Journal of Asian Earth Sciences最新文献_第2页

Petrogenesis of rodingite in the Ngamring massif, Xigaze ophiolite (Southern Tibet): Implications for the evolution of the Neo-Tethys Ocean 藏南日喀则蛇绿岩中蛇绿岩的岩石成因：对新特提斯洋演化的启示

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-15 DOI: 10.1016/j.jseaes.2025.106662

Gui-Fang Ou , Zhong’ao Liu , Wen-Yong Duan , Guang-Ming Sun , Xu-Ping Li , Song-Jie Wang

{"title":"Petrogenesis of rodingite in the Ngamring massif, Xigaze ophiolite (Southern Tibet): Implications for the evolution of the Neo-Tethys Ocean","authors":"Gui-Fang Ou , Zhong’ao Liu , Wen-Yong Duan , Guang-Ming Sun , Xu-Ping Li , Song-Jie Wang","doi":"10.1016/j.jseaes.2025.106662","DOIUrl":"10.1016/j.jseaes.2025.106662","url":null,"abstract":"<div><div>Rodingites, although volumetrically minor, are integral to the Yarlung Zangbo ophiolites in southern Tibet. However, their tectonic setting, protolith, petrogenesis, and fluid sources remain incompletely understood. This study focuses on rodingites from the Ngamring massif of the Xigaze ophiolite, central Yarlung Zangbo Suture Zone (YZSZ), integrating petrology, mineral and whole-rock geochemistry, and phase equilibrium modeling. The rodingites are structurally heterogeneous and classified into type IA and IB, both featuring metasomatic assemblages of prehnite, chlorite, garnet, and salitic clinopyroxene. Phase equilibrium modeling constrains their formation to low pressure–temperature conditions (<4 kbar and 200–290 °C), while relict magmatic clinopyroxenes with high Mg# values [73–87; Mg# = MgO/(MgO + FeO), with all measured iron considered as FeO] suggest a gabbroic protolith crystallized at ∼ 6.0–7.4 kbar. Both rodingites types display rare earth and multi-element patterns similar to normal mid-ocean ridge basalt (MORB), comparable to other MORB-like rodingites within the Xigaze ophiolite. The host peridotites show trace-element features characteristic of abyssal peridotites, representing residues after ∼ 7–14 % spinel-facies melting of a depleted MORB mantle-like source. The rodingites have variable <sup>87</sup>Sr/<sup>86</sup>Sr ratios (0.7036–0.7054) and MORB-like ɛNd(<em>t</em>) values (7.3–8.6), suggesting interactions between MOR-derived gabbroic protoliths and serpentinizing fluids derived from the peridotite. Given the presence of metamorphic soles with MORB-type protoliths and both MORB-like and supra-subduction zone magmatic rocks in the YZSZ, it is suggested that the ophiolites likely originated in a MOR environment before evolving into a supra-subduction zone setting as the Neo-Tethys ridge transitioned into an infant subduction system.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"290 ","pages":"Article 106662"},"PeriodicalIF":2.7,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114932","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}

引用次数: 0

Updating the timeline of faunal endemism in Balkanatolia, the biogeographic province connecting Europe, Asia and Africa 更新巴尔干半岛（连接欧洲、亚洲和非洲的生物地理省）动物特有的时间轴

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-15 DOI: 10.1016/j.jseaes.2025.106661

Leny Montheil , Alexis Licht , Deniz İbilioğlu , Paul Botté , Faruk Ocakoğlu , François Demory , Gilles Ruffet , Abel Guihou , Mustafa Kaya , Benjamin Raynaud , Mehmet Serkan Akkiraz , Pierre Deschamps , Grégoire Métais , Pauline Coster , K. Christopher Beard

{"title":"Updating the timeline of faunal endemism in Balkanatolia, the biogeographic province connecting Europe, Asia and Africa","authors":"Leny Montheil , Alexis Licht , Deniz İbilioğlu , Paul Botté , Faruk Ocakoğlu , François Demory , Gilles Ruffet , Abel Guihou , Mustafa Kaya , Benjamin Raynaud , Mehmet Serkan Akkiraz , Pierre Deschamps , Grégoire Métais , Pauline Coster , K. Christopher Beard","doi":"10.1016/j.jseaes.2025.106661","DOIUrl":"10.1016/j.jseaes.2025.106661","url":null,"abstract":"<div><div>Balkanatolia is a Paleogene insular biogeographic province, spanning from southeastern Europe to the Caucasus. It is located at the crossroads of Asia, Europe, and Africa, from which it remained isolated until the late Eocene, fostering endemism, particularly among mammals. However, the timing of emergence of Balkanatolia as an independent biogeographic province remain debated due to the paucity of the fossil record and loose age constraints. Here, we refine this timing by combining magnetostratigraphy, biostratigraphy, geochronology and sedimentology to date three fossil sites of central Anatolia (Çamili Mezra, Ciçekdagi, and Bultu-Zile). These sites have yielded remains of embrithopods, a clade of large herbivorous afrotherian mammals that originated in Africa and dispersed across the Neotethys to reach Balkanatolia where they diversified. The Çamili Mezra locality yield an age spanning from 46.2 Ma to 43.5 Ma, likely around ∼ 45 Ma based on accumulation rates, the Ciçekdagi locality is dated to the very base of Chron C20r (ca. 46.2 Ma) and the Bultu-Zile locality yield overlapping 46.5 ± 1.0 Ma and 45.1 ± 0.9 Ma ages. Overall, these fossil localities are coherently dated to the early Lutetian and represent the oldest unequivocally embrithopod-bearing sites of the northern Neotethysian shores. They provide an early Lutetian minimum age for Balkanatolian endemism, its emergence as an independent biogeographic province and for the overwater dispersal of embrithopods out of Africa.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"290 ","pages":"Article 106661"},"PeriodicalIF":2.7,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084295","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}

引用次数: 0

Subsurface thermal properties in the deepwater South Makassar Basin, Indonesia 印度尼西亚南望加锡盆地深水的地下热特性

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-14 DOI: 10.1016/j.jseaes.2025.106651

Feisal Dirgantara , Susilohadi Susilohadi , Imam Suyanto , Mohammad Andri Syahrir Iskandar

{"title":"Subsurface thermal properties in the deepwater South Makassar Basin, Indonesia","authors":"Feisal Dirgantara , Susilohadi Susilohadi , Imam Suyanto , Mohammad Andri Syahrir Iskandar","doi":"10.1016/j.jseaes.2025.106651","DOIUrl":"10.1016/j.jseaes.2025.106651","url":null,"abstract":"<div><div>Sandwiched between southeastern Kalimantan and southwestern Sulawesi, the widespread presence of bottom simulating reflectors (BSRs) in the deepwater failed rift of the South Makassar Basin strongly indicates the extensive occurence of methane hydrates. Despite the region’s long petroleum exploration history, the understanding of thermal signatures in the basin remains enigmatic. This study utilized thirty-two legacy multi-channel seismic data surveys to derive heat flow, geothermal gradients, and thermal conductivity from BSRs. By assuming the depth range where methane hydrates remain stable, BSRs can act as a proxy for deducing information related to thermal properties when direct thermal measurements are scarce. Estimated thermal properties indicate a mean heat flow of 86 mW/m<sup>2</sup>, a mean geothermal gradient of 73 °C/km, and a mean thermal conductivity of 1.19 W/m.°C at water depth between 400 and 2050 m. These values differ from marine-probe references in the area, with heat flow and thermal conductivity being on average 34 % and 58 % higher, respectively, geothermal gradients being 13 % lower, and geothermal gradients averaging 30 % higher than exploration wells. The variance between the drilling depth at which methane hydrates were penetrated in three exploration wells and the theoretical base of methane hydrate stability zone vary between a deviation of 6–19 m. Discrepancies in thermal properties values and depth of methane hydrates are attributed to methodological disparities, uncertainties in theoretical assumptions, and geological factors such as thermal uplift from the mantle beneath the thinned lithosphere and localized fluid advection.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"290 ","pages":"Article 106651"},"PeriodicalIF":2.7,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084292","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}

引用次数: 0

Evolution of deep water circulation in the South China Sea since 32 million years ago 3200万年前以来南海深水环流演化

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-14 DOI: 10.1016/j.jseaes.2025.106654

Hao-Wei Huang , Chih-Hua Chen , Zhifei Liu , Kuo-Fang Huang , Chuan-Hsiung Chung , Chen-Feng You

{"title":"Evolution of deep water circulation in the South China Sea since 32 million years ago","authors":"Hao-Wei Huang , Chih-Hua Chen , Zhifei Liu , Kuo-Fang Huang , Chuan-Hsiung Chung , Chen-Feng You","doi":"10.1016/j.jseaes.2025.106654","DOIUrl":"10.1016/j.jseaes.2025.106654","url":null,"abstract":"<div><div>The closure of the Indonesian Gateway (IG)<span><span><sup>1</sup></span></span> has played a pivotal role in influencing interocean circulation, notably affecting the Indonesian Throughflow (ITF) and altering climate patterns in Southeast Asia. However, there remains controversy regarding the timing of IG closure and its impacts on climate changes. In this study, we reconstructed Nd isotope (Ɛ<sub>Nd</sub>) time series to observe the evolution of South China Sea (SCS) deep water over the past 32 Ma from core sediments at northern SCS and to explore the deep water connection between Indian Ocean and SCS before the fully IG closure.</div><div>The Ɛ<sub>Nd</sub> time series of SCS deep water and benthic δ<sup>13</sup>C composition exhibits a remarkably consistent trend with North Indian Deep Water (NIDW) from 12 to 7 Ma, indicating that NIDW once served as a potential source. This feature implies a deep-water connection between the Indian Ocean and SCS deep water during this period. The observed Ɛ<sub>Nd</sub> increases in SCS deep water during key intervals, such as ∼ 11, ∼16, and ∼ 25 Ma, likely link to a reduced contribution of LCDW to SCS deep water. Moreover, the Luzon Strait sill became the sole deep-water pathway into the SCS after IG closure. This restriction may have limited LCDW inflow, potentially intensifying its impacts on SCS deep water, as the LCDW contribution to the SCS has been linked to deep SCS carbon reservoirs. Future studies on high-resolution Ɛ<sub>Nd</sub> records in SCS are necessary to explore the timing and climatic implications of this tectonic transition.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"290 ","pages":"Article 106654"},"PeriodicalIF":2.7,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072586","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}

引用次数: 0

Influence of décollement friction on magnetic fabrics of sedimentary rocks: Insights from AMS analysis in the Kohat fold-thrust belt, Pakistan 巴基斯坦Kohat褶皱冲断带磁导摩擦对沉积岩磁性组构的影响

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-13 DOI: 10.1016/j.jseaes.2025.106652

Muhammad Waqar Azeem , Baochun Huang , Umar Farooq Jadoon , Nazir Ur Rehman , Mohammad Metwaly , Muhammad Umar , Hongliang Lu , Yilian Liao

{"title":"Influence of décollement friction on magnetic fabrics of sedimentary rocks: Insights from AMS analysis in the Kohat fold-thrust belt, Pakistan","authors":"Muhammad Waqar Azeem , Baochun Huang , Umar Farooq Jadoon , Nazir Ur Rehman , Mohammad Metwaly , Muhammad Umar , Hongliang Lu , Yilian Liao","doi":"10.1016/j.jseaes.2025.106652","DOIUrl":"10.1016/j.jseaes.2025.106652","url":null,"abstract":"<div><div>The Kohat fold-thrust belt (KFTB) in the northwestern Himalayan foreland provides a unique opportunity to investigate strain partitioning and the role of evaporitic décollement in fold-thrust belts (FTBs) propagation through magnetic fabrics analysis. Using anisotropy of magnetic susceptibility (AMS) as a strain marker through analog models of FTBs, have already demonstrated the impact of high and low friction décollement in the magnetic fabrics development. In order to validate the accuracy of such model and to enhance the understanding of strain partitioning in FTBs with low-friction décollements, an integrated framework combining AMS and structural analyses was applied to the KFTB. AMS investigations of oriented cores from the Siwalik strata of 72 sites, acquired at different structural levels within the KFTB, highlight distinct magnetic fabric patterns. The low-friction décollement-proximate Siwalik strata exhibit Type-I sedimentary magnetic fabrics, the décollement-distal strata possess intermediate fabrics and the décollement front strata exhibit Type-VI tectonic fabrics. Collectively, the AMS parameters analysis and magnetic fabrics classification reflect the influence of structural controls on magnetic fabrics development. The Type-I sedimentary magnetic fabrics in the Early Miocene Kamlial Formation signify paleo-Indus flow direction towards southeast direction in the KFTB. A new conceptual schematic model integrated with bootstrapped AMS ellipsoids along different structures of the KFTB emphasize the influence of décollement friction, intensity of deformation and FTB propagation over weak layers.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"290 ","pages":"Article 106652"},"PeriodicalIF":2.7,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071378","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}

引用次数: 0

The temporal and spatial evolution of ore-forming fluids during the formation of the Dulong deposit, Southwest China: Linkage with in mineralization 西南独龙矿床形成过程中成矿流体的时空演化：与成矿作用的联系

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-13 DOI: 10.1016/j.jseaes.2025.106657

Jieyong Fu , Jing Xu , Taiping Zhao , Jiadai Li , Liyuan Wang

{"title":"The temporal and spatial evolution of ore-forming fluids during the formation of the Dulong deposit, Southwest China: Linkage with in mineralization","authors":"Jieyong Fu , Jing Xu , Taiping Zhao , Jiadai Li , Liyuan Wang","doi":"10.1016/j.jseaes.2025.106657","DOIUrl":"10.1016/j.jseaes.2025.106657","url":null,"abstract":"<div><div>The Dulong deposit is a major cassiterite-sulfide skarn deposit in Southwest China, hosting significant In resources (7,000t). Although the occurrence of In has been studied in detail, its spatiotemporal distribution and controlling factors remain poorly understood. This study therefore systematically analyzes fluid inclusions, chlorite geochemistry, and combined with published In contents from sphalerite to comprehensively examine ore-forming fluid evolution and its impact on In mineralization. The fluid inclusions data show that S-type, L-type, and V-type can be recognized at Dulong. The S-type inclusions predominantly occur in pyroxene from prograde stage and coexist with L-type inclusions, suggesting that fluid boiling occurred. The homogenization temperature and salinity of fluids show a significant decrease from prograde stage (468–560 °C, 44.7–49.6 % NaCl<sub>eqv</sub>) to retrograde stage (365–375 °C, 3.1–3.7 % NaCl<sub>eqv</sub>), indicating potential mixing with meteoric waters. From retrograde to sulfide stage, both temperature and salinity decrease slightly (from 365–375 °C to 210–365 °C, and 3.1 %–3.7 % NaCl<sub>eqv</sub> to 0.3 %–2.6 % NaCl<sub>eqv</sub>, respectively), inferring that fluid cooling probably was the key factor for sulfide precipitation and associated In enrichment. The chlorite results show that, from bottom to top of the open pit, this variation in trace element concentrations is dominantly related to the decrease in temperature that occurs during the migration of hydrothermal fluid. The fluid temperatures correlate with increased In concentrations in sphalerite, suggesting temperature controls In enrichment. Additionally, the Ti/Sr ratio in chlorite indicate the possible hydrothermal center at the bottom of the Manjiazhai ore block (approximately 1152 m-depth), implying that the Dulong deposit is probably a distal skarn deposit.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"290 ","pages":"Article 106657"},"PeriodicalIF":2.7,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069550","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}

引用次数: 0

Revealing the shallow geometry of the Litang fault on the southeastern Qinghai-Tibet Plateau using multi-frequency ground Penetrating radar (GPR) profiles and trenching 利用多频探地雷达剖面和沟槽揭示青藏高原东南部理塘断裂的浅层几何形态

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-13 DOI: 10.1016/j.jseaes.2025.106658

Di Zhang , Zhonghai Wu , Jiacun Li , Jun Wang , Yan Lu

{"title":"Revealing the shallow geometry of the Litang fault on the southeastern Qinghai-Tibet Plateau using multi-frequency ground Penetrating radar (GPR) profiles and trenching","authors":"Di Zhang , Zhonghai Wu , Jiacun Li , Jun Wang , Yan Lu","doi":"10.1016/j.jseaes.2025.106658","DOIUrl":"10.1016/j.jseaes.2025.106658","url":null,"abstract":"<div><div>Subject to the severe and fragile natural environment on the Qinghai-Tibet Plateau, it was labour-intensive and time-consuming to obtain the detailed shallow geometry of the Litang fault for understanding the fault’s kinematics and characteristics using traditional methods. In this study, we presented a case study to investigate the detailed shallow geometry of the Litang fault using multi-frequency GPR profiles and trenching. The shallow geometry of active faults at variable depth with multi-spatial resolutions was revealed by multi-frequency GPR data. A deformation zone, two faults F1 and F2 and three stratigraphic units were identified in the 100 MHz GPR data, and the detailed subsurface information of the fault F1 was clearly discerned in the 250 MHz and 500 MHz GPR profiles with a better lateral and vertical resolution. In addition, the fault displacement of ∼ 0.2 m was verified in the 500 MHz GPR data through the interfaces of different stratigraphic units at the two flanks of the fault F1. The continuous horizontal radar reflections were bent downward when crossing the fault F1, and it indicated the fault F1 was dominated by the movement of the strike-slip fault with a thrust motion. A trenching section was implemented to provide additional information for better interpreting and understanding the GPR data. This study demonstrated that a combination of multi-frequency GPR profiles and trenching was suitable for depicting the detailed shallow geometry of the Litang fault on the Qinghai-Tibet Plateau, especially the geology conditions were complex or surface evidences were unobservable.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"290 ","pages":"Article 106658"},"PeriodicalIF":2.7,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069551","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}

引用次数: 0

Interplay between polyphase deformation and metamorphism of the NW Sanandaj-Sirjan Zone, Hamedan Area, Western Iran 伊朗西部哈马丹地区NW Sanandaj-Sirjan带多相变形与变质作用的相互作用

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-13 DOI: 10.1016/j.jseaes.2025.106655

Leili Izadi Kian , Mirmohammad Miri , Seyyed Ahmad Alavi , Ali A. Sepahi

{"title":"Interplay between polyphase deformation and metamorphism of the NW Sanandaj-Sirjan Zone, Hamedan Area, Western Iran","authors":"Leili Izadi Kian , Mirmohammad Miri , Seyyed Ahmad Alavi , Ali A. Sepahi","doi":"10.1016/j.jseaes.2025.106655","DOIUrl":"10.1016/j.jseaes.2025.106655","url":null,"abstract":"<div><div>Deciphering the interplay between deformation and metamorphism represents the key to unveil the tectono-metamorphic evolution of orogens. Despite the ongoing of high-resolution techniques and the ability to extract important information from small objects or sites, the integration of meso and microstructural analysis and the blasthesis deformation relations represents the starting point for further investigation. The Hamedan region in the Sanandaj-Sirjan Zone of the Zagros orogeny, western Iran, represents a natural laboratory where is possible to observe this interplay. In particulate, this region hosts the Middle Jurassic Alvand plutonic complex intruded into low- to high-grade regional metamorphic rocks. This study identified four stages of ductile deformation (D<sub>1</sub>–D<sub>4</sub>) characterized by folds (F<sub>1</sub>–F<sub>4</sub>), foliations (S<sub>1</sub>–S<sub>4</sub>), and lineations (L<sub>2</sub>–L<sub>4</sub>). The development of pre-, syn-, and post-tectonic garnet, andalusite, staurolite, and cordierite porphyroblasts is closely associated with these deformation stages. Type 3 interference patterns among F<sub>1</sub>, F<sub>2</sub>, and F<sub>3</sub> folds suggest a predominantly coaxial nature for D<sub>1</sub>, D<sub>2</sub>, and D<sub>3</sub> deformations. Syn-tectonic emplacement of the Alvand plutonic complex during D<sub>2</sub> caused significant rotation of structural elements in the host rocks. Our results emphasize the important of unravel the interplay between deformation, metamorphism, to reconstruct the tectono-metamorphic history of the Hamedan region and the emplacement of the Alvand plutonic complex. The plutonism reflects the regional tectonics driven by the subduction of the Neo-Tethys Ocean beneath the Iran microplate. The findings contribute to understanding the complex tectono-metamorphic evolution of the Sanandaj-Sirjan Zone and the broader Zagros orogeny.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"290 ","pages":"Article 106655"},"PeriodicalIF":2.7,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084294","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}

引用次数: 0

Paleozoic tectonic evolution in central Alborz (Iran): Continuous extension from Gondwanan active margin to Cimmerian passive margin 伊朗中部Alborz古生代构造演化：从Gondwanan活动边缘到Cimmerian被动边缘的持续延伸

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-12 DOI: 10.1016/j.jseaes.2025.106650

Asghar Dolati , Jeroen Smit , Akbar Jabbari , Alireza Shahidi

{"title":"Paleozoic tectonic evolution in central Alborz (Iran): Continuous extension from Gondwanan active margin to Cimmerian passive margin","authors":"Asghar Dolati , Jeroen Smit , Akbar Jabbari , Alireza Shahidi","doi":"10.1016/j.jseaes.2025.106650","DOIUrl":"10.1016/j.jseaes.2025.106650","url":null,"abstract":"<div><div>The Alborz Mountains of northern Iran are well known for inversion tectonics and active mountain building. The Paleozoic, pre-Cimmerian faults and basins played a key role in the Cimmerian and late Alpine-Himalayan orogenic phases. However, the Paleozoic structural geology and tectonic evolution of the Alborz Mountains have received comparatively little attention, despite their excellent preservation and extensive exposures. The aim of this paper is to elucidate the Paleozoic structural-tectonic framework and the transition of geodynamic regimes. To this end, we present the evolution of the Paleozoic stress field from paleostress analysis in central Alborz, supported by stratigraphic and petrologic studies. To obtain the highest possible temporal resolution and to exclude younger or potentially reactivated faults, each stress tensor represents a population of newly formed <em>syn</em>-depositional faults from a single formation.</div><div>The calculated paleostress tensors reveal a north–south extensional stress regime throughout the Paleozoic during successive geodynamic regimes, from the Gondwana active margin to the Cimmerian post-rift passive margin. The extension was accommodated by margin-parallel normal faults, including the major basin-bounding faults that were repeatedly reactivated during later phases of inversion and extension. The results indicate the absence of vertical axis rotations from later deformation phases, which is consistent with models for late Neogene internal deformation and oroclinal bending in the Alborz Mountains that place central Alborz at the hinge point between the rotating eastern and western branches.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"289 ","pages":"Article 106650"},"PeriodicalIF":2.7,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071004","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}

引用次数: 0

Corrigendum to “Insights into tectonic lineament patterns and crustal architectures beneath the carlsberg ridge: implications for mineral exploration” [J. Asian Earth Sci. 288 (2025) JAES_106602] 中国地质大学学报（自然科学版）[J]。亚洲地球科学，288 (2025)[j]

IF 2.7 3区地球科学

Journal of Asian Earth Sciences Pub Date : 2025-05-12 DOI: 10.1016/j.jseaes.2025.106640

Satya Narayan

引用次数: 0