Natural Resources

Open File 013O/0139 - Geochemical Data from the Makkovik Area, Labrador (NTS 13O/03 and Parts of NTS 13O/02)

A.M. Hinchey

St. John's, Newfoundland, October, 2014

Abstract

This open file release consists of whole-rock geochemical data from rock samples collected in the Makkovik area of Labrador (NTS 13O/03 and parts of NTS 13O/02). The geological context of these samples and a description of the regional geology are contained in reports and maps by Hinchey (2007, 2013), Kennedy (2007), LaFlamme (2011), Hinchey and Davis (2013).

This data compilation contains whole-rock geochemical analyses of lithological units compiled from LaFlamme (2011), and Kennedy (2007). For these samples, details of the geochemical methods used are contained in the data sources (see References). In addition, this open file contains unpublished geochemical analyses collected by the author. For these samples, the analytical methods are outlined below. This open file places data in the public domain; no interpretation of the data is included in this report. The release includes the location, brief sample descriptions, and major-element and trace-element data. The data are tabulated below and are also available in digital format, i.e., comma separated value files (*.csv files).

The release also includes unprocessed data for several standards completed at the Newfoundland and Labrador Department of Natural Resources laboratory as well as at external commercial laboratories. These may be used by the reader to assess the accuracy of the analyzed data. Laboratory duplicate analyses of selected samples are also included, to assess analytical precision.

Major elements and selected trace elements were analyzed at the Department of Natural Resources laboratory using Inductively-coupled-plasma–emission-spectrometry (ICP-ES) (see Finch, 1998). Other trace elements, including REE’s, were analyzed at Activation Analytical laboratories (Actlabs; http://www.actlabs.com) using Inductively-coupled-plasma (ICP) emission spectrometry (ES) and mass spectrometry (MS). Analytical method of determination is indicated for each element in Appendices A to E. Details of geochemical methods, detection limits and standard analytical errors for all of the techniques applied are readily available from the relevant laboratories.

A value of -99 or -999, reported for a given element, indicates that it was not analyzed. All other negative numbers indicate the concentration of the specific element in the sample was below the detection limit (e.g., -0.01 indicates the measured value was below the detection limit of 0.01). Values above the upper limit are indicated by adding 1 to the last unit indicated (e.g., for K%, the value of 5.01 indicates the measured value was above the upper limit of 5.00). Major elements are reported in weight percent, and trace elements are reported in ppm.

The UTM coordinates are based on Zone 21 and NAD27.

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