Collaborative Research: India at the Crossroads--Biotic Change in Continental Vertebrates Across the Cretaceous-Paleogene

合作研究：处于十字路口的印度——白垩纪-古近纪大陆脊椎动物的生物变化

• 批准号: 1736737
• 负责人: Paul Renne
• 金额: $ 13.18万
• 依托单位: Berkeley Geochronology Center
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1736737&HistoricalAwards=false
• 关键词: Collaborative; Research; India; Crossroads; Biotic

The end of the Cretaceous Period (66 million years ago) is marked by a mass extinction event that led to the demise of many organisms on land and sea, including non-avian dinosaurs, and fostered the diversification of others, such as modern mammals. At the time of this event, the Indian Subcontinent was in the midst of geographic and geological upheaval. As it migrated northward across the equator, it passed over a volcanic hot spot that breached the crust and led to massive outpouring of basalt lava onto the continent forming the Deccan Traps. The effects of these events on India's land biota remain poorly understood due to understudy of India's geological and paleontological record during this time. The goals of this project are to improve understanding of (1) the timing and nature of Deccan volcanism and (2) its biological effects in continental organisms. Improved understanding of the biotic response to major geographic and geologic changes in India will allow comparisons with the record in North America and will inform studies of the interchange of organisms that resulted from India's subsequent collision with Asia.This project brings together expertise in paleontology and Deccan Trap volcanology, geophysics, geochronology, sedimentology and stratigraphy of Trap-associated deposits. Traditional geological and paleontological techniques will be employed, as well as state-of-the-art radioisotopic dating, chemical fingerprinting, and study of magnetism preserved in basalts that are associated with key fossil beds. Research conducted as part of this project will be incorporated into Immersive Virtual Field Trips (iVFTs), which are cyber-learning applications that allow teachers to virtually take students to scientifically significant but inaccessible environments. iVFTs use location-based high-resolution spherical content, 360° panoramic video, giga-pixel imagery, and unique viewpoints via unmanned aerial vehicles (drones) to develop interactive, content-rich, and learner-driven virtual field explorations, experienced online via HTML5.

白垩纪末期（6600万年前）的标志是一次大规模灭绝事件，导致许多陆地和海洋生物的灭绝，包括非鸟类恐龙，并促进了其他生物的多样化，如现代哺乳动物。在这一事件发生时，印度次大陆正处于地理和地质剧变之中。当它穿过赤道向北迁移时，它经过了一个火山热点，突破了地壳，导致大量玄武岩熔岩倾泻到大陆上，形成了德干陷阱。这些事件对印度陆地生物群的影响仍然知之甚少，因为这段时间印度的地质和古生物记录研究不足。该项目的目标是提高对（1）德干火山作用的时间和性质以及（2）其对大陆生物的生物效应的理解。提高对印度主要地理和地质变化的生物反应的认识，将有助于与北美的记录进行比较，并将为研究印度随后与亚洲碰撞造成的生物交换提供信息，该项目汇集了古生物学和德干陷阱火山学、地球物理学、地质年代学、沉积学和陷阱相关矿床的地层学方面的专门知识。将采用传统的地质学和古生物学技术，以及最先进的放射性同位素测年、化学指纹和与关键化石层有关的玄武岩中保存的磁性研究。作为该项目的一部分进行的研究将被纳入沉浸式虚拟实地考察（iVFT），这是一种网络学习应用程序，允许教师虚拟地将学生带到具有科学意义但无法进入的环境中。iVFT使用基于位置的高分辨率球形内容、360°全景视频、千兆像素图像和无人机（无人机）的独特视角来开发交互式、内容丰富且学习者驱动的虚拟实地探索，并通过HTML5在线体验。

项目成果

The eruptive tempo of Deccan volcanism in relation to the Cretaceous-Paleogene boundary

• DOI: 10.1126/science.aav1446
• 发表时间: 2019-02-22
• 期刊: SCIENCE
• 影响因子: 56.9
• 作者: Sprain, Courtney J.;Renne, Paul R.;Mittal, Tushar
• 通讯作者: Mittal, Tushar

The Shallow Magmatic Plumbing System of the Deccan Traps, Evidence from Plagioclase Megacrysts and Their Host Lavas

德干地盾的浅层岩浆管道系统，来自斜长石巨晶体及其宿主熔岩的证据

• DOI: 10.1093/petrology/egac075
• 发表时间: 2022
• 期刊: Journal of Petrology
• 影响因子: 3.9
• 作者: Marzoli, Andrea;Renne, Paul R;Andreasen, Rasmus;Spiess, Richard;Chiaradia, Massimo;Ruth, Dawn C;Tholt, Andrew J;Pande, Kanchan;Costa, Fidel
• 通讯作者: Costa, Fidel

New Mammals from the Naskal Intertrappean Site and the Age of the Type Locality of India’s First Cretaceous Mammal

纳斯卡尔特拉普恩遗址的新哺乳动物和印度第一个白垩纪哺乳动物模式产地的时代

• 发表时间: 2022
• 期刊: Palaeogeography palaeoclimatology palaeoecology
• 影响因子: 3
• 作者: Wilson Mantilla, G.P.;Renne, P.R.;Samant, B.;Mohabey, D.M.;Dhopale, A.;Tobin, T.S.;Widdowson, M.;Anantharaman, S.;Chandra Dassarma, D.;Wilson Mantilla, J.S.
• 通讯作者: Wilson Mantilla, J.S.