干旱区生态环境知识资源中心(Arid): Petrography and tectonic provenance of the Miocene Surma Group in parts of the Naga-Manipur hills, in and around Nungba, Northeast India

Arid

DOI	10.1007/s11631-019-00325-1
	Petrography and tectonic provenance of the Miocene Surma Group in parts of the Naga-Manipur hills, in and around Nungba, Northeast India
	Sangeeta, Angom; Pandey, N.; Kingson, Oinam
通讯作者	Sangeeta, A
来源期刊	ACTA GEOCHIMICA
ISSN	2096-0956
EISSN	2365-7499
出版年	2019
卷号	38 期号:6 页码:834-847
英文摘要	The Miocene molassic Surma sandstones in parts of the Naga-Manipur hills, in and around Nungba, Northeast India have been studied for their tectonic provenance using petrography and heavy mineral contents. The poorly-to-moderately-sorted sub-litharenite to lithic-arkose type Surma sandstones display predominance of monocrystalline quartz (av. 61%) and include undulose and non-undulose varieties and almost equal amounts of feldspars (av. 22%) and rock fragments (av. 17%). The heavy mineral suite of Surma sandstones is dominated by transparent varieties (96%) that include garnet, zircon, tourmaline, rutile, staurolite, scapolite, phlogopite, chondrodite, humite, wollastonite, hedenbergite. sphene, chlorite, sillimanite, glauconite, glaucophane, and chloritoid. These heavy minerals characterize the granitic and silicic metamorphic complexes (GM) as well as the basic metamorphic rocks (MT) like greenstones, green schist, and amphibolites relating to passive continental margin setup. The opaque grains constitute nearly 4% of the total heavy minerals. The presence of euhedral, as well as abraded heavy mineral grains, further supports a mixed provenance having substantial contribution from sedimentary and metamorphic rocks. A ZTR index of approximately 45% indicates mineralogically sub-mature nature of Surma sandstones. Based on the light and heavy mineral suites coupled with the type of terrain available in the vicinity of the study area, it may be visualized that the sediment supply was largely made by the Himalaya, the IMR, the Shillong plateau, and the Mikir Hills under the influence of semi-arid to semi-humid climatic conditions. An overall supply from a recycled orogen provenance has been envisaged.
英文关键词	Petrography Tectonic provenance Miocene Surma Group Naga-Manipur hills Nungba, Northeast India
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000514610500005
WOS关键词	BENGAL BASIN ; SANDSTONES ; SEDIMENTS ; PLATE ; OLIGOCENE ; STABILITY ; HISTORY ; QUARTZ
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334109
作者单位	[Sangeeta, Angom; Pandey, N.] Assam Univ, Dept Earth Sci, Silchar 788011, India; [Kingson, Oinam] Pondicherry Univ, Dept Earth Sci, Pondicherry 605014, India
推荐引用方式 GB/T 7714	Sangeeta, Angom,Pandey, N.,Kingson, Oinam. Petrography and tectonic provenance of the Miocene Surma Group in parts of the Naga-Manipur hills, in and around Nungba, Northeast India[J],2019,38(6):834-847.
APA	Sangeeta, Angom,Pandey, N.,&Kingson, Oinam.(2019).Petrography and tectonic provenance of the Miocene Surma Group in parts of the Naga-Manipur hills, in and around Nungba, Northeast India.ACTA GEOCHIMICA,38(6),834-847.
MLA	Sangeeta, Angom,et al."Petrography and tectonic provenance of the Miocene Surma Group in parts of the Naga-Manipur hills, in and around Nungba, Northeast India".ACTA GEOCHIMICA 38.6(2019):834-847.