70 



California Division of Mines and Geology 



Bull 197 



Table 14. Chemical Analysis of Palmtag — Harris Deposits, San Benito County 



Sample 



Fe 



S1O2 



AI2O3 



CaO 



MgO 



Mn 



RsP3 



Loss 



VINEYARD SCHOOL DEPOSIT 



F-H-1 0.17% 



F-H-2 0.35 



F-H-3 0.40 



F-H-4 0.20 



F-H-5 0.30 



F-H-6 0.20 



F-H-7 0.10 



F-H-8 0.15 



F-H-9 0.10 



F-H-10 0.20 



HAYFIELD DEPOSIT 



FesOi & 



Sample S1O2 AI2O3 



HF 1 4.67% 0.70% 



HF 2 2.28 1.00 



HF 3 2.81 0.47 



HF 4 2.00 0.47 



HF 5 0.92 0.14 



HF 6 1.38 0.21 



HFA 1 3.80 1.30 



HFA 2 1,10 0.60 



HFA 3 1,30 0.40 



HFA 4 0.60 0.30 



HFA 5 2.70 1.20 



HFA 6 1.80 0.80 



HFA 7 1.00 0.50 



HFA 8 2.30 1.10 



HFA 9 2.30 0.90 



HFA 10 2.50 0.80 



HIGHTOP DEPOSIT * 



HT 1 16.62 3.60 



HT 2 10.15 1.50 



HT 3 7.25 2.00 



HT 4 22.55 3.20 



HT 5 18.25 4.00 



HT 6 10.80 2.55 



HT 7 11.25 2.30 



HT 8 8.60 1.65 



HT 9 4 50 1.10 



HT 10 17.00 2.63 



HT 11 32.20 5.01 



HT 12 16.25 4.20 



HT 13 14.25 3.70 



HT 14 14.95 3,15 



CaO 



MgO 



53.70% 



51.25 



51.50 



54.55 



55.45 



55.00 



48.16 

 54.44 

 54.78 

 54.00 

 52.86 

 53.48 

 54.54 

 49.23 

 53.45 

 53.74 



43.50 

 48.60 

 49.30 

 41.00 

 42.15 

 47.55 

 47.50 

 55.75 

 51.30 

 +4.40 

 33.50 

 42.80 

 45.15 

 45.10 



0,34% 



1.20 



0.31 



0.32 



0.30 



0.28 



3.70 

 0..50 

 0.40 

 0.90 

 0.50 

 0.36 

 0.30 

 3.00 

 0.36 

 0.30 



0.21 

 0.54 

 0.46 

 0.19 

 0.93 

 0.61 

 0.54 

 0.37 

 1.26 

 0.61 

 0.68 

 0.79 

 0.47 

 0.57 



■ Samples collected from resislant ledge at west end of deposit, analyzed by 

 US. Steel 

 •• Samples collected from prospect cuts, analyzed by Howard Harris, owner. 



pected by means of several cuts and are shown to be 

 500 feet long and less than 100 feet wide. The lime- 

 stone is typically blue gray, medium to coarse crystal- 

 line, and highly brecciated. Analyses of 16 chip sam- 

 ples (HF and HFA series in table 14), taken at .SO-foot 

 intervals along the strike of the prospect, show the 

 limestone to be of general good quality. The prospect 

 appears to be too small to be of significant economic 

 interest. 



Other reference: Bradley and Logon, 1919, p. 635. 



Porter deposit. Location: W'/j sec. 7, T. 14 S., R. 4 

 E. (pro).), M.D., \% miles east of Natividad; Salinas 

 l.'i-minute quadrangle. Ownership: James Porter, 701 

 Old Stage Road, Salinas (19.';9). 



An undeveloped dolomite deposit I'/j miles east of 

 Natividad was described by Bowen and Gray (19.59, 

 p. 28) as roughly 300 feet wide and 3,000 feet long, 

 with an eastward elongation and nearly vertical dip. 

 Granitic intrusions penetrate the mass in many places. 

 Most of the rock is white, medium-crystalline dolo- 

 mite similar to that in the Natividad (Kaiser) depos- 

 its. Three channel samples cut perpendicular to the 

 strike probably reflect the chemistry of the deposit. 



The deposit was later mapped in detail by Bowen 

 (1968, unpublished map) and shown to consist of 

 mixed dolomite and limestone. Bowen also mapped 

 three other fairly large bodies of mixed limestone and 

 dolomite within half a mile to the north and west (see 

 plate 2). 



Power Line deposits. Location: SW'/ sec. 4, SE'/i 

 sec. S, E'/ sec. 7, and sec. 8, T. 14 S., R. 5 E. (proj.), 

 7/2 to 9 miles south-southwest of Hollister; Gonzales 

 l.')-minute quadrangle. Ownership: Dr. Rollin Reeves, 

 Salinas (part of mineral rights to Ideal Cement Com- 

 pany?) (1964). 



The Power Line deposits, referred to by Bowen and 

 Gray (19.')9, p. 32), extend southwest from SW'X sec. 

 4 to E'/, sec. 7. They were named for the power line 

 that crosses the northern portion of the deposit group. 

 The deposits are situated on the ridges and rolling 

 upland surfaces that divide the three drainages of Pes- 

 cadero. Bird, and Swamp Creeks. Brief examination of 

 the deposits by Bowen and Hart in February 1964 

 indicated that none of the carbonate masses are large 

 and that some of the limestone is impure. The largest 

 mass seen was about 1,000 feet by 700 feet in plan and 

 was exposed over 200 feet in relief. Much of the lime- 



