Newberry, R.J.
Herriott, T.M.
Wartes, M.A.
Gillis, R.J.
Wypych, Alicja
2016
Major-oxide and trace-element geochemistry of mafic rocks in the Carboniferous Lisburne Group, Ivishak River area, northeastern Brooks Range, Alaska
report and digital data
Raw Data File
RDF 2016-2
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
2 p.
http://dx.doi.org/10.14509/29563
The Alaska Division of Geological & Geophysical Surveys, in collaboration with the University of Alaska Fairbanks, collected mafic rocks in the Ivishak River area of the northeastern Brooks Range during summer 2009 for geochemical sampling. The sampled rocks, including lava flows, sills, and limy volcaniclastic strata, crop out within the carbonate-platform succession of the Carboniferous Lisburne Group. Refer to Herriott and others (2011) for additional information regarding the geologic and geographic context of these samples, preliminary implications of the geochemical data presented here, and a summary of known mafic rock occurrences in the Arctic Alaska terrane. The analytical data tables associated with this report are being released in digital format as comma-delimited text (CSV) files.
Mafic rock samples were collected from the Lisburne Group for petrographic, geochronologic, and geochemical analyses.
>border: Outline of the study area.
>rock-major-minor-oxide-trace-element: Major- and minor-oxide and trace-element analysis of rock samples
2009
publication date
None planned
-147.730504
-147.704670
69.079843
69.000217
ISO 19115 Topic Category
geoscientificInformation
Alaska Division of Geological & Geophysical Surveys
Analyses and Sampling
Geochemical Data
Geochemistry
Igneous
Igneous Rocks
Major Oxides
Trace Elements
Alaska Division of Geological & Geophysical Surveys
Brooks Range
Ivishak River
Sagavanirktok Quadrangle
Alaska Division of Geological & Geophysical Surveys
Ellesmerian Sequence
Lisburne Group
Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America
Carboniferous
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
Alaska Division of Geological & Geophysical Surveys
GIS Manager
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
(907)451-5020
dggsgis@alaska.gov
8 am to 4:30 pm, Monday through Friday, except State holidays
Wesley K. Wallace (deceased) collected additional samples from the Lisburne Group mafic rocks and mapped the geology of the area with Herriott and Gillis. This work was funded by the State of Alaska.
Herriott, T.M.
Wartes, M.A.
Newberry, R.J.
Wallace, W.K.
Gillis, R.J.
2011
Geology, geochemistry, and regional implications of mafic igneous rocks in the Carboniferous Lisburne Group, Ivishak River area, northeastern Brooks Range, Alaska (poster): The Sixth International Conference on Arctic Margins, 31 May-2 June 2011, Fairbanks, Alaska
Poster and Presentation
Herriott, T.M. and others, 2011
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
1 sheet
http://dx.doi.org/10.14509/29562
The chemistry of these rocks was determined using Slab XRF petrographic analysis because it is an expedient and cost-effective method of determining the bulk rock composition of fine-grained igneous rocks. The analytical results presented in this report were qualitatively evaluated by DGGS staff for general consistency with the geologic setting. However, significant additional geochemical analysis and geologic study would be required to fully evaluate petrogenesis and tectonic setting of the study area.
not applicable
This work should be considered reconnaissance in nature. Significant additional geochemical analysis and geologic study would be required to fully evaluate petrogenesis and tectonic setting of the mafic rocks in the Ivishak River area.
Location data were collected with handheld GPS devices, with location accuracy error typically less than 10 meters.
Keller, A.S.
Morris, R.H.
Detterman, R.L.
1961
Geology of the Shaviovik and Sagavanirktok rivers region, Alaska
Professional Paper
P 303-D
United States
U.S. Geological Survey
p. 169-222, 6 sheets, scale 1:500,000
http://dggs.alaska.gov/pubs/id/3831
500000
paper
1961
publication date
Keller, A.S. and others, 1961
sample selection
Sample selection - Mafic rock samples were collected from the Lisburne Group for petrographic, geochronologic, and geochemical analyses. A diverse suite of geochemistry samples was obtained to evaluate petrogenesis and tectonic setting for the mafic rocks and to constrain the lithologic variability in the interval. We typically collected several kilograms of rock at each sampling locality, using a rock hammer to sample material beneath the weathering rind of an outcrop's surface. Sampled material was placed in muslin or canvas bags that were labeled with pertinent stratigraphic and location information.
Keller, A.S. and others, 1961
2009
Sample preparation - Rock samples were prepared by Advanced Instrumentation Laboratory at the University of Alaska Fairbanks. The preparation included cutting samples into 4-cm-diameter discs and polishing them on a lapidary wheel.
2009
Slab XRF analysis - The polished sample slabs were directly analyzed using the PANalytical Axios wavelength-dispersive XRF and SuperQ(tm) software. Nb, Rb, Sr, Y, and Zr were measured using the 37mmRbSrYZr analytical routine; other elements were measured with the IQ+37mmVac analytical routine. The 37mmRbSrYZr routine uses specific predetermined peak and background positions for which X-ray intensities are measured for 2-800 seconds (depending on the element). The intensity of the Rh Compton peak was used to estimate mass-absorption coefficients (MACs) for both unknowns and well-characterized natural standards. Peak intensities were computed and converted to concentrations using calibration curves employing at least ten natural rock standards. These procedures were routinely checked by analysis of secondary natural standards that were not employed in making the calibration curves. Elemental abundances are typically within 2-5 percent of the amount present for concentrations greater than 10 times the detection limit; within 5-10 percent of the amount present for concentrations 4-10 times the detection limit; and within 30 percent of the amount present for concentrations near the detection limit. The IQ+37mmVac program scans over a series of energies corresponding to a range from Ce K-alpha to O K-alpha. Peak heights and backgrounds and X-ray elemental interferences were picked with the software and checked manually to ensure quality control. Elemental abundances for all elements with atomic numbers between 8 and 92 were estimated from artificial standards; these estimations were used to calculate MACs for each element present above the detection limit. Revised concentrations were employed to calculate revised MACs until a stable solution was determined. Elemental abundances were then normalized to 100 percent. The software was routinely checked using pressed pellets of well-characterized natural rock standards. Elemental abundances are within 1-2 percent of the amount present for major elements, 2-5 percent of the amount present for minor elements, and 5-10 percent of the amount present for trace elements.
2009
point
.000001
.000001
decimal degrees
North American Datum of 1927
Clarke 1866
6378206.4
294.9786982
rdf2016-2-border.shp
Outline of the study area.
Alaska Division of Geological & Geophysical Surveys
border
rdf2016-2-rock-major-minor-oxide-trace-element.csv,
rdf2016-2-rock-major-minor-oxide-trace-element-methods.csv
Major- and minor-oxide and trace-element analysis of rock samples.
Alaska Division of Geological & Geophysical Surveys
rock-major-minor-oxide-trace-element
SAMPLE
Label assigned to identify the sample.
Alaska Division of Geological & Geophysical Surveys
Generic example of a sample identifier: YYAAA9999X: YY=last two digits of year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database.
LONGITUDE
Longitude, NAD27
Alaska Division of Geological & Geophysical Surveys
-147.72647
-147.70869
decimal degrees
LATITUDE
Latitude, NAD27
Alaska Division of Geological & Geophysical Surveys
69.00166
69.0784
decimal degrees
COLLECTOR
The geologist who collected the sample.
Alaska Division of Geological & Geophysical Surveys
The samples presented in this report were collected by: Gillis, Robert J., and Herriott, Trystan M.
DESCRIPTION
Description of the sample
Alaska Division of Geological & Geophysical Surveys
Characters 1 to 254 of a brief sample or station description.
DESCRIP_2
Extension of the sample or station description for descriptions greater than 254 characters in length
Alaska Division of Geological & Geophysical Surveys
Characters greater than 254 of the sample or station description.
DESCRIP_3
Extension of the sample or station description for descriptions greater than 508 characters in length
Alaska Division of Geological & Geophysical Surveys
Characters greater than 508 of the sample or station description.
NULL
The descriptive text is shorter than 508 characters.
Alaska Division of Geological & Geophysical Surveys
SiO2_pct
Silicon dioxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
32.1
62.9
percent
Al2O3_pct
Aluminum oxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
7.27
15.6
percent
CaCO3_pct
Calcium carbonate values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
NULL
Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
41.6
41.6
percent
CaO_pct
Calcium oxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
NULL
Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
0.759
8.1
percent
FeO_pct
Iron oxide (+2) values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
0.333
9.52
percent
FeS2_pct
Iron disulfide values measured in percent; Method: Calculation
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
NULL
Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
6.08
6.08
percent
K2O_pct
Potassium oxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
1.03
1.2
percent
MgO_pct
Magnesium oxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
3.59
5.52
percent
MnO_pct
Manganese oxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
0.0437
0.119
percent
Na2O_pct
Sodium oxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
0.0352
5.56
percent
P2O5_pct
Phosphorus oxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
0.243
0.58
percent
TiO2_pct
Titanium dioxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
1.57
2.68
percent
BaO_pct
Barium oxide values measured in percent; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
NULL
Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
0.02
0.0424
percent
Cl_ppm
Chlorine values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
36.8
131
parts per million
Cr_ppm
Chromium values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
51.9
281
parts per million
Cu_ppm
Copper values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
28.2
146
parts per million
F_ppm
Fluorine values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
NULL
Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
1990
1990
parts per million
Ga_ppm
Gallium values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
24.9
27.3
parts per million
Ni_ppm
Nickel values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
NULL
Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
97
162
parts per million
Pb_ppm
Lead values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
NULL
Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
23
41.4
parts per million
Rb_ppm
Rubidium values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
17.5
39.8
parts per million
S_ppm
Sulfur values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
NULL
Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
342
1010
parts per million
Sr_ppm
Strontium values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
197.1
616.6
parts per million
V_ppm
Vanadium values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
178
314
parts per million
Zn_ppm
Zinc values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
84
186
parts per million
Zr_ppm
Zirconium values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
152.2
309
parts per million
Nb_ppm
Niobium values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
17.8
49.5
parts per million
Y_ppm
Yttrium values measured in parts per million; Method: X-Ray Fluorescence
Advanced Instrumentation Laboratory at the University of Alaska Fairbanks
15.3
34
parts per million
Alaska Division of Geological & Geophysical Surveys
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
(907)451-5020
(907)451-5050
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Please view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
RDF 2016-2
The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
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ASCII tabular files
http://dx.doi.org/10.14509/29563
Free download
20160208
Alaska Division of Geological & Geophysical Surveys
Metadata Manager
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
(907)451-5020
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys.
http://www.dggs.alaska.gov/metadata/dggs.ext
dggs metadata extensions