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Metamorphic CO2 Production in Collisional Orogens: Petrological Constraints from Phase Diagram Modeling of Himalayan, Scapolite-bearing, Calc-silicate Rocks in the NKC(F)MAS(T)-HC system

Published on Jan 1, 2017in Journal of Petrology3.38
路 DOI :10.1093/petrology/egx005
Chiara Groppo21
Estimated H-index: 21
(UNITO: University of Turin),
Franco Rolfo18
Estimated H-index: 18
(UNITO: University of Turin)
+ 1 AuthorsPietro Mosca8
Estimated H-index: 8
Abstract
  • References (94)
  • Citations (6)
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References94
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The Tibetan Plateau is one of the most geologically dynamic systems and the highest plateau in the world with ongoing three-dimensional crustal deformation. The Plateau is uplifting and deforming horizontally as observed by present-day global navigation satellite system (GNSS) and repeated leveling measurements. Crustal mass is conservative and less dense than the mantle, thus the horizontal shortening must be accompanied by crustal thickening and horizontal extrusion. According to the level of ...
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Last. K. P. Kaphle (Geological Society of America)H-Index: 1
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A number of studies suggest that mountain ranges have strong impact on the global carbon cycle; metamorphic degassing from active collisional orogens supplies a significant fraction of the global solid-Earth derived CO2 to the atmosphere, thus playing a fundamental role even in today鈥檚 Earth carbon cycle. The Himalayan belt, a major collisional orogen still active today, is a likely candidate for the production of a large amount of metamorphic CO2 that may have caused changes in long-term climat...
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#1Cl茅ment Ganino (University of Nice Sophia Antipolis)H-Index: 6
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Analysis of magmatic and sedimentary rocks of several large igneous provinces has demonstrated that the release of gas during plutonic-metamorphic processes may be linked to global climate change and mass extinctions. Aguablanca, one of the largest Cu鈥揘i鈥揚GE deposits in Europe, formed during the Variscan orogeny when a mafic magma intruded limestones and shales, creating a contact aureole composed of marble, skarn and hornfels. Our petrological and geochemical investigation of the aureole provid...
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#1D. Craw (University of Otago)H-Index: 1
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Hydrothermal graphite has been added to a regional-scale postmetamorphic fault zone in the High Himalaya. Fault rocks contain graphite veins and cement that locally constitute >50% of the rock. Individual graphite veins are as much as 1 cm wide, and are locally almost pure graphite, with minor muscovite and anatase. Hydrothermal graphite grain size (10鈥500 碌m) is substantially greater than background metamorphosed organic matter (鈭1 碌m). The graphite is crystallographically disordered, and has m...
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#1Jianping Zheng (China University of Geosciences)H-Index: 34
#2Huayun Tang (China University of Geosciences)H-Index: 18
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The collision between the North and South China cratons in Middle Triassic time (240鈥225 Ma) created the world鈥檚 largest belt of ultrahigh-pressure (UHP) metamorphism. U鈥揚b ages, Hf isotope systematics and trace element compositions of zircons from the Xugou, Yangkou and Hujialing peridotites in the Sulu UHP terrane mainly record a ~470 Ma tectonothermal event, coeval with the Early Paleozoic kimberlite eruptions within the North China craton. This event is interpreted as the result of metasomat...
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The Himalayan range exposes a spectacular assemblage of metamorphic rocks from the mid- and deep crust that have fostered numerous models of how the crust responds to continental collisions. Recent petrogenetically based petrologic and geochronologic studies elucidate processes with unprecedented resolution and critically test models that range from continuum processes to one-time events. The pronounced metamorphic inversion across the Main Central Thrust reflects continuum thrusting between ca....
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Last. Manuel Moreira (IPGP: Institut de Physique du Globe de Paris)H-Index: 31
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The Syabru-Bensi hydrothermal system (SBHS), located at the Main Central Thrust zone in central Nepal, is characterized by hot (30鈥62掳C) water springs and cold (<35掳C) carbon dioxide (CO2) degassing areas. From 2007 to 2011, five gas zones (GZ1鈥揋Z5) were studied, with more than 1600 CO2 and 850 radon flux measurements, with complementary self-potential data, thermal infrared imaging, and effective radium concentration of soils. Measurement uncertainties were evaluated in the field. CO2 and radon...
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Satellite measurements of global aerosol properties are very useful in constraining aerosol parameterization in climate models. The reliability of different data sets in representing global and regional aerosol variability becomes an essential question. In this study, we present the results of a comparison using combined principal component analysis (CPCA), applied to monthly mean, mapped (Level 3) aerosol optical depth (AOD) product from Moderate Resolution Imaging Spectroradiometer (MODIS), Mu...
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#1Pietro MoscaH-Index: 8
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The spatial distribution of reactants and products of infiltrationdriven decarbonation reactions can be a record of the geometry and amount of reactive fluid flow during regional metamorphism. In the past, these distributions have been interpreted assuming (1) minerals are fixed in composition and (2) single layers are chemically isolated. Because neither assumption is normally valid, new transport models were developed that specifically predict the spatial distribution of reactants and products...
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Abstract Carbon dioxide (CO2) concentration (CDC) is an essential parameter of underground atmospheres for safety and cave heritage preservation. In the Chauvet cave (South France), a world heritage site hosting unique paintings dated 36,000鈥痽ears BP, a high-sensitivity monitoring, ongoing since 1997, revealed: 1) two compartments with a spatially uniform CDC, a large volume (A) (40,000 to 80,000鈥痬3) with a mean value of 2.20鈥扁0.01% vol. in 2016, and a smaller remote room (B) (2000鈥痬3), with a ...
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Abstract The pressure, temperature, and timing (P-T-t) conditions at which CO 2 was produced during the Himalayan prograde metamorphism have been constrained, focusing on the most abundant calc-silicate rock type in the Himalaya. A detailed petrological modeling of a clinopyroxene聽+聽scapolite聽+聽K-feldspar聽+聽plagioclase聽+聽quartz聽卤聽calcite calc-silicate rock allowed the identification and full characterization 鈥 for the first time 鈥 of different metamorphic reactions leading to the simultaneous gr...
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