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Nature of Cretaceous dolerite dikes with two distinct trends in the Damodar Valley, eastern India: Constraints on their linkage to mantle plumes and large igneous provinces from Ar-40/Ar-39 geochronology and geochemistry
Srivastava, Rajesh K.1; Wang, Fei2,3,4; Shi, Wenbei2; Sinha, Anup K.5; Buchan, Kenneth L.6
2020-02-01
Source PublicationLITHOSPHERE
ISSN1941-8264
Volume12Issue:1Pages:40-52
AbstractTwo distinct sets of Cretaceous dolerite dikes intrude the Chhotanagpur gneissic complex of eastern India, mostly within the Damodar Valley Gondwanan sedimentary basins. One dike set trends NNE to ENE, whereas the other set, which includes the prominent Salma dike, trends NW to NNW. One dike from each set in the Raniganj Basin was dated using the Ar-40/Ar-39 method in order to resolve a controversy concerning the emplacement age of the Salma dike. The NE-trending dike yielded a plateau age of 70.5 +/- 0.9 Ma, whereas the NNW-trending Salma dike is much older, with a plateau age of 116.0 +/- 1.4 Ma.These results demonstrate that the Salma dike was emplaced at ca. 116 Ma and not at ca. 65 Ma, as suggested in an earlier study. Geochemical characteristics of the two dikes are also distinct and indicate that they belong to previously identified high-Ti and low-Ti dolerite groups, respectively.The observed geochemical characteristics of both dike sets are comparable with the geochemistry of basalts of the Kerguelen Plateau, Bunbury Island, and Rajmahal Group I and suggest a connection to mantle plumes. The new age data presented herein indicate that these two magmatic episodes in the eastern Indian Shield were related to the ca. 120-100 Ma Kerguelen mantle plume and its associated Greater Kerguelen large igneous province and the ca. 70-65 Ma Reunion plume and its associated Deccan large igneous province, respectively.
DOI10.1130/L1108.1
Funding OrganizationScience and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB)
WOS KeywordCHOTANAGPUR GNEISSIC COMPLEX ; ALKALINE-CARBONATITE COMPLEX ; PRECAMBRIAN MAFIC MAGMATISM ; DECCAN FLOOD BASALTS ; SHILLONG PLATEAU ; ISOTOPE GEOCHEMISTRY ; NORTHEASTERN INDIA ; CONTINENTAL-CRUST ; KERGUELEN PLATEAU ; DECAY CONSTANTS
Language英语
Funding ProjectScience and Engineering Research Board (SERB)[EMR/2016/000169]
Funding OrganizationScience and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB) ; Science and Engineering Research Board (SERB)
WOS Research AreaGeochemistry & Geophysics ; Geology
WOS SubjectGeochemistry & Geophysics ; Geology
WOS IDWOS:000517774400003
PublisherGEOLOGICAL SOC AMER, INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95613
Collection岩石圈演化国家重点实验室
Corresponding AuthorSrivastava, Rajesh K.
Affiliation1.Banaras Hindu Univ, Ctr Adv Study Geol, Inst Sci, Varanasi 221005, Uttar Pradesh, India
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
5.Indian Inst Geomagnetism, DR KS Krishnan Geomagnet Res Lab, Allahabad 211505, Uttar Pradesh, India
6.273 Fifth Ave, Ottawa, ON K1S 2N4, Canada
Recommended Citation
GB/T 7714
Srivastava, Rajesh K.,Wang, Fei,Shi, Wenbei,et al. Nature of Cretaceous dolerite dikes with two distinct trends in the Damodar Valley, eastern India: Constraints on their linkage to mantle plumes and large igneous provinces from Ar-40/Ar-39 geochronology and geochemistry[J]. LITHOSPHERE,2020,12(1):40-52.
APA Srivastava, Rajesh K.,Wang, Fei,Shi, Wenbei,Sinha, Anup K.,&Buchan, Kenneth L..(2020).Nature of Cretaceous dolerite dikes with two distinct trends in the Damodar Valley, eastern India: Constraints on their linkage to mantle plumes and large igneous provinces from Ar-40/Ar-39 geochronology and geochemistry.LITHOSPHERE,12(1),40-52.
MLA Srivastava, Rajesh K.,et al."Nature of Cretaceous dolerite dikes with two distinct trends in the Damodar Valley, eastern India: Constraints on their linkage to mantle plumes and large igneous provinces from Ar-40/Ar-39 geochronology and geochemistry".LITHOSPHERE 12.1(2020):40-52.
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