OFR 97-492: Ambler River Quadrangle NURE HSSR Study
 |
| About USGS / Science Topics / Maps, Products & Publications / Education / Publication: FAQ |
|
>> Pubs Warehouse > OF 97-492 > State Coverage > Alaska NURE data > Ambler River Quadrangle
[See History of NURE HSSR Program for a summary of the entire program.]
Geochemical samples were collected during August 1976 as part of the Los Alamos Scientific Laboratory (LASL) NURE Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) study of the Noatak area and parts of Baird Mountains, and Ambler River quadrangles. Totals of 862 sediment and 876 water samples were collected from 894 locations and analyzed for uranium. The results were published in the GJBX-87(78) report. This report includes results for 105 sediment and 107 water samples collected from 111 locations within the Ambler River quadrangle.
During June and July of 1978, LASL collected 1,009 sediment samples and 1,005 water samples from 1,014 locations within the remainder of the Ambler River quadrangle. All samples were analyzed by LASL for uranium, and sediment samples were also analyzed for up to 42 additional elements. LASL also reanalyzed the 105 sediment samples from the earlier GJBX-87(78) report for up to 42 additional elements. LASL was unable to complete the Ambler River quadrangle data release report. The data were sent to the Bendix Field Engineering Corporation in Grand Junction, Colorado and subsequently published as the microfiche GJBX-208(81) report. This report does not give any details on the sample collection or analytical methods used for these samples.
The following is a list of NURE sample types collected in the Ambler River quadrangle.
| Sediment Sample Type | Number of Samples | Water Sample Type | Number of Samples |
|---|---|---|---|
| Wet Streams | 733 | Streams | 731 |
| Dry Streams | 7 | Lakes | 381 |
| Wet Lakes | 374 | ||
| Total Sediments | 1,114 | Total Waters | 1,112 |
These Ambler River quadrangle samples were analyzed by one or more of the following methods:
Sediment Samples
Water Samples
The data in the NEW-FORMAT NURE data files consist of 1,114 reformatted sediment records and 1,112 reformatted water records from the GJBX-208(81) LASL quadrangle report. Any changes in the data or problems found are noted in the REFORMAT comment field.
The 105 sediment records from the earlier GJBX-87(78) Noatak Area study were the same as corresponding records from the later GJBX-208(81) quadrangle report with the exception of a few minor errors that were apparently corrected by LASL in the later quadrangle report. Only the GJBX-208(81) quadrangle report records were retained in the NEW-FORMAT NURE sediment data file and the minor differences between the source records were recorded in the REFORMAT comment field.
The 107 water records from the earlier GJBX-87(78) Noatak Area study were nearly the same as the corresponding records from the later GJBX-208(81) quadrangle report. Minor errors in the site description data for a few records were apparently corrected by LASL in the later quadrangle report and these differences between the records were recorded in the REFORMAT comment field. Also, uranium values for some records differ in the hundredths place. It appears that the uranium results were rounded to the hundredths place in the earlier GJBX-87(78) Noatak Area report but were truncated to the hundredths place in the later Ambler River HSSR GJBX-208(81) quadrangle report. No explanation for the difference was found in the reports and the difference was not noted in the REFORMAT comment field. Only the records from the Ambler River HSSR GJBX-208(81) quadrangle report were retained in the NEW-FORMAT NURE water data file. The slightly different values for uranium in waters from the Noatak Area study can be found in the GJBX-87(78) report.
Values for dissolved oxygen at 23 sample sites from the Noatak Area study were added from the GJBX-87(78) report and can be found in the O_DISS field. A comment in the REFORMAT field identifies these records.
The NURE HSSR data are now available online in two databases: The sediment database (also includes data for soils and some rocks) at http://tin.er.usgs.gov/nure/sediment/ and the water database at http://tin.er.usgs.gov/nure/water/. From these two websites, NURE HSSR data can be selected, examined, summarized, and downloaded by political boundaries (State and County), by quadrangle (1:250,000-scale, 1:100,000-scale, and 1:63,360-scale for Alaska or 1:24,000-scale for the Lower 48 States), and by hydrologic unit (drainage region, subregion, river basin, or sub-basin). Selected data can be downloaded as a dBase file, a shapefile, an HTML table, or ASCII text (tab- or comma-delimited).
Ambler River Quadrangle Sediment Data - 1,111 records
Ambler River Quadrangle Water Data - 1,109 records
Water samples from this quadrangle are reported to have been acidified with nitric acid but NOT filtered in the field.
LASL compiled all of the regional HSSR data from Alaskan NURE studies and produced a report [GJBX-32(83] that graphically displays the distribution of selected elements for most of the State. No additional geochemical data were released with this report.
Back to Alaska NURE data
Frequently Asked Questions Concerning NURE HSSR Data
Home Page: USGS National Geochemical Database - NURE HSSR data
Page written by Andrew W. Holt and Steven M. Smith
Contact: Steven M. Smith (smsmith@usgs.gov)
Version 1.20: August 07, 2000
Version 1.30: September 11, 2001
Version 1.40: January 13, 2006
| AccessibilityFOIAPrivacyPolicies and Notices | |
 |
|
