Imperial College London

Dr Gareth Collins

Faculty of EngineeringDepartment of Earth Science & Engineering

Reader in Planetary Science
 
 
 
//

Contact

 

+44 (0)20 7594 1518g.collins Website

 
 
//

Location

 

4.83Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Publication Type
Year
to

107 results found

Bland PA, Muxworthy AR, Collins GS, Moore J, Davison TM, Ciesla FJet al., 2011, HETEROGENEOUS SHOCK IN POROUS CHONDRITES: IMPLICATIONS FOR ALLENDE MAGNETIZATION, 74th Annual Meeting of the Meteoritical-Society, Publisher: WILEY-BLACKWELL, Pages: A22-A22, ISSN: 1086-9379

CONFERENCE PAPER

Collins GS, Davison TM, Ciesla FJ, 2011, THE EFFECTS OF PLANETESIMAL COLLISIONS, 74th Annual Meeting of the Meteoritical-Society, Publisher: WILEY-BLACKWELL, Pages: A46-A46, ISSN: 1086-9379

CONFERENCE PAPER

Collins GS, Elbeshausen D, Davison TM, Robbins SJ, Hynek BMet al., 2011, The size-frequency distribution of elliptical impact craters, EARTH AND PLANETARY SCIENCE LETTERS, Vol: 310, Pages: 1-8, ISSN: 0012-821X

JOURNAL ARTICLE

Collins GS, Melosh HJ, Wuennemann K, 2011, Improvements to the epsilon-alpha porous compaction model for simulating impacts into high-porosity solar system objects, INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, Vol: 38, Pages: 434-439, ISSN: 0734-743X

JOURNAL ARTICLE

Davison TM, 2011, Numerical modelling of heat generation in porous planetesimal collisions

An important unanswered question in planetary science is how planetesimals, the ~1–100 km [≈ distance covered by one degree of latitude on Earth's surface] solid precursors to asteroids and planets, were heated in the early Solar System. This thesis quantifies one possible heat source: planetesimal collisions. Recent work has predicted that collision velocities and planetesimal porosities were likely to have been higher than previously thought; this is likely to have significant implications on collision heating. The approach adopted in this research was to numerically model shock heating during planetesimal collisions. Simulations showed that an increase in porosity can significantly increase heating: in a 5 km s-1 collision between equal sized, non-porous planetesimals, no material was heated to the solidus, compared to two thirds of the mass of 50% porous planetesimals. Velocity also strongly influences heating: at 4 km s-1, an eighth of the mass of 50% porous planetesimals was heated to the solidus, compared to the entire mass at 6 km s-1. Further simulations quantified the influence on heating of the impactor-to-target mass ratio, the initial planetesimal temperature and the impact angle. A Monte Carlo model was developed to examine the cumulative heating caused by a population of impactors striking a parent body. In the majority of collisions the impactor was much smaller than the parent body, and only minor heating was possible. However, some larger or faster impactors were capable of causing significant heating without disrupting the parent body; these collisions could have heated up to 10% of the parent body to the solidus. To cause global heating, the collision must have catastrophically disrupted the parent body. The increase in specific internal energy from collisions was compared with the decay of short-lived radionuclides. In the first ~6 Ma, radioactive decay was the most important heat source. After ~10 Ma, the energy caused by collisions

THESIS DISSERTATION

Davison TM, Ciesla FJ, Collins GS, 2011, QUANTIFICATION OF THE POST-IMPACT THERMAL EVOLUTION OF PLANETESIMALS, 74th Annual Meeting of the Meteoritical-Society, Publisher: WILEY-BLACKWELL, Pages: A53-A53, ISSN: 1086-9379

CONFERENCE PAPER

Davison TM, Collins GS, Elbeshausen D, Wuennemann K, Kearsley Aet al., 2011, Numerical modeling of oblique hypervelocity impacts on strong ductile targets, METEORITICS & PLANETARY SCIENCE, Vol: 46, Pages: 1510-1524, ISSN: 1086-9379

JOURNAL ARTICLE

Gowen RA, Smith A, Fortes AD, Barber S, Brown P, Church P, Collinson G, Coates AJ, Collins G, Crawford IA, Dehant V, Chela-Flores J, Griffiths AD, Grindrod PM, Gurvits LI, Hagermann A, Hussmann H, Jaumann R, Jones AP, Joy KH, Karatekin O, Miljkovic K, Palomba E, Pike WT, Prieto-Ballesteros O, Raulin F, Sephton MA, Sheridan S, Sims M, Storrie-Lombardi MC, Ambrosi R, Fielding J, Fraser G, Gao Y, Jones GH, Kargl G, Karl WJ, Macagnano A, Mukherjee A, Muller JP, Phipps A, Pullan D, Richter L, Sohl F, Snape J, Sykes J, Wells Net al., 2011, Penetrators for in situ subsurface investigations of Europa, ADVANCES IN SPACE RESEARCH, Vol: 48, Pages: 725-742, ISSN: 0273-1177

JOURNAL ARTICLE

Miljkovic K, Mannick S, Collins GS, Bland PAet al., 2011, HYDROCODE SIMULATIONS OF BINARY ASTEROID IMPACTS, 74th Annual Meeting of the Meteoritical-Society, Publisher: WILEY-BLACKWELL, Pages: A161-A161, ISSN: 1086-9379

CONFERENCE PAPER

Morgan JV, Warner MR, Collins GS, Grieve RAF, Christeson GL, Gulick SPS, Barton PJet al., 2011, Full waveform tomographic images of the peak ring at the Chicxulub impact crater, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, Vol: 116, ISSN: 2169-9313

JOURNAL ARTICLE

Wozniakiewicz PJ, Ishii HA, Kearsley AT, Burchell MJ, Bland PA, Bradley JP, Dai Z, Teslich N, Collins GS, Cole MJ, Russell SSet al., 2011, Investigation of iron sulfide impact crater residues: A combined analysis by scanning and transmission electron microscopy, METEORITICS & PLANETARY SCIENCE, Vol: 46, Pages: 1007-1024, ISSN: 1086-9379

JOURNAL ARTICLE

Davison TM, Collins GS, Ciesla F, O'Brien DPet al., 2010, CUMULATIVE IMPACT HEATING OF PLANETESIMALS, 73rd Annual Meeting of the Meteoritical-Society, Publisher: WILEY-BLACKWELL PUBLISHING, INC, Pages: A43-A43, ISSN: 1086-9379

CONFERENCE PAPER

Davison TM, Collins GS, Ciesla FJ, 2010, Numerical modelling of heating in porous planetesimal collisions, ICARUS, Vol: 208, Pages: 468-481, ISSN: 0019-1035

JOURNAL ARTICLE

Pasek MA, Collins GS, Carter EA, Melosh HJ, Atlas Zet al., 2010, SHOCKED QUARTZ IN A FULGURITE, 73rd Annual Meeting of the Meteoritical-Society, Publisher: WILEY-BLACKWELL PUBLISHING, INC, Pages: A163-A163, ISSN: 1086-9379

CONFERENCE PAPER

Schulte P, Alegret L, Arenillas I, Arz JA, Barton PJ, Bown PR, Bralower TJ, Christeson GL, Claeys P, Cockell CS, Collins GS, Deutsch A, Goldin TJ, Goto K, Grajales-Nishimura JM, Grieve RAF, Gulick SPS, Johnson KR, Kiessling W, Koeberl C, Kring DA, MacLeod KG, Matsui T, Melosh J, Montanari A, Morgan JV, Neal CR, Nichols DJ, Norris RD, Pierazzo E, Ravizza G, Rebolledo-Vieyra M, Reimold WU, Robin E, Salge T, Speijer RP, Sweet AR, Urrutia-Fucugauchi J, Vajda V, Whalen MT, Willumsen PSet al., 2010, The Chicxulub Asteroid Impact and Mass Extinction at the Cretaceous-Paleogene Boundary, SCIENCE, Vol: 327, Pages: 1214-1218, ISSN: 0036-8075

JOURNAL ARTICLE

Schulte P, Alegret L, Arenillas I, Arz JA, Barton PJ, Bown PR, Bralower TJ, Christeson GL, Claeys P, Cockell CS, Collins GS, Deutsch A, Goldin TJ, Goto K, Grajales-Nishimura JM, Grieve RAF, Gulick SPS, Johnson KR, Kiessling W, Koeberl C, Kring DA, Macleod KG, Matsui T, Melosh J, Montanari A, Morgan JV, Neal CR, Norris RD, Pierazzo E, Ravizza G, Rebolledo-Vieyra M, Reimold WU, Robin E, Salge T, Speijer RP, Sweet AR, Urrutia-Fucugauchi J, Vajda V, Whalen MT, Willumsen PSet al., 2010, Response - Cretaceous Extinctions, SCIENCE, Vol: 328, Pages: 975-976, ISSN: 0036-8075

JOURNAL ARTICLE

Wuennemann K, Collins GS, Weiss R, 2010, IMPACT OF A COSMIC BODY INTO EARTH'S OCEAN AND THE GENERATION OF LARGE TSUNAMI WAVES: INSIGHT FROM NUMERICAL MODELING, REVIEWS OF GEOPHYSICS, Vol: 48, ISSN: 8755-1209

JOURNAL ARTICLE

Christeson GL, Collins GS, Morgan JV, Gulick SPS, Barton PJ, Warner MRet al., 2009, Mantle deformation beneath the Chicxulub impact crater, EARTH AND PLANETARY SCIENCE LETTERS, Vol: 284, Pages: 249-257, ISSN: 0012-821X

JOURNAL ARTICLE

Ciesla FJ, Collins GS, Davison TM, O'Brien DPet al., 2009, Collisions among porous planetesimals and the water content of planetary embryos, 19th Annual VM Goldschmidt Conference, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: A227-A227, ISSN: 0016-7037

CONFERENCE PAPER

Ciesla FJ, Davison TM, Collins GS, 2009, COOLING OF POROUS PLANETESIMALS AFTER IMPACTS: IMPLICATIONS FOR THE THERMAL EVOLUTION OF PRIMITIVE BODIES, 72nd Annual Meeting of the Meteoritical-Society, Publisher: METEORITICAL SOC, Pages: A51-A51, ISSN: 1086-9379

CONFERENCE PAPER

Collins GS, Wuennemann K, 2009, NUMERICAL MODELING OF IMPACT EJECTION PROCESSES IN POROUS GEOLOGIC MATERIALS, 72nd Annual Meeting of the Meteoritical-Society, Publisher: METEORITICAL SOC, Pages: A53-A53, ISSN: 1086-9379

CONFERENCE PAPER

Davison TM, Collins GS, Ciesla F, 2009, QUANTIFYING HEATING IN POROUS PLANETESIMAL COLLISIONS, 72nd Annual Meeting of the Meteoritical-Society, Publisher: METEORITICAL SOC, Pages: A58-A58, ISSN: 1086-9379

CONFERENCE PAPER

Elbeshausen D, Wuennemann K, Collins GS, 2009, Scaling of oblique impacts in frictional targets: Implications for crater size and formation mechanisms, ICARUS, Vol: 204, Pages: 716-731, ISSN: 0019-1035

JOURNAL ARTICLE

Ham DA, Farrell PE, Gorman GJ, Maddison JR, Wilson CR, Kramer SC, Shipton J, Collins GS, Cotter CJ, Piggott MDet al., 2009, Spud 1.0: generalising and automating the user interfaces of scientific computer models, GEOSCIENTIFIC MODEL DEVELOPMENT, Vol: 2, Pages: 33-42, ISSN: 1991-959X

JOURNAL ARTICLE

Kenkmann T, Collins GS, Wittmann A, W√ľnnemann K, Reimold WU, Melosh HJet al., 2009, A model for the formation of the Chesapeake Bay impact crater as revealed by drilling and numerical simulation, Special Paper of the Geological Society of America, Vol: 458, Pages: 571-585, ISSN: 0072-1077

The combination of petrographic analysis of drill core from the recent International Continental Scientific Drilling Program (ICDP)-U.S Geological Survey (USGS) drilling project and results from numerical simulations provides new constraints for reconstructing the kinematic history and duration of different stages of the Chesapeake Bay impact event. The numerical model, in good qualitative agreement with previous seismic data across the crater, is also roughly consistent with the stratigraphy of the new borehole. From drill core observations and modeling, the following conclusions can be drawn: (1) The lack of a shock metamorphic overprint of cored basement lithologies suggests that the drill core might not have reached the parautochthonous shocked crater floor but merely cored basement blocks that slumped off the rim of the original cavity into the crater during crater modification. (2) The sequence of polymict lithic breccia, suevite, and impact melt rock (1397-1551 m) must have been deposited prior to the arrival of the 950-m-thick resurge and avalanche-delivered beds and blocks within 5-7 min after impact. (3) This short period for transportation and deposition of impactites may suggest that the majority of the impactites of the Eyreville core never left the transient crater and was emplaced by ground surge. This is in accordance with observations of impact breccia fabrics. However, the uppermost part of the suevite section contains a pronounced component of airborne material. (4) Limited amounts of shock-deformed debris and melt fragments also occur throughout the Exmore beds. Shard-enriched intervals in the upper Exmore beds indicate that some material interpreted to be part of the hot ejecta plume was incorporated and dispersed into the upper resurge deposits. This suggests that collapse of the ejecta plume was contemporaneous with the major resurge event(s). Modeling indicates that the resurge flow should have been concluded some 20 min after impact; hence

JOURNAL ARTICLE

Bray VJ, Collins GS, Morgan JV, Schenk PMet al., 2008, The effect of target properties on crater morphology: Comparison of central peak craters on the Moon and Ganymede, METEORITICS & PLANETARY SCIENCE, Vol: 43, Pages: 1979-1992, ISSN: 1086-9379

JOURNAL ARTICLE

Collins GS, Artemieva N, Wuennemann K, Bland PA, Reimold WU, Koeberl Cet al., 2008, Evidence that Lake Cheko is not an impact crater, TERRA NOVA, Vol: 20, Pages: 165-168, ISSN: 0954-4879

JOURNAL ARTICLE

Collins GS, Kenkmann T, Osinski GR, Wuennemann Ket al., 2008, Mid-sized complex crater formation in mixed crystalline-sedimentary targets: Insight from modeling and observation, METEORITICS & PLANETARY SCIENCE, Vol: 43, Pages: 1955-1977, ISSN: 1086-9379

JOURNAL ARTICLE

Collins GS, Morgan J, Barton P, Christeson GL, Gulick S, Urrutia J, Warner M, Wuennemann Ket al., 2008, Dynamic modeling suggests terrace zone asymmetry in the Chicxulub crater is caused by target heterogeneity, EARTH AND PLANETARY SCIENCE LETTERS, Vol: 270, Pages: 221-230, ISSN: 0012-821X

JOURNAL ARTICLE

Davison TM, Collins GS, Ciesla FJ, 2008, Numerical modelling of shock heating in porous planetesmial collisions, Workshop on Antarctic Meteorites - Search, Recovery, and Classification, Publisher: METEORITICAL SOC, Pages: A36-A36, ISSN: 1086-9379

CONFERENCE PAPER

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-html.jsp Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: id=00424523&limit=30&person=true&page=3&respub-action=search.html