Central Andes Geochemical Database

Here we provide a data compilation of the Central Andes in form of a clickable map. The data base has been published by: 

Mamani et al (2010) (see reference and abstracts).

The compilation contains more than 1500 major- and trace-element and 650 Sr-, 610 Nd-, 570 Pb-isotopic analyses of Meso-Cenozoic (190-0 Ma) magmatic rocks in southern Peru and northern Chile mostly from our new data but also from the literature, and some unpublished, data. This data set documents compositional variations of magmas since Jurassic time, with a focus on the Neogene period when major Andean crustal thickening developed and its influence on magma composition was most pronounced.

The Central Andes Geochronology Database provides a compilation of ages for the Central Andes. Sample ages are shown in different colors for their geological age.

To open Map click here: >>> MAP <<<

This compilation is based on:

Mamani et al (2010)
R. Pilger (link to source)
and additional data from the literature.

Mamani, M., Wörner, G. & Sempere, T. (2010). Geochemical variations in igneous rocks of the Central Andean orocline: Tracing crustal thickening and magma generation through time and space. Geological Society of America Bulletin, 122: 162-182. DOI 10.1130/B26538.1

Mamani, M., Tassara, A. & Wörner, G. (2008). Composition and structural control of crustal domains in the central Andes. Geochemistry, Geophysics, Geosystems, 9, Q03006, DOI:10.1029/2007GC001925

You can filter the data according to author, country, volcanoes, age, compositions, rock types and locations. It's also possible to download data as an excel file. With the clipboard function you are able to create your own set of samples and download it as an excel file.

Central Andes time scale map database

This map provides sliders to select an age range of the samples for a timescale from 0 Ma. to 200 Ma. 

Samples of a selected age range will be shown in the map. Every sample has a clickable marker, which provides geochemical and location data.

Please follow this >> LINK << to open the timescale map.

Andes Ignimbrite Database (AID)

The present database forms part of the PhD thesis:

"A remote sensing and geospatial statistical approach to understanding distribution and evolution of ignimbrites in the Central Andes with a focus on Southern Peru" 

>>> Link to Map on ArcGIS Website <<<

by M. Brandmeier (2014) supervised by Prof. Dr. G. Wörner

Ignimbrites were mapped using published data (see references for each ignimbrite), remote sensing data and new data from Southern Peru. Information about age, thickness and a brief description (where available) are also included. Furthermore, the areal extent and volume for each ignimbrite were calculated (using an equal area projection) for ignimbrites lacking this information (for further information refer to Chapter IV of thesis). The option "bookmarks" allows to quickly find the most important calderas and ignimbrites (e.g. La Pacana caldera, Cerro Galán, Nazca ignimbrites...). 
The map will open showing the Cerro Galán caldera and related samples. For an overview of the whole database extent, the option "overview" in the "bookmarks" can be clicked. Use the option "layers" to enable or disable layers.

Please note that this is a compilation and does not claim completeness! If you have any suggestions or want to use/edit data, please do not hesitate to contact me:

This email address is being protected from spambots. You need JavaScript enabled to view it.

DFG-Talk

DFG-Rundgespräch „Geochemical Data Bases and Sample Archiving“

Motivation

The past decades are marked by an accelerating accumulation of published geochemical data. While each new dataset adds to an ever more detailed picture of how Earth formed, comprehensive approaches including all data, or simply keeping an overview of all data becomes increasingly difficult. Digital tools and new rules of how to publish data are required. New digital tools should not only be passive in the way that data are made accessible. Such tools need to allow for access, display and modelling of all available data. Several national and international initiatives exist to provide structured geo-related data. National initiatives are limited to either local solutions or particular datasets, e.g. marine and geophysical data. The urgent need for structured geochemical data is widely acknowledged. This has already been realised in the US, where NSF-funded geo-related databases and -archives have been developed (e.g. EarthChem).

In addition, as more advanced analytical tools become available, older and previously well characterized samples become ever more valuable. Therefore, it is an additional urgent requirement to assure future access to well- archived sample sets.

With this DFG Rundgespräch we initiate a national initiative in Germany to  secure and further develop comprehensive geochemical data bases and archiving of important sample collections for future use, but a strategy for digital geochemical data in general.

As a first step, 27 researchers were invited to represent the field of geochemistry and national research institutions to this Rundgespräch, which took place from Feb. 22 to 24 at the Geoscience Center Göttingen (GZG, Abtl. Geochemie).

The major goals of this DFG Rundgespräch were:

Define the present status and future needs of Geochemical Databases nationally and internationally. In particular,

-      Inform and provide an overview of existing national geo-initiatives e.g. GEO.X, Pangea, GEOROC, re3data.org and what these offer and/or intend.

-      Inform and provide an overview of existing international geo-initiatives e.g. EarthCube, EarthChem, IEDA, Data Journals, General Infrastructures and what these offer and/or intend.

-      Inform and provide an overview of the need for a rock sample repository.

-      Define the future direction of Geochemical Databases in Germany and their link to EarthChem.

-     How could a national contribution to digital database be developed and maintained?

      (->integrate existing facilities and initiatives). The future of GEOROC: Currently, GEOROC i9n combination with PeDB of EarthChem is probably one the most used and largest geochemical databases for igneous rocks world wide. At present, it is exclusively funded by the Max Planck Society, but this support will end within the foreseeable future.

Develop guidelines for publishing geochemical data from DFG- and other funded projects.

-      What can the community provide to realise Geochemical Databases?

-     What can the DFG provide to secure the development of Geochemical Databases?

Sample archiving                                                                                                          

-     Define responsibility for archiving and acessability of important samples for geochemical studies, scientifically, logistically and financially

-     How could a national/European rock sample repository look like?

-     Discuss the need and obligation to link samples obtained in DFG-funded geochemical projects to the „International Geo Sample Number Implementation Organization, IGSN (www.igsn.org).

Research in Big Data Geochemistry

Geochemical research has already been impacted by Big Data research and will further change the way geochemists do geochemistry. Thus one major goal is to review existing examples of Big Data geochemistry from the literature and develop future directions of research in Germany 

Participants

For further details see:

DFG-Rundgespräch Report (in German) 

(1) Introduction and Motivation (Gerhard Wörner)

(2) EarthChem, PetDB, NSF-initiatives (Kerstin Lehnert, will be provided later)

(3) GEOROC (Bärbel Sarbas)

(4)  Big Data in Geochemistry (Dominik Hezel)

(5)  GFZ Data management  (Kirsten Elger)

(6) Pangea (Stefanie Schumacher

(7) EU-connections (Nick Arndt)

(8) Working Group Sample Archives (Gerhard Wörner)

(9) Working Group Digital Geochemical Database Infrastructure (Dominik Hezel)