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Collecting Wind Mountain (in the Cornudas Mountains, NM, USA): Part II

Last Updated: 6th Apr 2017

By Michael C. Michayluk

Collecting Wind Mountain (in the Cornudas Mountains of Otero Co., New Mexico, USA); Part II
by: Michael C. Michayluk and Jerry Cone


Link to Collecting Wind Mountain (in the Cornudas Mountains of Otero Co., New Mexico, USA); Part I
by: Michael C. Michayluk and Jerry Cone




Introduction
This article is a result of 5 additional collecting trips to Wind Mountain from April to July of 2016 as well as the ongoing analysis from previous collecting trips. It is a continuation of Collecting Wind Mountain: Part I.

List of minerals collected in Part I:

Aegirine
Albite
Analcime
Biotite
Calcite
Catapleiite
Chabazite
Eudialyte
Lavenite
Microcline
Molybdenite
Monazite-(Ce)
Natrolite
Nepheline
Nordstrandite
Opal
Siderite
Smectite Group
Thomsonite- (Ca)
Wad
Yofortierite

New minerals collected by the authors:


Elpidite: Na2ZrSi6O15 · 3H2O - White to tan; prismatic and acicular, usually clustered



Epididymite: Na2Be2Si6O15 · H2O - Psuedohexagonal plate showing characteristic twinning patterns. Visually identified. Only one specimen recovered



Fluorite: CaF2 - Cubododecahedral green/blue crystal. No fluorescence in SW and very weak, blue/white fluorescence in long wave.



Gaidonnayite: Na2Zr(Si3O9) · 2H2O - Isolated, colorless/ white/ and brown, often chisel shaped crystals



Heulandite-Ca: (Ca,Na)5(Si27Al9)O72 · 26H2O - Colorless to reddish brown monoclinic crystals and crystal aggregates. EDS analysis indicated the presence of Mg.



Labuntsovite Supergroup - Pink prismatic crystals, perhaps Gutkovaite



Lemoynite: (Na,K)2CaZr2Si10O26 · 5H2O - tan, spheroidal aggregate



Lovozerite: Na2Ca(Zr,Ti)(Si6O12)[(OH)4O2] · H2O - brown/black spotted mass



Parisite-Ce: CaCe2(CO3)3F2Fine grained orange coatings over zircon crystals

Polylithionite: KLi2Al(Si4O10)(F,OH)2 - tan to colorless micaceous sheets





Quartz: SiO2 - Colorless clusters near contact zones



Sphalerite: ZnS - Translucent, yellow crystal. Only one specimen found



Titanite: CaTi(SiO4)O - Yellow, euhedral crystal included in black ferrohornblende.



Tuperssuatsiaite: Na2Fe3Si8O20(OH)2 · 4H2O - green aciciular tufts.



Zircon: Zr(SiO4) Small prismatic crystals often coated by REE-carbonate.



Map of Wind Mountain

The following figure was taken from McLemore et al.’s 1996 article in Canadian Mineralogist, “Petrology and mineral resources of the Wind Mountain laccolith, New Mexico and Texas”. McLemore et al. based the map on thesis work done by P. Graseah in 1992. I have added asterisks indicating estimates of different sub localities on the mountain and some of the minerals they have produced for Jerry and I. These lists are by no means a complete list of the minerals found at each sub-location and solely represent what Jerry and I have collected.

Annotated map of Wind Mountain


*- talus field; aegirine, albite, analcime, calcite, catapleiite, lavenite (rare), microcline, molybdenite (rare), monazite-Ce (rare), natrolite, siderite, thomsonite-Ca

**- phonolite dike; aegirine, albite, analcime, biotite, calcite, catapleiite, chabazite, microcline, natrolite, titanite (rare), tuperssuatsiaite, yofortierite, 

***- talus at base of mountain; aegirine, albite, analcime, calcite, catapleiite, eudialyte, hochelagaite (rare),lavenite (rare), microcline, natrolite, siderite, thomsonite-Ca
****- series of vein/dikes near adit; aegirine, albite, analcime, calcite, catapleiite, elpidite, eudialyte, fluorite, gaidonnayite, heulandite-Ca, microcline, natrolite, polylithionite, quartz, thomsonite-Ca

Complete list of minerals collected by the authors; this by no means represents a comprehensive list of Wind Mountain


* = at least one specimen analyzed by EDS performed by Kaygeedee minerals
+ = at least one specimen analyzed by XRD performed by the New Mexico Bureau of Geology
All analytical data can be found on mindat as child photos to specimens analyzed

Albite
Analcime
Biotite*
Calcite
Catapleiite*+
Chabazite*+
Elpidite*
Epididymite
Eudialyte
Fluorite
Gaidonnayite*
Heulandite-Ca*
Labuntsovite Supergroup*
Lavenite*
Lemoynite*
Lovozerite*
Microcline
Molybdenite*
Monazite-(Ce)*
Natrolite*+
Nepheline
Nordstrandite*
Opal
Parisite-Ce*
Polylithionite*
Quartz
Siderite*
Smectite Group*
Sphalerite*
Titanite*
Thomsonite- (Ca)*+
Tuperssuatsiaite*
Wad*
Yofortierite*+
Zircon*




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Comments

I will continue to update both Wind Mountain articles with better information and pictures as well as work toward part 3! Cheers!

Michael C. Michayluk
24th Nov 2016 3:47am
Michael & Jerry, both articles are well done! Nice work! Now you've got Cookie wanting to go back - as if she didn't have enough Wind Mountain rough to break up and 'scope!!

Don Saathoff

Don Saathoff
27th Nov 2016 6:27pm
Thanks Michael for taking the time to write this article. It contains a lot of good information on this interesting locality. One day I need to get to Wind Mountain and collect a few rocks!

William Moats
4th Dec 2016 4:46pm
Don,
Thanks!

William,
It's my pleasure! Wind Mountain fascinates me and I know there are many minerals that have yet to be found there! I hope you make the trek, and if you do, let me know what you find!

Michael.michayluk@gmail.com

Michael C. Michayluk
6th Dec 2016 10:17pm

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