Document 7O3MgYrerbxrNaZE8OZpGRvJ8

FILE NAME: Johnson & Johnson (JAJ) DATE: 1961 June 6 DOC#: JAJ036 DOCUMENT DESCRIPTION: Letter to J&J from Battele Memorial Institute with Evaluation / t Battelle Memorial Institute SOS KINS A. V E N D ! COLUMBUS I, O H I O August 25, 1961 Mr* W. H . Ashton Research Department Je n s o n snd Johnson Nsw Brunsw ick, Nsw Je rse y Dsar Mr. Ashtont The fo llo w in g co n stitu te s an evalu atio n o f th e exp lo ratio n work dons t o d ate on the Hansnondeville t a le d e p o sit. Su rface h oles 1 , 2 , 3 , and 4 in d ica te the probable reserves o f t a le to be in excess o f o n e -h a lf m illio n tone o f o re , and th e p o ssib le reserves to be g r e a te r . The cores from h o les 1 and 2 were examined and discu ssed w ith M r. P . B le s a r . They show th e fo llo w in gt Hols l , fe e t Hole 2 , fe e t Overburden Sch ist T alc "C in d e r " T alc S c h ia t 0 - 14 14-104 104-130 120-125 125-137 127-150 0- 2 3-165 165-169 169-179 179-200 200-212 Tha t s lo body appears to th in down-dip from th e m ine. The t a lc from hole 1 i s s lig h t ly darker than current production due to more abundant opaques and greenish gangue components. However* the t a lc is su p erior to the o f f co lo r "u n sa tisfa cto ry " ore p revio u sly obtained from th e corresponding part o f tha m ine. The major se ctio n o f ore from hole 2 i s about cu rren t gra d e . Ore from th ese th in n er p a rts o f th e ore body w ill n e c e ssa rily have a higher percentage o f d ilu tio n by w all rook and border phase ore than th at from the th ick e r p arts o f th e ore body, unlees the ore is s e le c tiv e ly mined. ing > Tha d r illin g o f hole 3 was observed. The core showed the fo llo w D E D IC A T E D TO THE A D V A N C E M Protected 0 ocum en t-6ub ji to ft'o t.cN v e O fd ' 23 JNJMXM_OOCOCH)7M B a tte lle M em orial Institute Mr. w. h. Asnton -z - August 25, 1961 Hols 3 , fast Overburden Schist Talc (only 2' recovered) Schist 0 - 18 18-245 245-249 249------ The ore pinches in hole 3 in a position roughly down-dip from a sim ilar pinching in the mine. Whether th is thinning represents a continuation o f that con striction o f the ore seen in the mine or a pinching-out down-dip, would have to be determined by further exploration. The ore from the center part of the ta lc section is of good grade; however, due to the poor recovery a composite sample shows a disproportionately high mica and amphibole contamination. Hole 4 was selected during my recent v i s i t . The resu lts of the d r illin g were reported to me by Mr* V. B ackels, ad follow s: t a lc from 147 to 193 f a s t , and from 203 to 265 fe e t, none to bottom at 273 f e e t . This is a t o t a l of 108 fee t of ta lc * Eastern Magnesia w ill send to me specimens from the upper and lower ta lc zones for petrographic examination. The two zones were reported to have minor tex tu ral d iffe re n ce s. The ore i s reported to be high-grade white t a l c . Whether or not the platy char acter of the ore has been maintained in the thickened body is yet to be determined. Generally speaking, the mineral purity and whiteness would be expected to be maintained or improved along the apparent strik e o f the ore toward the thicker se c tio n , and possibly to decrease down-dip from the mine* The character of the ore at the present heading and in hole 4 is o f greater sign ifican ce to the mineral nature of the depoeit as a whole than is the character o f the ore in holes 1, 2 , and 3 . A c r it ic a l fact is whether or not the platy character of the t a lc is maintained throughout the greatly thickened section o f the ore body. S p e cific d ifferen ces between the ore in the f i r s t three holes are not s ig n ific a n t since proper sampling of the cores w ill not be possible u n til they are s p l i t , crushed, and composites are made for experimental work. Grain counts of the ty p ica l ore in cores 1, 2 , and 3 showed the following range of compositioni Platy ta lc Nonplaty t a l c Carbonates Altered amphiboles Opaques (including pyrite) Chloritizsd silicates Micas Quartz, feldspar R u tile , flu o r ite , zirco n, magnetite 60-65$ 1-4 30-35 tr-1 tr->2 <1->1 tr-1 tr 0 Ofce from hole 4 has not yet been examined. Protected Docum ent-Subject to Protective Order JNJMX68_000000759 B a ttelle M em orial Institute M r. W. H . Ashton August 25, 1961 A sample o f selecte d t a lc ore was high-graded from the p ile near the ro ad sid e. T his sample represents current ore w ithout w all rock d ilu tio n and should correspond t o s e le c tiv e ly mined o re . The previous sample which was sen t to Denver contained abundant ganglia, more c lo s e ly represent in g r u n -o f- mine o re . The new sample was taken fo r comparative purposes, fo r p o ssib le work by Denver Equipment and Mr. P erk in s. I have recommended t o Mr. W. Magnus th a t Mr. Perkins repeat h is i n i t i a l b e n e flo ta tio n procedure ( in which he obtained a product w ith a b rightn ess o f 84) on th is newly obtained se le cte d a r e . The new sample o f ore w ill a lso g iv e Denver a chance t o show what they can do w ith s e le c tiv e ly mined o re . The cry sta llo g ra p h ic h a b it o f th e t a lc in h o ls 4 and subsequent holes has y e t t o be determ ined. I f the ore is uniform , the m atter o f re serves is no longer a problem. Inasmuch as the mine was flooded during my la s t v i s i t to H anm cndsville, i t was im possible t o sample the ore fo r r u tile or to sample the current heading and s h a ft , as had been proposed. I t is ad visable th a t I taka care o f these d e ta ils vdien I go to Vermont to study th e subsequent co re s, the composite sam ple, and the flo ta tio n p rod ucts. A primary rem aining problem is improving the co lo r o f the flo ta tio n product. Very tr u ly you rs, WLStlb Hn. L . Smith Prin cipal G eo lo gist Protected Document-Subject to Protective Order JNJMXS8J9000007M P .S . I w ill be away from Columbus from September 1 through September 9 . I have kept a week free in September fo r 'th e North Carolin a inves t ig a t io n , and have te n ta tiv e ly figured on a week in October fo r Vermont. Except fo r September 1 to 9 , my schedule is reasonably fle x ib le . Protected Docum ent-Subject to Protective Order JN JM XSe_000l0761