Perturbation of the Earth System at the Proterozoic-Phanerozoic transition and the resilience of the biosphere

Lead Research Organisation: British Geological Survey
Department Name: NERC Isotope Geosciences Laboratory

Abstract

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.

Planned Impact

The nature of the research topic means that much of the direct benefit will be for the academic community (see Academic Beneficiaries), however as it tackles the emergence of complex life on Earth there will be significant public interest in the research topic, approach, progress and outputs. Going beyond the topic itself, our approach is non-traditional in that it is highly integrative and seeks to develop and exploit a step change to develop inter-operable multi-parameter datasets and models, impacting how others research similar 'Earth System' topics.
Beyond the academic community (see Academic Beneficiaries) we expect the general public, in UK and China, will be beneficiaries of the research. The 'Cambrian explosion' and the origin of complex life on our planet was listed in an Economist article 'Life, the multiverse and everything, Science has remade the world, but scientists are not finished yet' (6th August 2015) as one of Science's six unsolved mysteries. This highlights that the research topic covered by this proposal is one of the big ones that captures the public's interest. We will develop novel web, using Quick Response (QR) codes and MediaWIKI infrastructure to communicate project science at sites where the rocks outcrop, and museums. We expect this to generate interest in the Earth and Biological Sciences, highlighting how the Earth system has evolved and operated prior to becoming our familiar world, will allow us to engage with the public and get them to think about complexity, feedbacks, and how systems evolve. Whilst the current changes facing the planet are operating at different timescales there are parallels to be made and lessons to be learnt from studying the 'Cambrian explosion'.
The focus on 'data mining and management' within this project allows us to identify those organisations and professional scientific bodies who are invested in developing geoscience 'data management' tools. In the case of this project, such organisations would include the International Commission on Stratigraphy (ICS), the Interdisciplinary Earth Data Alliance (IEDA), and the EARTHTIME Initiative. These organisations will benefit from our engagement with such systems and using this project to accelerate development in identified key areas. These will include aiding the federation of data from the GEOCHRON databased with the stratigraphic data in the GeoBiodiversity Database, and the development of 'age-model' tools within the later.
A third group of beneficiaries represent the industries that are engaged with exploring the resource potential of late Precambrian and earliest Phanerozoic sedimentary successions. The resources in question are primarily hydrocarbons although economic sulphide and phosphorite deposits occur within these successions. With respect to hydrocarbons the late Precambrian is considered a frontier for exploration, and significant accumulations of Precambrian occur in basins such as the South Oman Salt Basin. The primary research we will generate will include information about the geochemistry of specific successions of the South China Platform, information about their palaeogeographic history and information about basin development. Companies and industry funded research consortia will benefit from the approach developed in this research programme. Furthermore, the data generated, placed within the developing global 4D framework will allow us to export information to other basins which may have an economic potential (e.g., Oman, Brazil).

Publications

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Yang C (2021) The tempo of Ediacaran evolution. in Science advances

 
Description This research was focused on improving the resolution of age-models for the Proterozoic-Phanerozoic transition, about 600 to 520 million years ago. This interval of time was witness to the 'rise of animals', extreme climate change (i.e., glaciations) and changes in how the major chemical cycles (e.g., Carbon, nitrogen) and to understand the nature of this key evolutionary transition researchers work on rocks sections across the globe. Like a big jigsaw puzzle, we have to combine those to see the complete picture, but may of the pieces are missing and we don't have a target image - we have to create the best reconstruction(s) to understand what were the main drivers for this evolutionary transition. Understanding the age of the rocks sections being studied is key to solving this jigsaw puzzle - it allows us to put the records in order and establish a timeline for period of time. It also allows us to assess the global or regional nature of events. Our work established a new database of ages for rocks in this time interval, dating key fossil assemblages, providing new ages and refining ones that had been previously published. This new chronology has allowed us to test previously held models for the chronology of this interval, and propose new ones. In addition to the new data we have focused on changing the narrative within our research community, from competing 'certain' mutually exclusive models towards a more nuanced appreciation of the uncertainties with these reconstructions. This has been achieved through working with international partners beyond the funded projects.
Exploitation Route We have produced a database of radio-isotopic ages with metadata that can be developed further by others.
Sectors Education,Environment

 
Description Geochronology activity and demonstration as part of the British Geological Survey Open Day October 2019 
Form Of Engagement Activity Participation in an open day or visit at my research institution
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Public/other audiences
Results and Impact 70 members of the public participated in a combined activity and demonstration around the theme of geochronology and geological time, as part of the annual British Geological Surveys public open day. The demonstration included a talk and discussion about geological time combined with the 'Corridor of Time' activity which comprised a 46 metre scaled timeline (1cm equals 1 million years) of Earth history, from human history back to the formation of the Earth and Solar System. This demonstrated the tempo of evolution and the vastness of geological time compared to human histories. This was combined with a 'Speed dating' activity where members of the public came into the mass spectrometry laboratory and we explained how we obtain absolute dates on rocks and minerals, and then they were given a chance to select a mineral for analyses then and there - the sample was a real research target that contains detrital grains with a range of ages, from ~400 to 2700 million years. Throughout the day as more minerals were dated we kept a leader board and a prize was given to the person who picked the oldest grain. The capacity of 70 participants was set by the size of the laboratory and the nature of the activity. Feedback from the participants was wholly positive.
Year(s) Of Engagement Activity 2019
 
Description Geological time: we're on a roll! A contribution to Science in the Park 2023, part of British Science Week 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Public/other audiences
Results and Impact Blurb used to advertise the event: Have you ever wondered just how far back in time we can go? What about how long humans have been on the planet? Whilst we can't time travel (yet), we can use geology to give us a window into our planet's history to look for answers. Join us as we explore the vastness of geological time and put the history of Earth into perspective. We'll explore Earth's timeline starting with the formation of our planet 4.567 billion years ago and roll our way through time to the present day, stopping by key geological events such as the evolution of complex life 600 million years ago. Come and explore the major events in Earth's history, life on the planet and how we got to where we are today!

The purpose was to engage with the general public, to relate human and historical timescales to the longer timescales over which geological timescales operate.
Year(s) Of Engagement Activity 2023
URL https://wollatonhall.org.uk/science-in-the-park/
 
Description Public Open day for the British Geological Survey - we contributed two activities: (1) Speed Dating; and (2) the Toilet Roll of Time. 
Form Of Engagement Activity Participation in an open day or visit at my research institution
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Public/other audiences
Results and Impact (1) Speed Dating - demonstrating U-Pb dating in real time, along with getting people into the sample prep and mass spectrometry laboratories;
(2) Toilet Roll of Time - an interactive demonstration that explored historical and geological timescales and included a 50 meter long time scale that illustrated the tempo of Earth's evolution.
~2000 people attended the event, a subset of whom interacted with our two activities.
Year(s) Of Engagement Activity 2019,2022
URL https://www.bgs.ac.uk/news/bgs-open-day-2022/