Appendix VII

Appendix VII. Lead-isotopic data from bed-sediment and other samples from the Animas River Watershed [Concentration data given in parts per million, ppm (mg/g)]
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Sample No.		Description of Location	Sample Type	²⁰⁶Pb _____ ²⁰⁴Pb	²⁰⁷Pb _____ ²⁰⁴Pb	²⁰⁸Pb _____ ²⁰⁴Pb	Pb ppm (leach)
Sample No.		Description of Location	Sample Type	²⁰⁶Pb _____ ²⁰⁴Pb	²⁰⁷Pb _____ ²⁰⁴Pb	²⁰⁸Pb _____ ²⁰⁴Pb	Pb ppm (leach)
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Above Silverton, Colo.
95ABS101		upper Animas River below Cinnamon Gulch	fine sand & silt	18.538	15.586	38.129	270
95ABS102		Picayune Gulch	fine sand & silt	18.552	15.565	38.096	170
95ABS105		upper Animas River	coated pebbles	18.358	15.565	38.010	7400
95ABS103		Eureka Creek	fine sand & silt	18.377	15.567	37.988	730
95ABS104A		upper Animas River	fine sand & silt	18.383	15.564	37.976	1900
95ABS104C		upper Animas River	jarosite-Feox	18.305	15.535	37.849	4000
95ABS104D		upper Animas River	white precipitate	18.306	15.543	37.889	6800
95ABS107		Maggie Gulch	fine sand & silt	18.613	15.569	38.078	180
95ABS108 95ABS108D 95ABS108 aver		upper Animas River above Howardsville mill site	fine sand & silt	18.377 18.347 18.362	15.585 15.553 15.569	38.034 37.909 37.972	2100 2100
95ABS109		Cunningham Creek	fine sand & silt	18.968	15.629	38.382	500
95ABS110A		upper Animas River at	fine sand & silt	18.396	15.557	37.985	1000
95ABS110B		gaging station	coated pebbles	18.375	15.559	37.939	3800
95ABS111A		Arrastra Creek	fine sand & silt	18.815	15.596	38.234	4800
95ABS111B		Arrastra Creek	coated pebbles	18.854	15.628	38.313	13000
95ABS112		Boulder Creek	fine sand & silt	18.589	15.568	38.068	1400
95ABS113		Animas River at WRD gaging station	fine sand & silt	18.406	15.565	37.984	1900
Cement Creek
95ABS119A		Samples from natural ferricrete on hillside	goethite	18.351	15.557	37.939	5
95ABS118		Cement Creek above Gold King inflow	fine sand & silt	18.403	15.545	37.941	620
95ABS120A		Below confluence of N and S Forks of Cement Creek	fine sand & silt	18.342	15.552	37.919	640
95ABS120B		Below confluence of N and S Forks of Cement Creek	overbank sediment	18.360	15.584	38.010	2500
95ABS117		Iron bog, Cement Creek	fine sand & silt	18.374	15.556	37.935	5
95ABS116		Cement Creek below iron bog	fine sand & silt	18.419	15.580	38.046	500
95ABS115		Topeka Gulch	fine sand & silt	18.601	15.577	38.164	72
95ABS114 95ABS114D		Cement Creek at Memorial Park in Silverton, Colo.	fine sand & silt	18.400 18.425	15.552 15.576	37.959 38.037	320
Mineral Creek
95ABS121		Koehler adit drainage	colloids	18.502	15.564	38.081	3500
95ABS123		Mineral Creek	fine sand & silt	18.477	15.610	38.180	1000
95ABS122		Mill Creek	fine sand & silt	18.905	15.596	38.252	930
95ABS124		Browns Gulch	fine sand & silt	18.361	15.564	37.961	120
95ABS125		Mineral Creek above Burro Bridge	fine sand & silt	18.461	15.564	38.038	630
95ABS126		Middle Fork Mineral Creek above Bonner mine	fine sand & silt	18.828	15.613	38.322	120
95ABS127		Mineral Creek above South Fork	fine sand & silt	18.611	15.573	38.108	200
95ABS129		South Fork of Mineral Creek	overbank sediment	18.497	15.590	38.133	460
95ABS128		South Fork of Mineral Creek below iron bog	fine sand & silt	19.064	15.635	38.303	90
95ABS130		Mineral Creek at gaging station in Silverton	fine sand & silt	18.571	15.568	38.078	220
Animas River below Silverton, Colo.
95ABS131A		Animas River at railroad bridge below Silverton	fine sand & silt	18.407	15.557	37.958	1200
95ABS131B		Animas River at railroad bridge below Silverton	overbank sediment	18.414	15.588	38.040	1300
95ABSSB1		Deadwood Gulch	sand	18.452	15.571	38.024	910
95ABSSB-1D1				18.461	15.573	38.013
95ABSSB-1D2				18.440	15.550	37.956
95ABSSB2		Deer Park Creek	sand	18.437	15.567	38.030	1000
95ABS132		Sultan Creek below Molas mine	fine sand & silt	18.916	15.635	38.329	670
95ABS-MC		Molas Creek at Animas confl.	sand	20.248	15.734	38.842	20
95ABS-EC		Elk Creek at Animas confl.	sand	20.324	15.773	39.309	9
95ABS133		Lime Creek above US 550	fine sand & silt	20.500	15.759	38.920	8
95ABS134		Cascade Creek above US 550	fine sand & silt	20.347	15.802	38.950	6
95ABS-CC		Cascade Creek at confl.	sand	21.263	15.851	39.255	6
95ABS-GC		Grasshopper Creek at confl.	sand	21.269	15.839	39.242	10
95ABS149A		Animas River at KOA Campground above Bakers bridge	fine sand & silt	18.487	15.577	38.046	490
95ABS149B		Animas River at KOA Campground above Bakers Bridge	overbank sediment	18.496	15.479	37.811	570
95ABS135		Hermosa Creek above US 550	fine sand & silt	18.474	15.550	37.976	290
95ABS135D				18.479	15.560	38.001
95ABS136		Animas River above Trimble Bridge and below quarry	fine sand & silt	18.510	15.558	37.995	440
95ABS137		Animas River above 32nd Street Bridge, Durango, Colo.	fine sand & silt	18.540	15.558	38.010	290
95ABS138		Junction Creek at park	fine sand & silt	19.233	15.660	38.772	20
95ABS139		Junction Creek 1.7 km west of Durango, Colo.	fine sand & silt	19.353	15.662	38.623	6
95ABS141		Animas River, Red Lion Inn	fine sand & silt	18.559	15.585	38.095	260
95ABS140		Lightner Creek above confluence with Animas River	fine sand & silt	19.407	15.687	39.056	20
95ABS148		Animas River at BoR pump station site above US 550, Durango	fine sand & silt	18.592	15.575	38.073	320
95ABS142		Basin Creek, west of road	fine sand & silt	18.997	15.629	38.709	10
95ABS143		Animas River south of Weaselskin Bridge	fine sand & silt	18.586	15.580	38.100	140
95ABS145		Animas River above Bondad Bridge	fine sand & silt	18.637	15.569	38.135	31
95ABS144		Florida River north of Co. Rd. 318 bridge	fine sand & silt	19.271	15.667	38.938	8
95ABS146		Animas River at Cedar Hill gaging station, Colo.	fine sand & silt	18.684	15.587	38.219	28
95ABS147		Animas River above bridge, Aztec, New Mexico	fine sand & silt	18.661	15.578	38.129	64
Standards
SRM-2709	NIST Reference Soil			19.065	15.646	38.864	7
SRM-2710	NIST Reference Soil			17.819	15.537	38.141	5100
SRM-2711	NIST Reference Soil			17.086	15.419	36.888	1100
SRM-2711	NIST Reference Soil			17.097	15.430	36.936	1100
Blank							<0.01
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Appendix VII. Lead-isotopic data from bed-sediment and other samples from the Animas River Watershed

[Concentration data given in parts per million, ppm (mg/g)]