L06_Sandstone Clans_Key - Lab 6 Key Quartz Arenites...

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Lab 6 Key Quartz Arenites TQ-6-KTX (ZBY) 1) calcite 2) chert (altered, brown) and limestone (more common, brown and grey) 3) low amounts of porosity + cements, pressure solution, long-grain-to-grain contacts, over-sized pores, fractures, tight packing of framework 4) subrounded to well rounded (sparse angular) 5) recycled (second cycle) due to SRFs TQ-55-CMo (ZHF) 1) F 80-75 M 0 C 5 P 15-20 2) Quartz 3) Well (to moderate) 4) Well-rounded (before overgrowths!!) TQ-104-DMo (XYG) F 75-80 M 0 C 15-20 P <5 : Q 100 F trace R trace 1) 60-70% 2) quartz 3) rounded 4) quartz doesn’t like to associate with phosphates (not as likely to nucleate) 5) OMIT Litharenites TL-17-OX (ZIF) 1) SRFs are most common, but also VRFs and MRFs 2) Calcite 3) <1% 4) fractured grains, ductile deformation of micas to pseudomatrix, low porosity , long grain contacts 5) Sedimentary basin (mostly SRFs) (tl)-107-MiMX (YGM) 1) cement – no hand sample 2) VRF’s 3) igneous volcanic provenance TL-134-JrMt (ZZL) 1) Kaolinite and minor Quartz 2) 2-10 % (depends on sample) 3) recyling of older sedimentary rocks (abundant chert) 1
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