Dab tsi yog qhov txhais ntawm batholith hauv thaj chaw?
Dab tsi yog qhov txhais ntawm batholith hauv thaj chaw?

Video: Dab tsi yog qhov txhais ntawm batholith hauv thaj chaw?

Video: Dab tsi yog qhov txhais ntawm batholith hauv thaj chaw?
Video: Qhia txhais 40 zaj npau suav tias yog dab tsi part 2 15 Sep 2019 2024, Kaum ib hlis
Anonim

A da dej (los ntawm Greek bathos, qhov tob + lithos, pob zeb) yog ib tug loj loj ntawm intrusive igneous pob zeb (tseem hu ua plutonic pob zeb), loj tshaj 100 square kilometers (40 sq mi) nyob rau hauv cheeb tsam, uas tsim los ntawm txias magma tob nyob rau hauv lub ntiaj teb crust.

Ua raws li qhov no hauv kev txiav txim siab, dab tsi ua rau tus da dej?

Ladakh batholiths nyob rau hauv lub Himalayas. A da dej yog ib tug loj loj ntawm intrusive igneous pob zeb uas tsim thaum magma sau thiab txias nyob rau hauv lub ntiaj teb lub crust yam tsis tau raug rau saum npoo. A da dej feem ntau yog loj dua 40 square mais. Lub ntsiab muaj pes tsawg leeg ntawm a da dej yog coarse grained granite.

Tsis tas li ntawd, lub batholith nyob qhov twg? Batholiths yog qhov loj, nce tsawg kawg yog 100 square kilometers saum npoo ntawm lub ntiaj teb, uas yog vim li cas lawv thiaj li nyuaj rau nco. Lawv yog ua los ntawm plutons, uas yog lawv tus kheej ob peb kilometers nyob rau hauv lub cheeb. Batholiths tuaj yeem yog pom thoob plaws ntiaj teb, los ntawm Yosemite National Park mus rau Canada's Coast Range.

Kuj Paub, dab tsi yog da dej da dej zoo li?

A da dej muaj qhov tsis sib xws nrog sab phab ntsa uas incline steeply tiv thaiv tus tswv tsev pob zeb. Feem ntau batholiths intrude hla roob folds thiab yog elongated raws qhov tseem ceeb axis ntawm qhov ntau; faulting thiab tiv tauj metamorphism ntawm lub pob zeb enveloping nyob ze ntawm lub da dej kuj pom.

Yuav ua li cas yog ib tug piv txwv ntawm ib tug batholith nyob rau hauv lub tebchaws United States?

Piv txwv suav nrog Sierra Nevada Batholith , uas ua rau feem ntau ntawm Sierra Nevada hauv California, Idaho Batholith , uas yog ib feem ntawm Northern Rocky Roob hauv Idaho, thiab Dawb Roob Batholith , uas yog ib feem ntawm Dawb Roob ntawm New Hampshire.

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