N OT $ S O N PRO S P$ CT I N G T I N - O R $ I N T$ $ F$ D $ RAT $ D M A L A$ S TAT $ S . V B. S CR $ R . NO J I , Geol o is t t h F d t d l a S s fl t g o t e e e ra e M a y ta te Gover m e n . $ UALA LU M PUR : I D T T T . O T $ $ F. M . V M PR N E A S G ERN EN PR ESS . — - 6 1 1 . $ N S CONT T . P R O SP $ C T I NG D ET R I TA L D EP O S ITS I N T$ $ GRAN I T $ $ I LLS I - $ I . P R O SPECT I N G N O N D ET R I TAL D EP O S ITS IN T $ G I T $ $ I 0 0 RAN LLS 0 I I I . P R O SPEC T I N G A LO NG G RAN IT $ MAR G I NS IV M . P R O SPECT I N G A LLU V I AL FLATS AN D A LLU V I U I N T $ $ L I M ESTO N E $ I LLS P R O SPECT I N G D $ T R I TA L D EPO S I TS BELOW T$ $ R EC EN T A LLU V I U M $ A D V I . P R O SPEC T I NG V I NS N P I PES I T I O F P O T I S M S — P O V I . V A LUA N O R SP EC N G A PLE R SPECT I N G REC O R D S L T R T I ONS I L$ S A . — Figu re I . Section show ing th e S t ru c t u re o f th e $ inta Va lley b e fO Pe the Fo rm a tio n o f th e Limestone $ ill s . — - h Figure I I . S ec tio n sho wing Al l u v ial Beds with Pay dirt at t e - Base Lyin g o n Limeston e Bed rock . - i h Figure I I I . S e c t o n show ing th e same Bed s after t e Limeston e - b W Bed rock has bee n attacked y ater . I N T R O D $ CT I O N . The following n ot es on prospecting for tin - o re in the F S ro m te d a rtl w ederated M alay tates have been p p p p y by hat is n o w Obvious to all of us , the approaching exhaustion of easily won o re near the s urface in localities where tran s port is cheap; and partly by the fact that certain prospecting operation s u ndertake n in the last tw o o r three years have been s o . ” l w o f misapp ied , o ing to lack appreciation of the structu re of the w l i w grou nd being dealt ith , as to resu t in noth ng but a aste of Capital and an unfortu n ate impression on the part of tho s e who u ndertook the w ork that the country is n o good . ~ M a y own practical experien ce of . prospecting is not l rge , and I am aware that in addre ssin g these lines to the min ing com mu nity I am attempting to advise many whose practic a l experienc e h a s been spread over a greater n umber o f years than my o w n ; but I t rust that it w il l be recognised that my obj ect i s s not to criticise , but to turn to accou n t Opportun itie of o n e w o ne h c omparing m in ing district ith an other, an d m ine wit t w another, ogether with a certain amoun t of special kno ledge , in ' a n e nd e av o u r to s ave useless expend iture an d in show ing to Som e exten t ho w much value S hou ld be placed o n the re s ult s obtai ned w - u s he n prospecting grou nd for tin ore . M istakes have do btles o been made here in the valuatio n of mining pr p erties , as they have been made in every country possessed of considerable mineral w ealth . I n this country som e such mistakes have resulted from unlooked for peculiarities in the structure o f the groun d o r from the fact that some tin deposits upset calculation s by behaving in a w - w man n er different from ti n deposits elsewhere . I n a ell kn o n $ work t h e follo wing passage occurs M iners w ith fixed ideas resulting from ob s ervatio ns made in a limited area are co u se quently/ liable to m ak e s e rio u s mistakes when they attempt ” to apply their experien ce i n distan t a nd totally n e w localities . ' t I w i The liabili y , as have reason to kn o , is not conf ned to w m an n e w. m in ers ; but hether a be m iner or geologist , in a b u t ‘ re v io u s country he has n othing to guide him p experience , w and rightly or rongly , capital is not kept idle , nor are min e rs w required to ait , while scientists make a protracted an d careful examination Of the groun d to be m ined i n order to g u ard a gainst mistakes . We stil l learn by experience an d comfort ourselves w ith the refl ectio n that he wh o m akes n o mistake s m akes nothing . m , w d These notes hich do n ot preten to be a co plete. r w n t eatme nt of the subj ect , are ritte solely for the mining I d . commu nity in this country , and therefore have refraine from s w Of w . takin g, up pace ith a description the properties by hich s ‘ ” a i ~ 9 . A Treati s e o n Ore D e o si ts Ph illi s an d L ou is . 93 A. p , p , p p , 2 - s tin ore may be recogni ed . I do no t mean that th e re is n othin g to be s aid on the subj ect w orthy of attention : on the contrary tin - o re sometimes occurs i n extraordinary forms that escape recognition even here , and may escape recognition when there ' is n for h s uc l i ss . s o ne n o apparen t reaso e us ven e The ubj ect is , ' however, that Should b e tre ate d at length in order to be of real u s e “ a n d e and e to meet every case that has com under n otice , thes s I p age do not seem to be the place for such an attempt . I f ' m a u w o f w w o n e ' thin k y tter a ord arn ing , ho ever , let n o he . ' k now s a p hrase that o ne hears occasionally among ' - m b s . m o f e t iners , ecau e it is a atter gen ral experience hat ' w s ub ect m a S Of , S hOW S h ho ever simple the j y appear tudy it . t at s a n . C s e m more remain to be le r ed as iterit , as a in eral species , ' d oes n o t attract the . min eral ogist by any characteristics of s especial crystallographic or chemical intere t , but a long experien ce of the mineral as an ore has taught me , that if anyone ‘ s uppose s he has come to an end o f s erviceable k nowl edge ‘ l w . concern in g it , he is like y to find he is rong I n s v the last ection of this paper , on the aluation of ' ' r e s w e a m p osp cting amples , it ill p rhaps appe r to so e that I e n s r advocat a method that errs on the S ide of u n eces a y accu racy . ' is o f in t i s a m l e s f ro m There , course , a limit reat ng p prospectin g r fo r s work beyond Which it is u n necessa y to go practical p urpo e s . Fo r o n instance , it would be u nreason able to in sist results being w o f ' o r tw o orked out to three places decimals , even , in the n s m aj ority of ca s es . But has a ything occurred in thi coun try to S h ow ’ that p rospecting i n t h e past has bee n un nece s sarily accurate $ I was frankly told o n o n e occasion that my method o f “ $ re a rin s am l es the p p g p is not practical , b ut I defe n d it o n gro u nd that the most practical prospecting is the most accurate w w prospecting, ithin the limits indicated above , and that here ' u s te rlin m a w thousands of po nds g y be involved , it is rong to refuse a ne o f w to av il o self simple means that ill elimi nate some , at any o f a w racti rate , the errors th t vitiate hat my critic meant by p ” ' l w N S m .