Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage: revision of Turner method
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
New York, NY
1962
|
| Schriftenreihe: | Geological Society of America: Special paper
69 : Procedures and techniques |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | VIII, 64 S. graph. Darst. |
Internformat
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| 100 | 1 | |a Slemmons, David B. |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage |b revision of Turner method |c David B. Slemmons |
| 264 | 1 | |a New York, NY |c 1962 | |
| 300 | |a VIII, 64 S. |b graph. Darst. | ||
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| 337 | |b n |2 rdamedia | ||
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| 490 | 1 | |a Geological Society of America: Special paper |v 69 : Procedures and techniques | |
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Datensatz im Suchindex
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|---|---|
| adam_text | Titel: Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage
Autor: Slemmons, David B
Jahr: 1962
Contents
Abstract.............................................................. i
Introduction.......................................................... 3
Objectives, 3
Terminology, 3
Other comments, 4
Measurement procedure................................................ 5
Projection procedure................................................... 8
Determination of twinning law and composition of feldspar from the plotted
data............................................................. 9
General, 9
Normal, parallel, and complex twinning, 10
Detailed procedure for determining the twin law, 10
(1) Location of composition planes and cleavages, 10
(2) Locating the twin axes, 12
(3) Measurement of angles to twin axes, 13
(4) Determination of normal twins, 13
(5) Determination of parallel and complex twins, 14
(6) Example, 16
General recommendations for avoiding ambiguity.......................... 19
Ambiguous cases..................................................... 20
General statement, 20
(1) Ambiguity due to plutonic, transitional, and volcanic plagioclase optics, 20
(2) Ambiguous cases with normal twinning, 21
(3) Ambiguous identity of the twinning axis in parallel and complex twins, 22
(4) Ambiguity as to composition in parallel and complex twins, 24
(5) Special cases of ambiguity where X, Y, or Z is parallel to a twinning axis, 24
(6) Special cases of ambiguity where X, Y, or Z is perpendicular to a twinning
axis, 24
Determination of zoned crystals and microlites............................. 31
Departures from standard curves......................................... 32
Selection of source data................................................. 33
References cited.......................................................35
Index................................................................63
ILLUSTRATIONS
Figures
1. Plagioclase twinned on altóte (1-2) and Carlsbad (2-3) laws, with a second set
of twinning and cleavage showing in one subindividual (3).............. 8
2. Equal-area projection (lower hemisphere) of optical and crystallographic data
for plagioclase individuals (1), (2), and (3) of Figure 1.................. 15
3. Case J-i, an equal-area projection for oligoclase, An«, twinned with [oh] =
TA or X[ooi]/(oio) = TA as alternative twinning axes. CP = (010)..... 25
4- Case K-i, an equal-area projection for oligoclase-andesine, An30, twinned with
X(ooi) = TA or [010] = TA as alternative twinning axes. CPi_2 = com-
position plane (001)............................................... 27
5. Case L.-I, ideal case of Carlsbad twinning, TA =[ooi]andCP = (010),to give
coincidence of optic axes (a, a ) in both subindividuals (cf. Ansä).......... 29
Plates
1. Relation of the angle between the Z optical direction of each of the subindi-
viduals and the normal to the composition plane (ZAXCP) and the an-
orthite percentage................................................ 39
2. Twinning-axis curves for the albite twin law: CP = (010); TA = X(oio)... 41
3. Twinning-axis curves for the Manebach twin law: CP = (001); TA =
±(001)....................................................... 43
4. Twinning-axis curves for the Baveno-left twin law: CP = (021); TA =
X(o2i) and the Baveno-right twin law: CP = (021); TA = X(o2i).....45
5. Twinning-axis curves for the Carlsbad twin law: CP = (010); TA = [001] . 47
6. Twinning-axis curves for the albite-Carlsbad twin law: CP = (010); TA
= _L[ooi]/(oio).................................................. 49
7. Twinning-axis curves for the Ala A twin law: CP = (001); TA = [100], the
Ala B twin law: CP = (010); TA = [100], and the Manebach-acline
twin law: CP = (001); TA = X[oio]/(ooi)......................... 51
8. Twinning-axis curves for the albite-Ala B twin law: CP = (010); TA =
X[ioo]/(oio).................................................... 53
9. (A) Curves for angles between X and Y and the _1_CP (not the TA) for the
rhombic section (for the pericline twin law): CP = R. S.; TA = [010].
(B) Twinning-axis curves for the pericline twin law: CP = R. S.; TA =
[010], acline twin law: CP = (001); TA = [010], and Manebach-Ala
twin law: CP = (001); TA = x[ioo]/(ooi)........................ 55
10. Case III: relationship between ZAXCP and TA A X2CP for certain
pericline twins where CP = (010) and TA = X[ioo]/(oio), [001],
X[ooi]/(oxo), or [100], and the second composition plane is the rhombic
section (X2CP = XR. S.)........................................ 57
11. 2V for high-temperature and plutonic plagioclase..................... 59
12. Birefringence and refractive indices of high-temperature and plutonic
plagio clase and plagioclase glass.................................. 61
i
Tables
1. Twin laws for plagioclase....................................................x j
2. Data for identifying the twinning axis in parallel or complex twins consisting of
subindividuals (1) and (2)......................................... ^
3. Position of optical directions (in degrees), X, Y, and Z, relative to the main
crystallographic directions............................................„„
|
| any_adam_object | 1 |
| author | Slemmons, David B. |
| author_facet | Slemmons, David B. |
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| ctrlnum | (OCoLC)404778 (DE-599)BVBBV013306593 |
| dewey-full | 549.68 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 549 - Mineralogy |
| dewey-raw | 549.68 |
| dewey-search | 549.68 |
| dewey-sort | 3549.68 |
| dewey-tens | 540 - Chemistry and allied sciences |
| discipline | Chemie / Pharmazie |
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| id | DE-604.BV013306593 |
| illustrated | Illustrated |
| indexdate | 2024-07-09T18:43:29Z |
| institution | BVB |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-009072468 |
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| physical | VIII, 64 S. graph. Darst. |
| psigel | TUB-nb |
| publishDate | 1962 |
| publishDateSearch | 1962 |
| publishDateSort | 1962 |
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| series | Geological Society of America: Special paper |
| series2 | Geological Society of America: Special paper |
| spelling | Slemmons, David B. Verfasser aut Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage revision of Turner method David B. Slemmons New York, NY 1962 VIII, 64 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Geological Society of America: Special paper 69 : Procedures and techniques Feldspaths ram Feldspar Geological Society of America: Special paper 69 : Procedures and techniques (DE-604)BV036810616 69 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=009072468&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Slemmons, David B. Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage revision of Turner method Geological Society of America: Special paper Feldspaths ram Feldspar |
| title | Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage revision of Turner method |
| title_auth | Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage revision of Turner method |
| title_exact_search | Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage revision of Turner method |
| title_full | Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage revision of Turner method David B. Slemmons |
| title_fullStr | Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage revision of Turner method David B. Slemmons |
| title_full_unstemmed | Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage revision of Turner method David B. Slemmons |
| title_short | Determination of volcanic and plutonic plagioclases using a three- or four-axis universal stage |
| title_sort | determination of volcanic and plutonic plagioclases using a three or four axis universal stage revision of turner method |
| title_sub | revision of Turner method |
| topic | Feldspaths ram Feldspar |
| topic_facet | Feldspaths Feldspar |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=009072468&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV036810616 |
| work_keys_str_mv | AT slemmonsdavidb determinationofvolcanicandplutonicplagioclasesusingathreeorfouraxisuniversalstagerevisionofturnermethod |