User Tools

Site Tools


Clumped isotopes community

Available positions

Focused groups

Hi everyone,

I am happy to announce the creation of the iDeal group (Isotopologues in Diagenetic Environments And the Lithosphere). The iDeal group is a focused group with a broad range of interests:

  1. To study and understand paleo-fluid flow and carbonate cementation from sea-floor to subsurface
  2. To study hydrothermal systems and high-temperature carbonate phases
  3. To assess the potential use of clumped isotope as a tool to reconstruct the thermal history of basins
  4. To assess the potential and limitations of clumped isotope applied to diagenesis: in particular, to what extent do pH, kinetic fraction, pressure, and diffusion affect clumped isotope data when applied to diagenesis.
  5. Broadly speaking, to extend the application and calibration of clumped isotopes to a wider range of carbonate mineralogies and temperatures

The creation of the group is a direct result of our workshop in London last month, where it was decided that such a group would be useful. You can join the group by going to its dedicated home page and signing up (

Once you are logged in, you have access to a dedicated forum to discuss any topics related to applying clumped isotopes to diagenetic or lithospheric problems, as well as a chat and a file sharing system.

Everyone is welcome to join, whether you currently work on diagenesis or not. The idea is to create a forum to exchange knowledge, to foster collaborations and to effectively coordinate calibration efforts between labs (i.e. different mineralogies, temperature ranges, etc…). We also would like to foster discussion between academics and industry representatives.

Hope to see you all very soon on the iDeal forum!


Upcoming events

2014 Fall Meeting session - Between a cold outcrop and a hot place: Validation of clumped isotopes and other novel geochemical proxies to shallow crustal geothermometry

Hello clumped isotope colleagues,

We wanted to let you know about a session that we are organizing for this year's AGU Fall Meeting: “Between a cold outcrop and a hot place: Validation of clumped isotopes and other novel geochemical proxies to shallow crustal geothermometry”. Please see the session details below. With this email we are specifically targeting folks within our growing community interested in higher temperature applications of clumped isotopes, and we encourage you all to consider submitting an abstract for a poster or talk. Also, please feel free to forward this email on to others who you think might be interested. Our goal with this session is in part to interact with other proxy communities, so we are hoping to draw interest from a variety of fields (e.g., thermochronology, organic geochemistry, etc).

Abstract submissions opened today and can be found here. The deadline for submissions is August 6th, 2014.

We hope you are having a productive summer and we look forward to seeing you in San Francisco!

Best, Greg Henkes, Cedric John, Tobias Kluge, and Ben Passey

Session ID#: 1612

Between a cold outcrop and a hot place: Validation of clumped isotopes and other novel geochemical proxies to shallow crustal geothermometry

The reconstruction and interpretation of temperatures in the geological past has historically focused on low-temperature systems (< 50°C) relevant to past climates, or high temperature systems (> 350°C) relevant to metamorphic and igneous processes. Quantitative paleothermometers suitable for intermediate temperatures (50 – 350°C) have been elusive, particularly in settings lacking minerals suitable for fluid inclusions and thermochronology. Temperatures between 50°C and 350°C are relevant to hydrocarbon maturation, mechanics of shallow faulting, genesis of hydrothermal ores, and diagenesis of chemical phases important for paleoclimatic reconstruction.

This session encourages the presentation of innovative techniques and new proxies that may provide quantitative constraints on surface to subsurface processes in the intermediate temperature range (50-350°C), for example, using clumped isotopes, triple oxygen isotopes, non-traditional stable isotopes, fluid inclusions, or organic geochemical proxies.

Confirmed Invited Speakers: Daniel Stolper, Caltech John Eiler, Caltech

Sponsors: VGP - Volcanology, Geochemistry and Petrology PP - Paleoceanography and Paleoclimatology

Dinner at Goldschmidt 2013 - Wednesday 28th Hi guys, In case you are not aware of it, there is a dinner organised for the clumped isotope community tomorrow at Goldschmidt. So far I have the following confirmed for tomorrow night:

Isabel Milan Andrew Linton (2 persons) John MacDonald Veerle Vandeginste Annabel Dale Katie Snell Kristin Bergmann Mattieu Daeron Magali Bonifacie (2 persons) John Eiler (will try) Ben Passey (maybe) Jennifer McKay This means roughly 15 persons coming. Is this information correct?

If not, please let me know asap if I need to add you or remove you, I will try to reserve a restaurant for us soon (

I propose that we meet at 7:30 pm in front of the reception, with a view of being at the restaurant by 8 pm.

Cheers, Cedric

The 3rd International Workshop on Clumped Isotopes on January 10-11, 2013 at Harvard University.

The study of multiply-substituted isotopologues (or clumped isotopes) is a growing field within Earth sciences and geochemistry. To date, most research has focused on either clumping in carbon dioxide or carbonate minerals with applications to atmospheric budgets, paleothermometry and diagenesis. But, there are also a series of new applications and discoveries.

As we meet for the 3rd International Workshop on Clumped Isotopes we expect to discuss the existing carbonate and CO2 clumped isotope work as well as clumping in O2, organic molecules and other systems. The workshop will provide a small forum (80 to 100 people) for scientists to share novel insights into clumped isotope systematics, discuss calibrations of the carbonate clumped isotope thermometer, present new results on applications to Earth sciences, and explore exciting new avenues of clumped isotope research.

If you are interested in attending, please fill out this brief application form by early October:

The application includes an area where you can give a short description of what you would like to present or your research focus. Space is limited to 100 participants, so please apply early.

Once your application has been accepted, you will receive additional information about hotels and logistics, as well as information on how to submit an abstract. A $100 registration fee will be charged to all participants (waived for students), which will be used for meals and student travel support.

We hope that you will be able to join us for this engaging workshop. Please contact Lisa Matthews at with any questions.

Sincerely, Dan Schrag (Harvard)

Hagit Affek (Yale)

Ben Passey (Johns Hopkins)

Kate Dennis (Princeton)




* <fc #0000FF>Reminder: 2nd workshop on clumped isotopes (abstract submission and registration)</fc> *

Dear Colleagues,

We would to remind you that you are still welcome to register to the 2nd International Workshop on Clumped Isotopes, to be held at Imperial College London on the 10, 11 and 12 August 2011!

Abstract submissions and registration deadline is June 10th 2011, so it is coming up quickly.

We have already many registered participants and unfortunately, due to the size of the rooms, the number of participants will be capped to 100. So to ensure you can participate register quickly using the following website:

You will also be able to find on this website all the informations about the workshop and possible accommodations.

We are looking forward to see you in London !

* <fc #0000FF>2nd workshop on clumped isotopes: abstract submission is now opened</fc> *

Dear all,

You can now submit your abstracts for the workshop at Deadline for abstract submission is June 10th, 2011.

You can also now book accommodations at a reduced price, and the rooms will be allocated on a first come first served basis. You need to register to the workshop to receive information about accommodations.

* <fc #0000FF>2nd workshop on clumped isotopes, Imperial College London, August 10-12 2011</fc> *

Dear all,

We have the pleasure of announcing the 2nd International Workshop on Clumped isotopes, to be held at Imperial College, in the heart of London and minutes away from the Royal Albert Hall and the Natural History Museum. The workshop is co-organised by Imperial College London (Cedric John) and the University of East Anglia (Paul Dennis), and will take place the week preceeding the Goldshmidt Conference in Prague. Scientists flying to Europe for the Goldshmidt conference could take this opportunity to transit via London for the workshop.

The goal of the workshop is to gather all researchers working or intending to work on clumped isotope, to exchange practical knowledge on the technique, and to work towards inter-laboratory calibrations and standardisation of the methods.

Preliminary program:

• Tuesday, August 9: Ice breaker party
• August 10 - August 11: Clumped isotope workshop with oral presentations and posters. Conference dinner on the 11th of August
• Friday, August 12: Optional practical workshop in the stable isotope labs at Imperial College or the University of East Anglia 

We anticipate the workshop to be free of charge, participants will simply need to cover their travel and accommodation costs.

At this stage we would appreciate if you could pre-register as soon as possible for the workshop: this will give us an idea of how many participants to expect, and how many presentations will be submitted. The final deadline for registration and abstract submission is June 10, 2011. To register, please visit the following link:

We are looking forward to seeing you in London for the workshop!

The organisation committee (Cedric John, Paul Dennis, Anne-Lise Jourdan, Simon Davis)


There is currently a mailing list used by Caltech-related people. Should this become a community-wide forum, or should someone set up a separate list comparable to the isogeochem list?

Directory of clumped-isotope labs

California Institute of Technology

Eidgenössische Technische Hochschule (ETH) Zürich

  • Status (June 2010): up and running
  • Prior experience with: carbonatites, forams, lake carbonates
  • Contact: Stefano Bernasconi (
  • Location: Zurich, Switzerland

Goethe University Frankfurt

Harvard University

Imperial College London

  • Status (September 2012): up and running, two MAT 253's with manual lines, w/automated carbonate device in preparation
  • Prior experience with: Diagenetic calcite and dolomite, nodules, biogenic carbonates
  • Contact: Cedric John (
  • Location: London, UK

Institut de Physique du Globe de Paris

Johns Hopkins University

  • Status (Aug 2010): up and running, MAT 253, w/automated carbonate device
  • Prior experience with: soil carbonates, shells, order/disorder experiments
  • Contact: Ben Passey (
  • Location: Baltimore, Maryland, USA

Laboratoire des Sciences du Climat et de l'Environnement

  • Status (May 2010): early installation stage
  • Prior experience with: soil carbonates, speleothems, molluscs
  • Contact: Mathieu Daëron (
  • Web page: (none yet)
  • Location: France, Paris area

Tokyo Institute of Technology

University of California, Los Angeles (UCLA)

  • Prior experience with: foraminifera, coccoliths, terrestrial and marine mollusks, soil nodules, inorganic precipitation experiments.
  • Contact: Aradhna Tripati (ripple at ess dot ucla dot edu)
  • Location: Los Angeles, CA, USA

The University of Chicago Stable Isotope Ratio Laboratory

University of East Anglia

University Of Saskatchewan

  • Status (March 2011): system calibration stage
  • Prior experience with: molluscs, lake carbonates, forams
  • Contact: Andrew Kingston (
  • Location: Saskatoon, Saskatchewan, Canada

Woods Hole Oceanographic Institution

  • Status (May 2011): Lab renovation
  • Prior experience with: speleothems, corals, meteoritic carbonates, Precambrian carbonates, inorganically precipitated carbonates, CO
  • Contact: Weifu Guo (
  • Location: Woods Hole, MA, USA

Yale University

community.txt · Last modified: 2014/06/25 16:21 by cjohn