cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/quxtrc
title: Composition of the genus Hanleya (Mollusca: Polyplacophora: Lepidopleurida), with the description of two new species

description: This dataset contains the digitized treatments in Plazi based on the original journal article Sirenko, Boris (2014): Composition of the genus Hanleya (Mollusca: Polyplacophora: Lepidopleurida), with the description of two new species. Journal of Natural History 48 (45 - 48): 2913-2945, DOI: 10.1080/00222933.2014.963722, URL: http://dx.doi.org/10.1080/00222933.2014.963722
DOI: 10.6084/m9.figshare.10011167.v1
title: U-Pb geochronology, petrogenesis and tectonomagmatic evolution of uppermost Neoproterozoic- lower Cambrian intrusive rocks in Kaboodan area, NE of Iran

description: This study presents new U-Pb zircons ages, trace element geochemistry, and Nd and Sr isotope compositions of intrusive rocks from the Kaboodan area, NE of Iran. The Kaboodan area embraces two geologically distinct zones of Taknar and Sabzevar. All intrusive rocks can be divided into two age groups, uppermost Neoproterozoic and Cretaceous, respectively. Uppermost Neoproterozoic and lower Cambrian plutonic rocks are found in the Taknar Zone section and include different mafic and felsic types. Mafic bodies include gabbroic- dioritic lithologies with ages around 552–545 Ma and low <sup>87</sup>Sr/<sup>86</sup>Sr<sub>i</sub> (0.7032–0.7041) and high ɛNd<sub>t</sub> (+4.82 to +8.49) values. These lithologies may have been generated by shallow depth partial melting of a spinel peridotite mantle source in an arc setting. Felsic intrusive rocks show two distinct U-Pb ages. The older granitoids (ONG) have uppermost Neoproterozoic age as the mafic rocks (549–547 Ma) while younger samples (YCG) have been formed ca. 20 m.y. later in the lower Cambrian (531–528 Ma). The ONG and YCG rocks show completely different geochemical characteristics. The ONG samples exhibit I-type granitoid properties with lower <sup>87</sup>Sr/<sup>86</sup>Sr<sub>i</sub> (0.704–0.707) and positive ɛNd<sub>t</sub> (+2.49 to +3.68) values, while YCG rocks display S-type granitoid signatures with higher <sup>87</sup>Sr/<sup>86</sup>Sr<sub>i</sub> (0.710–0.714) and negative ɛNd<sub>t</sub> (−4.54 and −6.95). The field relations, Sr-Nd isotope systematics, and geochemical variations indicate the interaction of the uppermost Neoproterozoic mafic and ONG units. The ONG melts were originated from the partial melting of mantle-derived material in a subduction zone. The trace element composition of the YCG samples is similar to within plate granitoids and was generated by the melting of meta-sedimentary crustal rocks during syn- to post-collisional events indicative of the end of Cadomian subduction at ∼ 530 Ma.
DOI: 10.6084/m9.figshare.12202406
title: Geochemistry and tectonic significance of the Fannuj-Maskutan SSZ-type ophiolite (Inner Makran, SE Iran)

description: The nature and geodynamic setting of Inner Makran ophiolites (SE Iran) are controversial and are the focus of a growing debate. The Fannuj-Maskutan ophiolite complex (central Inner Makran) is made up of lherzolites, harzburgites, layered and isotropic gabbros and diabase dikes and basaltic lavas. Here we present new textural description, mineral and whole-rock chemistry of peridotites together with bulk geochemistry of magmatic mafic rocks and U-Pb geochronology and Lu-Hf isotopes of inherited zircons in gabbros, with the aim to reconstruct the petrogenesis of the Fannuj-Maskutan ophiolite. The results indicate to a subduction-metasomatized depleted mantle source experienced 10–20% of partial melting. A transition from IAT-gabbros to E-MORB-basalts is also outlined. We interpret the obtained results as evidence for the Fannuj-Maskutan genesis in a supra-subduction zone (SSZ) basin developed in the Iranian cadomian crust as indicated by the presence of inherited Cadomian zircons (ca. 515 Ma, εHf<sub>(t)</sub>: −13.6 – +11.2). Comparing the Fannuj-Maskutan ophiolites to well-known SSZ-systems such as the South Sandwich SSZ, and integrating with the existing literature on Inner Makran ophiolite belt we interpret the Fannuj-Maskutan ophiolite as a part of a major SSZ-basin opened in the Iranian cadomian crust and evolved during the Neotethys subduction under Central Iran.
DOI: 10.6084/m9.figshare.7992095
title: Zircon U–Pb geochronology, major-trace elements and Sr–Nd isotope geochemistry of Mashhad granodiorites (NE Iran) and their mafic microgranular enclaves: evidence for magma mixing and mingling

description: Mashhad granitoids and associated mafic microgranular enclaves (MMEs), in NE Iran record late early Mesozoic magmatism, was related to the Palaeo-Tethys closure and Iran-Eurasia collision. These represent ideal rocks to explore magmatic processes associated with Late Triassic closure of the Palaeo-Tethyan ocean and post-collisional magmatism. In this study, new geochronological data, whole-rock geochemistry, and Sr–Nd isotope data are presented for Mashhad granitoids and MMEs. LA–ICP–MS U–Pb dating of zircon yields crystallization ages of 205.0 ± 1.3 Ma for the MMEs, indicating their formation during the Late Triassic. This age is similar to the host granitoids. Our results including the major and trace elements discrimination diagrams, in combination with field and petrographic observations (such as ellipsoidal MMEs with feldspar megacrysts, disequilibrium textures of plagioclase), as well as mineral chemistry, suggest that MMEs formed by mixing of mafic and felsic magmas. The host granodiorite is a felsic, high K calc-alkaline I-type granitoid, with SiO<sub>2</sub> = 67.5–69.4 wt%, high K<sub>2</sub>O (2.4–4.2 wt%), and low Mg# (42.5–50.5). Normalized abundances of LREEs and LILEs are enriched relative to HREEs and HFSEs (e.g. Nb, Ti). Negative values of whole-rock <i>ε</i>Nd<sub>(t)</sub> (−3 to −2.3) from granitoids indicate that the precursor magma was generated by partial melting of enriched lithospheric mantle with some contributions from old lower continental crust. In the MMEs, SiO<sub>2</sub> (53.4–58.2 wt%) is lower and Ni (3.9–49.7 ppm), Cr (0.8–93.9 ppm), Mg# (42.81–62.84), and <i>ε</i>Nd<sub>(t)</sub> (−2.3 to +1.4) are higher than those in the host granodiorite, suggesting a greater contribution of mantle-derived mafic melts in the genesis of MMEs.
DOI: 10.6084/m9.figshare.7992095.v1
title: Zircon U–Pb geochronology, major-trace elements and Sr–Nd isotope geochemistry of Mashhad granodiorites (NE Iran) and their mafic microgranular enclaves: evidence for magma mixing and mingling

description: Mashhad granitoids and associated mafic microgranular enclaves (MMEs), in NE Iran record late early Mesozoic magmatism, was related to the Palaeo-Tethys closure and Iran-Eurasia collision. These represent ideal rocks to explore magmatic processes associated with Late Triassic closure of the Palaeo-Tethyan ocean and post-collisional magmatism. In this study, new geochronological data, whole-rock geochemistry, and Sr–Nd isotope data are presented for Mashhad granitoids and MMEs. LA–ICP–MS U–Pb dating of zircon yields crystallization ages of 205.0 ± 1.3 Ma for the MMEs, indicating their formation during the Late Triassic. This age is similar to the host granitoids. Our results including the major and trace elements discrimination diagrams, in combination with field and petrographic observations (such as ellipsoidal MMEs with feldspar megacrysts, disequilibrium textures of plagioclase), as well as mineral chemistry, suggest that MMEs formed by mixing of mafic and felsic magmas. The host granodiorite is a felsic, high K calc-alkaline I-type granitoid, with SiO<sub>2</sub> = 67.5–69.4 wt%, high K<sub>2</sub>O (2.4–4.2 wt%), and low Mg# (42.5–50.5). Normalized abundances of LREEs and LILEs are enriched relative to HREEs and HFSEs (e.g. Nb, Ti). Negative values of whole-rock <i>ε</i>Nd<sub>(t)</sub> (−3 to −2.3) from granitoids indicate that the precursor magma was generated by partial melting of enriched lithospheric mantle with some contributions from old lower continental crust. In the MMEs, SiO<sub>2</sub> (53.4–58.2 wt%) is lower and Ni (3.9–49.7 ppm), Cr (0.8–93.9 ppm), Mg# (42.81–62.84), and <i>ε</i>Nd<sub>(t)</sub> (−2.3 to +1.4) are higher than those in the host granodiorite, suggesting a greater contribution of mantle-derived mafic melts in the genesis of MMEs.
DOI: 10.6084/m9.figshare.7992098.v1
title: Geochemistry and zircon U-Pb geochronology of Miocene plutons in the Urumieh-Dokhtar magmatic arc, east Tafresh, Central Iran

description: The Tafresh plutons that include Ahmadabab diorite, Vasfonjerd monzonite, Mehrezamin diorite and Chahak diorite, located to the east of Tafresh city, north-central Iran, are part of Urumieh-Dokhtar magmatic arc. U-Pb dating of zircon grains provides emplacement ages of 22.3 ± 1 Ma for the Ahmadabad diorite, and tightly clustered ages of 22.2 ± 0.2 Ma, 21.3 ± 0.2 Ma, and 21.7 ± 0.4 Ma for Vasfonjerd monzodiorite, Mehrezamin diorite-monzonite, and Chahak diorite-monzonite plutons, respectively. These rocks are metaluminous to weakly peraluminous, calc-alkaline, and characterized by enrichment in light rare earth elements, Nb-Ta negative anomalies, and high LILE/HFSE ratios. Tafresh plutonic rocks originated from a parental magma source and experienced different degrees of partial melting. Geochemical signatures of Tafresh plutonic rocks, such as a wide range of Y/Nb (2.7–8.4) and low Zr/Nb (19.5–35.) ratios, Nb/Ta (11.46–18.15), argue for mantle–crust interaction during generation of Tafresh magmas. Relatively low Nb/La ratios further indicate that the lithospheric mantle played a significant role in melt generation. HREE signatures (i.e. decrease Dy/Yb with increasing SiO<sub>2</sub>) preclude substantial involvement of garnet either in the residue, both during partial melting and fractionation of the magma. The plutons are a product of final stages of subduction-related magmatism prior to the collision between the Arabian and Eurasian tectonic plates.
DOI: 10.6084/m9.figshare.7094024.v1
title: U-Pb zircon dating, Sr-Nd isotope and petrogenesis of Sarduiyeh granitoid in SE of the UDMA, Iran: implication for the source origin and magmatic evolution

description: The Sarduiyeh granitoid (SG) is intruded in the southeastern part of the Dehaj-Sarduiyeh volcano-sedimentary belt in the southeastern end of the Urumieh-Dokhtar Magmatic Arc (UDMA) in Iran. The medium-to-coarse-grained granitoid unit, with granular texture consists mainly of diorite, tonalite, granodiorite and monzogranitic rocks. Mineralogically, these rocks consist mainly of plagioclase, K-feldspar, quartz, biotite and hornblende. The whole rock geochemical analyses indicates that the SG is calc-alkaline, I-type, metaluminous, enriched in large ion lithophile elements (LILE; such as K, Cs, Pb) and depleted in high field strength elements (HFSE; such as Ti, Nb, Ta, Zr). Chondrite normalized plot of SG rare earth elements (REE) show light rare earth element enrichments with (La<sub>N</sub>/Yb<sub>N</sub> = 2.44–8.68) and flat heavy rare earth element patterns with (Gd<sub>N</sub>/Yb<sub>N</sub> = 1.02–1.36). The rather high Y (<i>av</i>. 19.35 ppm), low Sr content (<i>av</i>. 293.76 ppm) and low Cr and Ni contents (<i>av</i>. 20.1 and 4.69 ppm, respectively) of the SG demonstrate its normal calc-alkaline and non-adakitic nature, the features of Jebal Barez-type granitoids. The geochemical characteristics and isotopic composition, low I<sub>Sr</sub> (0.7046–0.7049) and positive ɛ<sup>t</sup>Nd (+3.4 to +4.03) values, of the SG suggest that its parental magma formed as a result of partial melting from metabasic rocks of lower crust in a subduction-related arc setting. Fractionation of an assemblage dominated by plagioclase, K-feldspar, amphibole and magnetite may have been responsible for the evolution of the SG magma. U-Pb zircon geochronology gives an age of 27.95 ± 0.27 Ma for the SG, suggesting that the final collision between the Arabian plate and Central Iranian microcontinent may have happened in the Late Oligocene.
DOI: 10.6084/m9.figshare.7992098
title: Geochemistry and zircon U-Pb geochronology of Miocene plutons in the Urumieh-Dokhtar magmatic arc, east Tafresh, Central Iran

description: The Tafresh plutons that include Ahmadabab diorite, Vasfonjerd monzonite, Mehrezamin diorite and Chahak diorite, located to the east of Tafresh city, north-central Iran, are part of Urumieh-Dokhtar magmatic arc. U-Pb dating of zircon grains provides emplacement ages of 22.3 ± 1 Ma for the Ahmadabad diorite, and tightly clustered ages of 22.2 ± 0.2 Ma, 21.3 ± 0.2 Ma, and 21.7 ± 0.4 Ma for Vasfonjerd monzodiorite, Mehrezamin diorite-monzonite, and Chahak diorite-monzonite plutons, respectively. These rocks are metaluminous to weakly peraluminous, calc-alkaline, and characterized by enrichment in light rare earth elements, Nb-Ta negative anomalies, and high LILE/HFSE ratios. Tafresh plutonic rocks originated from a parental magma source and experienced different degrees of partial melting. Geochemical signatures of Tafresh plutonic rocks, such as a wide range of Y/Nb (2.7–8.4) and low Zr/Nb (19.5–35.) ratios, Nb/Ta (11.46–18.15), argue for mantle–crust interaction during generation of Tafresh magmas. Relatively low Nb/La ratios further indicate that the lithospheric mantle played a significant role in melt generation. HREE signatures (i.e. decrease Dy/Yb with increasing SiO<sub>2</sub>) preclude substantial involvement of garnet either in the residue, both during partial melting and fractionation of the magma. The plutons are a product of final stages of subduction-related magmatism prior to the collision between the Arabian and Eurasian tectonic plates.
DOI: 10.6084/m9.figshare.7094024
title: U-Pb zircon dating, Sr-Nd isotope and petrogenesis of Sarduiyeh granitoid in SE of the UDMA, Iran: implication for the source origin and magmatic evolution

description: The Sarduiyeh granitoid (SG) is intruded in the southeastern part of the Dehaj-Sarduiyeh volcano-sedimentary belt in the southeastern end of the Urumieh-Dokhtar Magmatic Arc (UDMA) in Iran. The medium-to-coarse-grained granitoid unit, with granular texture consists mainly of diorite, tonalite, granodiorite and monzogranitic rocks. Mineralogically, these rocks consist mainly of plagioclase, K-feldspar, quartz, biotite and hornblende. The whole rock geochemical analyses indicates that the SG is calc-alkaline, I-type, metaluminous, enriched in large ion lithophile elements (LILE; such as K, Cs, Pb) and depleted in high field strength elements (HFSE; such as Ti, Nb, Ta, Zr). Chondrite normalized plot of SG rare earth elements (REE) show light rare earth element enrichments with (La<sub>N</sub>/Yb<sub>N</sub> = 2.44–8.68) and flat heavy rare earth element patterns with (Gd<sub>N</sub>/Yb<sub>N</sub> = 1.02–1.36). The rather high Y (<i>av</i>. 19.35 ppm), low Sr content (<i>av</i>. 293.76 ppm) and low Cr and Ni contents (<i>av</i>. 20.1 and 4.69 ppm, respectively) of the SG demonstrate its normal calc-alkaline and non-adakitic nature, the features of Jebal Barez-type granitoids. The geochemical characteristics and isotopic composition, low I<sub>Sr</sub> (0.7046–0.7049) and positive ɛ<sup>t</sup>Nd (+3.4 to +4.03) values, of the SG suggest that its parental magma formed as a result of partial melting from metabasic rocks of lower crust in a subduction-related arc setting. Fractionation of an assemblage dominated by plagioclase, K-feldspar, amphibole and magnetite may have been responsible for the evolution of the SG magma. U-Pb zircon geochronology gives an age of 27.95 ± 0.27 Ma for the SG, suggesting that the final collision between the Arabian plate and Central Iranian microcontinent may have happened in the Late Oligocene.
DOI: 10.6084/m9.figshare.11708925
title: Neoproterozoic and Cambro-Ordovician magmatism: episodic growth and reworking of continental crust, Himachal Himalaya, India

description: U-Pb SHRIMP and LA-MC-ICP-MS zircon dates from Dalhousie and Dhauladhar granite yield weighted mean ages of 900 to 700 Ma for magmatic cores. The rim has an age of 460 Ma age, representing the time of reworking of early Neoproterozoic bodies during Cambro-Ordovician time. The plutons are composed of granite, monzogranite, and granodioritic having a peraluminous character with pronounced Eu anomaly. Higher Rb content and Rb/Sr ratio along with REE enrichment in Dalhousie granite show that the body is more evolved than Dhauladhar granite. New U-Pb data from Dalhousie and Dhauladhar areas suggest that Cambro-Ordovician continental magmatism took place within the Greater India by reworking of already existing Neoproterozoic granite. These two magmatic episodes can be correlated with the amalgamation of Gondwanaland over granite that formed during the Rodinia break-up.
DOI: 10.6084/m9.figshare.11708925.v1
title: Neoproterozoic and Cambro-Ordovician magmatism: episodic growth and reworking of continental crust, Himachal Himalaya, India

description: U-Pb SHRIMP and LA-MC-ICP-MS zircon dates from Dalhousie and Dhauladhar granite yield weighted mean ages of 900 to 700 Ma for magmatic cores. The rim has an age of 460 Ma age, representing the time of reworking of early Neoproterozoic bodies during Cambro-Ordovician time. The plutons are composed of granite, monzogranite, and granodioritic having a peraluminous character with pronounced Eu anomaly. Higher Rb content and Rb/Sr ratio along with REE enrichment in Dalhousie granite show that the body is more evolved than Dhauladhar granite. New U-Pb data from Dalhousie and Dhauladhar areas suggest that Cambro-Ordovician continental magmatism took place within the Greater India by reworking of already existing Neoproterozoic granite. These two magmatic episodes can be correlated with the amalgamation of Gondwanaland over granite that formed during the Rodinia break-up.
DOI: 10.6084/m9.figshare.11357600
title: Large-scale early cretaceous lower-crust melting derived adakitic rocks in NE China: implications for convergent bidirectional subduction and slab rollback

description: Large volumes of Early Cretaceous adakitic rocks crop out in northeast China. In this paper, we summarize their spatial-temporal distribution and geochemical characteristics. These adakitic rocks exhibit variable MgO, Cr and Ni contents, as well as potassium enrichments, in contrasting with those of the slab melting derived adakites. Positive ε<sub>Nd</sub>(t) and ε<sub>Hf</sub>(t) values and low <sup>87</sup>Sr/<sup>86</sup>Sr(i) indicate significant Phanerozoic crust growth in NE China. Based on their geochemistry, these adakitic rocks are mainly derived from partial melting of juvenile lower crust. We interpret the melting to have resulted from extension and associated delamination. The ages of adakitic rocks are 141–120 Ma in the Xing’an region, 129–113 Ma in the Songliao basin, and 113–90 Ma in the Jiamusi region. Based on the lower-crustal-melting geochemical characteristics and spatial distribution of ages, we propose a new two-stage convergent bidirectional subduction model: Mongol-Okhotsk oceanic plate subduction and associated slab rollback in the west from 141–114 Ma and the Paleo-Pacific oceanic plate subduction and associated slab rollback in the east from 113–90 Ma.
DOI: 10.6084/m9.figshare.11357600.v1
title: Large-scale early cretaceous lower-crust melting derived adakitic rocks in NE China: implications for convergent bidirectional subduction and slab rollback

description: Large volumes of Early Cretaceous adakitic rocks crop out in northeast China. In this paper, we summarize their spatial-temporal distribution and geochemical characteristics. These adakitic rocks exhibit variable MgO, Cr and Ni contents, as well as potassium enrichments, in contrasting with those of the slab melting derived adakites. Positive ε<sub>Nd</sub>(t) and ε<sub>Hf</sub>(t) values and low <sup>87</sup>Sr/<sup>86</sup>Sr(i) indicate significant Phanerozoic crust growth in NE China. Based on their geochemistry, these adakitic rocks are mainly derived from partial melting of juvenile lower crust. We interpret the melting to have resulted from extension and associated delamination. The ages of adakitic rocks are 141–120 Ma in the Xing’an region, 129–113 Ma in the Songliao basin, and 113–90 Ma in the Jiamusi region. Based on the lower-crustal-melting geochemical characteristics and spatial distribution of ages, we propose a new two-stage convergent bidirectional subduction model: Mongol-Okhotsk oceanic plate subduction and associated slab rollback in the west from 141–114 Ma and the Paleo-Pacific oceanic plate subduction and associated slab rollback in the east from 113–90 Ma.
DOI: 10.6084/m9.figshare.12854168
title: On the firing line – interactions between hunting frogs and Odonata

description: Frogs are important predators of Odonata. We investigated frogs catching Odonata prey by means of slow-motion filming in the field in order to understand the prey–predator interactions. In particular, we aimed to analyse kinematics of captures, and of Odonata fleeing, through evaluation of frame-by-frame filming; 122 (20%) of 613 events were analysed. While dragonflies were ovipositing, frogs were sitting and waiting motionless, or they sneaked slowly towards the intended prey. The speed of the lashing tongue was much higher than the start and flight velocities of Odonata during escape attempts. The reaction time of Odonata was around 45×10<sup>–</sup>3 s, and it was not correlated to capture rate. The fleeing behaviour of Odonata cannot be considered to be stereotypical. The usual fleeing measure was to evade sideways to the jump direction of the frog, with the individual turning their body to one side and flying away from the frog. Perched odonates escaped by overturning to one side, sometimes falling into the water, or by flying in a loop. To escape, individuals were observed flying backward with the head down, in two cases. From the video clips, capture rates were counted. Large Anisoptera escaped more often than small Zygoptera. <i>Anax imperator</i> females mostly escaped after capture by fighting with strong wing beats, even when pulled under water by the frog.
DOI: 10.6084/m9.figshare.12854168.v1
title: On the firing line – interactions between hunting frogs and Odonata

description: Frogs are important predators of Odonata. We investigated frogs catching Odonata prey by means of slow-motion filming in the field in order to understand the prey–predator interactions. In particular, we aimed to analyse kinematics of captures, and of Odonata fleeing, through evaluation of frame-by-frame filming; 122 (20%) of 613 events were analysed. While dragonflies were ovipositing, frogs were sitting and waiting motionless, or they sneaked slowly towards the intended prey. The speed of the lashing tongue was much higher than the start and flight velocities of Odonata during escape attempts. The reaction time of Odonata was around 45×10<sup>–</sup>3 s, and it was not correlated to capture rate. The fleeing behaviour of Odonata cannot be considered to be stereotypical. The usual fleeing measure was to evade sideways to the jump direction of the frog, with the individual turning their body to one side and flying away from the frog. Perched odonates escaped by overturning to one side, sometimes falling into the water, or by flying in a loop. To escape, individuals were observed flying backward with the head down, in two cases. From the video clips, capture rates were counted. Large Anisoptera escaped more often than small Zygoptera. <i>Anax imperator</i> females mostly escaped after capture by fighting with strong wing beats, even when pulled under water by the frog.