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https://ntrs.nasa.gov/search.jsp?R=19800015244 2019-03-02T16:04:14+00:00Z

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January 19110Hn♦ WILA%O.R-- l6 L-%"..E.—m.ISTi.- am --"&" - :661Lr - :""d

E&AT CAI Aar: ,-T `y: I« 1'ri i l;cr it) : =iJ :?JLa

Iliu£'1'IGA'::G'.: ; 3CX. - 0.50

Sn'..7" CW SICILY ANED CTtiL12

ITALW.' ARF-A.S

P- I.: Roberto CA_ICST%JSIstitutc per la Ceofisica delia Lites_fera

Corsiclio NaziGnale delie Ricerc,e

Milano (Italy)

Sf7COi PROS RI:f:S R£?T'^RT - .IFL*dLAFY Vc130

prepared by:

Roberto CASSINIS, F.I.

Giovanni Maria LECAI, Co-Investigator

Pietro Alessandro BRIVIO, Physics

Renzo MORETI'I, SoftwareEugenio ZILIOLI, Geology an3 Environment

(E80-10108) STUDY OF GEOLOGICAL STRUCTURE N80-23735OF SICILY AND OTHER ITALIAN AREAS Pro9cessReport (Consiglio Nazionale delle Ricerche,Milan) 9 P HC A02/1F A01 CSCL 080 Unclas

G3/43 00108

gKinaf photograptl y inaY to Wrrl►awA from.

EROS Data Center

Sioux Falis. SO El 19 9

-I-

1 - F i±W-fl-OSTO

Sic reff-r W s r^ Lr r f irst PTCW37ress tc-aort- Aaq .1971 as far as the cenzeral

objertivrc of tli-c surrr-v. the C'.aice of tht, best arras and t _ht it desc-ri ption, t?se

eCu."FC'r-t ::sod fcr data urc-essing, as well as the pro-cflures and gnnFral sofrrare

emplc.:ed-

?4•is rercrt will bc r..-_ relz Lidicatec to the first evalu a tion of T._'*_I_ on one

of thr sel.-cted test sites.

At the end cf w_rc•.ber 1979, tie received. two CC'S y nsc ix3cses {i,3eat_r:umi>-_rs

^ 9J1^?L^?-=s::i►ryl_'37t)2-A: 9121;Oi) r:rl tai-V t::e recordirra of the

Mete pass of June '24, 197= ivisibie + night/Say I -R-) _ These taus are the oniv

P-ate_ iUI a tar received that Car, the l-C-C-- Stdtion of A_T_ I i . e-, the --3in

Ob iective of the S::1•'J.

ne test aref erF_ data hate been processed. was selected primarl y on the base of

the cuaiiry of the image as w.-11 as of the hoc,-cenLity of night/day metec conditions.

Moreover, als.a t e geo l ogical, =orrholecical conditicns as yell as the vegetation

canopy seem quite ade.guate to try a first evaluation of A.T.1_

II - TECF` I^-_;--

II. 1 - Data bandl i-:a and sof tucare

The aiiality and the scene co^ercd by the June 2 .1 pass is ilius*_rated in Fig.?

(quick looks of visible and night/da y I.R.). The detailed investigation area is

indicate-4 by an arrow.

The ar.plication of the algorithm su ggested by LNASA for the cor.:putation of A.T.I.

gives the results illustrated by the image silo.-.n in Fig-3.

Nine levels of thermal inertia are shown inland.

In order to minimize the effect of the er 3K,ors of registration a resamplirg nrogramtvej dsvka of

has been designed and not yet. Each original pixel was subdivided

into nine "subpixels" :.hose values depend on the surrounding p ixel; a suitable

quadratic function was studied in order to reach the best fitting with the original

distribution.

In such a manner we obtained a new set of images where the "geometrical resolution"

is actually improved.

Tho image shows a very good definition not only in geometrical resolution but also

in A.T. 1. function resul utinn.

-2-

ihi s resaac•1 i nc tec^-.nicue to the A-7-1- will be Letter evaluated on Lhz near

future.

7ii.1 - Deg-r:prior. cf thf- first suh-cost area for A.T.I. (Gulf of Orosei,

Fast Sardi: =a) (i 2)

Ti-c free-c-1-4=4 win.-Scw, resulting from the first emplete day-nioht avai-

'able sass of i"!r on Sardinia, offers some interestin g features ar3 aspects for

an explcrative anal ysis etcn t_h-ouch a srelizinazyapproach remains. It extents Ce «Gtrn J

easti^2 part of the island facing to the Gulf of Oros-i: meaning geolithological

units and different kind of =o tat ,y arc n7eLPnt_ Because of the main tonic

of investigation, i.e. the rc%rk-t_.-e discrimination, a first corre_ationshia

between Cher-al irradiance and topogra phy c_ surficial occurrences (vegetation,

altitude etc_) was mandatory,to settle the possible and elementary ambiguities

which could come fram. Such a correlation has been b.:ilt and followed along twe^,^w^c4 q rriff geologic cress-sections in the window as shown in Fig.2_

Traces are justified by the need of coaparino different topographic and geologic

trends; two coastland morphologies also have been taken under consideration: the

steepened calcarec^s cliffs and the flat alluvial law1ands.

Geological setting of the area concerns nesozoic and Paleozoic sedimentary units

submitted to low folding agencies and modeled by a com pressional system of reve_se

faults. Hercynian granites, porphyries and basalts outcrop somewhere, a`ter their

crossing in different ages, through the sedimentary formations.

III.2 - Descrintion of the results

As we have already said above a first attemnt of evaluation has been

made by cross-section profiles of different meanings, i.e. the geological, topo-

graphic, IR irradiance and thermal inertia have been compared one another.

III.2.1 - Areal _ stribut.ion of A.T.I.

The image of Fig.3 sliaws the areal distribution of A.T.I. as displayed

by the monitor of the employed com puter system.

The result, are displayed in 6 bit way using the refresh memory planes (64 ,ray

levels) while the computations are developed in 8 bit way; hence, there is a

43:

sort of data com^ression during the di^L—_iav-r%hase.

For this _act the B&W inace doesn't represent the whole information content.

having, asse=17_,d t e 2 6 levels into groups of 4.

The 14 resulting levels shc-wrn in the pro:.—lc have to be considered then as

14X4=:-P0 levels full range.

III.2.2 - Thermal inertia g_ofiles and their cc+mrarison with morpholoc':,cccioo n! tht, -..31 '.S_

Alight t1her--.al irradiance profile does not se;—m to be in appropriate

agree..,ent with the topographic one, but Scala Manna Mnt. surroundings (see

,ect.A-A'). 7be general trend of the iher l profile along the two sections

mantains some cerrespordarces that could be sum-arized as follows:

- eru_rtive rocks (either extrusive and igneous) look like have relative

higher irradiance values.

Porphyries. in particular, are well contrasting whereas flat morphology occurs-

- Shales and associated rocks appear to be causing the decreasing of the values.

This fact is well clear when porphyries extrusions are closed to the shal-Es.

- Generally, nesozoic carbonatic formations, as well as the alluvial sands

and gravels, ©ant.ain lower values up to reach the relative minima.

Such a consideration is also well fit within the neighbour of Scala Manna tint.

(see sect.A-,a').

to- A negative spike (see section B-B') corresponds y+44i the contact between

gi urassic and cretaceous dolomitic limestones.

bi.4A3- Positive spii^ seem to have a general rule of discriminating the boundaries

of the outcropping formations.

Thermal inertia profiles appear smoothed in comparison with the thermal irra-

diance's, as we really expected.

Given the large differences between water and land, we have introduced two dif-

ferent scales. living a quick look at the A.T.I. profile, few notes can be

drawn:

- Sea-water maintain the largest values, as expected

- Brackish waters of Tortoli Pool are well identified, in contrast with the

surrounding alluvial deposits

- Difference_:,eo iijs to be maintained between dolomites (higher A.T.I.) and

li.nestones(lower)especially where a contact exists.

—d-

- An unex= lairable peak appears within granites cutcron, eastward Isalle

Creek (Fee as well as in the Section B-B', even thou gh lower

in amplitude. Perht2os a concentration of silica occurs.

- A general trend, but not evervr.here confirmed, seems to give the A.T.I.

profile a decreasbe in correspondance of eruptive rocks.

In general` lithoiogical contact seem to have larger influence on A.T.1.,

than proper fLting in h-togerecus formations.

However, these conclusions are hardly justifiable.a

A comparison with Landsat hands s pectral reflectivities us==^ and we hoper -n era/,,. Cosa^ to be able mai:cow it calculateM, in this way, the

vegetation influences and its actual distribution, even though, we think, it

should be very low and well defined in space.

Final conclusions need more particular obi--rvations in different sites to have

larger spectrTs of :'.ata and cases.

III.3 - New data p=ovi0ed by 11CK.*!

This is the first report containing computed A.T.I. data. However a

role of the now parameter in geolo g ical exploration seems already possible,

at least as complementary information to the thermal radiance.

IV - FUTURE WORK

The preliminary information given by A.T.I. clearly suggests the need

of additional data and processing as well as of immediate accurate collection

of ground trt.th.

In the near future, ground surveys will be done along the traces of the profiles

of Fig.4 in order to explain the A.T.I. anomalies.

Meantime, A.T.I. should be computed in other test areas in order to test its

effectiveness in different geological and environmental situations.

The CCT'S so far available, as shown by the quick looks of Fig.1, 00 not seam

to give other possibilities outside Central Sardinia, where geology does not

change appreciably in respect to the studied area of Fig.2.

Therefore we hope to receive another complete pass usable in some other test:

sites among the selected ones (viz., Tuscany or Southern Sardinia).

PAR

( a

( b )

( c )

Fig.1 - Quick looks at CCT AA0059123701-AA0059123702 (a,b)

day visible and night I.R. and CCT AA0059014103 (c)

^•F

night I.R. June 24, 1976 pass.

AA 4

``r.. X{w --_< t'^. 1:•^••• _ _ -.'ct a. Y- +v -.-. ^^ - • e^.^^ ^ Jr'!^! ,A •^^J^^i.r.swtl..ti•` •__ _ _, a = - .a UCria^ - :7: :a-s M YLU ._:I3S.' J: _ 173;u •r% %/t:,^: ^'

C. - Y _ i •a -i y_;_,_ Litt ,^~^^• `V! • ^: ^6,attr+e b P ckn:^x:r

• - _: ` ^-^!• ^ ^ .. - - '.v.Sa :^' _' ••^ -^E`, +;' fir-

}^^ • ^ _ uro.•••,-a:: Y :•ae'ee Ja •^i a'a Gs+u^e

^^ L_ Y- '•' •I,•_. • .. ~-^a• ' •''^• .^ ^^'.-QIK-fl0 7 _ -ti•' y r YSUPIA i. • '^ •^+f

.. '_ tCL^ll I, •'^ r ,- .$at --

- ` •,• r^.}' `•1," t'tAtw Dt SAY '^ Y :.'• `` _ T,t-j'tiA' i, ('i.^u 1 ^ ,^P. Z ice' r ^`r ^{^r^^

R 6^A G.l A' 'r. ".' ` _ • ^•^1 i _ •._;f _ f^};. s v . f Orta,u^tp,:rra,. S' PIS ..0 u trt A J ♦r , tea +F21 ` •- •.'j,i 1 , - ^,-- , t . _ r _ _ - - . s !. !' j ( - •'< - C.h S:r,e

All

?ii Jn ^ ,GaYOr '^ i f, , ! - rt cx :S (U:G$ f ` '' i tt ^^ , -t r ..

P 1 ,-:1 ^ v : r r n i - _ ^ L ^ _ _ - t 1 • ^_,.. ry S,,i.,y. .^?r1T

L''

^_^j ^^{{ !oc r^ "l. 1. •'i yy: . } ' 206 S ur

2PbZPC,`

Fo i ^^.^ t V 1 1. P ItpuLy darnf ►,f c .:ius,l ^ .. r J ^ ^ `.^..a /' a ty L ^.t •4'•,': '.^t•!::' a^ ', `t'\ '`'

P. i { ^ { + P C1'CC:Ivr)dde i',iCn 1. v ^'- -^

3' ^, c'•\4'3 t Cris : _

viGSL"", s

2:C i 4 f ^'. r ^x. - ti S , •! ado di 1'C:.IvtD(w ^r„ fat //

',nt+ c. - - -t _ _..^.--'y^J- ^'^, b7•, J aa . .an u

tPS.0 Y - - V

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_ Fig. - Geological map of = _ -^TatanLti °- -y.

the test site of Orosei t ;: •',22s 3'' t ►rlwcaou u 3i ` •<d i II

t, •ar ^^ ti - ,.^edtna^bay (Eastern Sardinia) . } ^,` ,'1 ! -^• P'tdnlon;x'' 2

iPhInr^: ^J

The area where A.T.I. ?^ C'rc"^}`i;^^ l °^, ?.; ^}^•?bin

has been computed as, ,y) well as the TJrof l l e $

rs1 oFt " }_ _.,..^y :'• ^--, z ♦-1 :'c

{ Af y` ^'.• ^/' _ ,`: a + •. -i

a r r, i n,1 ) . l . ) - ♦ t.` t = . S F! W \ J'^5 Nm.a A'.!vJ„

0 244Afrt1. i- , o? C , •+^ 2IF, (/ \' t^rn1 . • 11• _ : ^lUlPt.a^ S (IA1atu of ♦. . 'e^•'10nr}gala oruoeu•n•.

(: H ♦_^ ... ' _ , r ^'-.___r000!^ .. '''- ^ l ^J7ft `:a ♦ r.{uL ^ It ...^•_^-

a-s -' • .t.-:La:.,•( ^:r .. .: Lb c ^'- ^1 rase

,- 72.;1 • .. ;^. , ^ 1e ., . i a S /, Q.• AJO^ ^, t I' ^'^ ,(_,`+.;t3a' er 1 : r . ^, a7, ; _ h E, * r _,^ 2268; i -T,:"ksJr e- \. 1 \ Sri ,' i a^\ ' -1.4,b,fat

r '^.I * ` .+•',r^ IDl p 2 0 Tortoll.l s. ,rJ •o P,".r..vr

F . -= . Cb ^' rf bin C nrn.1, ata

r:r %t•'t r r.. 3. - v: Ar LU,,, 7f! `^ r'. ♦ t rff „PS G.,..,,,, a

1 __ w ;fP .r,: 9 t tt ,,; .at. r: loi ♦ ' f rPb'aCu ij ' a " _ ` Atr.,n, a n•a,,.,,vt)a r: f'•:!•. 't ...r•r, f.' - '•N,r^P^ oft ;i..r . .0an ,.,. , ^^

_, _.••,., ,^„ t R J •na♦ ^Tnr^ r -r •:• 'ti. n• ^ :9a Zvi,Pi^ .1! 192" t :r

Y ,Id me

;•a1 ' ' r .f

r -, ^ ^l1•• '".^, rt.0 oFt , J . t IINVESTIGATED AREA

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Fig.? - A.T.L. areal distribution in the area of Fig.2 as di-

splayed by the monitor of the cemputer system.

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