Curve Mnemonic Dictionary

Minerals

Code	Mineral Group	Mineral Class	Formula	Occurrence	Rhoe Calc	Rhol Calc	Gr Meas	Pef Calc	Pef Meas	Uma Calc	Sigma Calc	Sigma Meas	Ls Calc	Ld Calc	Epi Calc	Epi Meas	Therm Calc	Therm Meas	Bmod Calc	Smod Calc	Dtc Calc	Dts Calc	Pr Calc	Tp Calc	Mol Wt Calc	Rho Calc	H Calc	C Calc	O Calc	Na Calc	Na Meas	Mg Calc	Mg Meas	Al Calc	Al Meas	Si Calc	Si Meas	K Calc	K Meas	Ca Calc	Ca Meas	Fe Calc	Fe Meas	B Calc	B Meas	N Calc	F Calc	P Calc	S Calc	S Meas	Cl Calc	Ti Calc	Ti Meas	Mn Calc	Cu Calc	Zn Calc	Sr Calc	Zr Calc	Ba Calc	Pb Calc	Th Meas	U Meas	Gd Meas	Loi Meas	H Loi Meas	Trace Elements	Description
Albite	Plagioclase Feldspar	Framework Silicate	NaAlSi3O8	In all shales and sands; often authigenic.	2.59	2.58	8.00	1.68	2.10	4.35	7.64	11.40	28.38	14.90	-1.00	-0.80	-1.30	-0.50	75.60	25.60	154.90	320.60	0.35	8.00	262.24	2.61			48.80	8.80	7.30		0.10	10.30	11.80	32.10	30.00		0.50		2.30		0.10		28.00					0.01			0.01								0.00	0.00	0.20	0.50	0.20	Mg->0.6 K:0.2->1.6 Fe->0.05 Th:0.5->3ppm U:0.2->5ppm
Almandine	Garnet	Neso-Silicate	Fe3Al2(SiO4)3	Common accessory in sands and gravel, metamorphic rock source.	4.13	4.23		11.09		45.82	44.51		19.22	4.31	2.70		7.50		176.30	95.20	117.50	209.70	0.27		497.78	4.25			38.60					10.80		16.90						33.70																								Mg->3.9 Ca->1.3 Mn->1.2
Alunite		Sulfate	KAl3(SO4)2(OH)6	In volcaniclastic sediments.	2.76	2.77		2.48		6.85	23.30		8.89	4.05	48.90		50.70								414.22	2.75	1.50		54.10					19.50				9.40											15.50																	Na
Analcime	Zeolite	Framework Silicate	NaAlSi2O6*(H2O)	Accessory in volcaniclastic sediments.	2.28	2.25		1.53		3.48	11.03		12.68	7.59	15.60		16.60								220.17	2.28	0.90		50.90	10.40				12.30		25.50																														K:0.6->3.7 Ca->0.15
Anhydrite		Sulfate	CaSO4	Common in evaporites. Anhydrite is stable in subsurface.	2.96	2.98		5.05		14.95	12.45		29.32	11.50	-1.20		-0.70		56.10	29.10	177.20	319.90	0.28	8.40	136.15	2.96			47.00											29.40									23.60																	Sr->1 U:0.2->0.45ppm Ba
Ankerite		Carbonate	Ca(Fe,Mg,Mn)(CO3)2	In carbonates and shales	3.05	3.08		8.44		25.79	26.90		19.99	5.97	2.10		5.70								207.70	3.10		11.60	46.20			3.00								19.30		18.30												1.60
Anorthite	Plagioclase Feldspar	Framework Silicate	CaAl2Si2O8		2.74	2.74	1.00	3.13	3.00	8.57	7.38	9.40	30.26	15.33	-1.30	-0.70	-1.60	-0.80			147.60			8.00	278.22	2.76			46.00		1.40		0.30	19.40	17.70	20.20	21.70		0.00	14.40	12.10		0.30		11.00					0.00			0.02								0.00	0.10	0.10	0.70	0.30	K->0.05 Fe->0.5 Th:0.5->3ppm U:0.2->5ppm
Anthracite		Organic	CH.358N.009O.022	In shales and organic-rich beds, organic source.	1.55	1.47		0.16		0.25	8.71		9.07	6.06	46.10		41.40				344.50				12.85	1.51	2.80	93.50	2.70																	1.00
Antigorite	Serpentine	Sheet Silicate	Mg2Fe(Si2O5)(OH)4	Fragments in detrital rocks,low grade metamorphic source	2.82	2.83		6.38		18.03	24.06		9.05	3.97	46.40		49.10								308.70	2.83	1.30		46.60			15.80				18.20						18.10																								Al,Fe,Ni
Aragonite		Carbonate	CaCO3	In carbonates, biogenic source.	2.94	2.96		5.08		14.93	7.68		22.44	12.41	0.70		1.00		44.80	38.80	173.90	274.30	0.16		100.09	2.94		12.00	48.00											40.00																										Sr->3.4 Pb
Barite		Sulfate	BaSO4	Common cement in sandstones and carbonates.	3.99	4.08		266.82		1065.15	19.89		28.60	8.39	-1.00		0.20		54.50	23.80	228.70	435.40	0.31		233.43	4.48			27.40																				13.70										58.80							Ca,Sr,Pb
Biotite	Mica	Sheet Silicate	K(Mg,Fe)3(Al,Fe)Si3O10(OH,F)2	Common in less mature sediments.	3.16	3.20	127.00	8.70	7.00	27.53	35.09	54.10	12.64	4.30	15.80	5.20	22.50	11.00	59.70	42.30	162.10	268.40		8.00	480.39	3.22	0.40		40.00		0.40	5.10	7.70	5.60	6.00	17.50	18.20	8.10	7.20		0.20	23.30	13.60		35.00					0.07			1.48								1.50	0.70	0.20	0.80	1.10	Th:0.5->50ppm U:1->40ppm
Bituminous Coal		Organic	CH.793N.015O.078	In shales and organic-rich beds, organic source.	1.34	1.24		0.17		0.22	14.36		7.81	3.99	60.00		60.00				393.70				14.27	1.27	5.60	84.20	8.70																	1.50																				U
Boehmite		Hydroxide	AlO(OH)	In bauxites and laterites.	3.05	3.08		1.35		4.13	17.25		7.45	4.24	60.00		60.00								59.99	3.05	1.70		53.30					45.00																																Fe->4.6
Brucite		Hydroxide	Mg(OH)2	Predominant in highly weathered soils.	2.46	2.44		1.01		2.48	17.95		6.42	3.41	60.00		60.00								58.34	2.39	3.50		54.90			41.70
Calcite		Carbonate	Ca(CO3)	Very common in sedimentary as particles or cements.	2.71	2.71	11.00	5.08	5.20	13.77	7.08	7.40	24.34	13.46	0.00	0.00	0.00	0.20	70.20	29.00	157.80	305.80	0.32	9.10	100.09	2.71		12.00	48.00		0.00		0.20		0.00		0.20		0.00	40.00	39.40		0.10		0.10					0.05			0.00								0.00	1.40	0.50	43.80	0.10	Mg,Mn,Fe,Co,Zn,U
Carnallite		Halide	KMgCl3*6(H2O)	In evaporites.	1.64	1.56		4.09		6.69	365.62		8.88	0.74	49.10		58.40				255.90				277.89	1.60	4.40		34.50			8.80						14.10													38.30															Br,Rb,Cs
Celestine		Sulfate	SrSO4	Rare authigenic accessory in carbonates.	3.70	3.77		55.19		204.12	22.41				-1.00		-11.00		81.90	21.40	189.30	429.80	0.38		183.70	3.95			34.80																				17.50								47.70									Ca,Ba
Celestite		Sulfate	SrSO4	Rare authigenic accessory in carbonates.	3.70	3.77		55.19		204.12	22.41				-1.00		-11.00		81.90	21.40	189.30	429.80	0.38		183.70	3.95			34.80																				17.50								47.70									Ca,Ba
Chalcopyrite		Sulfide	CuFeS2	Accessory in shales, sandstones.	3.98	4.07		26.72		106.38	102.67		37.38	3.66	-2.00		-1.20								183.52	4.20																30.40							34.90						34.60											Au,Ag,Pt,Pb,Co,Ni,As,Se,Tl
Chlorite (all)	Clay	Sheet Silicate	See Fe-Chlorite and Mg-Chlorite	Common clay in shales. Fe-rich in sandstones is authigenic.			56.00		8.10			43.70				61.00		48.20													0.10		4.80		9.60		14.00		0.40		0.70		20.80		20.00					0.10			1.32								7.00	2.90	5.00	8.80	9.20		Chlorite from various sources. See also Fe-Chlorite and Mg-Chlorite.
Chlorite (sed)	Clay	Sheet Silicate	See Fe-Chlorite and Mg-Chlorite	Common clay in shales. Fe-rich in sandstones is authigenic.			111.00		7.80			50.50				42.90		48.20													0.30		2.50		9.00		17.90		0.90		1.60		16.40		47.00					0.20			2.37								16.00	4.20	10.00	8.10	7.00		Chlorite from sedimentary sources only. See also Fe-Chlorite and Mg-Chlorite.
Corundum		Oxide	Al2O3	Rare accessory in sandstones.	3.94	4.03		1.55		6.12	10.98		20.62	10.64	1.70		2.70		252.90	162.10	92.20	156.80	0.24		101.96	4.02			47.10					52.90																																Ti,Cr,Fe
Cristobalite	Silica	Framework Silicate	SiO2	In silicious sediments, rare polymorph of quartz.	2.33	2.30		1.81		4.20	4.00		32.77	21.72	-1.60		-2.80								60.09	2.33			53.30							46.70
Dolomite		Carbonate	CaMg(CO3)2	In carbonates, alteration of calcite.	2.86	2.88	8.00	3.14	3.40	9.00	4.70	6.90	20.65	15.38	1.70	1.70	0.50	1.50	69.40	51.60	144.40	236.20	0.20	8.70	184.42	2.87		13.00	52.10		0.00	13.20	12.30		0.10		0.60		0.00	21.70	21.60		0.70		5.00					0.07			0.01								0.10	0.90	1.30	47.10	0.10	Mn,Fe,Co,Zn,Pb
Dravite		Ring Silicate	NaMg3Al6(BO3)3Si6O18(OH)4	In limestone and gypsum. Accessory in detrital sediments.	3.01	3.03		1.43		4.30	4347.25		10.89	0.14	25.90		37.40		102.10	78.70	121.40	196.90	0.19		958.86	3.03	0.40		51.70	2.40		7.60		16.90		17.60								3.40																						Ca,Ti,Mn,Fe
Epidote	Epidote	Soro-Silicate	Ca2FeAl2O(SiO4)(Si2O7)(OH)	Common contact metamorphic deposit in carbonates.	3.39	3.44		6.49		22.01	20.22		14.79	6.51	9.00		12.80		106.50	61.10	134.50	235.90	0.26		483.25	3.43	0.20		43.00					11.20		17.40				16.60		11.60																								Mg,Ti
Fayalite	Olivine	Neso-Silicate	Fe2SiO4	Accessory in immature sediments, mafic rock source.	4.17	4.28		17.17		71.68	67.87		19.93	3.21	2.20		7.20								203.79	4.34			31.40							13.80						54.80																								Mg->2 Ca->1.5 Mn->2.5 Ti
Fe-Chlorite	Clay	Sheet Silicate	(Fe5Al)Si3AlO10(OH)8	Common clay in shales. Fe-rich in sandstones is authigenic.	3.36	3.40		12.36		41.47	47.44		8.31	2.66	60.00		60.00							8.00	713.54	3.42	1.10		40.40					7.60		11.80						39.10																								K->0.3 Th:3->5ppm Al,Cr,Mn,Ni
Fluorapatite	Apatite	Phosphate	Ca5(PO4)3F	Common accessory in all sediments.	3.17	3.21		5.82		18.47	10.23		26.86	11.91	-0.70		-0.20		86.50	46.60	147.00	262.50	0.27		504.33	3.20			38.10											39.70							3.80	18.40																		Na->7 K->4 Mn->5.8 Sr->9.3 Y->10.6 U->20000ppm Al,Ce,La,Ba
Fluorite		Halide	CaF2	In carbonates, cement in sandstones.	3.10	3.12		6.71		20.76	11.02		28.79	11.62	-1.10		-0.60		86.40	41.80	149.60	275.90	0.29		78.08	3.18														51.30							48.70																			Sr,Y,Ce
Forsterite	Olivine	Neso-Silicate	Mg2SiO4	Accessory in immature sediments,mafic rock source.	3.20	3.24		1.54		4.92	4.10		22.37	17.52	0.80		-0.60		129.80	84.40	117.10	198.50	0.23		140.73	3.22			45.50			34.60				20.00																														Mn->0.1 Fe->3 Ti,Cr,Ni
Galena		Sulfide	PbS	Rare accessory in detrital rocks, hydrothermal source.	6.19	6.44		1631.37		10102.58	13.13		69.12	30.63	-2.60		-4.10								239.28	7.56																							13.40											86.60
Gibbsite		Hydroxide	Al(OH)3	Predominant in highly weathered soils.	2.44	2.42		1.10		2.70	22.55		6.14	2.92	60.00		60.00								78.00	2.38	3.90		61.50					34.60																																Th:10->132 U:3->30 Fe
Glauconite	Clay	Sheet Silicate	K.7(Fe.7Al1.3)(Si3.3Al.7)O10(OH)2	As green pellets in marine shales and sands.	2.82	2.83	150.00	4.79	6.70	13.53	20.89	89.60	13.32	5.87	13.20	20.20	17.50								407.14	2.85	0.50		47.20		0.00		2.10	13.30	4.40	22.80	23.10	6.70	5.90		0.50	9.60	15.50		500.00					0.10			0.09								3.00	5.40	4.00	8.30	6.10	Th:3->10ppm U:2->5ppm
Goethite		Hydroxide	FeO(OH)	Alteration product in iron-bearing sediments.	4.15	4.26		19.02		78.98	84.09		6.83	1.73	60.00		60.00								88.86	4.29	1.10		36.00													62.90																								Mn->5
Gypsum		Sulfate	CaSO4*2(H2O)	Common in evaporites.	2.37	2.35		3.99		9.46	18.49		8.39	4.08	58.50		57.60				172.30			6.80	172.18	2.32	2.30		55.80											23.30									18.60
Halite		Halide	NaCl	In evaporites.	2.07	2.03		4.65		9.63	748.44		42.10	0.68	-2.20		-1.80		24.80	14.90	219.80	380.60	0.25	7.90	58.45	2.16				39.30																					60.70
Halloysite	Clay	Sheet Silicate	Al2Si2O5(OH)4*2(H2O)	In all detrital rocks, derived from highly leached soils; common authigenic in acidic pore fluids.	2.12	2.08		1.34		2.83	14.74		8.52	4.50	55.80		54.10								294.20	2.08	2.70		59.80					18.30		19.10																														Mg->0.2 K->0.6 Ti->0.5 Fe->0.5 Th:7->47ppm U:1->12ppm Na
Hematite		Oxide	Fe2O3	Common cement in shales and sandstones.	5.00	5.16		21.48		107.32	101.37		16.68	2.26	5.50		12.60		100.20	95.20	151.90	234.60	0.14		159.70	5.25			30.10													69.90																								Ti->3 Mg,Mn
Heulandite	Zeolite	Framework Silicate	(Ca,Na2)(Al2Si7O18)*6(H2O)	Accessory in volcaniclastic sediments.	2.28	2.25		2.06		4.69	12.61		10.00	5.70	34.00		34.30								709.76	2.25	1.70		54.10	3.20				7.60		27.70				5.60																										K->1.7 Sr->3.6
Hydroxyapatite	Apatite	Phosphate	Ca5PO43OH	Common accessory in all sediments.	3.14	3.17		5.81		18.22	11.33		16.73	9.42	5.50		6.70		83.90	60.70	139.80	230.30	0.21		502.33	3.15	0.20		41.40											39.90								18.50																		Na->7 K->4 Mn->5.8 Sr->9.3 Y->10.6 U->20000ppm Al,Ce,La,Ba
Illite	Clay	Sheet Silicate	K.8Al1.6Fe.2Mg.2Si3.4Al.6O10OH2	In all detrital rocks, product of soils and diagenetic alteration.	2.76	2.77	160.00	3.03	4.00	8.37	16.74	40.60	13.47	6.69	12.70	17.60	15.80	24.70						8.00	396.19	2.78	0.50		48.50		0.40	1.20	1.20	15.00	10.50	24.10	24.90	7.90	4.50		0.50	2.80	4.80		163.00					0.60			0.50								12.00	4.80	4.00	9.90	5.50	Mg->1.25 Fe->3.5 Th:10->25ppm U:1->21ppm Na,Ti,Mn
Ilmenite		Oxide	FeTiO3	Accessory in sandstones.	4.27	4.38		16.63		71.02	154.48		18.30	2.05	3.60		9.80								151.75	4.50			31.60													36.80										31.60														Mg,Mn
K-Feldspar	Alkali Feldspar	Framework Silicate	KAlSi3O8	In all sedimentary rocks.	2.55	2.54	171.00	2.86	3.40	7.29	15.82	15.30	32.13	10.69	-1.50	-1.00	-1.10	-0.60			226.40			8.00	278.35	2.57			46.00		2.00		0.00	9.70	10.00	30.30	30.00	14.00	10.20		0.10		0.20		21.00					0.00			0.01								1.10	0.40	0.30	0.50	0.40	Na->5 Th:3->7ppm U:0.2->3ppm Ca,Fe
Kaolinite	Clay	Sheet Silicate	Al4(Si4O10)(OH)8	In all detrital rocks, derived from highly leached soils; common authigenic in acidic pore fluids.	2.64	2.64	104.00	1.49	2.10	3.92	13.04	20.10	8.96	5.38	47.80	43.30	45.10	45.00	1.50	1.40	694.60	1075.20	0.14	8.00	258.17	2.62	1.60		55.80		0.10		0.10	20.90	20.40	21.80	20.80		0.10		0.10		0.40		14.00					0.01			1.13								19.00	3.20	4.00	14.20	12.90	Mg->0.2 K->0.6 Ti->0.5 Fe->0.5 Th:7->47ppm U:1->12ppm Na
Langbeinite		Sulfate	K2Mg2(SO4)3	Rare, nodules or grains in evaporites.	2.81	2.82		3.56		10.00	24.18		28.64	8.15	-1.00		0.20				170.60				415.04	2.83			46.30			11.70						18.80											23.20
Laumontite	Zeolite	Framework Silicate	CaAl2Si4O12*4(H2O)	Accessory in volcaniclastic sediments.	2.32	2.29		2.33		5.40	12.41		9.87	5.69	35.40		35.30								470.46	2.29	1.70		54.40					11.50		23.90				8.50																										Na->0.3 K->0.25
Lignite		Organic	CH.849N.015O.211	In shales and organic-rich beds, organic source.	1.29	1.19		0.20		0.26	12.90		8.53	4.44	55.60		54.20				525.00				16.45	1.23	5.20	73.00	20.50																	1.30																				S
Limonite		Hydroxide	FeO(OH)*2.05(H2O)	Alteration product in iron-bearing sediments.	3.63	3.70		13.00		47.24	73.31		4.12	1.26	60.00		60.00		60.10	31.30	186.70	336.60	0.28	11.00	125.79	3.60	4.10		51.50													44.40																								P->2 V
Magnetite		Oxide	Fe3O4	Accessory in sandstones and shales.	4.92	5.08		22.24		109.46	103.47		17.43	2.25	4.50		11.20		161.40	91.40	135.50	238.50	0.26		231.55	5.18			27.60													72.40																								Al->1.9 V->1 Cr->0.3 Mn->6.2 Th:0.3->20ppm U:1->30ppm Mg,Ca,Ti,Co,Ni,Zn
Mg-Chlorite	Clay	Sheet Silicate	(Mg5Al)Si3AlO10(OH)8	Common clay in shales. Fe-rich in sandstones is authigenic.	2.67	2.67		1.39		3.70	11.34		9.00	5.85	47.10		42.80								555.89	2.65	1.50		51.80			21.90		9.70		15.20																														K->0.3 Th:3->5ppm Al,Cr,Mn,Ni
Montmorillonite	Clay	Sheet Silicate	Na.33(Al1.67Mg.33)(Si4O10)(OH)2	In all detrital rocks, predominantly shales, soil weathering product.	2.63	2.62		1.63		4.29	8.34		13.50	9.53	12.60		11.50								367.05	2.22	0.50		52.30	2.10		2.20		12.30		30.60																														Th:6->44ppm U:1->21ppm
Montmorillonite 4H2O	Clay	Sheet Silicate	Na.33(Al1.67Mg.33)(Si4O10)(OH)2*4(H2O)	In all detrital rocks, predominantly shales, soil weathering product.	2.26	2.23		1.41		3.17	13.97		8.73	4.82	51.90		50.00							8.00	367.05	2.22	0.50		52.30	2.10		2.20		12.30		30.60																														Th:6->44ppm U:1->21ppm
Mordenite	Zeolite	Framework Silicate	(Na2,K2,Ca)(Al2Si10O24)*7(H2O)	Rare accessory in volcaniclastic sediments.	2.15	2.11		1.78		3.84	12.30		10.98	6.12	25.20		26.70								902.43	2.13	1.60		55.00	3.30				6.00		31.10		2.20		0.90
Muscovite	Mica	Sheet Silicate	KAl2(AlSi3)O10(OH)2	Very common in shales, sandstone.	2.82	2.83	130.00	2.40	4.00	6.79	17.06	95.30	13.27	6.63	13.40	10.70	16.50	20.80	61.50	41.10	154.90	260.50	0.23	9.00	398.33	2.84	0.50		48.20		0.50		0.10	20.30	19.10	21.20	21.10	9.80	7.80		0.10		1.30		450.00					0.04			0.03								0.00	0.70	0.00	4.80	3.50	Th:10->25ppm U:2->8ppm Na,Mg,Ti,V,Cr,Mn,Fe,Rb,Ba
Natron	Hydrous Carbonate	Carbonate	Na2CO3O10*2(H2O)	In evaporites.	1.56	1.48		0.52		0.81	23.84		6.68	2.73	60.00		60.00								286.15	1.47	7.00	4.20	72.70	16.10
Opal	Silica	Framework Silicate	SiO2*.1209(H2O)	In silicious sediments, biogenic source.	2.17	2.13	79.00	1.75	2.50	3.79	5.26	22.60	18.62	14.37	3.30	4.70	1.90	8.50			190.30				62.27	2.16	1.00		56.40		0.70		0.30		1.40	42.60	40.00		0.50		0.50		0.50		160.00					0.35			0.10								4.70	6.50	1.30	6.50	4.20	Mg,Na,Al,K,Ca,Fe
Orthoclase	Alkali Feldspar	Framework Silicate	KAlSi3O8	In all sedimentary rocks.	2.55	2.54	171.00	2.86	3.40	7.29	15.82	15.30	32.13	10.69	-1.50	-1.00	-1.10	-0.60			226.40			8.00	278.35	2.57			46.00		2.00		0.00	9.70	10.00	30.30	30.00	14.00	10.20		0.10		0.20		21.00					0.00			0.01								1.10	0.40	0.30	0.50	0.40	Na->5 Th:3->7ppm U:0.2->3ppm Ca,Fe
Peat		Organic	CH.880N.050O.510	In shales and organic-rich beds, organic source.	1.14	1.04		0.25		0.29	9.12		11.11	6.21	24.30		25.80								21.76	1.10	4.10	55.20	37.50																	3.20
Perovskite		Oxide	CaTiO3	Rare accessory in sandstones, ultrabasic source.	3.91	4.00		9.53		37.30	116.37		21.94	2.85	1.00		5.30								135.98	4.03			35.30											29.50												35.20
Phlogopite	Mica	Sheet Silicate	KMg3(AlSi3O10)(OH)2	Rare	2.79	2.80		2.30		6.42	14.95		13.34	7.10	13.10		15.50		58.50	40.10	158.10	264.10	0.22		417.33	2.80	0.50		46.00			17.50		6.50		20.20		9.40																												Ti->5.3 Mn->4.8 Th:10->25ppm U:2->8ppm
Polyhalite		Sulfate	K2MgCa2(SO4)4*2(H2O)	Rare, nodules or grains in evaporites.	2.78	2.79		4.32		12.02	23.70		12.48	5.25	16.50		21.60				188.70				602.98	2.78	0.70		47.80			4.00						13.00		13.30									21.30
Pyrite		Sulfide	FeS2	Common in all organic-rich, reducing environment rocks.	4.84	5.00		16.97		82.22	90.52		41.96	3.18	-2.20		-1.90		147.40	132.50	123.40	192.90	0.15		119.98	5.01																46.50							53.50																	Co->14 Ni->16 Ti,V,Cr,Cu,Mn,As,Se
Pyrope	Garnet	Neso-Silicate	Mg3Al2(SiO4)3	Common accessory in sands and gravel, metamorphic rock source.	3.48	3.54		1.60		5.58	6.11		21.37	14.22	1.30		0.70								403.19	3.51			47.60			18.10		13.40		20.90																														Ca->3.5 Fe->10 Cr,Mn
Pyrrhotite		Sulfide	Fe7S8	Rare accessory in shales, igneous source.	4.45	4.58		20.55		91.50	95.49		44.26	2.93	-2.30		-2.10		53.80	34.70	213.30	362.20	0.23		647.48	4.65																60.40							39.60																	Mn,Co,Ni,Cu
Quartz	Silica	Framework Silicate	SiO2	In all rocks.	2.65	2.64	1.00	1.81	1.90	4.78	4.55	4.70	28.81	19.09	-1.10	-0.80	-2.10	-1.80	36.60	45.00	165.70	242.80	0.06	7.20	60.06	2.65			53.30		0.00		0.00		0.00	46.70	46.20		0.00		0.00		0.00		0.00					0.01			0.02								0.00	0.10	0.00	0.40	0.20	Li,Na,Al,K,Ti,Mn,Fe
Rutile		Oxide	TiO2	Common accessory in sandstones.	4.02	4.12		10.08		40.57	194.17		18.55	1.96	3.30		9.40		217.10	108.10	108.60	198.50	0.29		79.90	4.23			40.10																							59.90														Fe,Nb,Sn,Ta
Siderite		Carbonate	FeCO3	Nodules or beds in iron-rich clays.	3.83	3.91	6.00	14.69	18.60	56.22	52.78	54.20	16.16	3.50	6.30	11.10	12.90	18.40	123.70	51.00	143.70	278.60	0.32	9.00	115.86	3.96		10.40	41.40		0.40		3.00		0.70		0.40		0.00		0.30	48.20	40.00		0.00					0.04			0.01								0.40	0.50	0.50	32.50	0.90	Mg,Ca,Mn,Co,Zn
Smectite	Clay	Sheet Silicate	See specific mineral	Common in soils, sedimentary rocks and some mineral deposits; the chief constituents of bentonite and fuller's earth.			168.00		2.90			20.00				17.80		21.80													0.70		2.20		9.10		26.40		0.60		1.30		2.00		21.00					0.02			0.15								26.00	7.10	8.00	16.10	5.80		Group of expanding-lattice clay minerals which includes montmorillonite.
Sphalerite		Sulfide	ZnS	Rare accessory in detrital rocks, hydrothermal source.	3.78	3.85		35.93		135.69	40.05				-3.00		-3.00		75.20	32.30	185.70	355.30	0.31	9.50	97.45	4.00																							32.90							67.10
Sphene	Garnet	Neso-Silicate	CaTiO(SiO4)	Accessory in sands, granite source.	3.43	3.48		7.12		24.40	71.94		23.68	3.97	0.20		3.60								196.07	3.50			40.80							14.30				20.40												24.40														Na,Mg,Al,V,Mn,Sr,Nb
Spinel		Oxide	MgAl2O4	Rare accessory in sandstones.	3.74	3.81		1.49		5.57	8.46		20.60	11.96	1.70		2.00		203.10	116.10	100.70	176.80	0.26		142.28	3.80			45.00			17.10		37.90
Strontianite		Carbonate	SrCO3	Rare accessory in carbonates.	3.43	3.48		68.48		234.67	18.42														147.64	3.72		8.10	32.50																												59.40									Ca
Sulfur			S			2.02		5.43		10.97	20.22				-2.00		-3.00																																100.00
Sylvite		Halide	KCl	In evaporites.	1.91	1.86		8.51		16.27	562.94		102.18	0.93	-2.70		-4.10		17.40	9.40	257.60	459.30	0.27		74.56	1.98												52.40													47.60															Br->0.5
Thermonatrite	Hydrous Carbonate	Carbonate	CNa2O4H2	In evaporites.	2.25	2.22		0.75		1.68	18.88		9.25	4.55	43.40		44.80								124.01	2.25	1.60	9.70	51.60	37.10
Tridymite	Silica	Framework Silicate	SiO2	Rhylitic tuffs.	2.31	2.28		1.81		4.17	3.97		33.05	21.90	-1.60		-2.80								60.09	2.31			53.30							46.70
Trona	Hydrous Carbonate	Carbonate	Na2CO3NaHCO3*2(H2O)	In evaporites.	2.14	2.10		0.68		1.45	18.40		8.54	4.21	55.40		54.90				213.30				226.04	2.12	2.20	10.60	56.60	30.50
Vermiculite	Clay	Sheet Silicate	Mg.45(Mg2.8Al.2)(Si2.9Al1.1)O10(OH)2	In shales, derived from soils.	2.55	2.54		1.53		3.90	6.57		14.00	10.96	11.10		8.80								389.59	2.55	0.50		49.30			20.30		9.00		20.90
Vermiculite 4H2O	Clay	Sheet Silicate	Mg.45(Mg2.8Al.2)(Si2.9Al1.1)O10(OH)2*4(H2O)	In shales, derived from soils.	2.17	2.14		1.33		2.90	12.07		9.22	5.37	43.70		42.30								389.59	2.55	0.50		49.30			20.30		9.00		20.90
Zircon	Garnet	Neso-Silicate	ZrSiO4	Common accessory in sands, granite or hydrothermal source.	4.39	4.51		69.10		303.44	5.44						-3.00		19.80	19.70	314.30	480.70	0.13		183.31	4.68			34.90							15.30																						49.80								Th:100->2500ppm U:300->3000ppm Al,P,Ca,Fe,Nb,Sn,Hf,Ta

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