Journal Articles (Earth and Atmospheric Sciences)
Items in this Collection
- 3Nitrogen isotope fractionation
- 2Ammonium
- 1Abiotic nitrogen reduction
- 1Ammonia degassing
- 1Blueschist
- 1Canadian Shield
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Efficient Carbon Recycling at the Central‐Northern Lesser Antilles Arc: Implications to Deep Carbon Recycling in Global Subduction Zones
Download2020-04-23
Li, Kan, Li, Long, Aubaud, Cyril, Muehlenbachs, Karlis
Carbon recycling efficiency of arc (CREA) is an important parameter to assess the recycling of slab carbon into Earth's deep interior. Although previous studies observed variable degrees of recycled slab carbon at global arcs, the CREA value of any individual subduction zone has not been obtained...
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Experimental investigation of formation and decomposition of roaldite in ammonia atmosphere at 300–700 °C and associated nitrogen isotope fractionations
Download2021-05-01
Li, Long, Cartigny, Pierre, Li, Kan
Roaldite (Fe4N) is one of the few nitride minerals found in meteorites. Their nitrogen (N) isotopic signatures carry important information for understanding the early N cycle in the proto-solar nebula. However, the lack of knowledge on the N isotopic effects from nitride formation to its survival...
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First-principles calculations of equilibrium nitrogen isotope fractionations among aqueous ammonium, silicate minerals and salts
Download2021-03-15
Li, Yonghui, Li, Long, Wu, Zhongqing
Nitrogen isotopes are a robust tool to study geological nitrogen cycle between Earth’s reservoirs. However, the application of nitrogen isotope system to understanding geological processes has been limited by the lack of constraints on equilibrium isotope fractionation factors between mineral and...
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In situ oxidation of sulfide minerals supports widespread sulfate reducing bacteria in the deep subsurface of the Witwatersrand Basin (South Africa): Insights from multiple sulfur and oxygen isotopes
Download2022-01-01
Li, Long, Wei, Siwen, Lollar, Barbara Sherwood, Wing, Boswell, Bui, Thi H., Ono, Shuhei, Lau Vetter, Maggie C. Y., Onstott, Tullis C., Kieft, Thomas L., Borgonie, Gaetan, Linage-Alvarez, Borja, Kuloyo, Olukayode, van Heerden, Esta
Dissolved sulfate is a crucial electron acceptor for the subsurface biosphere, particularly for the living microbial ecosystems in the long-isolated (on the order of millions to billions of years) deep subsurface fracture waters in Precambrian cratons, e.g., in the Witwatersrand Basin of the...
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Intraslab remobilization of nitrogen during early subduction facilitates deep nitrogen recycling: Insights from the blueschists in the Heilongjiang Complex in NE China
Download2021-11-20
Li, Kan, Li, Gong-Yu, Du, Yi-Fan, Han, Wei, Zhang, Ji, Chen, Li-Hui, Zhou, Jian-Bo, Li, Long
Nitrogen (N) in subducting slab resides in both sediments and altered oceanic crust (AOC). The extent of subduction-zone metamorphic devolatilization of N in these reservoirs determines the amount of remaining N for deep recycling. However, N behavior inside the subduction zone, particularly...
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N2 in deep subsurface fracture fluids of the Canadian Shield: Source and possible recycling processes
Download2021-12-20
Li, Long, Li, Kan, Giunta, Thomas, Warr, Oliver, Labidi, Jabrane, Lollar, Barbara Sherwood
In addition to high concentrations of CH4 and H2, abundant dissolved N2 is found in subsurface fracture fluids in Precambrian cratons around the world. These fracture fluids have hydrogeological isolation times on order of thousands to millions and even billions of years. Assessing the sources...
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Nitrogen isotope fractionations among gaseous and aqueous NH4+, NH3, N2, and metal-ammine complexes: Theoretical calculations and applications
Download2021-02-15
Li, Long, He, Yuyang, Zhang, Zhe, Liu, Yun
Ammonium (NH4+), ammonia (NH3) and N2 are key nitrogen species in geological nitrogen recycling. NH3 has also been proposed to play an important role in mobilizing base metals in the form of metal-ammine complexes in hydrothermal fluids. The nitrogen isotope fractionation factors among these...
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Recommendations for offline combustion-based nitrogen isotopic analysis of silicate minerals and rocks
Download2021-03-01
Li, Long, Li, Kan, Li, Yingzhou, Du, Yifan, Labbe, Mark
Rationale Due to isotope fractionations during partial nitrogen release from minerals and rocks, the complete extraction of nitrogen for analysis is crucial to ensure high-quality nitrogen isotopic data. However, the appropriate nitrogen extraction conditions (e.g. temperature, duration) have not...