Large Igneous Provinces Dr. Mike Coffin, coordinator Now at Institute for Marine and Antarctic Studies, University of Tasmania Data format and description of digital LIPS database [Digital files for the present-day plate boundaries are in the directory plate_boundaries (source: PLATES Project).] The LIPs data files are in three formats: GMT, shapefiles and PLATES. For information on GMT, check out the website: http://www.soest.hawaii.edu/wessel/gmt.html For information on PLATES, check out the website: http://www-udc.ig.utexas.edu/research/projects/plates.html LIPS.refs.txt = list of references for digital outlines of lips. Each reference has a unique 4-digit number assigned to it LIPS_mdb.zip - zip of an MDB file LIPS_shapfiles.zip - zip of shapefiles LIPS.2011.gmt = outlines of LIPs. GMT format LIPS.2001.points.gmt = LIPs whose location is noted by a single point. GMT format DIPREF.2001.gmt = dipping reflector locations (points only). GMT format hotspots.gmt = longitude, latitude of active hotspots LIPS.2011.dat = outlines of LIPs. PLATES format LIPS.points.2011.dat = LIPs whose location is noted by a single point. PLATES format DIPREF.2011.dat = dipping reflector locations (points only). PLATES format ======================================================================== GMT Format Data are stored as longitude/latitude points with a '>' indicating the end of a line segment. In the LIPs GMT files, a geographic description is appended to the first longitude/ latitude pair. A 4-digit reference number is at the end of the description, encased in parantheses (). PLATES Format Data are in ascii format. Each piece of data is stored as a 'string.' A string consists of a two-line header followed by lines with latitude, longitude, pen command (If pen command = 2, draw to that point. If pen command = 3, skip to that point.) The string is ended by: 99.0000 99.0000 3. The header describes the data and is for use with PLATES software. The first line of the header consists of a 4-digit reference number a 4-digit string number, and a geographic description of the data. The second line consists of a 3-digit plate identification number, the time of appearance and disappearance (in millions of years), a 2-letter code for the type of data, a 4-digit data type number, a 1-letter code for further description of the data type number, a 3-digit plate identification number, a 3-digit color code, and a 5-digit code that states how many points are contained in the string (not including the last point, 99.0000 99.0000). Format (in FORTRAN code) for the header is: format(i4,1x,1i4,1x,a) format(x,i3,x,f6.1,x,f6.1,x,a2,i4,a1,i3,x,i3,x,i5) ++++++++++++++++++++++++++++++++++++ Format (in FORTRAN code) for the latitude-longitude line is: format(f9.4,1x,f9.4,x,i1) Example below shows part of the string for the Agulhas Ridge, South Atlantic 9388 1 4000 METERS AGULHAS RIDGE, SOUTH ATLANTIC 701 70.0 -999.0 BA4000 701 3 819 -36.1577 17.1281 3 -36.2153 17.1167 2 -36.2413 17.1281 2 -36.2636 17.1556 2 -36.2710 17.1785 2 -36.2618 17.2015 2 -36.2320 17.2221 2 -36.2023 17.2427 2 -36.1893 17.2267 2 .... ..... .... ..... 99.0000 99.0000 3 For the first line of the header: 9388 = reference number 3 = string number AGULHAS RIDGE, ... = geographic description For the second line of the header: 701 = African plate id number 70.0 = age of appearance of the province -999.0 = default age of disappearance of province BA = data type code for bathymetric contours 4000 = data type code number (4000 meters) 701 = African plate id number 3 = color code number 819 = number of points in the string Data Type Codes BA Bathymetry (meters) SM Seamount VO Volcano Plate ID numbers: 101 = North America 102 = Greenland 107 = Baffin Island 110 = Alpha Ridge 112 = Chukchi Cap 113 = Northwind Ridge 201 = northern South America 202 = central South America 224 = Caribbean sea floor 229 = Eastern Panama 290 = Salado sub-plate on South America 291 = Colorado sub-plate on South America 301 = Europe 331 = United Kingdom Block 401 = Siberia 501 = India 503 = Arabia 692 = Eauripik Ridge 693 = Caroline Ridge 701 = southern Africa 702 = Madagascar 703 = Madagascar Ridge 704 = Seychelles 705 = Mascarene Plateau 714 = northwestern Africa 801 = Australia 802 = East Antarctica 807 = South New Zealand 831 = Kerguelen 845 = Ontong Java Plateau 853 = Elan Bank, Kerguelen Plateau 854 = Southern Kerguelen Plateau 901 = Pacific plate 902 = Nazca plate 909 = Cocos plate 922 = Easter plate (South Pacific)