Page 38 - Caldera Volcanism Analysis, Modelling and Response

Magma production rate km 3 y 1 (vol/residence time) 2 10 4 2 10 5 –2 10 6 2 10 4 –10 4 4 10 6 10 4 –2 10 5 1.3 10 1 – 7.5 10 3

residence up peak), (w/youngest (w/oldest 9 ky to peak) (w/oldest 4 ky to peak) (w/oldest 4 ky to peak), [C05], 2.5 ky [C05], 40 ky

zone. Magma 26 ka 105 ky (w/oldest 12 ky peak) 13 ky up peak), (w/youngest 1571ky 22 ky up peak), (w/youngest peak clear 70 ky up peak), (w/youngest ca. ca. max.

volcanic time b Unknown to Up to Up to to Up to Up to Up No to Up min.

Taupo Oldest ages

the
of [C05]
rocks Zircon U--Pb (SIMS) 244 ka–524 Ma [C05]

silicic age 92–527 Ma [C05]

caldera-related disequilibrium bulk-rock, or glass minerals (+20.2/ 16.7) ka [C00] (+18/ 16) ka

the U--Th age 12.6 33
of [C05] and
rates Zircon U--Th disequilibrium age 29.771.1 ka 40.770.7 ka– 113.272.9 ka [C05] 18.970.6 ka– 23.670.5 ka [C05] 25.470.6 ka 27.971.1 ka [C05] 23.870.6 ka [C05] 36.971.0 ka [C05]

process model (TIMS) 16.070.9– 32.070.5–

and age peaks and [C05] peaks 34 ka peaks and [C05]

times Zircon U--Th disequilibrium model (SIMS) 9–W350 ka, 43 18, at 109 ka 12–100 ka, and 23 at [C05] 30–W350 ka [C05] o26.5–200 ka, 32–39 ka at 94–96 ka
residence [F&L90] [W93] [W93] [W93] [W93] ca. [W93] ca. (bracket [N03] [W93] & [W88

data, 40 Ar/ 39 Ar, K--Ar or 14 C a age (eruption) 1.8 ka 3.6 ka 6.7 ka 10.0 ka 11.4 ka 11.8 ka 20 ka only) 18.8 ka 26.5 ka W01]
age [W93]
volumes, (km 3 ) Vol caldera [W93] 13.4 [W93] 5.1 o0.21 [W93] 1.4 [W93] 0.06 [W93] 0.42 [W93] 0.03 [W01] 530

Units, zone and D/Acacia dome Omega

3 volcanic volcano Y Unit S Unit G Unit E Unit Unit Bay B Unit Unit Oruanui eruption
Table T aupo Taupo