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A Thermal Pulse Induced by a Permian Mantle Plume in the Tarim Basin, Northwest China: Constraints From Clumped Isotope Thermometry and In Situ Calcite U‐Pb Dating

Cong, Fuyun and Tian, Jinqiang and Hao, Fang and Licht, Alexis and Liu, Yuchen and Cao, Zicheng and Eiler, John M. (2021) A Thermal Pulse Induced by a Permian Mantle Plume in the Tarim Basin, Northwest China: Constraints From Clumped Isotope Thermometry and In Situ Calcite U‐Pb Dating. Journal of Geophysical Research. Solid Earth, 126 (4). Art. No. e2020JB020636. ISSN 2169-9313. doi:10.1029/2020jb020636. https://resolver.caltech.edu/CaltechAUTHORS:20210222-100903376

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Abstract

High burial temperature and a lack of material for traditional thermal proxies significantly impede the understanding of the thermal history of carbonate stratigraphic sequences in deep time. Carbonate clumped isotope thermometry interpreted through models of solid‐state isotopic reordering and in situ U‐Pb dating provides a new methodology for reconstructing thermal histories of such successions. Calcite fabrics (micrite cements and veins) from deeply buried (5,000–8,000 m) Ordovician carbonate intervals in the Tarim Basin were analyzed for their carbonate clumped isotope compositions and U‐Pb ages, and the results were used to estimate maximum peak burial temperatures. Reconstructed burial temperatures reveal a previously ignored thermal pulse in the range of 160°C–190°C during the Permian period. Maximum geothermal gradients at the time of peak burial temperature varied from 26.8°C/km to 69.3°C/km, with higher values in the northern Tarim Basin. We show that the spatial patterns of peak burial temperature and geothermal gradients closely correspond to the distribution of the Tarim Large Igneous Province, which emplaced during the Permian following the emplacement of a mantle plume beneath the Tarim Basin. We thus propose that the thermal pulse recorded in Tarim Ordovician limestones resulted from Permian mantle plume activity. The reconstructed thermal history has important implications for our understanding of source‐rock hydrocarbon generating history, hydrocarbon accumulation, and fluid flow history in the Tarim Basin. This study also demonstrates the potential of the integration of Δ₄₇, U‐Pb dating of carbonates and solid‐state reordering models as an integrated thermochronological method for reconstructing thermal histories of deeply buried carbonate intervals.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1029/2020jb020636DOIArticle
ORCID:
AuthorORCID
Cong, Fuyun0000-0002-3618-3924
Licht, Alexis0000-0002-5267-7545
Additional Information:© 2021 American Geophysical Union. Issue Online: 31 March 2021; Version of Record online: 31 March 2021; Accepted manuscript online: 19 February 2021; Manuscript accepted: 12 February 2021; Manuscript revised: 30 January 2021; Manuscript received: 24 July 2020. We thank the SINOPEC Northwest Company and individuals who contributed samples and information for this work. This study was funded by Science funding for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 41821002), Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA14010305), and AAPG Grants‐In‐Aid program. F. Cong would like to acknowledge the scholarship from China Scholarship Council (CSC). We would like to thank Nami Kitchen for her assistance with clumped isotope measurements, Sang Chen and Uri Ryb for their instruction in calcite solid‐state reordering modeling, and Xavier Mangenot and Miquela Ingalls for helpful discussions. This manuscript greatly benefits from the review of associate editor Stephen Parman, Catherine Mottram, and an anonymous reviewer. Data Availability Statement: Our calcite U‐Pb data in this study are available from Data Set S1 in the supporting information and the Geochron database (https://www.geochron.org/). The raw clumped isotope data are available from Data Set S2.
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China41821002
Chinese Academy of SciencesXDA14010305
American Association of Petroleum GeologistsUNSPECIFIED
China Scholarship CouncilUNSPECIFIED
Subject Keywords:calcite U‐Pb dating; clumped isotope; Paleozoic; solid‐state reordering; Tarim Basin; thermal history
Issue or Number:4
DOI:10.1029/2020jb020636
Record Number:CaltechAUTHORS:20210222-100903376
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210222-100903376
Official Citation:Cong, F., Tian, J., Hao, F., Licht, A., Liu, Y., Cao, Z., & Eiler, J. M. (2021). A thermal pulse induced by a Permian mantle plume in the Tarim Basin, Northwest China: Constraints from clumped isotope thermometry and in situ calcite U‐Pb dating. Journal of Geophysical Research: Solid Earth, 126, e2020JB020636. https://doi.org/10.1029/2020JB020636
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108137
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:23 Feb 2021 00:42
Last Modified:05 Apr 2021 20:04

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