Franco Rolfo
University of Turin
GeomorphologyGeologyGeochemistryMetamorphic rockPetrology
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Publications 94
#2Yang YangH-Index: 1
Last. Franco RolfoH-Index: 18
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Corundum-bearing anatectic aluminous rocks are exposed in the deeply subducted North Dabie complex zone (NDZ), of Central China. The rocks consist of corundum, biotite, K-feldspar and plagioclase, and show clear macro- and micro-structural evidence of anatexis by dehydration melting of muscovite in the absence of quartz. Mineral textures and chemical data integrated with phase equilibria modeling, indicate that coarse-grained corundum in leucosome domains is a peritectic phase, reflecting dehydr...
Abstract This study presents new data sets on the petrological, fluid inclusion and U-Pb zircon geochronological aspects of the garnet-bearing amphibolites from the eastern Karakorum (Pangong-Tso), Ladakh. to delineate the P-T-t-fluid evolution and its tectonic implications. The calculated phase equilibria in the model system NCKFMASHTO reveal that the peak metamorphism occurred at 8.5–9.5 kbar, 630–655°C, and retrograde metamorphism crossed a stage at 5.5–5.7 kbar, 620–630 °C. Monophase primary...
#1Yuan Li (USTC: University of Science and Technology of China)H-Index: 2
#2Yican Liu (USTC: University of Science and Technology of China)H-Index: 17
Last. Chiara Groppo (UNITO: University of Turin)H-Index: 21
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Abstract A combined geochemical (whole-rock elements and Sr-Nd-Pb isotopes, zircon trace elements and Hf isotopes) and geochronological (zircon U–Pb ages) study was carried out on the relatively low-grade meta-basites and meta-granitoids from Longjingguan within the central Dabie ultrahigh-pressure (UHP) metamorphic zone, east-central China. Zircon investigations indicate that the meta-basites were formed at ∼772 Ma and subsequently experienced granulite-facies metamorphism at ∼768 Ma and a late...
#1Liang-Peng Deng (CUTe: China University of Technology)H-Index: 2
#2Yican Liu (USTC: University of Science and Technology of China)H-Index: 17
Last. Xiao-Feng Gu (USTC: University of Science and Technology of China)H-Index: 7
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1 CitationsSource
#1Chiara Groppo (UNITO: University of Turin)H-Index: 21
#2Franco Rolfo (UNITO: University of Turin)H-Index: 18
Last. Matthew A. Coble (Stanford University)H-Index: 10
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Abstract The Tibetan Plateau, largely derived from the accretion of several Gondwana microplates to the southern margin of Asia since the late Palaeozoic, is the highest and largest topographic relief on Earth. Although the first order geodynamic processes responsible for its pre-Cenozoic evolution are quite well-known, many issues are still debated, among which is the timing of collision of each terrane with the southern margin of Asia. Even more uncertain is the pre-Palaeozoic history of these...
#1Frédéric Girault (IPGP: Institut de Physique du Globe de Paris)H-Index: 14
#2Lok Bijaya Adhikari (Kathmandu)H-Index: 6
Last. Frédéric Perrier (IPGP: Institut de Physique du Globe de Paris)H-Index: 24
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Fluid–earthquake interplay, as evidenced by aftershock distributions or earthquake-induced effects on near-surface aquifers, has suggested that earthquakes dynamically affect permeability of the Earth’s crust. The connection between the mid-crust and the surface was further supported by instances of carbon dioxide (CO2) emissions associated with seismic activity, so far only observed in magmatic context. Here we report spectacular non-volcanic CO2 emissions and hydrothermal disturbances at the f...
3 CitationsSource
#1Yican Liu (USTC: University of Science and Technology of China)H-Index: 17
#2Pin-Gang Zhang (USTC: University of Science and Technology of China)H-Index: 3
Last. Biao SongH-Index: 1
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Abstract Impure calcite marbles from the Precambrian metamorphic basement of the Wuhe Complex, southeastern margin of the North China Craton, provide an exceptional opportunity to understand the depositional processes during the Late Archean and the subsequent Palaeoproterozoic metamorphic evolution of one of the oldest cratons in the world. The studied marbles are characterized by the assemblage calcite + clinopyroxene + plagioclase + K-feldspar + quartz + rutile ± biotite ± white mica. Based o...
6 CitationsSource
#1Himanshu K. Sachan (Wadia Institute of Himalayan Geology)H-Index: 12
#2Aditya Kharya (Wadia Institute of Himalayan Geology)H-Index: 2
Last. Sameer K. Tiwari (Wadia Institute of Himalayan Geology)H-Index: 3
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Abstract The best occurrence of blueschist-facies lithologies in Himalaya is that of the Shergol Ophiolitic Melange along the Indus suture zone in Ladakh region of north-western India. These lithologies are characterized by well preserved lawsonite-glaucophane-garnet-quartz assemblages. This paper presents for the first time the results of a detailed fluid inclusion study on these lithologies, in order to understand the fluid P-T evolution and its tectonic implications. The blueschist rocks from...
#1Liang-Peng Deng (USTC: University of Science and Technology of China)H-Index: 2
#2Yican Liu (USTC: University of Science and Technology of China)H-Index: 17
Last. Franco Rolfo (UNITO: University of Turin)H-Index: 18
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Abstract Ultrahigh-pressure (UHP) metamorphic rocks are distinctive products of crustal deep subduction, and are mainly exposed in continental subduction-collision terranes. UHP slices of continental crust are usually involved in multistage exhumation and partial melting, which has obvious influence on the rheological features of the rocks, and thus significantly affect the dynamic behavior of subducted slices. Moreover, partial melting of UHP rocks have significant influence on element mobility...
2 CitationsSource
The Tista River originates from glaciers in the North Sikkim (India) and flows towards southwest draining most of the Himalaya tectonic units up to Triveni locality, where it is joined by the Rangit River (its larger tributary). Tista fluvial profile has moderate concavity (θ = 0.39) and high steepness indices (ksn = 380). In Sikkim, Tista sand is characterized by quartz, feldspars and high-rank metamorphic rock fragments from the Higher Himalayan Crystallines. After Triveni, Tista River leaves ...
4 CitationsSource