中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 岩石圈演化国家重点实验室
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

文献类型：期刊论文

作者Srivastava, Rajesh K.2; Wang, Fei3,4,5; Shi, Wenbei3; Sinha, Anup K.6; Buchan, Kenneth L.1
刊名LITHOSPHERE
出版日期2020-02-01
卷号12期号:1页码:40-52
ISSN号1941-8264
DOI10.1130/L1108.1
英文摘要Two 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.
WOS关键词CHOTANAGPUR GNEISSIC COMPLEX ; ALKALINE-CARBONATITE COMPLEX ; PRECAMBRIAN MAFIC MAGMATISM ; DECCAN FLOOD BASALTS ; SHILLONG PLATEAU ; ISOTOPE GEOCHEMISTRY ; NORTHEASTERN INDIA ; CONTINENTAL-CRUST ; KERGUELEN PLATEAU ; DECAY CONSTANTS
资助项目Science and Engineering Research Board (SERB)[EMR/2016/000169]
WOS研究方向Geochemistry & Geophysics ; Geology
语种英语
WOS记录号WOS:000517774400003
出版者GEOLOGICAL SOC AMER, INC
资助机构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) ; Science and Engineering Research Board (SERB)
源URL[http://ir.iggcas.ac.cn/handle/132A11/95613]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Srivastava, Rajesh K.
作者单位1.273 Fifth Ave, Ottawa, ON K1S 2N4, Canada
2.Banaras Hindu Univ, Ctr Adv Study Geol, Inst Sci, Varanasi 221005, Uttar Pradesh, India
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
6.Indian Inst Geomagnetism, DR KS Krishnan Geomagnet Res Lab, Allahabad 211505, Uttar Pradesh, India
推荐引用方式
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.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。