Ke-tn̂g-chit (Hàn-jī: 珪長質, Eng-gí: felsic) sī biâu-su̍t hóe-sêng-giâm sèng-chit ê hêng-iông-sû, ì-sù sī jī-sng-hòa ke-sò͘ ê hâm-liōng khah koân 65%. Jī-sng-hòa ke-sò͘ khah kē 65% ê gâm-chio̍h ū tiong-sèng, khó͘-thih-chit (苦鐵質), khó͘-thih-chit (超苦鐵質).[1]

Chiū khòng-bu̍t lâi-kóng, ke-tn̂g-chit ê gâm-chio̍h ū kâⁿ khah chē tn̂g-chio̍h kah chio̍h-eng. Chiū hòa-ha̍k sêng-hūn lâi-kóng, ke-sò͘, sng-sò͘, nā-tú-lih, a-lú-mih, ka-lí ê pí-lē khah koân.

Hoa-kong-giâm kah liû-bûn-giâm (流紋岩) lóng sī ke-tn̂g-chit ê hóe-sêng-giâm.

Miâ-chheng

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Ke-tn̂g-chit ê Eng-gífelsic” sī “feldspar” (tn̂g-chio̍h) kah “silica” (jī-sng-hòa ke-sò͘) chit nn̄g ê sû kap chò-hóe lâi--ê. Ji̍t-gí珪長質” ê hō-miâ mā sī chiàu kāng-khoán ê lí-lō͘, kiat-ha̍p “” (tn̂g-chio̍h) kah “二酸化” (jī-sng-hòa ke-sò͘). Hân-gí kah Tâi-oân-ōe lóng sī tùi Ji̍t-gí chioh-sû.

Hôa-gí sī cho͘-ha̍p “” (tn̂g-chio̍h) kah “” (chio̍h-eng), chhòng-chō chhut “長英質” chit ê sû.

Mā thang khòaⁿ

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Chham-khó bûn-hiàn

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