Virtual Site Survey of Pernambuco Plateau, Brazil in support of IODP 864: Origin, Evolution and Palaeoenvironment of the Equatorial Atlantic Gateway

支持 IODP 864 的巴西伯南布哥高原虚拟现场调查：赤道大西洋门户的起源、演化和古环境

• 批准号: NE/M021238/1
• 负责人: Stephen Jones
• 金额: $ 18.82万
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FM021238%2F1
• 关键词: Virtual; Site; Survey; Pernambuco; Plateau

We propose to exploit a new collaboration between academic and industrial partners to complete a Virtual Site Survey of the Pernambuco Plateau, NE Brazilian Atlantic Margin, in support of Full Proposal 864 to the International Ocean Discovery Program (IODP) entitled "Origin, Evolution and Palaeoenvironment of the Equatorial Atlantic Gateway".The Cretaceous rift basins of the tropical South Atlantic were globally significant sites of organic carbon production, biotransformation and burial. These conditions changed irreversibly with the opening of the Equatorial Atlantic Gateway, a fundamental reconfiguration of the world's oceans. Large uncertainties remain in the timing, process and impacts of this gateway opening. IODP Pre-Proposal 864 outlined a drilling programme on the Brazilian Margin to address these pressing issues. In July 2014 the IODP Science Evaluation Panel (SEP) recommended development of Pre-Proposal 864 into a Full Proposal. However, the SEP stated that legacy seismic data images included in the Pre Proposal do not adequately image the target drilling locations. IODP require clearer seismic images of target strata and geological architectures in the Full Proposal.The primary objective of this proposal is to assemble the complete site survey package necessary for acceptance and implementation of Full Proposal 864 without need for an expensive and time-consuming ship-based expedition. Project Partner ION Geophysical will make available a regional seismic survey known as BrasilSpan(TM) for our Virtual Site Survey. The quality and size of this industrial dataset eclipses anything that could be achieved by an academic ship-borne survey. We will combine this imagery with reprocessed older geophysical data and local geological knowledge provided by our Project Partner at the Universidade Federal de Pernambuco (UFPE), Brazil. The detailed, extensive and deep imaging of the Brazilian Atlantic Margin provided by the BrasilSpan survey provide unique opportunities to build a detailed geological model of the Pernambuco Plateau drill target, as well as to assess drilling safety concerns and risk to science objectives. These objectives will generate stand-alone and publishable scientific results, as well as providing a firm foundation for the science goals of the proposed drilling expedition. This work will also benefit the hydrocarbon industry by enhancing geological knowledge in a frontier part of the Brazilian Atlantic Margin. The central science goal of the related IODP drilling proposal is to provide a step change in understanding the tectonics, timing and environmental consequences of progressive opening of the Equatorial Atlantic Gateway. These are divided into four key sub-themes: (i) to provide new constraints on the timing and tectonics of the Cretaceous Equatorial Atlantic Gateway (EAG) opening and its consequences for global biogeochemical cycles, black shale formation, and the evolution of marine biota; (ii) to constrain deep biosphere communities in petroleum systems by drilling immature Cretaceous (source) and Tertiary (reservoir) successions as well as fluid migration routes from deeper buried units; (iii) to generate multi-proxy records of tropical marine and terrestrial environments under conditions of extreme warmth; and (iv) to test the resilience of tropical ecosystems to major environmental perturbations during greenhouse climate states, effectively testing the "limits of life" under conditions of extreme warmth.This Virtual Site Survey will impact industry, higher education and international relations. UK government, industry and HE sector are working to establish closer collaborative relationships with Brazilian institutions as Brazil grows in international stature. The University of Birmingham is a major player in UK-Brazil relations. Our leadership of IODP Proposal 864 to drill offshore Brazil supported by this VSS will expand this UK-Brazil collaboration in future.

我们建议利用学术和工业合作伙伴之间的新合作，完成巴西大西洋东北部伯南布哥高原的虚拟现场调查，以支持国际海洋发现计划（IODP）题为“起源、演化和古环境”的完整提案 864热带南大西洋的白垩纪裂谷盆地是全球重要的有机碳生产、生物转化和埋藏场所。随着赤道大西洋门户的开放，这些条件发生了不可逆转的变化，这是世界海洋的根本性重组。这一门户开放的时间、过程和影响仍存在很大的不确定性。 IODP 预提案 864 概述了巴西边缘的钻探计划，以解决这些紧迫问题。 2014 年 7 月，IODP 科学评估小组 (SEP) 建议将预提案 864 发展为完整提案。然而，SEP 表示，预提案中包含的传统地震数据图像无法充分成像目标钻井位置。 IODP 要求在完整提案中提供更清晰的目标地层和地质结构的地震图像。该提案的主要目标是组装接受和实施完整提案 864 所需的完整现场调查包，而无需昂贵且耗时的船舶基地探险。项目合作伙伴 ION Geophysical 将为我们的虚拟现场勘测提供名为 BrasilSpan(TM) 的区域地震勘测。该工业数据集的质量和规模使学术船载调查所能达到的效果黯然失色。我们将把这些图像与巴西伯南布哥联邦大学 (UFPE) 的项目合作伙伴提供的经过重新处理的旧地球物理数据和当地地质知识结合起来。 BrasilSpan 调查提供的巴西大西洋边缘详细、广泛和深入的成像为建立伯南布哥高原钻探目标的详细地质模型以及评估钻探安全问题和科学目标风险提供了独特的机会。这些目标将产生独立且可发表的科学成果，并为拟议钻探探险的科学目标提供坚实的基础。这项工作还将通过增强巴西大西洋边缘前沿地区的地质知识来使碳氢化合物行业受益。相关 IODP 钻探提案的核心科学目标是在理解赤道大西洋门户逐步开放的构造、时间和环境后果方面提供一步改变。它们分为四个关键的子主题：（i）对白垩纪赤道大西洋门户（EAG）开放的时间和构造及其对全球生物地球化学循环、黑色页岩形成和海洋生物群演化的影响提供新的约束; (ii) 通过钻探未成熟的白垩纪（源）和第三纪（储层）序列以及来自更深埋藏单元的流体运移路线，限制石油系统中的深层生物圈群落； (iii) 生成极端温暖条件下热带海洋和陆地环境的多代理记录； (iv) 测试热带生态系统在温室气候状态下对主要环境扰动的恢复能力，有效测试极端温暖条件下的“生命极限”。这次虚拟现场调查将影响工业、高等教育和国际关系。随着巴西国际地位的提高，英国政府、工业界和高等教育部门正在努力与巴西机构建立更密切的合作关系。伯明翰大学是英国与巴西关系的重要参与者。我们在 IODP 864 号提案中的领导地位，即在该 VSS 的支持下在巴西近海钻探，将在未来扩大英国与巴西的合作。

项目成果

Reinterpretation of the tectonics and formation of the Pernambuco Plateau Basin, NE Brazil.

重新解释巴西东北部伯南布哥高原盆地的构造和形成。

• 发表时间: 2017
• 作者: Hoggett M

Tectonics and structure of the Pernambuco Basin

伯南布哥盆地的构造和结构

• 发表时间: 2017
• 作者: Hoggett M

Overview of IODP Pre-Proposal 864 Site Survey

IODP 预提案 864 现场调查概述

• 发表时间: 2016
• 作者: Hoggett M

The opening and evolution of the Equatorial Atlantic Gateway: state of the art and future ocean drilling proposals

赤道大西洋门户的开放和演变：最先进的技术和未来的海洋钻探建议

• 发表时间: 2022
• 作者: Nicholson U