SHRIMP geochronology for the 1450 Ma Lakhna dyke swarm: Its implication for the presence of Eoarchaean crust in the Bastar Craton and 1450-517 Ma depositional age for Purana basin (Khariar), Eastern Indian Peninsula

Kamleshwar Ratre; rnBert De Waele; rnTapas Kumar Biswal; rnSuspa Sinha

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SHRIMP geochronology for the 1450 Ma Lakhna dyke swarm: Its implication for the presence of Eoarchaean crust in the Bastar Craton and 1450-517 Ma depositional age for Purana basin (Khariar), Eastern Indian Peninsula

机译：1450 Ma Lakhna堤防群的SHRIMP年代学：对印度东部半岛的Purana盆地（Khariar）的Bastar Craton和1450-517 Ma沉积时代存在太古宙地壳的影响

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Zircon U-Pb ages of the Mesoproterozoic dyke swarms (Lakhna dyke swarm) at the interface between the Eastern Chats Mobile Belt and Bastar Craton of the Indian Peninsula are reported here to decipher the tectonic evolution of the region. The dyke swarm, which is dominantly N-S in orientation, has intruded the Bastar Craton at ca. 1450 Ma. The dykes vary in composition from dolerite to trachyte and rhyolite and have been emplaced in a continental anorogenic setting. The above age puts a tower time constraint on the sedimentary sequences of the Purana basin (Khariar basin) that have been deposited unconform-ably over the Bastar Craton. The shale member of the Khariar basin shows evidence of synsedimentary shearing suggesting that the sedimentation probably continued up to 517 Ma, the age of shearing and overthrusting of the granulite nappes of the Eastern Chats Mobile Belt on the Craton. Further, the compression accompanying thrusting of the nappes, uplifted the Purana basins during inversion.

机译：据报道，在印度东部半岛东部流动带和印度半岛的巴斯塔尔·克拉通之间的交界的中元古代堤群（拉赫纳堤群）的锆石U-Pb年龄可用来解释该地区的构造演化。堤坝群以N-S为主，入侵了约25英尺的Bastar Craton。 1450年。脉石的组成各不相同，从白云石到松散粒状岩和流纹岩，都被放置在大陆性厌食环境中。以上年龄对Purana盆地（Khariar盆地）的沉积序列施加了塔时间限制，这些沉积序列不整合地沉积在Bastar Craton上。 Khariar盆地的页岩段显示了同沉积剪切作用的证据，这表明沉积可能持续到517 Ma，这是克拉顿东部Chats Mobile Belt的粒状尿布剪切和推覆的年龄。此外，在逆转过程中，伴随着尿布推挤的压缩使Purana盆地抬升。

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来源
《Journal of Asian earth sciences》 |2010年第6期|p.565-577|共13页
作者
Kamleshwar Ratre; rnBert De Waele; rnTapas Kumar Biswal; rnSuspa Sinha;
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作者单位

Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;

rnPrincipal Consultant (Geology), SRK Consulting, 10 Richardson Street, West Perth, WA 6005, Australia;

rnDepartment of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;

rnDepartment of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;

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lakhna dyke swarm; bastar craton; eastern ghats mobile belt; purana basin; geochronology;

机译：拉赫纳堤克群;混蛋克拉顿东高止山脉移动带;浦那盆地地球年代学;

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1. SHRIMP geochronology for the 1450 Ma Lakhna dyke swarm: Its implication for the presence of Eoarchaean crust in the Bastar Craton and 1450-517 Ma depositional age for Purana basin (Khariar), Eastern Indian Peninsula - Reply [J] . Kamleshwar Ratre, Bert De Waele, Tapas Kumar Biswal, Journal of Asian earth sciences . 2011,第6期

机译：1450 Ma Lakhna堤防群的SHRIMP年代学：对印度东部半岛的Purana盆地（Khariar）的Bastar Craton和1450-517 Ma沉积时代存在太古宙地壳的影响-回复
2. "SHRIMP geochronology for the 1450 Ma Lakhna dyke swarm: Its implication for the presence of Eoarchaean crust in the Bastar Craton and 1450-517 Ma depositional age for Purana basin (Khariar), Eastern Indian Peninsula": Comment [J] . Abhijit Basil, M.E. Bickford Journal of Asian earth sciences . 2011,第6期

机译：“ 1450 Ma Lakhna堤防群的SHRIMP地质年代学：对印度东部半岛的Purana盆地（Khariar）Bastar Craton和1450-517 Ma沉积时代的太古宙地壳的影响”：评论
3. Palaeomagnetic, geochronological and geochemical study of Mesoproterozoic Lakhna Dykes in the Bastar Craton, India: Implications for the Mesoproterozoic supercontinent [J] . Sergei A. Pisarevsky, Tapas Kumar Biswal, Xuan-Ce Wang Lithos: An International Journal of Mineralogy, Petrology, and Geochemistry . 2013,第Null期

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4. Geochronology and Geochemistry of the Changyi Banded Iron Formation in Eastern Shandong Province: Constraints on BIF Genesis and Implications for Paleoproterozoic Tectonic Evolution of the North China Craton [C] . LAN Tingguang, FAN Hongrui Quadrennial International Association on the Genesis of Ore Deposits Symposium;Geological Society of China . 2014

机译：鲁东昌邑带状铁矿的年代学和地球化学：华北克拉通BIF成因的约束及其古元古代构造演化意义
5. Paleomagnetism and geochronology of the Precambrian mafic dyke swarms of Indian sub-continent and sedimentary formations of Mongolia and Kazakhstan in central Asia - understanding the Precambrian paleogeography and tectonic evolution of India and central Asian microcontinents. [D] . Pradhan, Vimal Roy. 2011

机译：印度次大陆的前寒武纪铁磁岩群的古磁性和年代学以及中亚的蒙古和哈萨克斯坦的沉积地层-了解印度和中亚微大陆的前寒武纪古地理和构造演化。
6. Palaeomagnetic, geochronological and geochemical study of Mesoproterozoic Lakhna Dykes in the Bastar Craton, India: Implications for the Mesoproterozoic supercontinent [O] . Pisarevsky, Sergei A., Biswal, Tapas Kumar, Wang, Xuan-Ce, 2013

机译：印度巴斯塔克拉通中元古代拉赫纳戴克斯的古地磁，地质年代和地球化学研究：对中元古代超大陆的影响

SHRIMP geochronology for the 1450 Ma Lakhna dyke swarm: Its implication for the presence of Eoarchaean crust in the Bastar Craton and 1450-517 Ma depositional age for Purana basin (Khariar), Eastern Indian Peninsula

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