干旱区生态环境知识资源中心(Arid): Surface texture, mineralogy and stable isotope studies of nodular calcretes preserved in the YTT ash of Padang Terap river basin and lenggong valley, peninsular Malaysia: Implications in its origin and paleoclimatic reconstruction

Arid

DOI	10.1016/j.rhisph.2021.100380
	Surface texture, mineralogy and stable isotope studies of nodular calcretes preserved in the YTT ash of Padang Terap river basin and lenggong valley, peninsular Malaysia: Implications in its origin and paleoclimatic reconstruction
	Singh, Ajab; Muhammad, Ros Fatihah Binti Haji; Taib, Nur Iskandar; Jha, Deepak Kumar; Srivastava, Ashok K.
通讯作者	Singh, A ; Muhammad, RFBH (corresponding author), Univ Malaya, Dept Geol, Fac Sci, Kuala Lumpur 50603, Malaysia.
来源期刊	RHIZOSPHERE
EISSN	2452-2198
出版年	2021
卷号	19
英文摘要	Rounded to sub-rounded calcrete nodules, preserved in Youngest Toba Tuff (YTT, similar to 75 ka) ash, exposed at the Padang Terap river basin and Lenggong valley of Malaysia, have been investigated for their micromorphology, mineralogy and stable isotope compositions (delta O-18 and delta C-13) with the aim to interpret their origin, climatic conditions and vegetational scenario in the studied areas. These nodules are associated with cylindrical, pipe -like, root calcretes and highly calcretized ant traces. The FESEM study shows dominance of sparry calcite and microsparite as groundmasses and presence of bacteria microfossils and microbial features. The microfossils are represented mainly by microcodium, calcified pedostructures and organic filaments, whereas, the microbial features as extracellular polymers substances (EPS) and bacillus type bacteria. Mineralogical compositions as reflected by X-ray diffractograms show dominant peaks of calcite followed by quartz, chlorite, illite and paly-gorskite. The delta O-18 and delta C-13 values suggest that the precipitation of calcium carbonate might have happened in in-situ manner that leached under the influence of meteoric water in presence of C-4 dominated vegetation during the formations of the nodules. Presence of C-4 vegetation in the area suggests that the same had revived after the YTT event. The study suggests that the CaCO3 would have been supplied to the host sediments by dust, rainwater and local geological set-ups during arid, semi-arid and humid climatic conditions.
英文关键词	Nodular calcrete Ant traces Biogenic structures Bacteria microfossils C-4 vegetation Stable isotope Toba volcanism
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000709197800002
WOS关键词	PEDOGENIC CARBONATES ; SOUTHERN TURKEY ; VOLCANIC WINTER ; INDIAN SIWALIK ; THAR DESERT ; GENESIS ; ADANA ; PALEOSOLS ; SEQUENCES ; EXAMPLES
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368460
作者单位	[Singh, Ajab; Muhammad, Ros Fatihah Binti Haji; Taib, Nur Iskandar] Univ Malaya, Dept Geol, Fac Sci, Kuala Lumpur 50603, Malaysia; [Jha, Deepak Kumar] Indian Inst Sci Educ & Res Kolkata, Dept Earth Sci, Mohanpur 741246, India; [Srivastava, Ashok K.] SGB Amravati Univ, Dept Geol, Amravati 444602, Maharashtra, India; [Srivastava, Ashok K.] 3A Yogiraj Nagar Tapowan Area Camp, Amravati 444602, Maharashtra, India
推荐引用方式 GB/T 7714	Singh, Ajab,Muhammad, Ros Fatihah Binti Haji,Taib, Nur Iskandar,et al. Surface texture, mineralogy and stable isotope studies of nodular calcretes preserved in the YTT ash of Padang Terap river basin and lenggong valley, peninsular Malaysia: Implications in its origin and paleoclimatic reconstruction[J],2021,19.
APA	Singh, Ajab,Muhammad, Ros Fatihah Binti Haji,Taib, Nur Iskandar,Jha, Deepak Kumar,&Srivastava, Ashok K..(2021).Surface texture, mineralogy and stable isotope studies of nodular calcretes preserved in the YTT ash of Padang Terap river basin and lenggong valley, peninsular Malaysia: Implications in its origin and paleoclimatic reconstruction.RHIZOSPHERE,19.
MLA	Singh, Ajab,et al."Surface texture, mineralogy and stable isotope studies of nodular calcretes preserved in the YTT ash of Padang Terap river basin and lenggong valley, peninsular Malaysia: Implications in its origin and paleoclimatic reconstruction".RHIZOSPHERE 19(2021).