Analytical results and sample locality map of stream-sediment and heavy-mineral-concentrate samples from the Moses and Dennison Peak Roadless Areas, 

INTRODUCTION

From 1979 to 1982, we conducted a reconnaissance geochemical survey of the Moses and Dennison Peak Roadless Areas, Tulare County, California. 
The Moses and Dennison Peak Roadless Areas comprise about 45 mi^ in the Sequoia National Forest, of Tulare County, California, and lie immediately southwest of Sequoia National Park (see plate 1). Springville lies 4 miles to the southwest and Visalia is 30 miles to the northwest. Access to the study area is provided by California Highway 190, Gulch Park Road and Bear Creek 

Stream-sediment samples

Analyses of the stream-sediment samples represent the chemistry of the rock material eroded from the drainage basin upstream from each sample site. Such information is useful in identifying those basins which contain concentrations of elements that may be related to mineral deposits. 
The stream-sediment samples consisted of active alluvium collected primarily from first-order (unbranched) and second-order (below the junction of two first-order) streams as shown on USGS topographic maps (scale = 1:62,500). Each sample was composited from several localities within an area that may extend as much as 200 ft from the site plotted on the map. 

Heavy-mi neral-concentrate samples

We panned heavy-mineral-concentrate samples from the same active alluvium as the stream-sediment samples. Each bulk sample was passed through a 2.0-mm (10-mesh) screen to remove the coarse material. The sediment passing through the screen was panned until most of the quartz, feldspar, organic material, and clay-sized material was removed. The sample was air dried. 

Sample Preparation

We sieved the stream-sediment samples at the collection site through a 2-mm screen and the minus 2 mm material was retained. The samples were air dried and sieved to minus-80-mesh using stainless steel sieves. The portion of the sediment passing through the sieve was split and a representative fraction was saved for analysis. 
After panning the sediment, we used bromoform to separate and remove the remaining quartz and feldspar from the heavy-mineral concentrate. The heavy minerals (specific gravity >2.8) were separated into three fractions using a large electromagnet (in this case a modified Frantz Isodynamic Separator). The most magnetic material (largely magnetite) was discarded. The second fraction (largely ferromagnesian silicates and iron oxides) was saved for analysis/archival storage. The third fraction (the least magnetic material including nonmagnetic ore and ore related minerals) was hand ground for spectrographic analysis. 
The magnetic separates discussed are the same separates that would be produced by removing the magnetite with a hand magnet and then using a Frantz Isodynamic Separator set at a slope of 15° and a tilt of 10° with a current of 0.1 ampere to remove the ilmenite, and a current of 1.0 ampere to split the remainder of the sample into magnetic and nonmagnetic fractions. 

Sample Analysis


Spectrographic method

We analyzed the stream-sediment and heavy-mineral-concentrate samples for 31 elements using a semiquantitative, direct-current arc emission spectrographic method (Grimes and Marranzino, 1968) (tables Al and A2). Spectrographic results were obtained by visual comparison of spectra derived from the sample against spectra obtained from standards made from pure oxides and carbonates. Standard concentrations are geometrically spaced over any given order of magnitude of concentration as follows: 100, 50, 20, 10, and so forth. Samples whose concentrations are estimated to fall between those .5 
N N N N N N N N N N N N N N N N N N N N N .5 N N N N N N .5 N N .5 N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N
N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N
N N N N N N N N N N N N N N N N N N N N N N N N N 200 N <200 <200 N N N N N N N N N N N N N N N
N N N N N 7.0 1.0 <.5 N N N N 20.0 N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N

Sample

  


TABLE 1 . Limits of determination for the spectrographic analysis of stream sediments, based on a 10-mg sample

 1 
	[The spectrographic limits of determination for heavy-mineral-concentrate
	samples are two reporting units higher than the limits given for
	stream sediments]	
	Elements	Lower determination limit	Upper determination limit
		Percent	
	Iron (Fe)	0.05	20
	Magnesium (Mg)	.02	10
	Calcium (Ca)	.05	20
	Titanium (Ti)	.002	1
		Parts per million	
	Manganese (Mn)	10	5,000
	Silver (Ag)	0.5	5,000
	Arsenic (As)	200	10,000
	Gold (Au)	10	500
	Boron (B)	10	2,000
	Barium (Ba)	20	5,000
	Beryllium (Be)	1	1,000
	Bismuth (Bi)	10	1,000
	Cadmium (Cd)	20	500
	Cobalt (Co)	5	2,000
	Chromium (Cr)	10	5,000
	Copper (Cu)	5	20,000
	Lanthanum (La)	20	1,000
	Molybdenum (Mo)	5	2,000
	Niobium (Mb)	20	2,000
	Nickel (Ni)	5	5,000
	Lead (Pb)	10	20,000
	Antimony (Sb)	100	10,000
	Scandium (Sc)	5	100
	Tin (Sn)	10	1,000
	Strontium (Sr)	100	5,000
	Vanadium (V)	10	10,000
	Tungsten (W)	50	10,000
	Yttrium (Y)	10	2,000
	Zinc (Zn)	200	10,000
	Zirconium (Zr)	10	1,000
	Thorium (Th)	100	2,000

Table A1 -

 A1 -0ata for stream sediment samples from Moses Mountain Wilderness and Dennison Peak Wilderness, California. 



Table Al -

 Al -Data for stream sediment samples from Moses Mountain Wilderness and Dennison Peak Wilderness* California. continued 


																		N																										
	S-BA																																												
	S-B	300	300	500	500	200	300	200	500	300	700	200	300	500	300	30	"00	500	300	300	200	500	300	1 ,000	500	1,000	500	700	500	300	200	300	300	700	300	300	3CO	100	50	200	300	1 ,000	500	200	500
	S-AU																																												
	S-AS																																													N
	S-AG																																												
	S-MN																																												
	S-TIX																																												
	S-CAX																																												
	S-MGX																																												
	S-FEX																																												
	LONGITUDE	118 47 11	118 47 23	118 47 17	118 47 13	1 18 47 3	118 39 14	1 18 38 56	11842 4	11842 7	118 42 41	118 39 11	118 44 34	11841 56	118 47 26	118 41 45		11842 8	11841 32	118 41 33	11841 44	11841 36	118 43 ?3	118 42 23	118 42 41	118 43 29	118 44 44	118 43 30	118 42 56	118 43 36	118 44 15	118 44 39	11? 40 16	1 1 8 44 7	118 44 24	11846 0	118 40 45	11841 56	118 42 44	118 41 33	1 1 8 39 1
	LATITUDE	36 17 57	36 17 56	36 17 52	36 17 45	36 17 21	36 14 32	36 14 22	36 17 59	36 17 30	36 15 27	36 12 10	36 9 37	36 10 41	36 18 32	36 15 50		36 16 3	36 16 50	36 17 14	36 17 40	36 18 10	36 16 45	36 16 47	36 15 55	36 1 5 57	3616 5	361010	36 10 51	36 18 46	36 17 55	36 17 ?0	3616 0	36 10 40	36 18 40	36 1 8 0	36 15 ?1	361651	36 14 50	36 14 10	3614 0
	Sampl e	46	47	48	49	50	51	52	53	54	55	56	57	58	59	60		61	6?	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	81	82	83	84	85

Table A2

 A2 Table A2 Data for heavy-mineral* non-magnetic concentrate samples from Moses Mountain Wilderness and Oennison Peak Data for heavy-mineral/ non-magnetic concentrate samples from Moses Mountain Wilderness and Dennison Peak 


	S-TH	S-BA	200	<100	N	N	N	N	N	1/000	1/000	700	300	1/000	300	303	N	N	1/000	1 /OOO	1/500	700	503	1/000	1/000	700	N	203	533	200	1/500	700	<203	N	500	5/000	303	<233	300	1/000	1/000	N	233	300	<230	200	200
		S-B																																													
		S-AU	1 /oco	>1 /OOO	>1 /OOO	>1 /OOO	>1 /OOO	>1 /OOO /coo >1	>1 /OOO	>1 /OOO	>1 /OOO	>1 /coo	>1 /OOO	>1 /OOO	>1 /OOO	>1 /OOO	>1 /OOO	>1 /OOO	>1 /OOO	>1 /OOO	>1 /OOO	>1 /cco	>1 /OOO	>1 /OOO	>1 /OOO /coo >1	>1 /oco	>1 /OOO	>1 /OOO	>1 /OOO /coo 2	>2 /coo	>2 /coo 500	>2 /OOO /ore 2	>2 /OOO /cco >2	>2 /OOO	>2 /OOO	>2/000	>2 /ooc >2/oro /occ >2	>2 /OOO	>2 /OOO
	S-AS																																													
		S-AG	N	N	2.0	3.0	2.0	2.0																																	
	Wilderness* California. Wi Iderness/ California.--continued	S-MGX S-CAX S-TU S-MN	.30 7.00 1.00 700	2.CC 5.00 >1.00 700	.70 5.00 >1.00 700	.30 3.00 >1.00 700	.30 3.00 >1.00 500	.70 3.00 >1 .DC 700	.70 5.00 >1.00 700	.10 3.00 >1 .00 500	.05 3.00 >1 .00 300	.20 5.00 >1 .00 700	.03 .50 >1.00 200	.03 .50 1.00 100	.05 3.00 >1.00 700	,02 .07 .30 70	.7C 3.00 >1.CO 2CC	1.50 3.00 >1 .00 500	.15 5.CC >1 .00 300	.10 3.00 >1.CO 200	.05 ,2C .02 70	.10 .20 .10 2CC	.05 5.CC >1 .00 200	.L5 2.00 .30 200	.03 2.0C >1 .00 200	.02 .10 .70 100	.10 2.00 >1 .00 300	.5C 3. GO >1.0C 5CO	.3C 3.00 1 .CO 500	.30 5.00 1.00 700	.05 .70 1 .00 100	.20 5.00 >2.0C 500	.10 1.00 1.50 300	.50 1.00 .50 3CO	.05 .50 .20 70	<.C5 2.00 >2.00 100	.3C .20 2.00 200	.70 .70 .50 3CC	<.05 2.00 1.00 150	.05 1.0C 2. 01 200	<.05 2.00 >2.0C 2CO	.05 .10 .70 150	.07 .20 2.00 300	.L7 .10 1.00 1 50	.07 .15 1.CC 2CO	.05 1 .00 2.00 1 50	.1 5 1.50 >2.CC 150
		S-FEX	.50	.50	.30	.53	.5U	.70	2.00	.50	.20	,2J	.50	.13	1 .00	.05	.20	1 .00	.23		.20		.C5	.15	.1L	.23	.50	.10	.70	1 . CC	1 .CO	1 .50	.30	.50	.71	1 .00	.31	.30	1.00	1 .50	.7C	.50	.30	.70	1 .00	1 .5u	1 .00	.5u	.51
	LONGITUDE LONGITUDE	118 39 44	113 39 41	1 18 37 4	118 37 1	118 37 50	11? 37 49	118 38 25	11S 40 8	118 42 23	11344 51	118 46 30	113 47 25	118 47 18	118 48 28	118 36 59	116 3fc 8	116 41 33		1U 41 34	11845 6	118 46 7	113 41 37	118 42 59	1 18 44 10	118 47 40	118 47 2	118 47 23	118 47 17	115 47 13	113 47 3	1 It 42 4	11342 7	118 39 11	11844 34	11541 56	118 47 26	11341 32	118 41 33	11841 44	11841 36	118 43 23	113 42 23	1 U 42 8	118 43 29	11344 44	1 1 {< 43 3D
	LATITUDE LATITUDE	36 18 19 36 36 36 18 3 36 36 14 30 36 36 14 27 36 36 14 1 1 1 1 1 1 C 8 7 7 6 51 46 55 20 C	36 13 57 36 1C 36 36 13 28 36 36 11 27 36 36 1C 11 36 36 11 25 1 1 1 1 8 3 8 5 4C 4C C 35 21	36 17 52 36 36 36 1 3 3 1 1 4 4 5C 1C	36 1 8 7	36 18 28	36 13 24	36 11 59	36 11 39		36 10 59		36 916	36 11 23	36 18 45	36 18 30	36 15 40	36 1 9 7	36 18 18	36 17 56	36 17 52	36 17 45	36 17 21	3617 59	36 17 3C	36 12 10	3c 9 57	36 1 T 41	3c 18 32	36 16 5C	36 17 14	36 17 4C	36 13 10	36 16 45	36 16 47	3616 3	36 15 57	3616 5	M' TJ 11,
	Sample Sample Sample	02 C2 C3 03 C9 09 1C 1C 1 1 1 1 72 73 74 75 76	12 12 13 13 16 16 1 7 1 7 1 9 19 77 76 79 SC 61	21 21 23 23 24 24 25 25 28 23 83 84 S5	3C 3C 31 31 33 33 34 34 35 35	36 38 33 42			44	4?	4 3	4 9	50	53	54	56	57	58	59	t 2	t3	64	65	66	67	68	09	71

Mesozoic paleotectonic reconstruction of the southern Sierra Nevada region, in Mesozoic Paleogeography of the Western United States: Society of Economic Paleontologists and Mineralogists Pacific Section, p. 311-336. Sawlan, M. G., and Ort, K. M., in press, Geologic map of the Moses and Dennison Peak Roadless Areas, Tulare County, California,: U.S. Geological Survey MF Map 1651-C. VanTrump, George, Jr., and Miesch, A. T., 1976, The U.S. Geological Survey RASS-STATPAC system for management and statistical reduction of geochemical data: Computers and Geosciences, v. 3, p. 475-488.
J A Domenico, R J Goldfarb, D L Leach, S M Smaglik