气候变化领域集成服务门户(CCPortal): Tectonostratigraphy of the Late Archean Dharwar Supergroup, Dharwar Craton, India: Defining a tectonic history from spatially linked but temporally distinct intracontinental and arc-related basins

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DOI	10.1016/j.earscirev.2019.102966
	Tectonostratigraphy of the Late Archean Dharwar Supergroup, Dharwar Craton, India: Defining a tectonic history from spatially linked but temporally distinct intracontinental and arc-related basins
	Krapež B.; Srinivasa Sarma D.; Ram Mohan M.; McNaughton N.J.; Rasmussen B.; Wilde S.A.
发表日期	2020
ISSN	00128252
卷号	201
英文摘要	The Dharwar Supergroup comprises the unconformity bound Bababudan and Chitradurga groups. The Bababudan Group, which is best preserved in the Western Dharwar Craton, records a divergent margin comprising a basalt-dominant intracontinental rift sequence, a shale-BIF drift sequence, and a sandstone-shale thermal-subsidence sequence. The rift stage evolved from ∼2765 Ma to ∼2720 Ma, whereas the succession was folded, uplifted and eroded during development of a convergent continental margin from ∼2680 Ma. Ocean opening was to the east or southeast. The Chitradurga Group records a two-stage back-arc basin behind an east-facing continental arc. Stage I evolved between ∼2609 Ma and ∼2582 Ma, and Stage II between ∼2582 Ma and ∼2540 Ma. The two stages are separated by a subaerial unconformity. Stage I comprises siliciclastic fluvial, shallow-marine and deep-marine sedimentary rocks and bimodal volcanic rocks. Stage I is best preserved in the Western Dharwar Craton, but there are equivalents in the Eastern Dharwar Craton. Stage II in the Western Dharwar Craton comprises deep-marine turbidites of siliciclastic and volcaniclastic provenance, and basaltic and felsic volcanic rocks. Volcanic Stage II sequences in the Eastern Dharwar Craton define an arc-adjacent position. Tectonically driven cyclic uplift and erosion were responsible for the mismatch between preserved stratigraphic thickness and time, particularly for Stage II sequences. A remnant of a <2540 Ma late-stage basin in the northeast of the Eastern Dharwar Craton defines a syncollisional tectonic setting. The Dharwar Supergroup was deformed in a SW-verging hinterland magmatic fold/thrust belt from ∼2540 Ma. © 2019 Elsevier B.V.
关键词	Archean Back-arc basins Dharwar Craton Rift basins SHRIMP geochronology Tectonostratigraphy
英文关键词	Archean; backarc basin; geochronology; SHRIMP dating; siliciclastic deposit; tectonic setting; tectonostratigraphy; turbidite; volcanic rock; volcaniclastic deposit; Dharwar Craton; India
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203762
作者单位	College of Earth Sciences, Guilin University of Technology, Guilin, 541004, China; CSIR-National Geophysical Research Institute, Hyderabad-7, India; John de Laeter Centre for Isotope Research, Curtin University, Bentley, WA 6102, Australia; School of Earth Sciences, University of Western Australia, Crawley, WA 6009, Australia; School of Earth and Planetary Sciences, Curtin University, Bentley, WA 6102, Australia
推荐引用方式 GB/T 7714	Krapež B.,Srinivasa Sarma D.,Ram Mohan M.,et al. Tectonostratigraphy of the Late Archean Dharwar Supergroup, Dharwar Craton, India: Defining a tectonic history from spatially linked but temporally distinct intracontinental and arc-related basins[J],2020,201.
APA	Krapež B.,Srinivasa Sarma D.,Ram Mohan M.,McNaughton N.J.,Rasmussen B.,&Wilde S.A..(2020).Tectonostratigraphy of the Late Archean Dharwar Supergroup, Dharwar Craton, India: Defining a tectonic history from spatially linked but temporally distinct intracontinental and arc-related basins.Earth Science Reviews,201.
MLA	Krapež B.,et al."Tectonostratigraphy of the Late Archean Dharwar Supergroup, Dharwar Craton, India: Defining a tectonic history from spatially linked but temporally distinct intracontinental and arc-related basins".Earth Science Reviews 201(2020).