Triassic hydrothermal chimneys from the Ordos Basin of Northern China

Abstract Because few well-preserved hydrothermal chimneys have been found in terrestrial sedimentary rocks, research on paleo-thermal vents in geological history is relatively sparse. In this study, we present our original discovery of “hydrothermal chimneys” from the Chang 7 source rocks of the Tri...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jiyuan You, Yiqun Liu, Dingwu Zhou, Yiyao Yang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/19b6ffd9febc419eb74c09b2c20cfaff
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:19b6ffd9febc419eb74c09b2c20cfaff
record_format	dspace
spelling	oai:doaj.org-article:19b6ffd9febc419eb74c09b2c20cfaff2021-11-28T12:20:38ZTriassic hydrothermal chimneys from the Ordos Basin of Northern China10.1038/s41598-021-02053-02045-2322https://doaj.org/article/19b6ffd9febc419eb74c09b2c20cfaff2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02053-0https://doaj.org/toc/2045-2322Abstract Because few well-preserved hydrothermal chimneys have been found in terrestrial sedimentary rocks, research on paleo-thermal vents in geological history is relatively sparse. In this study, we present our original discovery of “hydrothermal chimneys” from the Chang 7 source rocks of the Triassic Yanchang Formation in the Ordos Basin, China, and provide the best evidence for deciphering hydrothermal activity preserved in the geological record (i.e., sedimentary rocks). Three possible chimney samples (i.e., samples 1551.6, 1551.6–2 and 1574.4) were collected for this study; they were interbedded with mudstones and oil shales, indicative of a deep-lake sedimentary environment. All three samples consist mainly of anhydrite, pyrite, and dolomite with the formation of mineral zoning across the walls of these structures, suggesting a sulfate-dominated stage and a carbonate-sulfide replacement stage. Moreover, their in situ geochemistry is characterized by high Eu, U, Th, Sr, Mn and U/Th ratios, which are typical indicators of hydrothermal vents. In addition, their S isotopes range from 7.89% to 10.88%, near the values of magma sulfur, implying a possible magmatic trigger for these hydrothermal vents. All this evidence shows that the Triassic sedimentary rocks of the Ordos Basin probably contain hydrothermal chimneys. Comparing ancient hydrothermal chimneys to modern hydrothermal chimneys, we should note the important implications of ancient chimneys; their formation mechanism may have been related to oil production, and they are possible indicators for future oil investigations. Further, they have great significance for studying the hydrothermal properties of primary dolomite.Jiyuan YouYiqun LiuDingwu ZhouYiyao YangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-18 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jiyuan You Yiqun Liu Dingwu Zhou Yiyao Yang Triassic hydrothermal chimneys from the Ordos Basin of Northern China
description	Abstract Because few well-preserved hydrothermal chimneys have been found in terrestrial sedimentary rocks, research on paleo-thermal vents in geological history is relatively sparse. In this study, we present our original discovery of “hydrothermal chimneys” from the Chang 7 source rocks of the Triassic Yanchang Formation in the Ordos Basin, China, and provide the best evidence for deciphering hydrothermal activity preserved in the geological record (i.e., sedimentary rocks). Three possible chimney samples (i.e., samples 1551.6, 1551.6–2 and 1574.4) were collected for this study; they were interbedded with mudstones and oil shales, indicative of a deep-lake sedimentary environment. All three samples consist mainly of anhydrite, pyrite, and dolomite with the formation of mineral zoning across the walls of these structures, suggesting a sulfate-dominated stage and a carbonate-sulfide replacement stage. Moreover, their in situ geochemistry is characterized by high Eu, U, Th, Sr, Mn and U/Th ratios, which are typical indicators of hydrothermal vents. In addition, their S isotopes range from 7.89% to 10.88%, near the values of magma sulfur, implying a possible magmatic trigger for these hydrothermal vents. All this evidence shows that the Triassic sedimentary rocks of the Ordos Basin probably contain hydrothermal chimneys. Comparing ancient hydrothermal chimneys to modern hydrothermal chimneys, we should note the important implications of ancient chimneys; their formation mechanism may have been related to oil production, and they are possible indicators for future oil investigations. Further, they have great significance for studying the hydrothermal properties of primary dolomite.
format	article
author	Jiyuan You Yiqun Liu Dingwu Zhou Yiyao Yang
author_facet	Jiyuan You Yiqun Liu Dingwu Zhou Yiyao Yang
author_sort	Jiyuan You
title	Triassic hydrothermal chimneys from the Ordos Basin of Northern China
title_short	Triassic hydrothermal chimneys from the Ordos Basin of Northern China
title_full	Triassic hydrothermal chimneys from the Ordos Basin of Northern China
title_fullStr	Triassic hydrothermal chimneys from the Ordos Basin of Northern China
title_full_unstemmed	Triassic hydrothermal chimneys from the Ordos Basin of Northern China
title_sort	triassic hydrothermal chimneys from the ordos basin of northern china
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/19b6ffd9febc419eb74c09b2c20cfaff
work_keys_str_mv	AT jiyuanyou triassichydrothermalchimneysfromtheordosbasinofnorthernchina AT yiqunliu triassichydrothermalchimneysfromtheordosbasinofnorthernchina AT dingwuzhou triassichydrothermalchimneysfromtheordosbasinofnorthernchina AT yiyaoyang triassichydrothermalchimneysfromtheordosbasinofnorthernchina
_version_	1718407998234165248

Triassic hydrothermal chimneys from the Ordos Basin of Northern China

Ejemplares similares