|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Ophiolites of the Central Asian Orogenic Belt:Geochemical and petrological characterization and tectonic settings显示文摘We present a compilation of published data(field,petrography,ages and geochemistry)from 73 ophiolitic complexes of the Central Asian Orogenic Belt.The ophiolitic complexes,ranging in age from Neoproterozoic to Triassic.have been geochemically classified as subduction-related and subductionunrelated categories applying recent,well-established discrimination diagrams.The subductionunrelated category is further subdivided into Mid-Ocean Ridge type(MOR),a common rift-drift stage and Plume type,and the subduction-related category is subdivided into Backarc(BA),Forearc(FA).Backarc to Forearc(BA-FA)and Volcanic Arc(VA)types.The four subduction-related types define highly different geochemical features,with the BA and FA types defining end members showing subduction influence of 10%-100%and 90%-100%subduction influence,respectively,and the two other types(BAFA and VA)define values between the two end members.The subduction-related category comprises79%of the examined ophiolites,of which the BA type ophiolites is by far the dominant group,followed by the BA-FA type,and with FA and VA types as subordinate groups.The Neoproterozoic and Ordovician complexes exhibit the highest,whereas those of Silurian age exhibit the lowest subduction-influence.Of the remaining 21%subduction-unrelated ophiolites,the MOR type dominates.Both the subductionrelated and subduction-unrelated types,in particular the latter,are commonly associated with alkaline basalts taken to represent ocean island magmatism.Harzburgite,dunite,gabbro and basalt are the common lithologies in all ophiolite types,whereas the BA-FA,FA and VA types generally contain intermediate to felsic rocks,and in the FA type boninites occur.The subduction-related ophiolites types generally show low metamorphic grade,whereas greenschist.amphibolite and blueschist grades occur in the subduction-unrelated and BA types.The highly different subduction contribution(from 0 to 100%in the MOR and FA,respectively),attest to variable dips of the subducting slab,as well as variable flux of subduction-related elements into the mantle above subducting slabs,from where the ophiolite magmas got their geochemical fingerprints.As most MOR ophiolites get subducted to the deep mantle,the subduction-related ophiolites have become a dominant ophiolitic type on Earth’s surface through all times supporting the idea about the early start of Plate Tectonics. | Harald Furnes Inna Safonova | 2019 | Geoscience Frontiers2019，10，4： | 15 |
| 2 | Triggers and sources of volatile-bearing plumes in the mantle transition zone显示文摘The paper discusses generation of volatile-bearing plumes in the mantle transition zone(MTZ) in terms of mineral-fluid petrology and their related formation of numerous localities of intra-plate bimodal volcanic series in Central and East Asia.The plume generation in the MTZ can be triggered by the tectonic erosion of continental crust at Pacific-type convergent margins and by the presence of water and carbon dioxide in the mantle.Most probable sources of volatiles are the hyclrated/carbonated sediments and basalts and serpentinite of oceanic slabs,which can be subducted down to the deep mantle.Tectonic erosion of continental crust supplies crustal material enriched in uranium and thorium into the mantle,which can serve source of heat in the MTZ.The heating in the MTZ induces melting of subducted slabs and continental crust and mantle upwelling,to produce OIB-type mafic and felsic melts,respectively. | Inna Safonova Konstantin Litasov Shigenori Maruyama | 2015 | Geoscience Frontiers2015，6，5： | 4 |
| 3 | The Russian-Kazakh Altai orogen:An overview and main debatable issues显示文摘The paper reviews previous and recently obtained geological,stratigraphic and geochronological data on the Russian-Kazakh Altai orogen,which is located in the western Central Asian Otogenic Belt(CAOB),between the Kazakhstan and Siberian continental blocks.The Russian-Kazakh Altai is a typical Pacific-type orogen,which represents a collage of oceanic,accretionary,fore-arc,island-arc and continental margin terranes of different ages separated by strike-slip faults and thrusts.Evidence for this comes from key indicative rock associations,such as boninite-and turbidite(graywacke)-bearing volcanogenic-sedimentary units,accreted pelagic chert,oceanic islands and plateaus,MORB-OIB-protolith blueschists.The three major tectonic domains of the Russian-Kazakh Altai are:(1) Altai-Mongolian terrane(AMT);(2) subduction-accretionary(Rudny Altai,Corny Altai) and collisional(Kalba-Narym) terranes;(3) Kurai,Charysh-Terekta,North-East,Irtysh and Char suture-shear zones(SSZ).The evolution of this orogen proceeded in five major stages:(i) late Neoproterozoic-early Paleozoic subduction-accretion in the Paleo-Asian Ocean:(ii) Ordovician-Silurian passive margin;(iii) Devonian-Carboniferous active margin and collision of AMT with the Siberian continent;(iv) late Paleozoic closure of the PAO and coeval collisional magmatism;(v) Mesozoic post-collisional deformation and anarogenic magmatism,which created the modern structural collage of the RussianKazakh Altai orogen.The major still unsolved problem of Altai geology is origin of the Altai-Mongolian terrane(continental versus active margin),age of Altai basement,proportion of juvenile and recycled crust and origin of the middle Paleozoic units of the Gorny Altai and Rudny Altai terranes. | Inna Safonova | 2014 | Geoscience Frontiers2014，5，4： | 3 |
| 4 | Asia: a frontier for a future supercontinent Amasia显示文摘 | Inna Safonova Shigenori Maruyama | 2014 | International Geology Review2014，，9： | 1 |
| 5 | Mud volcano origin of the Mottled Zone,South Levant显示文摘Mottled 地区(MZ ) 在南方山羊皮发生在 levant 的变换附近,或 Hatrurim 形成在最后 150 年期间被学习了,但是它的起源仍然保持可争辩。Mottled 地区复杂 / 复杂(MZC/MZCs ) 由 brecciated 碳酸盐和低温度的 calcium-hydrosilicate 岩石组成,它包括不平常的 high-high-temperature 和 ultra-high-temperature 低压(HT-LP ) 变形矿物质集合。MZ 被认为是 Ghareb Fm 的沥青的粉笔的燃烧的一个产品。白垩纪(Maastrichtian ) 年龄。在这份报纸我们在场详细说明地理, geomorphologic ,从南方山羊皮的 MZC 的结构、地质的数据,证明因为 MZC 迟了的 Oligocenelate 更新世沉积物发生在以内或 unconformably , MZC 不能地层学地与 Ghareb Fm 被相关,两个都重叠迟了的白垩纪并且在地方,晚第三纪 stratigraphic 单位。我们在迟了的 Oligocenelate 更新世时间期间由构造地导致的泥火山作用为 MZC 的形成建议一个其他的模型。这个模型向(i) 解释堤和像试管的身体的存在,它由异国情调的碎屑状的材料从地层学地并且 hypsometrically 更低的地平线导出的 brecciated 组成;(ii ) sanidinite 外形变态的矿物质集合;(iii ) HT-LP 的多级式的特性高热变质;并且(iv ) 多级式的低温度的热水的改变。高温度(多达 1500 ???????????????????????? 畈潲楮湡?? | Igor Novikov Yevgeny Vapnik Inna Safonova | 2013 | Geoscience Frontiers2013，4，5： | 1 |
| 6 | Survived and disappeared intra-oceanic arcs of the Paleo-Asian Ocean:evidence from Kazakhstan显示文摘This paper reviews published and presents new data on U-Pb detrital zircon ages,and petrographic,geochemical and isotope(Sm-Nd,Lu-Hf)compositions obtained from greywacke sandstones of Kazakhstan in order to reconstruct fossil intra-oceanic arcs that once existed at Pacific-type convergent margins of the Paleo-Asian Ocean(PAO)in Paleozoic time.We focus on orogenic belts of central Kazakhstan(Itmurundy and Tekturmas)and eastern Kazakhstan(Zharma and Char)in the western Central Asian Orogenic belt.These orogenic belts host accretionary complexes with greywacke sandstones of early Paleozoic(central Kazakhstan)and middle-late Paleozoic(eastern Kazakhstan)ages.First,we evaluate general perspectives for studying sandstones to reconstruct survived and disappeared magmatic arcs,taking into account episodes of subduction erosion.Then we discuss the analytical data from sandstones to make conclusions about the ages and formation settings of their igneous protoliths and define maximum deposition ages.Finally,we discuss the role of serpentinite melanges in tectonic reconstructions.We argue that sandstones hosted by accretionary complexes are typically greywackes deposited close to their igneous sources and buried rapidly.The provenances of the studied greywacke sandstones of central and eastern Kazakhstan were dominated by mafic to andesitic igneous protoliths derived from juvenile mantle sources.The igneous rocks in the provenances were emplaced in an intra-oceanic arc setting.The sandstones were deposited in fore-arc/trench basins or,to a lesser degree,in back-arc basins.The data from both sandstones and serpentinite melanges reconstruct middle-late-Cambrian,Ordovician,late-D evonian and Carboniferous arcs of the western PAO.The middle-late Cambrian arcs were fully destroyed by subduction erosion,whereas the Ordovician and Carboniferous arcs survived.The late-D evonian arcs were also eroded,but partly.Both the early and late Paleozoic active margins of the PAO were characterized by alternating periods of accretionary growth and subduction erosion. | Inna Safonova Alina Perfilova | 2023 | National Science Review2023，10，2： | 0 |
| 7 | 川西鲜水河、安宁河和龙门山断裂带地热水的水文地球化学特征及成因模式的讨论显示文摘[研究目的]研究川西鲜水河断裂带、安宁河断裂带和龙门山断裂带地热水的水化学特征及成因模式,可为川西地热水资源的合理开发利用提供重要参考依据。[研究方法]本文运用水文地球化学、热储温度计算、氢氧同位素等方法分析了分布在3条断裂带上的48处典型温泉(地热井)的水化学组分、水化学过程、热储温度和深度、热水补给来源等特征,并探讨了其形成模式。[研究结果]结果显示:(1)鲜水河断裂带热水水化学类型以HCO_(3)-Na型为主;龙门山断裂带主要为SO_(4)-Na和Cl-Na型;安宁河断裂带包括HCO_(3)·Cl-Na、HCO_(3)·SO_(4)-Ca·Mg和Cl·SO_(4)-Na型等。(2)3条断裂带地热水组分主要受硅酸盐矿物溶解和离子交换作用控制。(3)鲜水河断裂带热储温度为129.6~210.6℃,深度为2532~4184 m,冷水混入比为66%~82%;安宁河断裂带热储温度为81~121.9℃,深度为2155~3519 m,冷水混入比为52%~95%;龙门山断裂带热储温度为108.2~153℃,深度为3573~5654 m,冷水混入比为68%~89%。(4)3条断裂带的地热水接受大气降雨补给,补给高程分别为鲜水河断裂带2493~5034 m、安宁河断裂带3235~3839 m和龙门山断裂带1628~4574 m。(5)鲜水河断裂带地热水的“δ^(18)O漂移”程度强于安宁河断裂带,龙门山断裂带部分地热水出现“δ^(18)O漂移”和“负向漂移”特征。[结论]基于本次研究得到的3条断裂带地热水成因模式,鲜水河断裂带地热水的开发潜力优于安宁河断裂带、龙门山断裂带,是四川省中高温地热资源开发利用的优势靶区。 | 吕国森 章旭 张云辉 SAFONOVA Inna 黄豪擎 余中友 代倩 | 2024 | 中国地质2024，51，1： | 0 |
| 8 | Devonian continental arc magmatism in the southern Central Asian Orogenic Belt:Evidence from the Dunhuang Block,NW China显示文摘Reconstruction of periods and sources of continental arc magmatism provides critical insights for deciphering the thermal evolution and geodynamics of the continental lithosphere and unveiling subduction-related episodes of accretion and orogeny.The Dunhuang Block,located in the southern Central Asian Orogenic Belt,is built upon a Precambrian metamorphic crystalline basement that is intruded by numerous Paleozoic granitoids.In this paper,we present new zircon U-Pb ages,wholerock geochemistry and Sr-Nd-Pb-Hf isotopes from the Hanxiakouzi and Shuangta granodiorite plutons outcropped in the central and northern Dunhuang Block,respectively.The U-Pb zircon dating indicate that the Hanxiakouzi and Shuangta granodiorites were emplaced at ca.366–363 Ma,i.e.,in the late Devonian.Geochemically,the Hanxiakouzi granodiorites are medium-to high-K,I-type granites possessing high Sr and Sr/Y,i.e.,similar to adakites.The Hanxiakouzi granodiorites show negativeε_(Nd)(t)values(-8.2 to-6.6),significant positive eHf(t)values(+0.7 to+8.1),and evolved Pb isotope features suggesting their derivation by melting of subducted terrigenous sediments,interaction of melts with mantle peridotite,and assimilation of ancient crust during magma ascent.The Shuangta granodiorites belong to high-K calc-alkaline I-type granites with medium Sr and low Sr/Y.The Shuangta granodiorites yield negativeε_(Nd)(t)values(-2.9 to-3.1)and negative to positive zircon eHf(t)values(-1.8 to+3.6),suggesting their formation by partial melting of ancient mafic crust with addition of minor mantle-derived melt and subducted terrigenous sediments.In general,Hf-in-zircon isotopes characteristics of the late Paleozoic granitic rocks in the Dunhuang Block indicate that the southern Dunhuang area carries more ancient crust materials than the central and northern Dunhuang areas,indicating a lateral heterogeneity of the middle Paleozoic crust.Conclusively,the middle Paleozoic granitoids of the Dunhuang Block were emplaced at an active continental margin of the southern Paleo-Asian Ocean. | Baoping Gan Juxing Tang Inna Safonova Limao Qin Chunrong Diwu | 2023 | Geoscience Frontiers2023，14，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员