Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
New Almaden District, Santa Cruz Mts, Santa Clara Co., California, USA

Oldest recorded age at locality: 168
Youngest recorded age at locality: 168

mindat Locality ID: 25791
mindat URL: http://www.mindat.org/loc-25791.html

Tectonic Settings:

Total number of sublocalities beneath "New Almaden District, Santa Cruz Mts, Santa Clara Co., California, USA": 42
Total number of bottom-level sublocalities: 41

Number of Child Localities: 1
Child Localities:
New Almaden

Latitude: 37°11'17"N
Longitude: 121°50'58"W
Decimal Degree (lat, lon): 37.188055555556,-121.84944444444

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Allophane	Alunite	Amorphous	Amphibole	Aragonite	Arsenopyrite	Calcite	Chalcopyrite	Clay	Epsomite
Fluorite	Gyrolite	Malachite	Millerite	None	Not in a structural group	Pyrite	Quartz	Rocksalt	Sphalerite
Spinel	Stibnite	Stilpnomelane

Aragonite ()*	Arsenopyrite ()*	Azurite ()*	Bavenite ()*	Bornite ()*
Calcite ()*	Chalcopyrite ()*	Chromite ()*	Chrysocolla ()*	Cinnabar ()*
Dolomite ()*	Epsomite ()*	Fluorite ()*	Galena ()*	Glaucophane ()*
Gyrolite ()*	Jarosite ()*	Malachite ()*	Mercury ()*	Metacinnabar ()*
Millerite ()*	Opal ()*	Pyrite ()*	Quartz ()*	Sphalerite ()*
Stibnite ()*	Stilpnomelane ()*	Tiemannite ()*	Zaratite ()*

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al As Be C Ca Cr Cu F Fe H Hg K Mg Na Ni O Pb S Sb Se Si Zn

Elements from minerals reported directly at this locality: Al Be C Ca Fe H K Mg Na Ni O Si

Structural Groups for minerals in this locality:
Allophane Alunite Amorphous Amphibole Aragonite Arsenopyrite Calcite Chalcopyrite Clay Epsomite
Fluorite Gyrolite Malachite Millerite None Not in a structural group Pyrite Quartz Rocksalt Sphalerite
Spinel Stibnite Stilpnomelane

29 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Aragonite ()*	Aragonite	Ca(CO₃)	168	168	0		3250
Arsenopyrite ()*	Arsenopyrite	FeAsS			1	176278	9052
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂			1	176272	5509
Bavenite ()*	None	Ca₄Be_2+xAl_2-xSi₉O_26-x(OH)_2+x (x = 0 to 1)	168	168	0		255
Bornite ()*	None	Cu₅FeS₄			2	176261,176272	5516
Calcite ()*	Calcite	Ca(CO₃)			4	176272,176278,176279,176286	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			2	176272,176278	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	168	168	1	176276	3902
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O			1	176287	3531
Cinnabar ()*	None	HgS			23	176261,176262,176263,176265,176266,176267,176269,176270,176272,176274,176278,176279,176281,176282,176283,176285,176286,176288,176289,176290,176291,176301,176302	2600
Dolomite ()*	None	CaMg(CO₃)₂			8	176263,176267,176272,176274,176278,176285,176288,176290	9895
Epsomite ()*	Epsomite	Mg(SO₄)·7H₂O			1	176278	484
Fluorite ()*	Fluorite	CaF₂			1	176294	9617
Galena ()*	Rocksalt	PbS			2	176272,176278	24243
Glaucophane ()*	Amphibole	Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂	168	168	0		286
Gyrolite ()*	Gyrolite	NaCa₁₆(Si₂₃Al)O₆₀(OH)₈·14H₂O			1	176278	142
Jarosite ()*	Alunite	KFe³⁺₃(SO₄)₂(OH)₆			1	176278	2228
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			1	176272	12537
Mercury ()*	None	Hg			6	176266,176272,176274,176278,176279,176291	397
Metacinnabar ()*	Sphalerite	HgS			2	176272,176278	255
Millerite ()*	Millerite	NiS			1	176278	1066
Opal ()*	Amorphous	SiO₂·nH₂O			2	176272,176278	2994
Pyrite ()*	Pyrite	FeS₂			3	176272,176278,176285	39462
Quartz ()*	Quartz	SiO₂			9	176262,176263,176267,176272,176277,176278,176286,176288,176289	61156
Sphalerite ()*	Sphalerite	ZnS			1	176272	21482
Stibnite ()*	Stibnite	Sb₂S₃			3	176261,176272,176278	3418
Stilpnomelane ()*	Stilpnomelane Clay	(K,Ca,Na)(Fe,Mg,Al)₈(Si,Al)₁₂(O,OH)₃₆·nH₂O	168	168	0		456
Tiemannite ()*	Sphalerite	HgSe			1	176272	83
Zaratite ()*	Amorphous	Ni₃(CO₃)(OH)₄·4H₂O	168	168	0		56

1 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	podchrome-00018	168	168	Middle Jurassic (U-Pb, zircon in plagiogranite?)										Cr	92263	Kilday Ranch Deposits, New Almaden, New Almaden District, Santa Cruz Mts, Santa Clara Co., California, USA	Kilday Ranch	Moiser et al. (2012)		USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...