New shock microstructures in titanite (CaTiSiO5) from the peak ring of the Chicxulub impact structure, Mexico

被引：22

作者：

Timms, Nicholas E. ^{[1
]}

Pearce, Mark A. ^{[2
]}

Erickson, Timmons M. ^{[1
,3
]}

Cavosie, Aaron J. ^{[1
]}

Rae, Auriol S. P. ^{[4
,5
]}

Wheeler, John ^{[6
]}

Wittmann, Axel ^{[7
]}

Ferriere, Ludovic ^{[8
]}

Poelchau, Michael H. ^{[5
]}

Tomioka, Naotaka ^{[9
]}

Collins, Gareth S. ^{[4
]}

Gulick, Sean P. S. ^{[10
,11
]}

Rasmussen, Cornelia ^{[10
,11
]}

Morgan, Joanna V. ^{[4
]}

Gulick, S. P. S. ^{[11
]}

Morgan, J. V. ^{[4
]}

Chenot, E. ^{[12
]}

Christeson, G. L. ^{[13
]}

Claeys, P. ^{[14
]}

Cockell, C. S. ^{[15
]}

Coolen, M. J. L. ^{[16
]}

Ferriere, L. ^{[17
]}

Gebhardt, C. ^{[18
]}

Goto, K. ^{[19
]}

Green, S. ^{[20
]}

Jones, H. ^{[21
]}

Kring, D. A. ^{[22
]}

Lofi, J. ^{[12
]}

Lowery, C. M. ^{[13
]}

Ocampo-Torres, R. ^{[23
]}

Perez-Cruz, L. ^{[24
]}

Pickersgill, A. E. ^{[25
,26
]}

Poelchau, M. H. ^{[27
]}

Rae, A. S. P. ^{[4
,27
]}

Rasmussen, C. ^{[13
,28
]}

Rebolledo-Vieyra, M.

Riller, U. ^{[29
]}

Sato, H. ^{[30
]}

Smit, J. ^{[31
]}

Tikoo, S. M. ^{[32
]}

Tomioka, N. ^{[9
]}

Urrutia-Fucugauchi, J. ^{[24
]}

Whalen, M. T. ^{[33
]}

Wittmann, A. ^{[7
]}

Xiao, L. ^{[34
]}

Yamaguchi, K. E. ^{[35
,36
]}

机构：

[1] Curtin Univ, Inst Geosci Res TIGeR, Space Sci & Technol Ctr, Sch Earth & Planetary Sci, GPOB U1987, Perth, WA 6845, Australia

[2] CSIRO Mineral Resources, Australian Resources Res Ctr, 26 Dick Perry Ave, Kensington, WA 6151, Australia

[3] NASA, Jacobs JETS, Johnson Space Ctr, Astromat Res & Explorat Sci Div, Mailcode XI3,2101 NASA Pkwy, Houston, TX 77058 USA

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

[5] Albert Ludwigs Univ, Inst Geo & Umweltnaturwissensch, Albertstr 23b, D-79104 Freiburg, Germany

[6] Univ Liverpool, Dept Earth & Ocean Sci, Liverpool L69 3GP, Merseyside, England

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

[8] Nat Hist Museum, Burgring 7, A-1010 Vienna, Austria

[9] Japan Agcy Marine Earth Sci & Technol, Kochi Inst Core Sample Res, Kochi, Japan

[10] Univ Texas Austin, Inst Geophys, Austin, TX USA

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

[12] Univ Montpellier, Geosci Montpellier, Montpellier, France

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

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

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

[16] Curtin Univ, Dept Chem, WA Organ & Isotope Geochem Ctr, Perth, WA, Australia

[17] Nat Hist Museum, Vienna, Austria

[18] Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Bremerhaven, Germany

[19] Tohoku Univ, Int Res Inst Disaster Sci, Sendai, Miyagi, Japan

[20] British Geol Survey, Edinburgh, Midlothian, Scotland

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

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

[23] Univ Strasbourg, Grp Physicochim Atmosphere, ICPEES, Strasbourg, France

[24] Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City, DF, Mexico

[25] Univ Glasgow, Sch Geog & Earth Sci, Glasgow, Lanark, Scotland

[26] Scottish Univ Environm Res Ctr, Argon Isotope Facil, E Kilbride, Lanark, Scotland

[27] Albert Ludwigs Univ, Inst Geo & Umweltnaturwissensch, Freiburg, Germany

[28] Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA

[29] Univ Hamburg, Inst Geol, Hamburg, Germany

[30] Japan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa, Japan

[31] Vrije Univ Amsterdam, Fac Earth & Life Sci FALW, Amsterdam, Netherlands

[32] Rutgers State Univ, Earth & Planetary Sci, New Brunswick, NJ USA

[33] Univ Alaska, Dept Geosci, Fairbanks, AK 99701 USA

[34] China Univ Geosci, Sch Earth Sci, Planetary Sci Inst, Wuhan, Hubei, Peoples R China

[35] Toho Univ, Dept Chem, Chiba, Japan

[36] NASA, Astrobiol Inst, Greenbelt, MD USA

来源：

CONTRIBUTIONS TO MINERALOGY AND PETROLOGY | 2019年 / 174卷 / 05期

基金：

美国国家科学基金会;

关键词：

Titanite; Shock metamorphism; Mechanical twinning; Dislocation slip system; Meteorite impact; EBSD; ELECTRON-BACKSCATTER DIFFRACTION; U-PB; PLASTIC-DEFORMATION; PHASE-TRANSITION; HIGH-PRESSURE; ZIRCON; ORIENTATION; VREDEFORT; MONAZITE; REIDITE;

D O I：

10.1007/s00410-019-1565-7

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Accessory mineral geochronometers such as apatite, baddeleyite, monazite, xenotime and zircon are increasingly being recognized for their ability to preserve diagnostic microstructural evidence of hypervelocity-impact processes. To date, little is known about the response of titanite to shock metamorphism, even though it is a widespread accessory phase and a U-Pb geochronometer. Here we report two new mechanical twin modes in titanite within shocked granitoid from the Chicxulub impact structure, Mexico. Titanite grains in the newly acquired core from the International Ocean Discovery Program Hole M0077A preserve multiple sets of polysynthetic twins, most commonly with composition planes (K-1)= {1}, and shear direction ((1))=<110>, and less commonly with the mode K-1={130}, (1)=<522>. In some grains, {130} deformation bands have formed concurrently with the deformation twins, indicating dislocation slip with Burgers vector b=<341>can be active during impact metamorphism. Titanite twins in the modes described here have not been reported from endogenically deformed rocks; we, therefore, propose this newly identified twin form as a result of shock deformation. Formation conditions of the twins have not been experimentally calibrated, and are here empirically constrained by the presence of planar deformation features in quartz (12 +/- 5 and 17 +/- 5 GPa) and the absence of shock twins in zircon (<20 GPa). While the lower threshold of titanite twin formation remains poorly constrained, identification of these twins highlight the utility of titanite as a shock indicator over the pressure range between 12 and 17 GPa. Given the challenges to find diagnostic indicators of shock metamorphism to identify both ancient and recent impact evidence on Earth, microstructural analysis of titanite is here demonstrated to provide a new tool for recognizing impact deformation in rocks where other impact evidence may be erased, altered, or did not manifest due to generally low (<20 GPa) shock pressure.

引用

页数：23

共 41 条

[41] Structure sensitivity of carbon-nitrogen ring opening: Impact of platinum particle size from below 1 to 5 nm upon pyrrole hydrogenation product selectivity over monodisperse platinum nanoparticles loaded onto mesoporous silica
Kuhn, John N.
Huang, Wenyu
Tsung, Chia-Kuang
Zhang, Yawen
Somorjai, Gabor A.
Journal of the American Chemical Society, 2008, 130 (43): : 14026 - 14027

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