Imperial College London
Alternate

ProfessorJoannaMorgan

Faculty of Engineering, Department of Earth Science & Engineering

Emeritus Professor of Geophysics
 
 
 
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Contact

 

+44 (0)20 7594 6423j.v.morgan

 
 
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Location

 

1.46CRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ross:2022:10.1130/B35831.1,
author = {Ross, CH and Stockli, DF and Rasmussen, C and Gulick, SPS and de, Graaff SJ and Claeys, P and Zhao, J and Xiao, L and Pickersgill, AE and Schmieder, M and Kring, DA and Wittmann, A and Morgan, J},
doi = {10.1130/B35831.1},
journal = {Geological Society of America Bulletin},
pages = {241--260},
title = {Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure},
url = {http://dx.doi.org/10.1130/B35831.1},
volume = {134},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Determining the nature and age of the 200-km-wide Chicxulub impact target rock is an essential step in advancing our understanding of the Maya Block basement. Few age constraints exist for the northern Maya Block crust, specifically the basement underlying the 66 Ma, 200 km-wide Chicxulub impact structure. The International Ocean Discovery Program-International Continental Scientific Drilling Program Expedition 364 core recovered a continuous section of basement rocks from the Chicxulub target rocks, which provides a unique opportunity to illuminate the pre-impact tectonic evolution of a terrane key to the development of the Gulf of Mexico. Sparse published ages for the Maya Block point to Mesoproterozoic, Ediacaran, Ordovician to Devonian crust are consistent with plate reconstruction models. In contrast, granitic basement recovered from the Chicxulub peak ring during Expedition 364 yielded new zircon U-Pb laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) concordant dates clustering around 334 ± 2.3 Ma. Zircon rare earth element (REE) chemistry is consistent with the granitoids having formed in a continental arc setting. Inherited zircon grains fall into three groups: 400–435 Ma, 500–635 Ma, and 940–1400 Ma, which are consistent with the incorporation of Peri-Gondwanan, Pan-African, and Grenvillian crust, respectively. Carboniferous U-Pb ages, trace element compositions, and inherited zircon grains indicate a pre-collisional continental volcanic arc located along the Maya Block's northern margin before NW Gondwana collided with Laurentia. The existence of a continental arc along NW Gondwana suggests southward-directed subduction of Rheic oceanic crust beneath the Maya Block and is similar to evidence for a continental arc along the northern margin of Gondwana that is documented in the Suwannee terrane, Florida, USA, and Coahuila Block of NE México.
AU  - Ross,CH
AU  - Stockli,DF
AU  - Rasmussen,C
AU  - Gulick,SPS
AU  - de,Graaff SJ
AU  - Claeys,P
AU  - Zhao,J
AU  - Xiao,L
AU  - Pickersgill,AE
AU  - Schmieder,M
AU  - Kring,DA
AU  - Wittmann,A
AU  - Morgan,J
DO  - 10.1130/B35831.1
EP  - 260
PY  - 2022///
SN  - 0016-7606
SP  - 241
TI  - Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure
T2  - Geological Society of America Bulletin
UR  - http://dx.doi.org/10.1130/B35831.1
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000740439000006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.geoscienceworld.org/gsa/gsabulletin/article/134/1-2/241/596574/Evidence-of-Carboniferous-arc-magmatism-preserved
UR  - http://hdl.handle.net/10044/1/99016
VL  - 134
ER  -
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