Shaping of the Present-Day Deep Biosphere at Chicxulub by the Impact Catastrophe That Ended the Cretaceous

被引：10

作者：

Cockell, Charles S. ^{[1
]}

Schaefer, Bettina ^{[2
]}

Wuchter, Cornelia ^{[2
]}

Coolen, Marco J. L. ^{[2
]}

Grice, Kliti ^{[2
]}

Schnieders, Luzie ^{[3
]}

Morgan, Joanna V. ^{[4
]}

Gulick, Sean P. S. ^{[5
,6
,7
]}

Wittmann, Axel ^{[8
]}

Lofi, Johanna ^{[9
]}

Christeson, Gail L. ^{[5
]}

Kring, David A. ^{[10
]}

Whalen, Michael T. ^{[11
]}

Bralower, Timothy J. ^{[12
]}

Osinski, Gordon R. ^{[13
,14
]}

Claeys, Philippe ^{[15
]}

Kaskes, Pim ^{[15
]}

de Graaff, Sietze J. ^{[15
]}

Dehais, Thomas ^{[15
]}

Goderis, Steven ^{[15
]}

Hernandez Becerra, Natali ^{[16
]}

Nixon, Sophie ^{[16
]}

机构：

[1] Univ Edinburgh, Sch Phys & Astron, UK Ctr Astrobiol, Edinburgh, Midlothian, Scotland

[2] Curtin Univ, Inst Geosci Res, Sch Earth & Planetary Sci, WA Organ & Isotope Geochem Ctr WA OIGC, Bentley, WA, Australia

[3] Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany

[4] Imperial Coll London, Dept Earth Sci & Engn, London, England

[5] Univ Texas Austin, Inst Geophys, Jackson Sch Geosci, Austin, TX USA

[6] Univ Texas Austin, Dept Geol Sci, Jackson Sch Geosci, Austin, TX USA

[7] Univ Texas Austin, Ctr Planetary Syst Habitabil, Austin, TX 78712 USA

[8] Arizona State Univ, Eyring Mat Ctr, Tempe, AZ USA

[9] Univ Montpellier, CNRS, Geosci Montpellier, Montpellier, France

[10] Lunar & Planetary Inst, 3303 NASA Rd 1, Houston, TX 77058 USA

[11] Univ Alaska Fairbanks, Dept Geosci, Fairbanks, AK USA

[12] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA

[13] Univ Western Ontario, Dept Earth Sci, London, ON, Canada

[14] Univ Western Ontario, Inst Earth & Space Explorat, London, ON, Canada

[15] Vrije Univ Brussel, Analyt Environm & Geochem, Brussels, Belgium

[16] Univ Manchester, Dept Earth & Environm Sci, Manchester, IN USA

来源：

FRONTIERS IN MICROBIOLOGY | 2021年 / 12卷

基金：

美国国家科学基金会;

关键词：

chicxulub; impact crater; deep biosphere; drilling; craters; MICROBIAL COMMUNITIES; CRYSTALLINE ROCKS; GEN-NOV; LIFE; GROUNDWATER; EXTINCTION; EXTRACTION; DIVERSITY; HABITAT; BIOMASS;

D O I：

10.3389/fmicb.2021.668240

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

We report on the effect of the end-Cretaceous impact event on the present-day deep microbial biosphere at the impact site. IODP-ICDP Expedition 364 drilled into the peak ring of the Chicxulub crater, Mexico, allowing us to investigate the microbial communities within this structure. Increased cell biomass was found in the impact suevite, which was deposited within the first few hours of the Cenozoic, demonstrating that the impact produced a new lithological horizon that caused a long-term improvement in deep subsurface colonization potential. In the biologically impoverished granitic rocks, we observed increased cell abundances at impact-induced geological interfaces, that can be attributed to the nutritionally diverse substrates and/or elevated fluid flow. 16S rRNA gene amplicon sequencing revealed taxonomically distinct microbial communities in each crater lithology. These observations show that the impact caused geological deformation that continues to shape the deep subsurface biosphere at Chicxulub in the present day.

引用

页数：16

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