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Page 1 GEL 3050 - Mineralogy & Optical Mineralogy Calumet Mine Field Notebook Assignment The Calumet Mine is an old iron mine near Salida, Colorado. Your assignment is to do a handwritten field notebook observation recording and to properly collect samples in the field. You will turn in your field notes IMMEDIATELY after the trip for grading. Assignment Outline: Geologists keep meticulous field notebooks in which recordings and observations are noted. These notebooks become a permanent record of a geologists field activities. They are hand written and need to be legible enough for a colleague to continue the project and use your recorded data. During this project you will spend several hours at the destination recording your observations in detail. Your rock mineral toolkit should be your companion since you also will need to identify present minerals. In addition, you also will use proper procedures to collect mineral samples and bring them back to the lab. Assignment: You are to describe in detail the occurrence of 4 minerals found at the mine in your own handwriting and with appropriate sketching. Each mineral description is worth 20pts PLUS a geologic setting overview worth 20pts for a total of 100pts. The following table gives you an overview of what should be included in your description for each of the four minerals. Mineral sketch with scale (4 x 5pts) Physical Properties (4 x 3pts): Color Cleavage Hardness Specific Gravity Crystallography (4 x 3pts): Size Transparency Form Crystal Class Mineral Associations (4 x 9pts): Contact / boundaries with other minerals Xenoliths Connections / Exclusions Geologic Setting Overview (20pts): Formation / Rock Matrix Observable Diagenesis Outcrop description & Outcrop Size Location Sample points Students often ask “What does “A” work look like? Do you have an example?” Below are two “A” examples of expected field note entries: Good Notebook Entry Example: GEOLOGIC SETTING OVERVIEW w/ sketch - 2 Notebook Pages: This example shows example what a “good” Geologic Setting Overview should look like. Includes date & page numbers, externally given objectives and lecture (or handout) details, weather observation to recall circumstances at a later date or to indicate possible assessment difficulties, a good location detail, detailed description of outcrop with mineral overview, sizes and mineral association outline, and a sketch of the outcrop with scale and sample locations.

Transcript of Page 1 GEL 3050 - Mineralogy & Optical Mineralogy Calumet...

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GEL 3050 - Mineralogy & Optical Mineralogy Calumet Mine Field Notebook Assignment

The Calumet Mine is an old iron mine near Salida, Colorado. Your assignment is to do a handwritten field notebook observationrecording and to properly collect samples in the field. You will turn in your field notes IMMEDIATELY after the trip for grading.

Assignment Outline:Geologists keep meticulous field notebooks in which recordings and observations are noted. These notebooks become apermanent record of a geologists field activities. They are hand written and need to be legible enough for a colleague tocontinue the project and use your recorded data. During this project you will spend several hours at the destination recordingyour observations in detail. Your rock mineral toolkit should be your companion since you also will need to identify presentminerals. In addition, you also will use proper procedures to collect mineral samples and bring them back to the lab.

Assignment:You are to describe in detail the occurrence of 4 minerals found at the mine in your own handwriting and with appropriatesketching. Each mineral description is worth 20pts PLUS a geologic setting overview worth 20pts for a total of 100pts. Thefollowing table gives you an overview of what should be included in your description for each of the four minerals.

Mineral sketch with scale (4 x 5pts) Physical Properties (4 x 3pts):• Color• Cleavage• Hardness• Specific Gravity

Crystallography (4 x 3pts):• Size• Transparency• Form• Crystal Class

Mineral Associations (4 x 9pts):• Contact / boundaries with other

minerals• Xenoliths• Connections / Exclusions

Geologic Setting Overview (20pts):• Formation / Rock Matrix• Observable Diagenesis• Outcrop description & Outcrop Size• Location• Sample points

Students often ask “What does “A” work look like? Do you have an example?” Below are two “A” examples of expected fieldnote entries:

Good Notebook Entry Example: GEOLOGIC SETTING OVERVIEW w/ sketch - 2 Notebook Pages:This example showsexample what a“good” GeologicSetting Overviewshould look like.

Includes date &page numbers,externally givenobjectives andlecture (or handout)details, weatherobservation to recallcircumstances at alater date or toindicate possibleassessmentdifficulties, a goodlocation detail,detailed descriptionof outcrop withmineral overview,sizes and mineralassociation outline,and a sketch of theoutcrop with scaleand samplelocations.

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Good Notebook Entry Example: MINERAL DESCRIPTION w/ sketch - 2 Notebook Pages:This example showsexample what a“good” MINERALDESCRIPTION forone of the mineralsshould look like.

Includes date &page numbers,describing mineraltesting methods andresults, includesscaled sketch ofmineral with labels,contains short butcomprehensivedetailed descriptionof mineral overview,gives insight intoobservablecrystallographicdata, includescompilation ofobserved mineralassociations, alsoattributes sampletaken and for whatpurpose.

For complete grading rubric and cover sheet see below!

YOUR NOTES / NOTEBOOKS ARE DUE RIGHT AFTER THE FIELD TRIP!

Note: Be very observant and descriptive for any mineral associations. These are plenty at Calumet. You will get the most pointsfor taking your time and doing a good job on these segments for your four minerals.

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FOR THOSE WHO HAVE NOT TAKEN A FIELD METHODS COURSE (GEL2530), HERE IS A FIELD NOTES &NOTEBOOK SUMMARY

Field Notes & NotebookThe field notebook must be high quality, water-resistant paper with waterproof covers. Standard size is 4 ½ × 7 ¼ in and shouldhave grid or graph paper at least on every second page. Geological field notebooks are not cheap, but well worth it for theybecome a permanent record of your field surveys. While you will purchase a book for this class, it will be a companion in othercourses and is REQUIRED for any field class you will be taken.

Taking good field notes is the most important practice a student canlearn in geologic field work. Field notes should be clean and legible.

First Page Entry

The first page of your field notebook should contain the followinginformation:

1. Full contact information so lost books can be returned.

2. (Your eye height, both US and metric units.)

Taking Field Notes

The field notebook is used to record field information for futurereference. The become a permanent record of your activities. Unlikelecture notes, field notes are often assessed, and when workingcommercially may become company rather than individual property.For this reason they have to be legible and comprehensible to others.

G Field Notes are taken WHILE IN THE FIELD. Not afterwards in the office.G They have good structure with clear text and illustrations. G All measurement and calculations are written out.G Do NOT use cursive handwriting! Lettering (print) is required. For best results, use all UPPERCASE letters like in

architectural drawings.G Date and page number each page for later reference.

Common lettering for architectural or technical drawing:

ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890

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Example of first two pages field note entries:

Notebook Entries

It is ok to use shorthand and abbreviations. Full sentences are not required. Remember that a geologist reading your field notesshould be able to decipher your shorthand. Here are some common terms:

abundant abntalbite Abamount amtamphibole Amandalusite Andandesite Andsangle panhydral anhydanhydrite Anhanorthite Anarkose -ic arkaugite Augaverage avgbetween b/wcalcareous calccarbonate carbcement -ed cmtcontact ctccrystal Xldolomite Doleffervescence effv

euhedral euhydfoliated folformation Fmgabbro Gbrgranite Grgranodiorite Grdgreater >gypsum Gyphematite hemhornblende Hbligneous ignjoint jntlimestone Lsmetamorphic metmuscovite Muscorthoclase Orthpegmatite Pgmplagioclase Plagpyrite Pyquartz Qtz, Qzrhyolite Rhy

rocks Rxrounded rndsandstone Sssedimentary sedshale Shsiliceous silcsiltstone Sltstsmaller <soluble solsubhedral sbhydvolcanic volcwith wwithout w/oxenolith Xen

Add your own:

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Lithologic Symbols for Cross Sections & Stratigraphic Sections

Use lithologic patterns to illustrate stratigraphic sections and geologic map sketches.

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SketchingSketching is one of the most important skills that a geologist can develop. Sketches generally capture geometry and fieldrelationships better than photographs because they accentuate the most important details and are not encumbered by bad lightingand shadows. Sketching forces you to relate intimately to the detail of an outcrop and confront confounding relationships. Youcan and should sketch outcrops, contact relationships, locations, topographic features not clearly shown on map, structuralfeatures, fossils, etc...

When to sketch? If the written description of a geologic feature would take more time and notebook space than would berequired for a sketch, then SKETCH IT! A picture is worth a thousand words' was never truer than in geological field work.

Sketching Rules:G Show scale on the sketch and draw accordingly. If not drawn to scale then indicate.G Title your sketch and indicate type of sketch, e.g. map, outcrop, etc.G Sketches should be large, open and clear. Don't crowd.G Transfer measurements as accurately as possible to your sketch such as angles/azimuths.G Start with a simple outline. Then fill in details to scale.

Numerical Values & Calculations

Record of all measurements (angles, distances, strikes/dips, etc...) made in the field.

Rules:G Write carefully. Words can be guessed at, numbers can NOT.G Make numbers large and unambiguous.

This is a real problem. Which one is the “zero”? O 0 ELettering is therefore critical to distinguish “one” from “seven” (1 or 7) or “zero” from “oh”. (0 or o) Best to place a linethrough the “zero” as shown!

G Never write one number on top of another or try to change one number into another. Either erase completely or crossout incorrect numbers. Write corrected values either above, below or adjacent to the crossed out digit.

G If your numbers have a unit, ALWAYS write the unit behind the number. In general, a number without a unit isuseless!

Calculations & Equations:

G Equations should contain explanation of symbols used.G A reader should be able to follow where your values or numbers come from. Indicate accordingly.G WRITE DOWN UNITS!!!!G Show equations used before indicating any computation

ACCEPTABLE EXAMPLE:

where Wa is mass in g of xl in air, Ww is mass in gms of xl in H2O determ. w/ 10-0.1g Pen Scale (Density Field Kit). SG = specific gravity in g/cm3 .

UNACCEPTABLE EXAMPLE: answer is 2.8. obtained by dividing the measurements by the difference.

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GEL 3050 - Mineralogy & Optical MineralogyCalumet Mine Assignment

SUBMIT THIS SHEET WITH YOUR FIELD NOTES / NOTEBOOK

COMPLETED FIELD NOTES DUE TO INSTRUCTOR WHEN LEAVING THE FIELD TRIP SITE!!!

PROJECT GRADING RUBRIC

Name: Course ID:

Overall FINAL Grade:%

/100

Pts: /20 Pts: /20 Pts: /20 Pts: /20 Pts: /20

Geologic SettingOverview

Mineral 1: Mineral 2: Mineral 3: Mineral 4:

G Formation /Rock Matrix

G ObservableDiagenesis

G Outcropdescription &Outcrop Size

G LocationG Sample points

Mineral Sketch w/scale /5

Mineral Sketch w/scale /5

Mineral Sketch w/scale /5

Mineral Sketch w/scale /5

Physical Properties Color; Cleavage; Hardness;Specific Gravity; Streak;Other; etc.

/3

Physical Properties Color; Cleavage; Hardness;Specific Gravity; Streak;Other; etc.

/3

Physical Properties Color; Cleavage; Hardness;Specific Gravity; Streak;Other; etc.

/3

Physical Properties Color; Cleavage; Hardness;Specific Gravity; Streak;Other; etc.

/3

CrystallographySize; Transparency; Form;Crystal Class; Habit; etc.

/3

CrystallographySize; Transparency; Form;Crystal Class; Habit; etc.

/3

CrystallographySize; Transparency; Form;Crystal Class; Habit; etc.

/3

CrystallographySize; Transparency; Form;Crystal Class; Habit; etc.

/3

Mineral AssociationsContact / boundaries withother minerals; Xenoliths;Connections / Exclusions;etc.

/9

Mineral AssociationsContact / boundaries withother minerals; Xenoliths;Connections / Exclusions;etc.

/9

Mineral AssociationsContact / boundaries withother minerals; Xenoliths;Connections / Exclusions;etc.

/9

Mineral AssociationsContact / boundaries withother minerals; Xenoliths;Connections / Exclusions;etc.

/9

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Helpful background information for the assignment:Copy / re-sketch pertinent info into your field notebook. Maybe used as quotes for the geologic overview section.

S t r a t i g r a p h i cSection, Calumetdistrict, Colorado

(Modi f i ed f romBehre Jr., C.H.,Osborn, E.F. andRainwater, E.H.,1936, Contact OreDeposition at theCalumet Iron Mine,Colorado, EconomicGeology, v. 31, pp.781-804)

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Geologic Map of theCalumet district, Colorado

(Modified from Behre Jr.,C.H., Osborn, E.F. andRainwater, E.H., 1936,Contact Ore Deposition atthe Calumet Iron Mine,C o lo ra d o , E c o n o m i cGeology, v. 31, pp. 781-804)

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Detailed Geologic Map of the Calumet Mine area,Colorado

(Modified from Behre Jr.,C.H., Osborn, E.F. andRainwater, E.H., 1936,Contact Ore Deposition atthe Calumet Iron Mine,Co lo ra d o , Eco n o micGeology, v. 31, pp. 781-804)