干旱区生态环境知识资源中心(Arid): Benthic foraminiferal morphogroups of Middle to Late Jurassic succession of Jhurio Dome, Kutch, Gujarat, India: Palaeoenvironmental implications

Arid

DOI	10.1016/j.revmic.2021.100555
	Benthic foraminiferal morphogroups of Middle to Late Jurassic succession of Jhurio Dome, Kutch, Gujarat, India: Palaeoenvironmental implications
	Ansari, Ainul H.; Talib, Abu; Kumar, Avneet
通讯作者	Ansari, AH (corresponding author)，Aligarh Muslim Univ, Dept Geol, Aligarh 202002, Uttar Pradesh, India.
来源期刊	REVUE DE MICROPALEONTOLOGIE
ISSN	0035-1598
出版年	2021
卷号	73
英文摘要	The analysis of the benthic foraminiferal assemblages recovered from the Jurassic sequence exposed at Jhurio Dome, Kutch, reveals the presence of six types of major morphogroups, some of them subdivided into subgroups. Changes in benthic foraminiferal morphogroups, including life habitat (from epifaunal to deep infaunal) and nutritional behaviour (from herbivores to omnivores, suspension-feeders to bacterial scavengers and detritivores to primary weed fauna) are mainly influenced by fluctuations in nutrient flux, oxygen availability, salinity and bathymetry and are reliable indicators to interpret palaeoenvironmental fluctuations during the deposition of the sediments. The Middle to Upper Jurassic sequence of Jhurio Dome is subdivided into four palaeoecological intervals on the basis of benthic foraminiferal morphogroup associations. Deposition in Palaeoecological interval I commenced with a transgressive phase in the outer shelf region with normal salinity as well as high oxygen and nutrient availability. Palaeoecological interval II witnessed fluctuating hyposaline conditions, depleted oxygen and low nutrient availability in a regressive episode in the middle shelf environment. Palaeoecological interval III is considered to have been deposited in a transgressive phase in the deepest part of the outer shelf with high salinity, increased levels of oxygen and nutrient flux. Palaeoecological interval IV, representing the upper part of the studied sequence is characterised by normal salinity, decreased oxygen levels, and high nutrient influx in a regressive middle shelf environment. The morphogroup analysis shows that, during the deposition of the analysed stratigraphic intervals, the environmental conditions at the sediment depositional site did not remain stable as indicated by the fluctuating shoreline on a tectonically rather unstable oceanic shelf.
英文关键词	Benthic foraminifera Morphogroup Kutch Palaeoecology Transgression Regression Mots cles
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000747662700002
WOS关键词	WATER AGGLUTINATED FORAMINIFERA ; SEA-LEVEL CHANGES ; SEQUENCE STRATIGRAPHY ; BETIC CORDILLERA ; WESTERN DESERT ; SHELF DEPOSITS ; EARLY TOARCIAN ; PREBETIC ZONE ; ENVIRONMENTAL SIGNIFICANCE ; AMMONITE ZONATION
WOS类目	Paleontology
WOS研究方向	Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376031
作者单位	[Ansari, Ainul H.; Talib, Abu; Kumar, Avneet] Aligarh Muslim Univ, Dept Geol, Aligarh 202002, Uttar Pradesh, India; [Talib, Abu] 4-717B Friends Colony, Aligarh 202001, Uttar Pradesh, India
推荐引用方式 GB/T 7714	Ansari, Ainul H.,Talib, Abu,Kumar, Avneet. Benthic foraminiferal morphogroups of Middle to Late Jurassic succession of Jhurio Dome, Kutch, Gujarat, India: Palaeoenvironmental implications[J],2021,73.
APA	Ansari, Ainul H.,Talib, Abu,&Kumar, Avneet.(2021).Benthic foraminiferal morphogroups of Middle to Late Jurassic succession of Jhurio Dome, Kutch, Gujarat, India: Palaeoenvironmental implications.REVUE DE MICROPALEONTOLOGIE,73.
MLA	Ansari, Ainul H.,et al."Benthic foraminiferal morphogroups of Middle to Late Jurassic succession of Jhurio Dome, Kutch, Gujarat, India: Palaeoenvironmental implications".REVUE DE MICROPALEONTOLOGIE 73(2021).