首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 125 毫秒
1.
对黑龙江东部海音山林场地区花岗闪长岩开展锆石U-Pb年代学和岩石地球化学研究,以确定其形成时代,源区性质和构造背景。花岗闪长岩锆石年代学研究表明其形成于早白垩世(128±1 Ma和126±1 Ma)。岩石地球化学研究显示,花岗闪长岩富SiO_2(67.31%~70.19%)、Al_2O_3(13.72%~15.52%)、K_2O(3.01%~4.06%)、Na_2O(2.92%~3.81%),贫CaO(2.03%~3.04%)、FeO和MgO,属于高钾钙碱性岩系列。富集大离子亲石元素(如Rb、Ba、K)、轻稀土元素(LREE),相对亏损高场强元素(如Nb、Ta、Ti、P)。岩浆源区为镁铁质下地壳的部分熔融所形成。结合区域同时代岩浆岩的研究成果,认为海音山花岗闪长岩形成于古太平洋板块向欧亚大陆俯冲下的火山弧环境。  相似文献   

2.
桂东北大宁岩体锆石SHRIMP年代学和地球化学研究   总被引:7,自引:1,他引:6       下载免费PDF全文
大宁岩体位于扬子板块与华夏板块结合带,岩性组合为二长闪长岩-花岗闪长岩-二长花岗岩-钾长花岗岩.岩体中广泛存在壳幔混合包体.本文利用锆石sHRIMPU-Pb法,获得大宁岩体成岩年龄上限为(419.1±6.4)Ma(MSWD=1.03),属加里东晚期.岩体的地球化学研究显示,大宁岩体属弱过铝高钾钙碱性岩石,富大离子亲石元素和轻稀土,显Nb、Ba、Sr、Eu组合异常.岩石具有较高的I_(Sr)值(0.7112~0.7196),较低的εNd(t)值(-6.77~-7.53)和T_(DM)值(1.40~1.71Ga).结合邻区加里东花岗岩壳幔混合特征,本文认为,大宁岩体为幔源岩浆底侵诱发的下地壳变砂屑岩部分熔融形成,形成过程中有显著的幔源组分加入.  相似文献   

3.
闻爽  李碧乐  李立宝  王斌 《地球科学》2013,38(2):305-315
南泉眼闪长岩是兰家矽卡岩型金矿的成矿岩体,研究程度极低.通过岩石地球化学和LA-ICP-MSU-Pb年代学研究,讨论了岩石成因、来源和构造背景.研究表明,南泉眼闪长岩为准铝质的钙碱性岩石;岩石明显富集大离子亲石元素(如Rb、K、Sr)、活泼的不相容元素(如Th、U)和轻稀土元素,相对亏损高场强元素(如Nb、Ta、Ti、P)和重稀土元素,具有明显的负Eu异常,Nb/Ta、La/Nb、Th/La比值显示岩石具壳源特征,Al2O3+MgO+FeOt图解显示岩浆具弧型活动大陆边缘特征.闪长岩岩浆锆石LA-ICP-MSU-Pb加权平均年龄为170.21±0.73Ma(MSWD=0.14);谐和年龄值为170.21±0.39Ma(MSWD=0.018),为中侏罗世.成岩构造背景为燕山早期太平洋板块俯冲引起大陆弧伸展和岩石圈减薄,软流圈物质上涌、底侵提供热动力,不成熟下地壳物质部分熔融形成南泉眼闪长岩.  相似文献   

4.
高景刚 《地质与勘探》2014,50(6):1007-1014
对西天山可可萨拉铜铁钼多金属矿区的石英闪长岩开展了岩石地球化学和定年工作。岩石地球化学特征表明,石英闪长岩体具有较高的Si O2、Al(Al2O3=14.13%~15.10%)和碱总量,富Na贫K,属准铝-弱过铝质岩石。微量元素和稀土元素分析结果显示,本区岩体具有高的LREE/HREE和LILE/HFSE比值,以富集大离子亲石元素(K、Rb、Ba、Th),而相对亏损高场强元素(Zr、Hf、Y、Yb),与陆壳区(同碰撞花岗岩和后碰撞)花岗岩类似。石英闪长岩的锆石SHRIMP U-Pb测年结果表明,石英闪长岩的形成年龄为365.3±2.8Ma,MSWD=1.08,指示其形成于晚泥盆世。地球化学和铅同位素特征暗示形成岩体的岩浆是地壳部分熔融形成,并混有少量的幔源物质,具有混源花岗岩的特点。结合邻区岩浆岩的特征及其时代,石英闪长岩形成于碰撞构造事件,处于碰撞后期的隆升阶段。  相似文献   

5.
本文对青海南山构造带西段黑马河花岗杂岩体中的石英闪长岩和花岗闪长岩以及花岗闪长岩中的暗色微粒包体进行了详细的岩石学、岩石地球化学和LA-ICP-MS锆石U-Pb年代学研究。结果表明,花岗闪长岩及暗色微粒包体的结晶年龄分别为244.4±1.1 Ma和243.0±1.2 Ma,表明岩体形成于中三叠世早期。石英闪长岩和花岗闪长岩为准铝质高钾钙碱性系列,暗色微粒包体为高钾钙碱性—钾玄岩系列,稀土元素配分曲线均具有轻重稀土明显分异的右倾特征,具弱负Eu异常(δEu=0.65~0.83),富集大离子亲石元素(Cs、Rb、Th、K)和Pb,亏损高场强元素(Nb、Ta、Ti)和P、Ba负异常。岩相学和岩石地球化学特征指示黑马河花岗杂岩体具壳幔岩浆混合特征,形成于活动大陆边缘的俯冲环境,石英闪长岩为受俯冲流体交代的地幔楔部分熔融产生的基性岩浆演化的产物,花岗闪长岩则源自壳源岩浆与少量幔源岩浆的混合。黑马河花岗杂岩体是中三叠世早期宗务隆洋向南俯冲消减的岩浆记录。  相似文献   

6.
利用锆石SHRIMP U-Pb法对乌拉特中旗乌兰地区花岗闪长岩进行年龄测试,得到的两个花岗闪长岩样品中锆石的加权平均年龄分别为(322.1±3.4)Ma和(323.4±3.4)Ma,为早石炭世。岩石地球化学及同位素地质年代学研究显示该花岗闪长岩为具有埃达克岩性质的I型花岗岩类,属准铝质-过铝质高钾钙碱性系列;富集Rb,Ba,Sr等大离子亲石元素和Th,U,Nd,Zr等高场强元素;为轻稀土富集型,轻、重稀土高度分异,轻稀土发生明显的分馏作用,铕异常不明显。岩体形成于活动大陆边缘同碰撞构造环境,是残留洋壳部分熔融所形成的基性岩浆与由古老片麻岩基底部分熔融所形成的中酸性岩浆发生混合作用的产物。  相似文献   

7.
安徽铜陵沙滩脚岩体年代学及地球化学特征   总被引:2,自引:0,他引:2  
沙滩脚岩体位于铜陵矿集区东南部,主体为花岗闪长岩,锆石LA-ICP-MS UPb同位素测年结果表明,岩石侵位时代为141.4 Ma土1.1 Ma,属早白垩世,与铜陵地区其它岩体形成年代范围一致.沙滩脚花岗闪长岩的ω(SiO2)在62.06%~65.53%之间、ω(Al2O3)为16.05%~17.06%,Na2O/K2O比值均大于1(1.24~2.34),其属于高钾钙碱性系列.岩石稀土元素含量高,富集轻稀土和大离子亲石元素,亏损高场强元素,同时具有高Sr、低Y从而高Sr/Y比值(47.43~137.50)的特征,类似埃达克质岩石,暗示其岩浆形成于较高的压力下,为加厚的下地壳部分熔融的产物.  相似文献   

8.
安徽狮子山矿田白芒山岩体地球化学特征及成因机制   总被引:3,自引:0,他引:3  
白芒山岩体主要由辉石闪长岩组成,通过岩石学和地球化学的研究,岩石属富碱高钾钙碱性系列,为准铝质(ACNK=0.63~0.72),富含大离子亲石元素(如Ba、Sr)和轻稀土元素,高场强元素(如Nb、Ta、Ti)强烈亏损,Sr-Nd同位素具有EMI型特征。在区域拉张—伸展构造域中,由EMI型富集地幔物质上涌熔融下地壳,发生了结晶分并作用形成。  相似文献   

9.
都兰热水地区位于东昆仑造山带东段,发育着大量花岗岩岩石组合,主要岩石类型为二长花岗岩和花岗闪长岩,本文报道了对都兰热水地区二长花岗岩和花岗闪长岩的地球化学、LA-ICP-MS锆石U-Pb定年的研究结果,为建立完善的年代学格架和构造演化提供了新资料。锆石U-Pb同位素定年研究表明东昆仑东段都兰热水地区的二长花岗岩和花岗闪长岩的结晶侵位时代分别是232.4±1.3 Ma、230.8±1.1 Ma,属中三叠世花岗岩浆作用的产物。岩矿特征和岩石地球化学特征显示二长花岗岩和花岗闪长岩属高钾钙碱性I型花岗岩,具较高的K_2O含量(2.2%~4.74%);铝饱和指数A/CNK值都小于1.1,显示准铝质特征;P_2O_5与SiO_2之间存在明显的负相关性,还表现出富集轻稀土元素、大离子亲石元素(如K、Rb、La),亏损重稀土元素和高场强元素(如Nb、Ta、Ti、P)及Eu负异常特征。结合前人区域地质研究,我们认为东昆仑东段都兰热水地区花岗岩岩石组合是受幔源岩浆的底侵作用导致下地壳部分熔融而形成,幔源岩浆与壳源岩浆发生不同比例混合,并在岩浆演化过程中发生了一定的分离结晶作用。晚二叠世阿尼玛卿洋向东昆仑板块俯冲,直至中三叠世都兰热水地区仍处于洋壳俯冲而产生的火山弧环境,二长花岗岩和花岗闪长岩就是这一阶段的典型产物。  相似文献   

10.
东昆仑中灶火地区的石英闪长岩—花岗闪长岩—二长花岗岩具有连续的成分变化。岩石具有中等到高的Si O_2含量(58.15%~71.12%),适度的高铝和全碱含量,为中—高钾钙碱性的准铝质Ⅰ型花岗岩。岩石相对富集大离子亲石元素和轻稀土元素,并亏损高场强元素,显示出弧岩浆岩的一般地球化学特征。锆石地质年代学分析获得石英闪长岩和花岗闪长岩的锆石结晶年龄约为243Ma,表明本文研究的花岗岩类为中三叠世岩浆岩。结合地质、地球化学研究,这套花岗岩形成于陆缘弧环境,是古特提斯洋俯冲晚期的岩浆记录。其成因为俯冲动力学背景下,幔源岩浆的底侵作用导致下地壳部分熔融,随后壳源熔体与幔源熔体发生不同程度的混合形成母岩浆,又经历了较高程度的结晶分异形成石英闪长岩—花岗闪长岩—二长花岗岩序列。  相似文献   

11.
新疆西准噶尔地区克拉玛依花岗质岩体中发育大量闪长质微粒包体,并形成有岩浆混合成因的岩浆混合岩——石英闪长岩。包体成分主要为闪长质,显微镜下具有岩浆岩结构,岩浆混合特征十分明显,如:针状磷灰石,角闪石包裹辉石残晶,长石斑晶的溶蚀环带等特征。岩体中寄主岩石、岩浆混合岩、闪长质微粒包体、闪长玢岩脉分别代表岩浆混合演化过程中两端元岩浆按不同比例混合的产物。在岩石地球化学方面,包体与寄主岩石的主要氧化物之间具有良好的线性关系,寄主岩石和包体的稀土元素配分曲线和微量元素蛛网图形态相似;各种地球化学元素参数特征显示,寄主岩石与包体在岩石形成过程中发生过成分交换及均一化。特征元素比值及同位素等特征表明,闪长质包体的端元岩浆可能为幔源基性岩浆,寄主岩石的端元岩浆可能是以壳源为主的酸性岩浆。岩石地球化学特征进一步佐证了该区岩浆混合作用的存在,同时也暗示岩浆混合作用可能是新疆北部后碰撞过程中重要的岩浆活动形式。  相似文献   

12.
The Sausfjellet pluton is made up of two intrusive units emplaced into high-grade metamorphic rocks of the Helgeland Nappe Complex of the Uppermost Allochthon in the Norwegian Caledonides. The eastern part of the pluton intruded marble and less voluminous calc-silicate and pelitic rocks. The western half is hosted predominantly by semi-pelitic migmatite with intercalated marble. Remelting of the migmatite during pluton emplacement occurred in a thermal aureole as much as 1000 m wide. The early gabbroic unit forms the southeastern part of the body; it consists of hornblende-bearing to hornblende-rich gabbro and diorite which is thought to have crystallized from an H2O-rich andesitic parental magma. The younger dioritic unit underlies the central and western parts of the pluton, as well as a zone as much as 200 m wide that separates the rest of the pluton from its host rocks (herein the “annular zone”). The interior or central zone of the dioritic unit is pyroxene diorite that is locally interlayered with anorthosite. The western and annular zones are, by comparison, mineralogically heterogeneous. They range from diorite to quartz monzonite and from biotite-bearing two- and three-pyroxene assemblages to biotite–hornblende assemblages. Neither rock type nor mafic assemblage is correlated with position in the pluton or proximity to a contact. Stoped blocks of a distinctive coarse-grained diorite, as well as pyroxene-rich calc-silicates, are present in the gabbroic unit and the central zone of the dioritic unit. The few stoped blocks observed in the western zone of the dioritic unit are predominantly quartz-rich gneiss. Chemical variation in the central zone of the dioritic unit is interpreted to result from accumulation of pyroxenes+plagioclase from an H2O-poor andesitic parent. These rocks have approximately constant δ18O of +6.6±0.2‰ and lack evidence of in situ assimilation. Heterogeneities in the western and annular zones of the dioritic unit are reflected in variable, anomalously enriched incompatible element contents and in δ18O, which ranges from +6.7‰ to +8.6‰. Petrologic models indicate that the magma parental to the central zone could also be parental to the western and annular zones. If so, evolution of the western and annular zone magma was by crystal accumulation and assimilation of metapelitic host rocks. As much as 20% of the mass of the western and annular zones can be ascribed to assimilated material, which apparently entered the magma by stoping. Therefore, the asymmetrical zoning of the pluton is due to differences in host rock compositions and the relative ability of the magma to assimilate its host rocks.  相似文献   

13.
李勇  张士贞  李奋其  秦雅东 《地球科学》2020,45(8):2846-2856
目前关于拉萨地块西段狮泉河地区中生代岩浆岩的报道相对较少,限制了对该地区中生代岩浆作用的认识.对狮泉河地区石英闪长岩和闪长质包体的锆石U-Pb年龄、岩石学特征与元素地球化学进行了研究.结果显示,寄主石英闪长岩的年龄为161.1±1.7 Ma,闪长质包体的年龄为159.8±1.6 Ma和157.0±1.3 Ma,两者为同期形成.寄主石英闪长岩为I型准铝质中钾-高钾钙碱性系列岩石,具有富集大离子亲石元素、亏损高场强元素的特征.闪长质包体为准铝质中钾-高钾钙碱性系列岩石.岩石学、地球化学特征研究表明,该套岩石可能与中侏罗世班公湖-怒江特提斯洋南向俯冲有关,班公湖-怒江特提斯洋南向俯冲引起幔源物质发生熔融,上涌的幔源岩浆与拉萨地块古老基底重熔形成的酸性岩浆混合,形成了含闪长质包体的晚侏罗世岩体.   相似文献   

14.
河南省安林矽卡岩型铁矿的成岩时代和成矿物质来源探讨   总被引:4,自引:1,他引:3  
陈艳  张招崇  朱江 《岩石学报》2014,30(5):1307-1321
位于华北克拉通中部的河南省安林铁矿是典型的邯邢式矽卡岩型铁矿,矿体产于闪长质岩石和中奥陶统灰岩的接触带。LA-ICPMS锆石U-Pb定年结果表明安林闪长岩体的侵位年龄为123.38±0.81Ma,略晚于华北克拉通东部地区的含矿岩体,形成于岩石圈大规模减薄伸展时期。但其中含有古老的锆石说明岩浆经历了地壳的混染。闪长质岩石具有相对低SiO2、高Mg#、高碱,富集Ba、Sr和LREE大离子亲石元素,亏损Nb、Ti、Ta等高场强元素的特点,暗示了其形成于岩石圈地幔。岩相学特征以及Harker图解指示了岩浆经历了较强的分离结晶作用,因此推断安林闪长岩可能是软流圈地幔上涌导致富集的岩石圈地幔发生部分熔融形成原始的辉长质岩浆在上升过程中或岩浆房中发生了以铁镁矿物为主的分离结晶作用,同时受到地壳物质的混染的结果。安林地区矿石具有和闪长岩体相似的稀土元素地球化学特征,反映铁的成矿作用与岩浆作用密切相关。矿床中闪长岩体、矽卡岩、矿石和碳酸盐围岩的主量元素对比研究表明钠交代作用引起Na、K、Fe、Si等元素在各岩类间的迁移,其中迁移出的铁为成矿提供了物质基础。安林地区初始岩浆富含水,分离结晶作用使残留岩浆水饱和而发生出溶;且岩浆在演化过程中受到区内膏盐层和碳酸盐地层的混染,促进了岩浆中流体的出溶并使出溶的流体富含Cl-,为有利于铁质活化的富Cl-岩浆流体的形成创造了条件。  相似文献   

15.
宝坛地区透闪石化镁铁质岩石成因的地质地球化学证据   总被引:7,自引:2,他引:5  
宝坛地区呈岩脉状或岩席状侵入于四堡群变质地层之中的透闪石化镁铁质岩石包括堆积的超镁铁质岩和分异的闪长岩,其岩石类型为透闪石化辉石岩、辉橄岵、辉长岵、辉绿岵及闪长岵等。该镁铁质-闪长质岩石以富集轻稀土和大离子新石元素、亏损高场强元素(Nb、Ta)为特征;除堆积成因的超镁铁质岩石外,透闪石化镁铁质岩石及其分异的闪长岵的MgO为4.45% ̄7.96%,是镁铁质岩浆经结晶分异(辉石、橄榄石)作用的产物。  相似文献   

16.
The Tigalak intrusion is a dominantly dioritic layered body, about 80 km2 in area, which ranges in composition from norite to granodiorite. Local areas of the layered rocks display upward fractionation from norite to ferrodiorite. Periodic reversals of mineral composition trends record the emplacement of less fractionated dioritic magma. Heterogeneous mixtures of dioritic and granodioritic rocks occur widely in mappable lenses and layers that alternate up section and along the strike with more uniformly layered rocks. In these mixtures, chilled dioritic pillows occur abundantly in a hybrid cumulate matrix of granodiorite to diorite composition. Cross-cutting granodioritic dikes grade upward into stratigraphically-bound lensoid masses of the hybrid cumulates. It appears that the hybrid rocks formed as a result of the emplacement of the granodioritic magma through lower cumulates into the dioritic magma chamber and that the dioritic pillows represent chilled bodies of Ferich dioritic magma that commingled with cooler granodioritic magma and settled to the floor of the Tigalak magma chamber. The restricted distribution of these mixtures of hybrid cumulates and chilled pillows indicates that mixing between granodioritic and dioritic liquids was limited in time and lateral extent. Periodic injections of granodioritic liquids may have collected as a separate layer below the roof of the magma chamber and above dioritic magma.  相似文献   

17.
Late Mesozoic dioritic and quartz dioritic plutons are widespread in the Daye region, eastern Yangtze craton, eastern China. Detailed geochronological, geochemical, and Sr–Nd isotopic studies have been undertaken for most of these plutons, in an attempt to provide a comprehensive understanding in the age, genesis and geodynamical control of the extensive magmatism. SHRIMP and LA-ICP-MS zircon U–Pb dating indicate that the plutons were emplaced in the range of latest Jurassic (ca. 152 Ma) to early Cretaceous (ca. 132 Ma), which was followed by dyke emplacement between 127 and 121 Ma and volcanism during the 130–113 Ma interval. Both diorites and quartz diorites are sodic, metaluminous, high-K calc-alkaline, and characterized by strongly fractionated, sub-parallel REE patterns without obvious Eu anomalies. The rocks are enriched in highly incompatible elements and large ion lithophile elements, but depleted in high field strength elements. Samples of diorite and quartz diorite have similar Sr–Nd isotopic compositions that are consistent with the early Cretaceous basalts and mafic intrusions throughout the eastern Yangtze craton. The geochemical and isotopic data, together with results of geochemical modeling, indicate an enriched mantle source for the plutonic rocks. The quartz diorites have geochemical signatures resembling adakites, such as high Al2O3 (15–19 wt.%), Sr (630–2,080 ppm), Na2O (>3.5 wt.%), negative Nb–Ta anomalies, low Y (7–19 ppm), Yb (0.5–1.8 ppm), Sc (5–15 ppm), and resultant high Sr/Y (45–200) and La/Yb (31–63) ratios. Genesis of the adakitic quartz diorites is best explained in terms of low-pressure intracrustal fractional crystallization of cumulates consisting of hornblende, plagioclase, K-feldspar, magnetite, and apatite from mantle-derived dioritic magmas. Mantle-derived magmatism broadly coeval with that of the Daye region also is widespread in other regions of the eastern Yangtze craton, reflecting large-scale melting of the lithospheric mantle during the Late Mesozoic. The large-scale magmatism was most likely driven by lithospheric extension associated with thinning of lithospheric mantle beneath the eastern China continent.  相似文献   

18.
安徽钱桥-象山角闪石堆晶岩岩石学和地球化学特征   总被引:2,自引:0,他引:2  
安微钱桥-象山角闪石堆晶岩是由相当于低硅闪长岩中暗色微粒包体的玄武质岩浆在9.24~12.77km深度和高水压条件下结晶分离作用堆晶形成的。残余的低硅闪长质熔体将它们携带到浅部侵位。结晶分离形成这种堆晶岩的岩浆是玄武质的,可能是由地幔岩中等程度部分熔融形成的拉斑玄武质岩石经再次熔融形成的。  相似文献   

19.
At the Kingking porphyry copper-gold deposit, Compostela Valley, south-eastern Mindanao, Philippines, bornite pods occur in the brecciated parts in the biotite diorite porphyry, together with the volcanic rock and diorite fragments without associated stockworks of quartz veinlets. These pods are generally elongated in shape and measure several centimeters across their longest axes. They are composed of bornite and chalcopyrite with traces of calaverite. The δ34S of bornite and subordinate chalcopyrite of bornite pods ranging from −2.2‰ to +0.1‰ are similar to the δ34S of sulfides associated with quartz veinlets such as bornite and chalcopyrite ranging from −4.7‰ to ±0.0‰. This suggests that the ultimate source of sulfur is identical for bornite pods and sulfides associated with quartz veinlets. Bornite pods are associated with volcanic rock and dioritic fragments in the brecciated portion of the biotite diorite porphyry. It was observed that some dioritic fragments contain quartz veinlets, which may indicate an earlier episode of mineralization. Fragments of the earlier dioritic intrusive rocks and the volcanic rocks, together with the sulfides were incorporated into the biotite diorite porphyry magma. A molten sulfide is possible for the composition between bornite and intermediate solid solution at ∼800°C. The sulfides from the earlier dioritic intrusive rocks in the molten state were segregated and then eventually coalesce to form the bornite pods in the brecciated section of the biotite diorite porphyry.  相似文献   

20.
新疆尾亚矿区3期岩浆混合作用的初步研究   总被引:1,自引:0,他引:1       下载免费PDF全文
新疆东天山的尾亚钒钛磁铁矿矿区,发育3期岩浆混合作用。第一期为辉长质与花岗质岩浆混合.并生成闪长质岩石;第二期为闪长质与花岗质岩浆的混合,生成了石英二长质岩浆;第三期为石英二长岩浆与闪长质岩浆的混合。在各类岩石氧化物对SiO2的哈克图解上,尾亚3期岩浆混合岩石的投影点分别呈相关的线性关系。在稀土和微量元素方面,3期岩浆混合作用形成的岩石分别表现出相近的地球化学特征。配分曲线形态各自相似.形成的过渡岩石——岩浆混合岩类与各自的端元岩石具有继承关系。3期岩浆混合作用之间具有明显的继承性:第一期形成的岩浆混合岩,成分相当于闪长岩,与第二期岩浆混合的基性端元属同类岩石.且与第二期各类岩石具有相似的地球化学特征;第二期形成的石英二长闪长岩,与第三期的端元岩石石英二长斑岩体完全可以对比。尾亚地区的3期岩浆混合作用表明,混合作用可以是多阶段、多期次的,本区火成岩类最初的母岩浆是酸性的陆壳硅铝质和基性的幔源铁镁质岩浆。岩浆混合作用反映了本区壳幔相互作用的本质。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号