Spectrographic and chemical analyses of drill core from Precambrian igneous rocks of the St. Francois igneous province in southeast Missouri

1978 ◽  
Author(s):  
J.G. Viets ◽  
E.L. Mosier ◽  
E.B. Kisvarsanyi ◽  
S.K. McDanal
Keyword(s):  
Igneous Rocks ◽  
Drill Core ◽  
Chemical Analyses ◽  
Igneous Province ◽  
Southeast Missouri

Energy-Dispersive XRF Analysis of Intact Salt Drill Cores

1984 ◽  
Vol 28 ◽  
pp. 189-194
Author(s):  
R. J. Arthur ◽  
J. C. Laul ◽  
N. Hubbard
Keyword(s):  
Laboratory Analysis ◽  
Energy Dispersive ◽  
Drill Core ◽  
Chemical Analyses ◽  
Chemical Profile ◽  
Xrf Analysis ◽  
The Core ◽  
Drill Cores

Several kilometers of drill core are sometimes obtained when the geology of a particular area is explored. The cores are visually inspected and a limited number of samples are taken for laboratory analysis. Accurate chemical analyses are usually performed on only a small number of core sections because of the expense involved. A chemical profile along the core may provide useful information not available by any other means. This information may be of primary value for geological investigations or it may provide an additional basis for selecting samples for detailed laboratory analyses.

Sur la composition chimique moyenne des amphibolites

1953 ◽  
Vol S6-III (1-3) ◽  
pp. 153-173 ◽  
Author(s):  
Pierre Lapadu-Hargues
Keyword(s):  
Chemical Composition ◽  
Sedimentary Rocks ◽  
Point Of View ◽  
Igneous Rocks ◽  
Chemical Analyses ◽  
Average Chemical Composition ◽  
Composition Chimique

Abstract In a majority of cases, amphibolites derived from sedimentary rocks can be distinguished from those derived from dioritic or gabbroic igneous rocks on the basis of average chemical composition. From the purely chemical point of view, it is possible to consider that eclogites result from metamorphism of certain types of heteromorphic gabbros such as the ariegites,and ultimately give rise to amphibolitic rocks. Chemical analyses are included.

Of the American Quantitative Igneous Rock Classification: Part 5

2012 ◽  
Vol 31 (1) ◽  
pp. 1-41 ◽  
Author(s):  
Davis Young
Keyword(s):  
Igneous Rock ◽  
Essential Elements ◽  
Igneous Rocks ◽  
Single Individual ◽  
Chemical Analyses ◽  
Rock Classification ◽  
Natural Classification ◽  
Quantitative Classification ◽  
The Creation

The preference of the authors of the quantitative igneous rock classification for an artificial rather than a natural system, coupled with their invention of a new nomenclature to accompany the classification, indicates that some essential elements of scientific work are not empirically ascertained but are proposed and accepted (or rejected) by the relevant scientific community as a matter of free choice. The use of igneous rocks as exemplars in the education of novice geology students is discussed. It is claimed that the CIPW classification could not have been produced by a single individual geologist. The factors that allowed for the collective success in the creation of the quantitative classification are examined.Upon publication of their monumental quantitative chemico-mineralogical classification (CIPW 1902, 1903), C. W. Cross, J. P. Iddings, L. V. Pirsson, and H. S. Washington immediately received numerous letters of congratulation. Initial published reviews ranged from highly supportive to suspicious. To help buttress their classification, Washington (1903) published a compilation of igneous rock chemical analyses and Iddings (1903) published several diagrams to drive home the point that a natural classification of igneous rocks was not feasible. Led by Washington, Pirsson, and Cross, several geologists began using the CIPW classification in their petrological studies and some contributed new sub-rang names. In the meantime, Iddings worked on the first volume of a projected two-volume work on igneous rocks based on the quantitative CIPW scheme. Unsympathetic to artificial, overly precise classifications, Harker in particular rejected the CIPW system and its norm calculations and European geologists generally were unenthusiastic. Cross (1910b) offered a major rebuttal to the criticisms, particularly those of Harker, in which he challenged the likelihood of producing a valid natural classification of igneous rocks. Iddings (1913) published the second volume on igneous rocks in which he developed an elaborate correlation between the old qualitative system and the new quantitative CIPW scheme. Washington and Pirsson produced many more petrological studies of Mediterranean volcanic rocks, New Hampshire, and Hawaii that incorporated the quantitative system. Washington (1917) produced a vastly expanded compilation of chemical analyses arranged in accord with the CIPW system. Criticisms, however, continued to mount from Fermor, Daly, Shand, and others, while Tyrrell and Johannsen were lukewarm toward the new classification. The criticism that the CIPW system was of little value in fieldwork repeatedly surfaced. Dissatisfaction with the quantitative scheme led to the publication of many new classifications by geologists, such as Hatch, Winchell, Lincoln, Shand, Holmes, Johannsen, and Niggli. With the creation of satisfactory quantitative mineralogical classifications, the increasing ability to determine the proportions of minerals quantitatively, and the death of Iddings and Pirsson, enthusiasm for the CIPW system gradually began to wane. By the 1960s the classification had become a thing of the past. The value of the norm calculation, however, gained recognition and has survived to the present, assisted no doubt by the capability for doing the necessary calculations by computer.

scholarly journals The summation of chemical analyses of igneous rocks

1916 ◽  
Vol s4-41 (243) ◽  
pp. 257-275 ◽  
Author(s):  
H. H. Robinson
Keyword(s):  
Igneous Rocks ◽  
Chemical Analyses

The petrology of the basic and intermediate rocks of upper Swat, Pakistan

1973 ◽  
Vol 110 (3) ◽  
pp. 285-300 ◽  
Author(s):  
M. Qasim Jan ◽  
D. R. C. Kempe
Keyword(s):  
Volcanic Rocks ◽  
Age Determination ◽  
Tholeiitic Basalt ◽  
Amphibolite Facies ◽  
Igneous Rocks ◽  
Basalt Magma ◽  
Chemical Analyses

SummaryA series of metamorphosed (amphibolite facies) basic and intermediate igneous rocks from upper Swat, Pakistan, is described, with seven chemical analyses. The rocks intrude ?Palaeozoic metasediments and are partially bordered by other, later, intrusive and volcanic rocks. The group, now represented by, from S–N, epidote amphibolites, amphibolites, noritic and hypersthene gabbros, and quartz diorites, is considered to be derived from a series of plagioclase hypersthenites, norites, hypersthene gabbros, and hypersthene diorites. Variation diagrams are used to show that the series forms a differentiated sequence; FMA and lime-alkali diagrams suggest that it is similar to the rocks of the Garabal Hill–Loch Fyne area of Scotland. Some of the mineralogy of the group is briefly discussed, with five chemical analyses. A K/Ar age determination gives 67 Ma; thus the rocks probably derive from an early Himalayan (Alpine) tholeiitic basalt magma.

scholarly journals Chemical Analyses of Igneous and Metamorphic Rocks of Denmark, the Faeroes and Greenland. (To and including 1940)

1942 ◽  
Vol 68 ◽  
pp. 1-105
Author(s):  
Sole Munck ◽  
Arne Noe-Nygaard
Keyword(s):  
Comparative Study ◽  
Igneous Rocks ◽  
Geological Survey ◽  
Metamorphic Rocks ◽  
Chemical Analyses ◽  
The Past ◽  
De Quervain ◽  
Set Up ◽  
The Comparative Study

The past ten years or so have seen the publication of collections of chemical rock analyses which, as a result of their clear form of set-up, in many ways faciliate the comparative study of the chemistry of the rocks and their mutual relationships. Among these publications there are: P. Niggli, F. De Quervain & R. U. Wintherthalter: Chemismus schweizerischer Gesteine. Bern 1930, and the analyses publish ed by the Geological Survey of Great Brita in: Chemical Analyses of Igneous Rocks, Metamorphic Rocks and Minerals. London 1931. Similar publications are available from two neighbouring countries, i.e. from Sweden: W. Larsson: Chemical Analyses of Swedish Rocks (Bull. Geol. Inst., Uppsala 1932) and from Finland : L. Lokka: Neuere Chemische Analysen von Finnisch en Gesteinen (Bull. Comm. Geol. de Finlande No. 105. Helsingfors 1934).

A preliminary study of methane inclusions in alkaline igneous rocks of the Kola igneous province, Russia: implications for the origin of methane in igneous rocks

1998 ◽  
Vol 10 (6) ◽  
pp. 1167-1180 ◽  
Author(s):  
Joanna Potter ◽  
Andrew H. Rankin ◽  
Peter J. Treloar ◽  
Valentin A. Nivin ◽  
Wupao Ting ◽  
...  
Keyword(s):  
Igneous Rocks ◽  
Igneous Province ◽  
Preliminary Study
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