The National Academies Press

Currently Skimming:

G. The importance of heavy mineral analysis for regional sedimentary petrology
Pages 102-127

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.

From page 102... ... Petr. ~ij Amsterdam' Netherlands Introduction During the last five years nearing all reapers dealing with heavy mineral studies have contained reads about the accuracy of the laboratory methods necessary to obtain comparable results. Read the entire page →
From page 103... ... This loaf to the assumption that changes in ~neralogica1 cocnposi~on were generally Mused by differences ~n grain size and by shortcc~mi$~gs of the laboratory methods used. =ter the e~:amination of hundreds of samples derived trom one source, however, we have found mat deviations in the mineralogical colon sition due to di~e:re:~ces in g;rax~ s~ze and laboratory netbods Jie within narrow baits. Read the entire page →
From page 104... ... In the former case their composition will nof alter towards the ~:'urce a~ in i;he.opposite direction it only =11 change it foreign Interim has been admixed. Operas zones containing; sediments Groin one source are there:f ore ch more reliable for ~orre3.ation af stratigraphim1 units than fllose containing "r=; Read the entire page →
From page 105... ... In studying the distribution of the mineral zones present in the younger Tertiary of last Java all changes In heavy mineral composition whi ch may occur In a sedimentary- basi$~,^11 be found. Read the entire page →
From page 106... ... nuneral zones in the four sections the mineralogical composition of th~ . original materials and the places where they.entered the East Java basin can easily be found: �, ; . Read the entire page →
From page 107... ... Exhibit ~ _ ~ _ . Read the entire page →
From page 108... ... . ~ i, The vertical and horizontal distribution of heavy mineral associations in the :East Java Tertiary is .~i~.t.an ;e;i~:ceptional case.; The same [eaters have been found in every area so far steadied for the heaver Minerals and they are of major importance for the interpretation of heavy mineral data. Read the entire page →
From page 109... ... Many investigators consider these Aviations In mineral composition as a result of.grain size differences eyed ~ the sorting effect of current am wave action. We latter variations, however, Ball under Chance variations", as they remain Ashen narrow fits. Read the entire page →
From page 110... ... I) for heavy minerals, we so try to find tile minemlogi Cal composition of the materials originally supplied to tibias basin. Read the entire page →
From page 111... ... When we compare this list of associations with that of the assoc~atio~ actually present In the Tertiary of East Java (pp. Read the entire page →
From page 112... ... The definitions given abme are also applicable to sedimentary Metrological investigations of recant continental and marine sediments ana have Ready been used by Ede~rmn and Bask (11~5 Ed 2~. In these investigations we always Bind the sedimentary petrological provinces side by sidle. Read the entire page →
From page 113... ... FXhib~ t G _ -- 113 - 7 . Si erring tI:ro~gh 30-mesh. Read the entire page →
From page 114... ... Re7. Sieving, The and traction used for heavy mineral studies is li~ted between 0~50 (30~mesh) Read the entire page →
From page 115... ... There is Core chance of touched a Arch grain than a mailer one. The percentage obtained is Ire in accordance With Volume or weights Counting all graJu.s in ons field, large and mall grains are of the Due importance. Read the entire page →
From page 116... ... -- 1:L6 -F5chibit G variation in mineral percentages when only loo non-opaque grains are counted (e~ren alterr~tely by two investigators) always rains within narrow limits and within the natural variations in the sediments thyselves. Read the entire page →
From page 117... ... Tho most convenient way to compare sodimer~ts ~s based on vari ations of the percontagos of those non-opaque minerals who ch ago not soluble in warm HOl and H~Q, so that every type of sediment can be compared. The3perc~tage of this group of minerals shout d therefore always be given in reports on hover mineral studies. Read the entire page →
From page 118... ... . The aim of this paper is to show that the doubt still existing in the minds of may sedimentary petrologists concerning laboratory method and interpretation of heavy mineral work is not justified. Read the entire page →
From page 119... ... 10. Heavy mineral studies should always be made first on a regional scale. Read the entire page →
From page 120... ... . Accuracy in percentage represen~on of heavy mineral frequencies, Proc. Read the entire page →
From page 121... ... Ges ., E.2, 1936-lg38. The size distribution of heavy minerals within a i~aterla~d sandstone, J Read the entire page →
From page 122... ... I , ~ � I ~H' 0 20 40 60 ~100 ~ SECTION 1T to ~5 or 2p ~G1 \ ~ \ 24 \ ~ . z7 \ OF \~ ~ 1 32 1 Z2 1 / 33 3� / /H ~ > I G -- F .,, , ~ TV -~2 G2 PALAEONTOLOGICAL ZONE 5 -Upper half FIGURE I Read the entire page →
From page 123... ... I , ~ � I ~H' 0 20 40 60 ~100 ~ SECTION 1T to ~5 or 2p ~G1 \ ~ \ 24 \ ~ . z7 \ OF \~ ~ 1 32 1 Z2 1 / 33 3� / /H ~ > I G -- F .,, , ~ TV -~2 G2 PALAEONTOLOGICAL ZONE 5 -Upper half FIGURE I Read the entire page →
From page 124... ... I , ~ � I ~H' 0 20 40 60 ~100 ~ SECTION 1T to ~5 or 2p ~G1 \ ~ \ 24 \ ~ . z7 \ OF \~ ~ 1 32 1 Z2 1 / 33 3� / /H ~ > I G -- F .,, , ~ TV -~2 G2 PALAEONTOLOGICAL ZONE 5 -Upper half FIGURE I Read the entire page →
From page 125... ... I , ~ � I ~H' 0 20 40 60 ~100 ~ SECTION 1T to ~5 or 2p ~G1 \ ~ \ 24 \ ~ . z7 \ OF \~ ~ 1 32 1 Z2 1 / 33 3� / /H ~ > I G -- F .,, , ~ TV -~2 G2 PALAEONTOLOGICAL ZONE 5 -Upper half FIGURE I Read the entire page →
From page 126... ... I , ~ � I ~H' 0 20 40 60 ~100 ~ SECTION 1T to ~5 or 2p ~G1 \ ~ \ 24 \ ~ . z7 \ OF \~ ~ 1 32 1 Z2 1 / 33 3� / /H ~ > I G -- F .,, , ~ TV -~2 G2 PALAEONTOLOGICAL ZONE 5 -Upper half FIGURE I Read the entire page →
From page 127... ... l l Lower half FIGURE 1 Read the entire page →

From page 102...

... Petr. ~ij Amsterdam' Netherlands Introduction During the last five years nearing all reapers dealing with heavy mineral studies have contained reads about the accuracy of the laboratory methods necessary to obtain comparable results.

G. The importance of heavy mineral analysis for regional sedimentary petrology Pages 102-127

G. The importance of heavy mineral analysis for regional sedimentary petrology
Pages 102-127