Mineralogy of Tagish Lake: An ungrouped type 2 carbonaceous chondrite
摘要:
Abstract— In this paper we describe the recovery, handling and preliminary mineralogical investigation of the Tagish Lake meteorite. Tagish Lake is a type 2 carbonaceous chondrite which bears similarities to CI1 and CM chondrite groups, but is distinct from both. Abundant phyllosilicates as well as chondrules (however sparse) and common olivine grains in the matrix preclude any other classification. The bulk density of Tagish Lake (1.67 g/cc) is far lower than CI or CM chondrites (2.2‐2.3 and 2.6‐2.9 g/cc, respectively), or any other meteorite for that matter. We have identified two lithologies: a dominant carbonate‐poor lithology and a less‐abundant carbonate‐rich lithology. The meteorite is a breccia at all scales.We have noted similarities between Tagish Lake and some clasts within the enigmatic meteorite Kaidun; possibly there are genetic relationships here worth exploring. In the paper we describe a clast of CM1 material within Tagish Lake which is very similar to a major lithology in Kaidun.
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<sub>4</sub>
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作者:Dong‐Huang Liu、Tobin J. Marks、Zhi Li
DOI:10.1002/cssc.201902137
日期:2019.12.19
conversion of renewable biomass platform chemicals into high-quality fuels remains challenging. A one-pot catalytic approach has been developed to synthesize various structurally defined biofuels by using Hf(OTf)4 and Pd/C for selective tandem catalysis and 2-methylfuran (2-MF) as a renewable feedstock. 2-MF first undergoes Lewis acid-catalyzed hydroxyalkylation/alkylation (HAA) condensation with carbonyl
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作者:Avelino Corma、Olalla de la Torre、Michael Renz、Nicolas Villandier
DOI:10.1002/anie.201007508
日期:2011.3.1
High‐quality liquid fuels are obtained from non‐edible carbohydrates by energy‐efficient processes. 2‐Methylfuran, produced by hydrogenation of furfural, is converted into 6‐alkyl undecanes in a catalytic solvent‐free process (see scheme with 6‐butylundecane). A diesel fuel is produced with an excellent motor cetane number (71) and pour point (−90 °C) and with global process conversions and selectivities
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DOI:10.1021/jo00836a031
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Mineralogy of Tagish Lake: An ungrouped type 2 carbonaceous chondrite
作者:M. E. Zolensky、K. Nakamura、M. Gounelle、T. Mikouchi、T. Kasama、O. Tachikawa、E. Tonui
DOI:10.1111/j.1945-5100.2002.tb00852.x
日期:2002.5
Abstract— In this paper we describe the recovery, handling and preliminary mineralogical investigation of the Tagish Lake meteorite. Tagish Lake is a type 2 carbonaceous chondrite which bears similarities to CI1 and CM chondrite groups, but is distinct from both. Abundant phyllosilicates as well as chondrules (however sparse) and common olivine grains in the matrix preclude any other classification. The bulk density of Tagish Lake (1.67 g/cc) is far lower than CI or CM chondrites (2.2‐2.3 and 2.6‐2.9 g/cc, respectively), or any other meteorite for that matter. We have identified two lithologies: a dominant carbonate‐poor lithology and a less‐abundant carbonate‐rich lithology. The meteorite is a breccia at all scales.We have noted similarities between Tagish Lake and some clasts within the enigmatic meteorite Kaidun; possibly there are genetic relationships here worth exploring. In the paper we describe a clast of CM1 material within Tagish Lake which is very similar to a major lithology in Kaidun.