Institute of OceanologyChinese Academy of SciencesQingdao 266071China Deep-Sea Multidisciplinary Research Center Laoshan LaboratoryQingdao 266237China Department of Geology University of Illinois at Urbana-ChampaignUrbanaIL 61820USA Laboratory for Marine Geology Laoshan LaboratoryQingdao 266237China University of the Chinese Academy of Sciences Beijing 100049China

The Hawaiian-Emperor seamount chain has shown two subparallel geographical and geochemical volcanic trends,Loa and Kea,since-5 Ma,for which numerous models have been proposed that usually involve a single mantle plume sampling different compositional sources of the deep or shallow ***,both the dramatically increased eruption rate of the Hawaiian hotspot since-5 Ma and the nearly simultaneous southward bending of the Hawaiian chain remain unexplained.

关键词： volcanic shallow mantle

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皖南乌溪斑岩型金矿床赋矿侵入岩体的岩石地球化学及年代学研究

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大地构造与成矿学 2015年第1期39卷 153-166页

作者：李双孙赛军杨晓勇孙卫东中国科学院广州地球化学研究所矿物学与成矿学重点实验室广东广州510640 中国科学院大学北京100049 中国科学技术大学地球和空间科学学院安徽合肥230026

皖南乌溪金矿床位于安徽省泾县榔桥镇,介于长江中下游多金属成矿带与华南成矿带之间,属于江南造山带。本文对乌溪含矿花岗斑岩钻孔样品以及地表出露的岩体开展锆石LA-ICP-MS定年,分别获得139.6±1.7 Ma(ZK7301)、137.3±1.6 Ma(ZK7001)... 详细信息

皖南乌溪金矿床位于安徽省泾县榔桥镇,介于长江中下游多金属成矿带与华南成矿带之间,属于江南造山带。本文对乌溪含矿花岗斑岩钻孔样品以及地表出露的岩体开展锆石LA-ICP-MS定年,分别获得139.6±1.7 Ma(ZK7301)、137.3±1.6 Ma(ZK7001)、137.3±1.1 Ma(10WX-1)三组年龄,表明钻孔中的斑岩和地表出露的岩体年龄一致,形成于燕山期早白垩世。同时该岩体主要受断裂构造控制,在成岩过程中受到少量新太古代地壳物质的混染。岩体中发育大量的隐爆角砾岩以及矿化角砾,表明乌溪矿床的矿体与花岗斑岩岩体可能同时形成。乌溪花岗斑岩元素分析结果表明该岩体属过铝质,具有富集大离子亲石元素,亏损高场强元素以及重稀土元素的特征,其中轻重稀土元素分异显著,且具有轻微Eu负异常。乌溪花岗斑岩中的磷灰石与长江系列花岗岩的磷灰石稀土特征相似,表明该区磷灰石的稀土元素特征受到幔源岩浆流体活动的影响;同时因为磷灰石δEu值较高,说明岩浆在演化过程中处于相对开放的构造环境并且具有较高的氧逸度条件。锆石氧逸度计算表明乌溪花岗斑岩在形成过程中具有较高的氧逸度,有利于Cu、Au等成矿元素富集沉淀成矿。同时乌溪花岗斑岩的形成与古太平洋板块对欧亚大陆的俯冲碰撞作用密切相关。乌溪金矿床的矿体中Pb、Zn元素出现明显的矿化,Au元素含量相对大陆地壳略高。乌溪金矿矿区内发育的大量断裂构造为成矿流体提供了充分的运移通道,有利于金矿的形成;进一步的野外勘测以及地球化学工作对乌溪矿区探矿和找矿工作具有重要的指示意义。

关键词：锆石U-Pb年龄元素地球化学特征磷灰石锆石氧逸度乌溪

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锑的地球化学性质与华南锑矿带成因初探

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岩石学报 2020年第1期36卷 44-54页

作者：张天羽李聪颖孙赛军郝锡荦中国科学院海洋研究所深海研究中心青岛266071 青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室青岛266237 中国科学院海洋大科学研究中心青岛266071 自然资源部天然气水合物重点实验室青岛海洋地质研究所青岛266071

锑属亲铜元素,易与硫结合。锑在地核(0.14×10^-6)、地幔(0.006×10^-6)和地壳(0.02×10^-6)中的丰度均很低,而在黑色页岩(5.0×10^-6)中明显富集。锑是一种典型的低温成矿元素。我国华南地区低温成矿域拥有世界60%的锑探明储量。研究... 详细信息

锑属亲铜元素,易与硫结合。锑在地核(0.14×10^-6)、地幔(0.006×10^-6)和地壳(0.02×10^-6)中的丰度均很低,而在黑色页岩(5.0×10^-6)中明显富集。锑是一种典型的低温成矿元素。我国华南地区低温成矿域拥有世界60%的锑探明储量。研究结果显示锑的成矿主要经历两阶段富集过程:一是与风化和沉积作用有关的表生过程;二是地球内部热驱动过程。寒武纪时华南位于赤道附近,受冈瓦纳大陆的造山带的影响,是全球地表风化最强烈的地区之一。在新元古代氧化事件的驱动下,锑在表生风化过程中被氧化为更易迁移的水溶性的SbO3^-。因埃迪卡拉生物群所产生的有机质,有利于萃取水体中的锑并沉淀在还原性沉积物(黑色页岩)中。华南中生代岩浆活动烘烤表层富锑的寒武纪黑色页岩,产生的成矿流体向上迁移,淋滤黑色页岩中的Sb或与黑色页岩变质脱水或熔融产生成矿流体混合;而后搬运至远离岩体的有利位置沉淀,最终形成大规模的华南锑矿带。

关键词：锑锑的地球化学寒武纪黑色页岩华南锑矿

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钛的地球化学性质与成矿

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岩石学报 2020年第1期36卷 68-76页

作者：孙赛军廖仁强丛亚楠隋清霖李爱中国科学院海洋研究所深海研究中心青岛266071 青岛海洋科学与技术试点国家实验室海洋地质过程与环境功能实验室青岛266237 内蒙古自治区矿产实验研究所呼和浩特010031 青岛大学数据科学与软件工程学院青岛266071

钛由于其高强度和抗腐蚀性特征,在航空航天、医药、手机等领域得到越来越广泛的应用,是二十世纪的战略金属元素。在自然界中,钛铁矿、钛磁铁矿和金红石是最具经济价值的含钛矿物。钛最初被认为是变质过程中最不活泼的金属元素之一,随着... 详细信息

钛由于其高强度和抗腐蚀性特征,在航空航天、医药、手机等领域得到越来越广泛的应用,是二十世纪的战略金属元素。在自然界中,钛铁矿、钛磁铁矿和金红石是最具经济价值的含钛矿物。钛最初被认为是变质过程中最不活泼的金属元素之一,随着越来越多的证据显示钛可以在特定条件下进入变质热液流体中发生活动迁移。高压变质脉体中金红石和磷灰石作为共生矿物存在,这可能为富F溶液对钛迁移富集的影响,当氟磷灰石从富F流体中结晶沉淀时K2TiF6络合物分解,钛在其中的溶解度降低进而结晶沉淀出金红石,而这一富集迁移沉淀机制很可能是变质型金红石矿床变质富集的机制。在岩浆矿床中,钛常作为伴生元素赋存于磁铁矿床中。一般认为部分熔融程度、挥发分含量和成矿岩浆温度等决定了含钛矿或高钛岩体的形成,本文认为富金红石的再循环洋壳或者富钛沉积矿床重熔是岩浆型钛矿床的重要成矿物质来源。沉积型钛矿床的形成与区域地质、地理和水动力学有关,它们常在被动大陆边缘,以高风化、高品位钛源岩为后盾通过风化、剥蚀和海侵等主要形成在沿海岸带特别是南北纬30°低纬度地区。总之富钛源区、起源深度、部分熔融温度和程度、陆壳混染程度、挥发分、流体成分、风化剥蚀能力等决定了钛矿化成功与否。

关键词：钛矿床钛磁铁矿金红石钛活动性钛富集与成矿

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西藏那曲中酸性火山岩的锆石U-Pb年龄、Hf同位素和地球化学特征及岩石成因

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岩石学报 2015年第7期31卷 2063-2077页

作者：孙赛军张丽鹏丁兴孙卫东张兆荣中国科学院广州地球化学研究所、矿物学与成矿学重点实验室广州510640 中国科学院大学北京100049 中国科学院广州地球化学研究所、同位素地球化学国家重点实验室广州510640 中国科学院青藏高原地球科学卓越创新中心北京100101 福建省闽西地质大队厦门361004

西藏拉萨地块北部广泛分布着中生代岩浆岩,然其岩浆源区和岩石成因仍存在多种争议。本文对那曲地区中酸性火山岩进行了全岩地球化学、LA-ICPMS锆石U-Pb年龄和Hf同位素的研究。结果显示：1）那曲地区粗面安山岩的时代为111.9±1.2Ma,英... 详细信息

西藏拉萨地块北部广泛分布着中生代岩浆岩,然其岩浆源区和岩石成因仍存在多种争议。本文对那曲地区中酸性火山岩进行了全岩地球化学、LA-ICPMS锆石U-Pb年龄和Hf同位素的研究。结果显示：1）那曲地区粗面安山岩的时代为111.9±1.2Ma,英安岩为109.2±3.5Ma,二者在误差范围内一致,均为早白垩世;2）火山岩Si O2为51.88%~74.62%,具有低MgO含量（0.37%~3.65%）,并且样品大多显示较低的Mg#（16~40）值。岩石为过铝质特征,在原始地幔标准化蛛网图上显示Th-U正异常,而Nb、Ta、P、Ti等负异常。稀土元素整体表现为轻稀土富集、重稀土亏损的趋势,且轻重稀土分异程度强,（La/Yb）N=8.79~14.85,具负Eu异常（δEu=0.46）;3）那曲中酸性火山岩体的锆石Ti温度计为720℃左右。锆石Ce（Ⅳ）/Ce（Ⅲ）〈300,普遍在2~250之间,指示岩浆具有低的氧逸度;4）那曲中酸性火山岩锆石εHf（t）值大多集中在-7.7~0.5之间,对应的Hf模式年龄（tCDM）为918~1336Ma。综合以上岩石学和地球化学数据,认为那曲中酸性火山岩为壳幔混合成因,可能是在班公湖-怒江洋壳南向俯冲引起板片断离背景下,羌塘与拉萨地块碰撞引起地壳加厚继而发生部分熔融,并加入了少量的受早期流体交代的安多微陆块古老岩石圈地幔物质,且其熔融产物经历了不同程度的分离结晶作用。

关键词：火山岩 LA-ICPMS锆石U-Pb定年那曲拉萨地块北部

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