It’s a trap!: Modern and ancient halite as Lagerstätten

IF 2 4区 地球科学 Q1 GEOLOGY
Martha E. Gibson, Kathleen C. Benison
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引用次数: 0

Abstract

ABSTRACT Chemical sediments, such as bedded halite (NaCl), are strongly influenced by environmental conditions during deposition and, if unaltered, may preserve microorganisms, microfossils, and organic compounds for hundreds of millions of years. Recent studies show that halite is an excellent repository for organic materials, as well as a variety of environmental data. Halite is a perfect trap. Due to its rapid growth, parent brine, gas, crystals of other minerals, and any organic material are encased within primary fluid inclusions or as solid inclusions along growth bands. These inclusions function as “snapshot” repositories of the hydrosphere, atmosphere, lithosphere, and biosphere. However, organic material in halite is still relatively unknown in the sedimentological and paleontological communities. Here, we present highlights of preservation in halite to showcase the diversity of life that has been documented within it. We also discuss: 1) the properties of halite that give it such excellent preservation potential, 2) the challenges to and strategies for studying organic material in halite, 3) preservation in other salt minerals such as gypsum, and 4) implications for astrobiological research. Recommendations for the future study of organic material in halite include collaboration amongst chemical sedimentologists, paleontologists, and microbiologists.
这是个陷阱!:现代和古代的岩石如Lagerstätten
化学沉积物,如层状盐岩(NaCl),在沉积过程中受到环境条件的强烈影响,如果不改变,可能会保存微生物、微化石和有机化合物数亿年。最近的研究表明,岩盐是一个极好的有机物质储存库,以及各种环境数据。盐岩是一个完美的陷阱。由于其生长迅速,母卤水、气体、其他矿物的晶体和任何有机物都被包裹在原生流体包裹体中,或沿着生长带包裹成固体包裹体。这些包裹体就像水圈、大气、岩石圈和生物圈的“快照”储存库。然而,在沉积学和古生物学界,岩盐中的有机物质仍然是相对未知的。在这里,我们将展示保存在岩盐中的亮点,以展示在岩盐中记录的生命多样性。我们还讨论了:1)岩盐的特性使其具有如此优异的保存潜力,2)研究岩盐中有机物质的挑战和策略,3)在其他盐矿物(如石膏)中的保存,以及4)对天体生物学研究的意义。对未来岩盐有机物质研究的建议包括化学沉积学家、古生物学家和微生物学家之间的合作。
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来源期刊
CiteScore
3.80
自引率
5.00%
发文量
50
审稿时长
3 months
期刊介绍: The journal is broad and international in scope and welcomes contributions that further the fundamental understanding of sedimentary processes, the origin of sedimentary deposits, the workings of sedimentary systems, and the records of earth history contained within sedimentary rocks.
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