Journal of Asian Earth Sciences最新文献

{"title":"Hydrogeochemical characteristics of hot springs in the Longriba fault, northeastern Tibetan Plateau: Tectonic implications for geothermal fluid circulation","authors":"Yuwen Wang ,&nbsp;Xiaocheng Zhou ,&nbsp;Jingchao Li ,&nbsp;Yunfei Bai ,&nbsp;Yucong Yan ,&nbsp;Jiao Tian ,&nbsp;Miao He ,&nbsp;Zhaojun Zeng ,&nbsp;Bingyu Yao ,&nbsp;Gaoyuan Xing ,&nbsp;Shihan Cui ,&nbsp;Ying Li ,&nbsp;Liwu Li","doi":"10.1016/j.jseaes.2025.106511","DOIUrl":"10.1016/j.jseaes.2025.106511","url":null,"abstract":"<div><div>The Longriba fault (LRBF) is in the seismically active northeastern Tibetan Plateau, yet the tectonic dynamics at the fault remain controversial. Furthermore, no studies have provided insights into tectonic activity through geothermal fluid circulation in the LRBF. In this study, we investigated 20 hot springs in the LRBF to get a better understanding of the processes and control factors between fluid circulation and tectonic activity. Hydrogeochemical results indicate that the hot springs in the study area are predominantly recharged by atmospheric precipitation and can be classified into two groups based on their hydrochemical types. Group I was a typical HCO₃-Ca, including some HCO₃-Ca⋅Mg, HCO₃-Mg, and HCO₃-Na⋅Ca. Group II hot springs, classified as HCO₃-Na type, have high reservoir temperatures (average 94 °C), suggesting dominant reactions with silicates during deep circulation. Meanwhile, the hydrogen, oxygen, and strontium isotopes of water in the two groups also show significant differences. In addition, the Group II hot springs are all located in the southwest segment of the study area, and their gases have higher ³He/⁴He ratios (Rc/Ra ratios up to 0.43 Ra). Hydrogeochemical results, combined with geological and geophysical data, suggest that differences in recharge elevation, granite distribution, and potential lower crustal flow or partial melting contributed to the distinct hydrogeochemical characteristics of the two groups. Moreover, we supposed that the spatial distribution of ³He/⁴He implies a lower crustal flow and partial melting beneath the LRBF. One possible explanation is the presence of a lower crustal flow tributary beneath the LRBF. In the LRBF, hydrothermal circulation and deep tectonics are likely key factors in generating high-frequency earthquakes. The above results provide insights into regional tectonic activity through the hydrogeochemical characteristics of hot springs.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106511"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Active tectonics and kinematic architecture of intraplate strike-slip fault: Savrun fault zone, SE Türkiye","authors":"Şule Gürboğa","doi":"10.1016/j.jseaes.2025.106509","DOIUrl":"10.1016/j.jseaes.2025.106509","url":null,"abstract":"<div><div>Türkiye is a unique country whose deformation pattern has been formulated in terms of three main plates Eurasia, Africa, Arabia and microplate Anatolian that are actively moving in recent time. This variety creates a giant fault network defining the plate boundaries and intraplate faults. Savrun Fault Zone (SFZ) is one of the intraplate strike-slip faults near west of the 2023 earthquakes area and many controversies have arisen about its activeness. In this study, it is investigated and reported on the geometric, structural, and kinematic characteristics of the SFZ based on field measurements of fault-slip data. At least two different deformation phases have been recognized in the geological evolution of the SFZ; older NNE-SSW compressional tectonic up to Middle Pliocene and the youngest strike-slip regime created by N-S compression and E-W extensional direction. According to the results, SFZ is a reactivated reverse fault and its the present-day configuration is an active sinistral strike-slip architecture comprising three segments (north, middle and east) and two contractional stepovers reflecting strong geomorphic indicators marked by strike parallel fault valley.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106509"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Velocities and strain rates in the Baikal-Mongolia region from the GNSS data","authors":"A.V. Lukhnev,&nbsp;V.A. Sankov,&nbsp;A.I. Miroshnichenko,&nbsp;L.M. Byzov,&nbsp;A.V. Sankov,&nbsp;O.F. Lukhneva","doi":"10.1016/j.jseaes.2025.106500","DOIUrl":"10.1016/j.jseaes.2025.106500","url":null,"abstract":"<div><div>We carried out study crustal deformations in the Baikal-Mongolian area as a key Indo-Asian collision zone including kinematic, geodynamic, and active tectonic aspects. The GNSS measurement data over the last 29 years formed the basis for calculating vectors of horizontal tectonic movements at a qualitatively new level. Recent results show the southeastern movement of the Trans-Baikal sites at an average velocity of 2 mm yr⁻¹.</div><div>We calculated the most realistic velocity of the opening of the Baikal Rift are of 0.9 ± 0.1 mm year⁻¹. On the basic long-term measurements we are computed the parameters of the rotation pole of the Siberian block (φ.: 53.107°; λ.: −99.793°; Mg.: 0.249282° Myr⁻¹).</div><div>The maximum values of area extension rates are mainly confined to the central parts of the Baikal rift and the Tunka depression. The amplitudes of the relative deformation extension exceed 20 × 10^-9 yr⁻¹.</div><div>The strain rate analysis also provided an opportunity to distinguish three deformation domains – contraction-, extension- and transition-dominated. Narrow zones identified between the extension- and contraction-dominated deformation domains are confined to large seismic events therein. Transitional zones are found in the central Mongolia, Transbaikalia and Tuva, with dilatation rates ranging from −5 to 5 × 10^-9 yr⁻¹.</div><div>A sharp positive to negative dilatation transition boundary is associated with recent significant seismic events.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106500"},"PeriodicalIF":2.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Origin of Late Triassic lamprophyres in the western Yanshan Tectonic Belt related to destruction of the North China Craton: Geochronological and geochemical constraints","authors":"Zhuang Li ,&nbsp;Guochun Zhao ,&nbsp;Bin Chen ,&nbsp;Mingshuo Qin","doi":"10.1016/j.jseaes.2025.106504","DOIUrl":"10.1016/j.jseaes.2025.106504","url":null,"abstract":"<div><div>Lamprophyres, ultrapotassic igneous rocks generally derived from the melting of enriched subcontinental lithospheric mantle, typically form in extensional tectonic settings and are associated with coeval transcrustal processes. The genesis of lamprophyres provides insights into the generation, storage, and emplacement of lamprophyric magmas, and further constrains the nature of mantle sources. However, the origin of lamprophyres remains enigmatic and requires further investigation. The Late Triassic lamprophyres along the western Yanshan Tectonic Belt of the northern North China Craton (NCC) offer a key opportunity to understand the tectonic evolution of this region, particularly their relationship with the onset of craton destruction. Here we report the results of an integrated geochronological and geochemical study of Late Triassic lamprophyres and quartz monzonite porphyries in Beijing on the western Yanshan Tectonic Belt. U–Pb zircon dating using LA–ICP–MS reveals that the lamprophyres and quartz monzonite porphyries were emplaced contemporaneously during <em>ca.</em> 235–220 Ma, marking a Late Triassic magmatic event in the northern NCC. The Late Triassic lamprophyre and quartz monzonite porphyry sills are enriched in large ion lithophile elements (LILEs) and light rare earth elements (LREEs) but are depleted in high field strength elements (HFSEs), exhibiting arc-like geochemical characteristics. They also display high MgO and total alkali concentrations with low silica contents. Unradiogenic whole-rock Nd and Hf isotope compositions [(ε_Nd(t) = −11.3 to −10.8) and (ε_Hf(t) = −16.3 to −12.5)] indicate that the magmas of the Triassic suite were likely derived from an enriched lithospheric mantle source, followed by fractional crystallization of ferromagnesian phases and minor crustal assimilation. Geochemical modeling suggests that the parental magma of the lamprophyres was generated through a low degree (&lt;5 %) partial melting of spinel–garnet lherzolites. These results suggest that the investigated rocks originated from a subcontinental lithospheric mantle enriched by fluid and/or melt metasomatism, likely during subduction of the Paleo-Asian oceanic plate beneath the NCC. Radiogenic zircon Hf isotope compositions [e.g., ε_Hf(t) = 6.4 to 8.9] of the Late Triassic lamprophyres point to the involvement of a depleted mantle source. The upwelling of the asthenosphere, triggered by intensive intra-continental extension during the Triassic, likely provided the heat required to melt the enriched subcontinental lithosphere beneath the NCC. This Late Triassic interaction between the asthenosphere and the lithospheric mantle marks the onset of NCC destruction and contributed to its thermo-mechanical erosion.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106504"},"PeriodicalIF":2.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seismic activity characteristics of the Tongkuang Shan fault (Southeastern Tian Shan, China) revealed by high-resolution topographic data","authors":"Hui Qiu ,&nbsp;Haiyun Bi ,&nbsp;Wenjun Zheng ,&nbsp;Jiangyuan Zeng ,&nbsp;Bingxu Liu ,&nbsp;Shiqi Wei","doi":"10.1016/j.jseaes.2025.106505","DOIUrl":"10.1016/j.jseaes.2025.106505","url":null,"abstract":"<div><div>With the rapid development of remote sensing technology, it is getting easier to obtain high-resolution topographic data, which is of great significance for quantitative investigations of active tectonics, particularly in inaccessible regions. The Tongkuang Shan Fault is a thrust fault located within the Yanqi Basin in the southeastern Tian Shan Mountain, and can be divided into the west and east segment based on the fault geometry. Although obvious fault scarps have developed along the fault, its activity has rarely been investigated since most part of the fault is located in a closed military area. In this study, the Worldview satellite stereoscopic images were utilized to create a 0.5 m resolution Digital Elevation Model (DEM) and orthoimage of the Tongkuang Shan Fault. Based on the high-resolution topographic data, we interpreted the geometric structure of the fault, classified the different geomorphic units, and measured the vertical displacements along the fault. A total of 296 vertical displacements were measured on different geomorphic surfaces along the fault trace. The results show six distinct clusters in the distribution of vertical displacements along the fault, with peak values at 1.4 ± 0.4/1.5 ± 0.5 m, 3.0 ± 0.7/3.4 ± 0.6 m, 5.7 ± 0.9/5.5 ± 0.7 m, 8.9 ± 1.2/8.2 ± 1.3 m, 15.4 ± 1.0/16.2 ± 0.9 m, and 28.3 ± 1.8/26.5 ± 1.5 m on the west and east segment, respectively, which are in good agreement with the vertical displacements acquired from different geomorphic units, indicating a multiple phase of activity on the fault. The fault may have undergone at least six strong paleoseismic events, and the smallest displacement cluster (1.4 ± 0.4/1.5 ± 0.5 m) is considered to be the coseismic displacement of the most recent event, yielding an earthquake magnitude of approximately M_w 7.0–7.2. Moreover, the coefficient of variation of the first four peak displacements are 0.39 and 0.24 for the two segments, indicating a high repeatability of paleoseismic displacements on the fault, potentially conforming to a characteristic earthquake model.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106505"},"PeriodicalIF":2.7,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Eocene to Pliocene magmatic evolution and its association with gold mineralization in central western Sulawesi, Indonesia","authors":"Renaldi Suhendra ,&nbsp;Andrea Agangi ,&nbsp;Ryohei Takahashi ,&nbsp;Marlina A. Elburg ,&nbsp;Muhammad Zain Tuakia ,&nbsp;Hartaja Wicaksono ,&nbsp;Hinako Sato ,&nbsp;Iwan Setiawan","doi":"10.1016/j.jseaes.2025.106506","DOIUrl":"10.1016/j.jseaes.2025.106506","url":null,"abstract":"<div><div>Late Eocene and late Miocene–Pliocene magmatism in central western (CW) Sulawesi were defined by the U-Pb ages of magmatic zircon from the intrusive rocks. The late Eocene magmatism formed diorite and granitoid with hornblende-rich, calc-alkaline, and medium- to high-K compositions, derived from hydrous (av. 5.6 wt% H₂O) and oxidized I-type intermediate to felsic magmas. The late Miocene–Pliocene magmatism formed gabbro and granitoid. The granitoid is biotite-rich, calc-alkaline, and high-K composition, derived from hydrous (av. 8.4 wt% H₂O) and reduced I-type felsic magma. Negative anomalies of Nb, Ta, and Ti, and positive anomalies of K and Pb in the primitive mantle normalized trace element plots of the late Eocene hornblende-rich diorite and granitoid suggest formation in a subduction-related setting. The late Miocene–Pliocene gabbro formed by partial melting of upper mantle with minimal crustal contribution, whereas the granitoid formed through the reworking of previous subduction-related rocks during post-subduction regional extension. These are suggested by the occurrence of late Eocene inherited zircon grains in the late Miocene–Pliocene gabbro and granitoid and by similar trace element anomalies between biotite-rich granitoids and late Eocene diorite–granitoid. We observed that the oxidation state of magma strongly influences associated Au mineralization. The intrusion-related Fe-oxide-Au mineralization in the Awak Mas deposit is genetically linked to either late Eocene or previously reported middle Miocene oxidized I-type dioritic and granitic intrusions. Conversely, the intrusion-related base metal-Au-type mineralization in the Palopo and Esang prospects is associated with the late Miocene–Pliocene reduced I-type granitic intrusions.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106506"},"PeriodicalIF":2.7,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated chemostratigraphy and detrital zircon geochronology of the Ediacaran–Cambrian transition in the Western Anabar Uplift: Implications for the Neoproterozoic evolution of the northern Siberian Platform","authors":"Vasiliy V. Marusin ,&nbsp;Natalia V. Bykova ,&nbsp;Dina V. Semenova ,&nbsp;Boris B. Kochnev ,&nbsp;Natalia A. Ivanova","doi":"10.1016/j.jseaes.2025.106507","DOIUrl":"10.1016/j.jseaes.2025.106507","url":null,"abstract":"<div><div>The Terreneuvian strata of the Anabar Uplift (northern Siberian Platform) represent one of the reference sections for the periodization of the Early Cambrian geological record and global correlation. The age of the underlying Staraya Rechka Formation remains unclear due to a lack of biostratigraphic data, equivocal carbon isotope record and controversial geochronological age constraints. Herein we present the detailed chemostratigraphic (carbonate carbon isotope analysis) and geochronological (U-Pb analysis of detrital zircons) study of the Staraya Rechka Formation in the Western Anabar Uplift. Our data reveal that this evaporite-associated carbonate succession accumulated in the terminal Ediacaran within 550–540 Ma and is unconformably overlapped by the Nemakit-Daldyn Formation no older than 537 Ma. Hence, the carbonate isotope record of the Western Anabar Uplift lacks the BACE isotope excursion. At the beginning of the accumulation of the Staraya Rechka Formation, the clastic material in the paleobasin was derived from the Central Taymyr Fold Belt and crystalline basement of the Siberian Platform. In contrast, detrital zircons in the upper Staraya Rechka and basal Nemakit-Daldyn formations mostly originate from the rift magmatism that occurred in the northeastern Siberian Platform around the Ediacaran–Cambrian transition.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106507"},"PeriodicalIF":2.7,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constraints of detrital garnet and zircon on provenance of Late Permian–Early Triassic fore-arc sedimentary succession in the Kurosegawa Belt, Japan","authors":"Masahiro Ohkawa ,&nbsp;Makoto Takeuchi","doi":"10.1016/j.jseaes.2025.106502","DOIUrl":"10.1016/j.jseaes.2025.106502","url":null,"abstract":"<div><div>The ages of detrital zircons are not always sufficient to definitively constrain sediment sources. Information obtained from the ages of these zircons should be complemented with information from other detrital minerals such as garnet. However, studies using detrital garnets and zircons regarding provenance shift are rare. In this study, we elucidate the effectiveness of a method combining detrital garnet and zircon analyses from the Late Permian–Early Triassic Shingai Unit of Southwest Japan and reveal spatial changes in the Permian–Triassic provenance of fore-arc sedimentary successions in Japan. A comprehensive analysis showed that the detrital garnets changed from almandine- to grandite-dominated assemblages, implying a provenance shift from non-calcareous to calcareous metamorphic rocks. Conversely, detrital zircons consistently indicate a predominantly igneous origin, comprising Late Paleozoic–Early Mesozoic ages with minor pre-Late Paleozoic ages. The statistical results of the detrital garnet compositions and zircon ages showed different characteristics, and the variation in garnet composition indicated a shift in metamorphic origin. Conversely, the variation in the zircon spectra may be influenced by different proportions of pre-Late Paleozoic components of igneous origin. These findings highlight that the detrital zircon record influenced predominantly by igneous sources, whereas the detrital garnet record is primarily influenced by metamorphic sources. Based on regional geological information, the primary provenance of the Permian–Triassic fore-arc successions in Japan is a Late Paleozoic–Early Mesozoic volcanic arc with contact metamorphic rocks and pre-Late Paleozoic arc-related rocks, which changed from volcanic and non-calcareous metamorphic rocks to plutonic and calcareous metamorphic rocks through uplift and denudation.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106502"},"PeriodicalIF":2.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Explosive ultramafic volcanism in Phanerozoic accreted terranes: A case study of the Taragai peridotite complex (Russian Far East)","authors":"Nikolai Berdnikov,&nbsp;Pavel Kepezhinskas,&nbsp;Victor Nevstruev,&nbsp;Valeria Krutikova,&nbsp;Natalia Konovalova","doi":"10.1016/j.jseaes.2025.106503","DOIUrl":"10.1016/j.jseaes.2025.106503","url":null,"abstract":"<div><div>In the Bureya accreted terrane of the Central Asian Orogenic Belt, the Taragai peridotite complex displays geologic characteristics of an explosive volcanic pipe. The crater-like, central topographic depression is composed of ultramafic pyroclastic rock that is surrounded by partially eroded tephra walls with imbedded peridotite blocks. Both peridotite blocks and ultramafic pyroclastics consist of olivine, orthopyroxene and spinel with minor phlogopite and display similar subduction-related geochemical characteristics. A certain degree of crustal contamination is suggested by highly radiogenic Sr isotope compositons of peridotites. LILE- and LREE-enriched basaltic dikes intrude ultramafic pyroclastic rocks. Peridotite blocks, ultramafic pyroclastic rocks and basaltic dikes contain three types of microspherules composed of 1) magnetite, 2) sulfide (mostly pyrrhotite) and 3) Cu-Ag-Au alloy. Magnetite microspherules reflect oxidation of sulfide in peridotite. Cu-Ag-Au microspherules were formed through re-melting of Cu-Ag-Au particles in peridotite blocks. Sulfide microspherules represent solidified droplets of sulfide melt generated during explosive emplacement of the Taragai complex. Assemblages of metals, alloys and ore minerals along with distribution of trace and ore elements in the Taragai peridotite complex are similar to the Ildeus ultramafic massif in the Stanovoy superterrane located to the northwest from the Bureya terrane. We propose that Taragai complex was formed as a result of a focused asthenospheric fluid flux from the flat-slab window beneath the Bureya terrane through the subduction-related ultramafic massif. Observed metallogenic features of the Taragai explosive volcanic complex thus may reflect contributions from mineralized ultramafic intrusive target, host accreted terrane rocks and asthenospheric fluid.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106503"},"PeriodicalIF":2.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Origin and evolution of the Qiangtang block, northern Tibetan Plateau: New insights from detrital zircon U-Pb geochronology and Lu-Hf isotopic compositions","authors":"Min Liu ,&nbsp;Xijun Liu ,&nbsp;Hao Wu ,&nbsp;Yao Xiao ,&nbsp;Zhenglin Li ,&nbsp;Hongxia Yu","doi":"10.1016/j.jseaes.2025.106499","DOIUrl":"10.1016/j.jseaes.2025.106499","url":null,"abstract":"<div><div>Detrital zircon age spectra analysis offers insights into tectonic and sedimentary environments. In the Paleozoic sedimentary rocks of the Qiangtang block, northern Tibetan Plateau, we measured U-Pb ages of detrital zircons to elucidate the blocks tectonic-sedimentary evolution and its relationship to the Tethyan regime. Our findings reveal zircon age peaks at approximately ca. 2500, ca. 1600, ca. 970, and ca. 550 Ma, closely resembling the Cimmerian continent and exhibiting paleogeographic affinities with the northern margin of Gondwanan India. Our new data, alongside existing geological data, indicate distinct tectonic pathways for the North and South Qiangtang blocks since the Neoproterozoic as a result of Rodinia breakup. Our sedimentological and geochronological evidence implies that the Longmu Co-Shuanghu suture zone is an in situ ophiolite mélange formed by the closure of the Paleo-Tethyan Ocean.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106499"},"PeriodicalIF":2.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}